PROPOSED SMPTE STANDARD

Transcription

1 PROPOSED SMPTE STANDARD SMPTE 7M for Television Data Structure for DV Based Audio, Data and Compressed Video at Mb/s - 8/6i, 8/5i, 7/6p Table of contents Scope Normative references Interface 4 Video compression Scope This standard defines the data structure for the interface of DV-Based digital audio, subcode data, and compressed video at Mb/s. The standard defines the processes required to decode the DV-based data structure into eight channels of AES- digital audio at 48 khz, subcode data, and high definition video at 8/6i, 8/5i and 7/6p. The following high definition video parameters are used in this standard: 8/6i system Input video format: 9 x 8 image sampling structure, Hz field rate, interlace format. Compressed video data rate: Mb/s 8/5i system Input video format: 9 x 8 image sampling structure, 5 Hz field rate, interlace format. Compressed video data rate: Mb/s 7/6p system Input video format: 8 x 7 image sampling structure, Hz frame rate, progressive format. Compressed video data rate: Mb/s In this document, the 6 Hz system nomenclature refers to both 8/6i and 7/6p systems, whereas, the 5 Hz system refers only to the 8/5i system. The nomenclature 8 line system refers to both 8/6i and 8/5i systems, while, the 7 line system refers only to the 7/6p system. Page of 6 pages Copyright by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 West Hartsdale Avenue, White Plains, NY THIS PROPOSAL IS PUBLISHED FOR COMMENT ONLY

2 SMPTE 7M Normative references The following standards, through reference in this text, constitute provisions of this standard. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. ANSI/SMPTE M-999 Television, Audio and Film ---- Time and Control Code SMPTE 74M x 8 Scanning and Analog and Parallel Digital Interfaces for Multiple Picture Rates SMPTE 6M-999 5/6 High-Definition Production System -- Digital Representation and Bit Parallel Interface SMPTE 96M-997 8x7 Scanning, Analog and Digital Representation and Analog Interface AES-99 Serial transmission format for two-channel linearly represented digital audio data Data processing. General As shown in figure, processed audio, video and subcode data are output for recording on a D-xx recorder. Additionally this data are output in DIF format data for the different application through a digital interface port. Detail of process shown in figure is described in clauses and 4. Dotted lines are related to data flow described in VTR document. Annex A shows the block diagram of D-xx recorder. Figure A. of this document shows the part defined by this compression format document... Video encoding parameter The source component signal to be processed shall comply with the video parameters as defined by SMPTE 74M and SMPTE 96M... Audio encoding parameter The audio signal is sampled at 48 khz, with 6 bit quantization defined by AES... Subcode data The time code format in subcode area comply with SMPTE M...4 Frame structure In 8/6i and 8/5i systems, video frame data, audio frame data, and subcode data are processed in each frame. The audio frame in this document is defined as an audio-processing unit. In the 7/6p system, data in two video frames are processed within one frame duration of the 8/6i system. Consequently, audio data and subcode data are processed in same way as the 8/6i system. Each frame of time code shows a frame number that corresponds to each video frame in the 8 line system, and two video frames each in 7/6p system. Therefore time codes of the 8/6i and 7/6p system are the same. Page of 6 pages

3 SMPTE 7M Video 74M 96M Sampling Conversion Blocking/ Shuffling DCT Weighting Quantization VLC/ Formatter Recording 8 / bits 8 bits or more Rate control DIF formatter DIF Audio AES Shuffling Subcode M Figure Data processing block diagram. Data structure The data structure of the compressed stream at the digital interface is shown in figure. The data of each frame are divided into four DIF channels. Each DIF channel is divided into DIF sequences for the 6 Hz system and DIF sequences for the 5 Hz system. Each DIF sequence consists of a header section, subcode section, VAUX section, audio section, and video section with the following DIF blocks respectively; Header section: Subcode section: VAUX section: Audio section: Video section: DIF block DIF blocks DIF blocks 9 DIF blocks 5 DIF blocks As shown in figure, each DIF block consists of a -byte ID and 77 bytes of data. DIF data bytes are numbered to 79. Figure shows the data structure of a DIF sequence. Page of 6 pages

4 SMPTE 7M Data in one frame First channel Second channel Third channel Fourth channel DIF sequences DIF sequence, DIF sequence, DIF sequence n-, DIF sequence, DIF sequence n-, DIF sequence number DIF channel number Structure of a DIF sequence Header section Subcode section VAUX section Audio & video section DIF blocks H, SC, SC, VA, VA, VA, A, V, V, V, V4, Structure of a DIF block Byte position number ID Data DIF block number DIF channel number Where n = for 6 Hz system n = for 5 Hz system Figure - Data structure Page 4 of 6 pages

5 SMPTE 7M DIF blocks H,i SC,i SC,i VA,i VA,i VA,i A,i V,i V,i V,i V,i V4,i V5,i V6,i V7,i V8,i V9,i V,i V,i V,i V,i V4,i A,i V5,i V6,i V7,i V8,i V9,i V,i V,i V,i V,i V4,i V5,i V6,i V7,i V8,i V9,i A,i V,i V,i V,i V,i V4,i V5,i V6,i V7,i V8,i V9,i V4,i V4,i V4,i V4,i V44,i A,i V45,i V46,i V47,i V48,i V49,i V5,i V5,i V5,i V5,i V54,i V55,i V56,i V57,i V58,i V59,i A4,i V6,i V6,i V6,i V6,i V64,i V65,i V66,i V67,i V68,i V69,i V7,i V7,i V7,i V7,i V74,i A5,i V75,i V76,i V77,i V78,i V79,i V8,i V8,i V8,i V8,i V84,i V85,i V86,i V87,i V88,i V89,i A6,i V9,i V9,i V9,i V9,i V94,i V95,i V96,i V97,i V98,i V99,i V,i V,i V,i V,i V4,i A7,i V5,i V6,i V7,i V8,i V9,i V,i V,i V,i V,i V4,i V5,i V6,i V7,i V8,i V9,i A8,i V,i V,i V,i V,i V4,i V5,i V6,i V7,i V8,i V9,I V,i V,i V,i V,i V4,i DIF block number where i : DIF channel number i =,,, H,i : DIF block in header section SC,i to SC,i : DIF blocks in subcode section VA,i to VA,i : DIF blocks in VAUX section A,i to A8,i : DIF blocks in audio section V,i to V4,i : DIF blocks in video section Figure - Data structure of a DIF sequence. Header section.. ID The ID part of each DIF block in the header section, shown in figure, consists of bytes (ID, ID, ID). Table shows the ID content of a DIF block. Page 5 of 6 pages

6 SMPTE 7M Table - ID data of a DIF block Byte position number ID ID ID MSB SCT Dseq DBN7 SCT Dseq DBN6 SCT Arb Arb Arb Dseq Dseq FSC FSP DBN5 DBN4 DBN DBN DBN LSB Arb DBN The ID contains the followings : SCT : Section type ( See table ) Dseq : DIF sequence number ( See table and 4 ) FSC, FSP : Channel identification of a DIF block ( See table 5 ) NOTE : FSP bit is reserved in SMPTE 4M DBN : DIF block number ( See table 6 ) Arb : : Arbitrary bit erved bit for future use Default value shall be set to Table - Section type Section type bit SCT SCT SCT Section type Header Subcode VAUX Audio Video erved Page 6 of 6 pages

7 SMPTE 7M Table - DIF sequence number for the 6 Hz system DIF sequence number bit Dseq Dseq Dseq Dseq DIF sequence number Not used Not used Not used Not used Not used Not used Table 4 - DIF sequence number for the 5 Hz system DIF sequence number bit Dseq Dseq Dseq Dseq DIF sequence number Not used Not used Not used Not used Table 5 - DIF channel number FSC FSP DIF channel number : first channel : second channel : third channel : fourth channel Page 7 of 6 pages

8 SMPTE 7M Table 6 - DIF block number DIF block number bit DBN7 DBN6 DBN5 DBN4 DBN DBN DBN DBN DIF block number 4 Not used : : : : : : : : : Not used.. Data The data part (payload) of each DIF block in the header section is shown in table 7. Bytes to 7 are active and bytes 8 to 79 are reserved. Table 7 - Data (payload) in the header section MSB LSB Byte position number DSF APT APT APT TF AP AP AP TF AP AP AP TF AP AP AP DSF : DIF sequence flag = DIF sequences included in a DIF channel ( 6 Hz system ) = DIF sequences included in a DIF channel ( 5 Hz system ) APTn, APn, APn, and APn data shall be identical to the track application IDs ( APTn =, APn =, APn =, APn = ), if the source signal comes from the DV based digital VCR. If the signal source is unknown, all bits for this data shall be set to. T F : Transmitting flag TF : Transmitting flag of audio DIF blocks TF : Transmitting flag of VAUX and Video DIF blocks TF : Transmitting flag of subcode DIF blocks = Valid data = Invalid data. : erved bit for future use Page 8 of 6 pages

9 SMPTE 7M Default value shall be set to..4 Subcode section.4. ID The ID part of each DIF block in the subcode section is the same as described in... The section type shall be..4. Data The data part (payload) of each DIF block in the subcode section is shown in figure 4. The subcode data consists of 6 SSYBs, each 48 bytes long, and a reserved area of 9 bytes in each DIF block. SSYBs in a DIF sequence are numbered to. Each SSYB is composed of an SSYB ID equal to bytes, an FFh, and an SSYB data payload of 5 bytes. Byte position number SC,i ID erved 9 bytes Data SSYB SSYB SSYB SSYB SSYB4 SSYB5 Byte position number SC,i ID erved 9 bytes Data SSYB6 SSYB7 SSYB8 SSYB9 SSYB SSYB SSYB ID SSYB ID FFh SSYB data 8 bytes Figure 4 - Data in the subcode section Page 9 of 6 pages

10 SMPTE 7M.4.. SSYB ID Table 8 shows the parts of SSYB ID ( ID, ID ). It contains FR ID, application ID ( AP, AP, AP ), ( APT, APT, APT ), and SSYB number ( Syb, Syb, Syb, Syb ). Table 8 - SSYB ID FR : The identification for the first half or second half of each DIF channel. = the first half of each DIF channel = the second half of each DIF channel The first half of each DIF channel DIF sequence number,,,, 4 for 6 Hz system DIF sequence number,,,, 4, 5 for 5 Hz system The second half of each DIF channel DIF sequence number 5, 6, 7, 8, 9 for 6 Hz system DIF sequence number 6, 7, 8, 9,, for 5 Hz system If information is not available, all bits shall be set to..4.. SSYB data Bit position SSYB number SSYB number SSYB number and 6 to 5 and 7 to ID ID ID ID ID ID b7 FR Arb FR Arb FR Arb b6 AP Arb Arb APT Arb b5 AP Arb Arb APT Arb b4 AP Arb Arb APT Arb b Arb Syb Arb Syb Arb Syb b Arb Syb Arb Syb Arb Syb b Arb Syb Arb Syb Arb Syb b Arb Syb Arb Syb Arb Syb NOTE Arb = arbitrary bit Each SSYB data payload consists of a pack of 5 bytes as shown in figure 5. Table 9 shows the pack header table (PC byte organization). Table shows the pack arrangement in SSYB data for each DIF channel. SSYB ID SSYB ID FFh SSYB data 5 bytes Pack PC PC PC PC PC4 Figure 5 - Pack in SSYB Page of 6 pages

11 SMPTE 7M Table 9 - Pack header table UPPER LOWER AUDIO SOURCE AUDIO SOURCE CONTROL VIDEO SOURCE VIDEO SOURCE CONTROL TIME CODE BINARY GROUP NO INFO Table - Mapping of packets in SSYB data SSYB number The first half of each DIF channel The second half of each DIF channel erved erved erved erved erved erved TC TC 4 BG erved 5 TC erved 6 erved erved 7 erved erved 8 erved erved 9 TC TC BG erved TC erved NOTES TC = time code pack. BG = binary group pack. erved = default value of all bits shall be set to. 4 TC and BG data are the same within each frame. The time code data are an LCT type.4... Time code pack (TC) Table shows a mapping of the time code pack. Time code data mapped to the time code packs are the same within each frame. Page of 6 pages

12 SMPTE 7M 6 Hz system 5 Hz system Table - Mapping of time code pack MSB LSB PC PC CF DF TENS of FRAMES UNITS of FRAMES PC PC TENS of SECONDS UNITS of SECONDS PC BGF TENS of MINUTES UNITS of MINUTES PC4 BGF BGF TENS of HOURS UNITS of HOURS MSB LSB PC PC CF Arb TENS of FRAMES UNITS of FRAMES PC BGF TENS of SECONDS UNITS of SECONDS PC BGF TENS of MINUTES UNITS of MINUTES PC4 PC BGF TENS of HOURS UNITS of HOURS NOTE - Detailed information is given in ANSI/SMPTE M. CF : Color frame = unsynchronized mode = synchronized mode DF : Drop frame flag = Nondrop frame time code = Drop frame time code PC : Biphase mark polarity correction = Even = Odd BGF : Binary group flag Arb : Arbitrary bit.4... Binary group pack (BG) Table shows the mapping of binary group pack. Binary group data mapped to the binary group packs are the same within each frame..5 VAUX section Table - Mapping of binary group pack MSB LSB PC PC BINARY GROUP BINARY GROUP PC BINARY GROUP4 BINARY GROUP PC BINARY GROUP6 BINARY GROUP5 PC4 BINARY GROUP8 BINARY GROUP7 Page of 6 pages

13 SMPTE 7M.5. ID The ID part of each DIF block in the VAUX section is the same as described in... The section type shall be..5. Data The data part (payload) of each DIF block in the VAUX section is shown in figure 6. This figure shows the VAUX pack arrangement for each DIF sequence. There are 5 packs, each 5 bytes long, and two reserved bytes in each VAUX DIF block payload. A default value for the reserved byte is set to FFh. Therefore, there are 45 packs in a DIF sequence. VAUX packs of the DIF blocks are sequentially numbered to 44. This number is called a video pack number. Table shows the mapping of the VAUX packs of the VAUX DIF blocks. A VAUX source pack (VS) and a VAUX source control pack (VSC) must exist in each frame. The remaining VAUX packs of the DIF blocks in a DIF sequence are reserved and the value of all reserved words is set to FFh. If VAUX data are not transmitted, a NO INFO pack, which is filled with FFh, shall be transmitted. Byte position number VA,i ID VA,i ID VA,i ID Pack number Pack header Pack data PC PC PC PC PC4 Figure 6 - Data in the VAUX section Table - Mapping of VAUX pack in a DIF sequence Page of 6 pages

14 SMPTE 7M Pack number Even DIF sequence Odd DIF sequence Pack data 9 VS 4 VSC Even DIF sequence: DIF sequence number,, 4, 6, 8 for 6 Hz system DIF sequence number,, 4, 6, 8, for 5 Hz system Odd DIF sequence: DIF sequence number,, 5, 7, 9 for 6 Hz system DIF sequence number,, 5, 7, 9, for 5 Hz system.5.. VAUX source pack (VS) Table 4 shows the mapping of a VAUX source pack. Table 4 - Mapping of VAUX source pack MSB LSB PC PC PC PC 5/6 STYPE PC4 5/6 : = 6 Hz system = 5 Hz system STYPE : Video signal type For 6 Hz system b = 8/6i - Mb/s compression (active line 8) b = 8/6i - Mb/s compression (active line 5) b = 7/6p - Mb/s compression Other = erved For 5 Hz system b = 8/5i - Mb/s compression Other = erved : erved bit for future use Default value shall be set to..5.. VAUX source control pack Table 5 shows mapping of VAUX Source Control pack. Page 4 of 6 pages

15 SMPTE 7M Table 5 - Mapping of VAUX Source Control pack MSB LSB PC PC CGMS PC DISP PC FF FS FC PC4 CGMS : Copy generation management system b = Copy free Other = erved DISP : Display select mode b = 6:9 Other = erved FF : Frame/Field flag For the 8 line system ( See table 6 ) FF indicates whether two consecutive fields are delivered, or one field is repeated twice during one video frame period ( See table 6 ) = Only one of the two fields is delivered twice = Both fields are delivered in order. For the 7 line system ( See table 7 ) FF indicates whether two consecutive video frames are delivered, or one video frame is repeated twice during the two video frames period. = Only one of the two video frames is delivered twice. = Both video frames are delivered in order. FS : First/Second field flag For the 8 line system ( See table 6 ) FS indicates a field which is delivered during the field one period ( See table 6 ) = Field is delivered = Field is delivered. For the 7 line system ( See table 7 ) FS indicates a video frame which is delivered during the video frame one period. = Video frame is delivered. = Video frame is delivered. Table 6 - FF/FS for the 8 line system FF FS Output field Field and field are output in this order (, sequence). Field and field are output in this order (, sequence). Field is output twice. Field is output twice. Page 5 of 6 pages

16 SMPTE 7M Table 7 - FF/FS for the 7 line system FF FS Output video frame Video frame and video frame are output in this order (, sequence). Video frame and video frame are output in this order (, sequence). Video frame is output twice. Video frame is output twice. FC : Frame change flag For the 8 line system FC indicates whether the picture of the current video frame is repeated based on immediate previous video frame. = Same picture as the previous video frame = Different picture than the previous video frame For the 7 line system FC indicates whether the picture of the current two video frames is repeated based on immediate previous two video frames. = Same picture as the previous two video frames = Different picture than the previous two video frames : erved bit for future use Default value shall be set to..6 Audio section.6. ID The ID part of each DIF block in the audio section is the same as described in... The section type shall be..6. Data The data part (payload) of each DIF block in the audio section is shown in figure 7. The data of a DIF block in the audio section are composed of 5 bytes of audio auxiliary data (AAUX) and 7 bytes of audio data which is encoded and shuffled by the process as described in.6.. and.6... Byte position number ID Audio auxiliary data Audio data Figure 7 - Data in the audio section.6.. Audio encoding.6... Source coding Each audio input signal is sampled at 48kHz, with 6-bit quantization. The system provides eight audio channels. Audio data for each audio channel are located in each respective audio block. Page 6 of 6 pages

17 SMPTE 7M.6... Emphasis The audio encoding is carried out with the first order pre-emphasis of 5/5µs. For the analog input recording, emphasis shall be off in the default state Audio error code In the encoded audio data, 8h shall be assigned as an audio error code to indicate an invalid audio sample. This code corresponds to negative full scale value in ordinary twos complement representation. When the encoded data includes 8h, it shall be converted to 8h Relative audio-video timing 8 line system An audio frame begins with an audio sample acquired within the duration of minus 5 samples relative to zero samples from the start of line number. 7 line system An audio frame begins with an audio sample acquired within the duration of minus 5 samples relative to zero samples from the start of line number of video frame Audio frame processing The audio data is processed in each audio frame. Each audio frame contains 6 or 6 audio samples for the 6Hz system or 9 audio samples for the 5 Hz system for an audio channel with associated status, user, and validity data. For the 6 Hz system, the number of audio samples per audio frame shall follow the five-frame sequence as shown below: 6, 6, 6, 6, 6 samples. One audio frame shall be capable of 6 samples for the 6 Hz system or 944 samples for the 5 Hz system. The unused space at the end of each audio frame is filled with arbitrary values..6.. Audio shuffling The 6-bit audio data word is divided into two bytes. The upper byte contains MSB, and the lower byte contains LSB, as shown in figure 8. Audio data shall be shuffled over DIF sequences and DIF blocks within an audio frame. The data bytes are defined as D n (n =,,,...) which is sampled in the n-th order within an audio frame and shuffled by each D n unit. The data shall be shuffled through a process as expressed by the following equations; 6 Hz system: DIF channel number i = : Audio CH,CH i = : Audio CH,CH4 i = : Audio CH5,CH6 i = : Audio CH7,CH8 DIF Sequence number : (INT (n/) + x (n mod )) mod 5 (INT (n/) + x (n mod )) mod for Audio CH,CH,CH5,CH7 for Audio CH,CH4,CH6,CH8 Audio DIF block number : x (n mod ) + INT ((n mod 45) / 5) Byte position number : 8 + x INT(n/45) for the most significant byte 9 + x INT(n/45) for the least significant byte Page 7 of 6 pages

18 SMPTE 7M where n = to 69 5 Hz system: DIF channel number i = : Audio CH,CH i = : Audio CH,CH4 i = : Audio CH5,CH6 i = : Audio CH7,CH8 DIF Sequence number : (INT (n/) + x (n mod )) mod 6 (INT (n/) + x (n mod )) mod for Audio CH,CH,CH5,CH7 for Audio CH,CH4,CH6,CH8 Audio DIF block number : x (n mod ) + INT ((n mod 54) / 8) Byte position number : 8 + x INT(n/54) for the most significant byte 9 + x INT(n/54) for the least significant byte where n = to 94 MSB 6 bits LSB Upper Lower bits 8 bits Figure 8 Conversion of audio sample to audio data bytes.6.. Audio auxiliary data (AAUX) AAUX shall be added to the shuffled audio data as shown in figures 7 and 9. The AAUX pack shall include an AAUX pack header and data (AAUX payload). The length of the AAUX pack shall be 5 bytes as shown in figure 9, which depicts the AAUX pack arrangement. Packs are numbered to 8 as shown in figure 9. This number is called an audio pack number. Table 8 shows the mapping of an AAUX pack. An AAUX source pack (AS) and an AAUX source control pack (ASC) must be included in the compressed stream. Page 8 of 6 pages

19 SMPTE 7M Byte position number ID Audio auxiliary data Audio data 5 bytes A,i A,i A,i A,i A4,i A5,i A6,i A7,i A8,i Audio pack number Audio pack number Audio pack number Audio pack number Audio pack number 4 Audio pack number 5 Audio pack number 6 Audio pack number 7 Audio pack number 8 Pack header Pack data PC PC PC PC PC4 Figure 9 - Arrangement of AAUX packs in audio auxiliary data Table 8 - Mapping of AAUX pack in a DIF sequence Audio pack number Even DIF sequence Odd DIF sequence Pack data AS 4 ASC Even DIF sequence : DIF sequence number,, 4, 6, 8 for 6 Hz system DIF sequence number,, 4, 6, 8, for 5 Hz system Odd DIF sequence : DIF sequence number,, 5, 7, 9 for 6 Hz system DIF sequence number,, 5, 7, 9, for 5 Hz system.6... AAUX source pack (AS) The AAUX Source pack is configured as shown in Table 9. Page 9 of 6 pages

20 SMPTE 7M MSB Table 9 - Mapping of AAUX Source pack PC PC LF AF SIZE PC CHN AUDIO MODE PC 5/6 STYPE PC4 SMP QU LF : Locked mode flag Locking condition of audio sampling frequency with video signal. = Locked mode = erved AF SIZE : the number of audio samples per frame b = 6 samples / frame ( 6 Hz system ) b = 6 samples / frame ( 6 Hz system ) b = 9 samples / frame ( 5 Hz system ) Other = erved CHN : The number of audio channels within an audio block b = One audio channel per an audio block Other = erved An audio block consists of 45 DIF blocks ( 9 DIF blocks x 5 DIF sequences ) for the 6 Hz system and 54 DIF blocks ( 9 DIF blocks x 6 DIF sequences ) for the 5 Hz system. AUDIO MODE : The contents of the audio signal on each audio channel b = Audio CH,CH,CH5,CH7 b = Audio CH,CH4,CH6,CH8 b = Invalid audio data Other = erved 5/6 : = 6 Hz system = 5 Hz system STYPE : Audio blocks for each frame b = 8 audio blocks Other = erved SMP : Sampling frequency b = 48 khz Other = erved QU : Quantization b = 6 bits linear Other = erved : erved bit for future use Default value shall be set to AAUX source control pack (ASC) The AAUX source control pack is configured as shown in Table. LSB Page of 6 pages

21 SMPTE 7M Table - Mapping of AAUX Source Control pack MSB LSB PC PC CGMS EFC PC REC ST REC END FADE ST FADE END PC DRF SPEED PC4 CGMS : Copy generation management system b = Copy free Other = erved EFC : Emphasis audio channel flag b = Emphasis off b = Emphasis on Other = erved EFC shall be set for each audio block. REC ST : Recording start point = Recording start point = Not recording start point At a recording start frame, REC ST lasts for a duration of one audio block which is equal to 5 or 6 DIF sequences for each audio channel. REC END : Recording end point = Recording end point = Not recording end point At a recording end frame, REC END is lasting for a duration of one audio block which is equal to 5 or 6 DIF sequences for each audio channel. FADE ST : Fading of recording start point = Fading off = Fading on The FADE ST information is only effective at the recording start frame ( REC ST = ).If FADE ST is at the recording start frame, the output audio signal should be faded in from the first sampling signal of the frame. If FADE ST is at the recording start frame, the output audio signal should not be faded. FADE END : Fading of recording end point = Fading off = Fading on The FADE END information is only effective at the recording end frame ( REC END = ). If FADE END is at the recording end frame, the output audio signal should be faded out to the last sampling signal of the frame. If FADE END is at the recording end frame, the output audio signal should not be faded. DRF : Direction flag = Reverse direction = Forward direction SPEED : shuttle speed of VTR ( See table ) Page of 6 pages

22 SMPTE 7M Table SPEED code definition Codeword Shuttle speed of VTR MSB LSB 6 Hz system 5 Hz system : erved bit for future use Default value shall be set to..7 Video section.7. ID / (=) / (=) / / : : : / / (=) : : erved / (=) erved : erved erved erved erved Data invalid Data invalid The ID part of each DIF block in the video section is the same as described in... The section type shall be..7. Data Data part (payload) of each DIF block in Video section consists of 77 bytes of video data which shall be sampled, shuffled and encoded. Video data of every frame is processed as described in clause 4. This 77 byte data are called a compressed macro block..7.. DIF block and compressed macro block Correspondence between Video DIF blocks and video compressed macro blocks CM h,i,j,k is shown in Table for the 6 Hz system and table for the 5 Hz system. The rule defining the correspondence between video DIF blocks and compressed macro blocks is shown below: 6 Hz system for(h=; h<4; h++){ for(s=; s<; s++){ for(k=; k<7; k++){ for(t=; t<5; t++){ a = (4h + s + t + ) mod ; b = (4h + s + t + 6) mod ; c = (4h + s + t + 8) mod ; d = (4h + s + t + ) mod ; e = (4h + s + t + 4) mod ; DBNq = (5t + 5k) mod 5; DSNp = INT((5t + 5k + 675s) / 5); V DBNq, h of DSNp = CM h,a,,k Page of 6 pages

23 SMPTE 7M } } } } V (DBNq + ), h of DSNp = CM h,b,,k V (DBNq + ), h of DSNp = CM h,c,,k V (DBNq + ), h of DSNp = CM h,d,,k V (DBNq + 4), h of DSNp = CM h,e,4,k where DBNq : DIF block number DSNp : DIF sequence number h : Divided block s, t : Vertical order of super block k : Macro block order in super block 5 Hz system for(h=; h<4; h++){ for(k=; k<7; k++){ for(i=; i<; i++){ a = (4h + i + ) mod ; b = (4h + i + 6) mod ; c = (4h + i + 8) mod ; d = (4h + i + ) mod ; e = (4h + i + 4) mod ; DBNq = (5i + 55k) mod 5; DSNp = INT((5i + 55k) / 5); V DBNq, h of DSNp = CM h,a,,k V (DBNq + ), h of DSNp = CM h,b,,k V (DBNq + ), h of DSNp = CM h,c,,k V (DBNq + ), h of DSNp = CM h,d,,k V (DBNq + 4), h of DSNp = CM h,e,4,k } } } for(k=; k<7; k++){ DBNq = 5k; DSNp = ; } where V DBNq, of DSNp = CM,,,k V (DBNq + ), of DSNp = CM,,,k V (DBNq + ), of DSNp = CM,,,k V (DBNq + ), of DSNp = CM,,,k V (DBNq + 4), of DSNp = CM,,4,k DBNq : DIF block number DSNp : DIF sequence number h : Divided block i : Vertical order of super block k : Macro block order in super block Page of 6 pages

24 SMPTE 7M Table - Video DIF blocks and compressed macro blocks for the 6 Hz system DIF channel number DIF sequence number DIF block Compressed macro block V, CM,,, V, CM,6,, V, CM,8,, V, CM,,, V 4, CM,4,4, : : : : : 9 : : V 4, CM,,4,6 V, CM,6,, V, CM,,, V, CM,,, V, CM,4,, V 4, CM,8,4, : : : : : 9 : : V 4, CM,7,4,6 : : : : V, CM,4,, V, CM,8,, V, CM,,, V, CM,,, V 4, CM,6,4, : : : : : 9 : : V 4, CM,5,4,6 Page 4 of 6 pages

25 SMPTE 7M Table - Video DIF blocks and compressed macro blocks for the 5 Hz system DIF channel number DIF sequence number DIF block Compressed macro block V, CM,,, V, CM,6,, V, CM,8,, V, CM,,, V 4, CM,4,4, : : : : : : : V 4, CM,,4,6 V, CM,,, V, CM,,, : : V 4, CM,,4,6 V, CM,6,, V, CM,,, V, CM,,, V, CM,4,, V 4, CM,8,4, : : : : : : : V 4, CM,7,4,6 V, : : V 4, : : : : V, CM,,, V, CM,7,, V, CM,9,, V, CM,,, V 4, CM,5,4, : : : : : : : V 4, CM,4,4,6 V, : : V 4, Page 5 of 6 pages

26 SMPTE 7M 4 Video compression This clause includes video compression processing for the 8/6i system, the 8/5i system, and the 7/6p system. 4. Video structure 4.. Video Sampling structure The video sampling structure is defined by SMPTE 74M for the 8 line system, and SMPTE 96M for the 7 line system. The construction of luminance (Y) and two color difference signals (CR, CB) is described in table 4. A sample conversion from -bit input video to 8bit s or more is provided by the resampling process (the first processing block of figure ) Video Frame Pixel Structure 8/6i system The sampling starting point of Y signal shall be 9T from the horizontal sync timing reference. Where T =. / (74.5 x 6 ) sec 9 pixels of luminance and 96 pixels of each color difference signal per line shall be transmitted as shown in figure. The sampling starting point in the active period of CR and CB signals shall be the same as the sampling starting point in the active period of the Y signal. Each pixel shall be converted to the code of twos complement (-58 to 57) by inverting the MSB of the input video signal. 8/5i system The sampling starting point of Y signal shall be 9T from the horizontal sync timing reference. Where T = / (74.5 x 6 ) sec 9 pixels of luminance and 96 pixels of each color difference signal per line shall be transmitted as shown in figure. The sampling starting point in the active period of CR and CB signals shall be the same as the sampling starting point in the active period of the Y signal. Each pixel shall be converted to the code of twos complement (-58 to 57) by inverting the MSB of the input video signal. 7/6p system The sampling starting point of Y signal shall be 6T from the horizontal sync timing reference. Where T =. / (74.5 x 6 ) sec 8 pixels of luminance and 64 pixels of each color difference signal per line shall be transmitted as shown in figure. The sampling starting point in the active period of CR and CB signals shall be the same as the sampling starting point in the active period of the Y signal. Each pixel shall be converted to the code of twos complement (-58 to 57) by inverting the MSB of the input video signal Video Frame Line Structure 8 line system 54 lines for Y, CR and CB signals from each field shall be transmitted. The transmitted lines in each two fields are described in table 4. 7 line system 7 lines for Y, CR and CB signals from each video frame shall be transmitted. The transmitted lines in each video frame are described in table Horizontal Re-sampling 8/6i system 9 horizontally sampled Y signals shall be re-sampled to 8 pixels. The 96 horizontally sampled CR and CB signals shall be re-sampled to 64 pixels. The output signal of the re-sampler shall have a sample resolution equal to 8 bits or more. (See annex B) Page 6 of 6 pages

27 SMPTE 7M 8/5i system 9 horizontally sampled Y signals shall be re-sampled to 44 pixels. The 96 horizontally sampled CR and CB signals shall be re-sampled to 7 pixels. The output signal of the re-sampler shall have a sample resolution equal to 8 bits or more. (See annex B) 7/6p system The 8 horizontally sampled Y signals shall be re-sampled to 96 pixels. The 64 horizontally sampled CR and CB signals shall be re-sampled to 48 pixels. The output signal of the re-sampler shall have a sample resolution equal to 8 bits or more. (See annex B) Table 4 - Construction of input video 8/6i system 8/5i system 7/6p system Sampling frequency Y 74.5 /. MHz 74.5 MHz 74.5 /. MHz CR, CB 7.5 /. MHz 7.5 MHz 7.5 /. MHz Total number of pixels per line Y 65 CR, CB 85 The number of active pixels per line Y 9 8 CR, CB Total number of lines per video frame 5 75 The number of active lines per video frame 8 7 The active line numbers Field to 56 Field 584 to 6 to 745 Quantization Each sample is linearly quantized to bits for Y, CR and CB. Scale 4 to 9 The relation between video signal Video signal level of white: 94 Y level and quantized level Video signal level of black: 64 Quantized level 877 CR, CB Video signal level of gray: 5 Quantized level 897 Page 7 of 6 pages

28 SMPTE 7M Input Luminance (Y) T First active line in a field line line 584 Output Luminance (Y) First active line in a field T line line 585 line line 584 line line 585 Input Color difference (CR, CB) First active line in a field Output Color difference (CR, CB) First active line in a field T T line line 584 line line 585 line line 584 line line 585 T =./74.5µs First pixel in active period Figure - Sampling structure for the 8/6i system Page 8 of 6 pages

29 SMPTE 7M Input Luminance (Y) T First active line in a field line line 584 Output Luminance (Y) First active line in a field 4 T line line 585 line line 584 line line 585 Input Color difference (CR, CB) First active line in a field Output Color difference (CR, CB) First active line in a field T 8 T line line 584 line line 585 line line 584 line line 585 T = /74.5µs First pixel in active period Figure - Sampling structure for the 8/5i system Page 9 of 6 pages

30 SMPTE 7M Input Luminance (Y) T First active line in a frame line 6 line 7 Output Luminance (Y) First active line in a frame 4 T line 8 line 9 line 6 line 7 line 8 line 9 Input Color difference (CR, CB) First active line in a frame Output Color difference (CR, CB) First active line in a frame T 8 T line 6 line 7 line 8 line 9 line 6 line 7 line 8 line 9 T =./74.5µs First pixel in active period Figure - Sampling structure for the 7/6p system 4.. DCT block The Y, CR and CB pixels in each video frame shall be divided into DCT blocks as shown in figure for the 8 line system, and figure 4 for the 7 line system. DCT blocks are structured with a rectangular area of eight vertical pixels and eight horizontal pixels in a video frame. The value of x shows the horizontal coordinate from the left and the value of y shows the vertical coordinate from the top. For the 8 line system, even lines of y =,, 4, 6 are the horizontal lines of field one, and odd lines of y =,, 5, 7 are those of field two. DCT block arrangement in each video frame Page of 6 pages

31 SMPTE 7M 8/6i system The arrangement of horizontal DCT blocks in each video frame is shown in figure 5. The same horizontal arrangement is repeated to 5 DCT blocks in the vertical direction. Pixels in one video frame are divided into 4 DCT blocks. Y : 5 Vertical DCT blocks x 6 horizontal DCT blocks = 6 DCT blocks CR : 5 vertical DCT blocks x 8 horizontal DCT blocks = 8 DCT blocks CR : 5 vertical DCT blocks x 8 horizontal DCT blocks = 8 DCT blocks 8/5i system The arrangement of horizontal DCT blocks in each video frame is shown in figure 6. The same horizontal arrangement is repeated to 5 DCT blocks in the vertical direction. Pixels in one video frame are divided into 486 DCT blocks. Y : 5 Vertical DCT blocks x 8 horizontal DCT blocks = 4 DCT blocks CR : 5 vertical DCT blocks x 9 horizontal DCT blocks = 5 DCT blocks CR : 5 vertical DCT blocks x 9 horizontal DCT blocks = 5 DCT blocks 7/6p system The arrangement of horizontal DCT blocks in each video frame is shown in figure 7. The same horizontal arrangement is repeated to 9 DCT blocks in the vertical direction. Pixels in one video frame are divided into 6 DCT blocks. Y: 9 vertical DCT blocks x horizontal DCT blocks = 8 DCT blocks CR: 9 vertical DCT blocks x 6 horizontal DCT blocks = 54 DCT blocks CR: 9 vertical DCT blocks x 6 horizontal DCT blocks = 54 DCT blocks 4.. Macro block Each macro block consists of eight DCT blocks. Figure 8 for the 8 line system and figure 9 for the 7 line system show the relationship between macro block and DCT blocks Arrangement of macro block 8/6i system Macro block arrangement in each video frame has two steps. Step : Arranging macro blocks Pixels in each video frame are divided into 54 macro blocks as shown in figure. Each macro block except the bottom macro blocks consists of four DCT blocks of Y which are horizontally and vertically adjacent, two vertically adjacent DCT blocks of CR and two vertically adjacent DCT blocks of CB on a TV screen. Where, 67 vertical macro blocks x 8 horizontal macro blocks = 56 macro blocks. Each bottom macro block consists of four horizontally adjacent DCT blocks of Y, two horizontally adjacent DCT blocks of CR and two horizontally adjacent DCT blocks of CB on a TV screen. Where, vertical macro blocks x 4 horizontal macro blocks = 4 macro blocks. Step : Rearranging macro blocks Sets consisting of 4 macro blocks which are named A to A7 and sets consisting of macro blocks which are named A8 to A5 are arranged as shown in figure. Page of 6 pages

32 SMPTE 7M 4 macro blocks in A6 are arranged into 4 vertical macro blocks x horizontal macro blocks in B6 respectively as shown in figure. Where, 6 vertical macro blocks x 9 horizontal macro blocks = 54 macro blocks 8/5i system Macro block arrangement in each video frame has two steps. Step : Arranging macro blocks Pixels in each video frame are divided into 675 macro blocks as shown in figure. Each macro block except the bottom macro blocks consists of four DCT blocks of Y which are horizontally and vertically adjacent, two vertically adjacent DCT blocks of CR and two vertically adjacent DCT blocks of CB on a TV screen. Where, 67 vertical macro blocks x 9 horizontal macro blocks = 6 macro blocks. Each bottom macro block consists of four horizontally adjacent DCT blocks of Y, two horizontally adjacent DCT blocks of CR and two horizontally adjacent DCT blocks of CB on a TV screen. Where, vertical macro blocks x 45 horizontal macro blocks = 45 macro blocks. Step : Rearranging macro blocks Macro blocks are divided into a main unit and an edge unit. The edge unit contains top macro blocks in A and bottom macro blocks in A as shown in figure. The main unit contains the remaining blocks. Where, main unit: 66 vertical macro blocks x 9 horizontal macro blocks = 594 macro blocks edge unit: vertical macro blocks x 5 horizontal macro blocks = 5 macro blocks 7/6p system Pixels in each video frame are divided into 7 macro blocks as shown in figure. Where, 45 vertical macro blocks x 6 horizontal macro blocks = 7 macro blocks 4... Divided blocks 8/6i system Macro blocks in each video frame are divided into halfway blocks as shown in Figure. Each halfway block H consists of nine macro blocks horizontally and one macro block vertically. Halfway blocks H are distributed into divided blocks as follows: Divided blocks: h= : H m,n h= : H m,n+ h= : H m+,n h= : H m+,n+ Where, m=,,,...,9 n=,,,,4 As a result, one video frame is divided into four divided blocks. Each divided block consists of vertical macro blocks x 45 horizontal macro blocks. Page of 6 pages

33 SMPTE 7M 8/5i system Macro blocks in the main unit are divided into halfway blocks as shown in Figure 4. Each halfway block H consists of nine horizontally adjacent macro blocks. Halfway blocks H are distributed into divided blocks as follows: Divided blocks: h= : H m,n h= : H m,n+ h= : H m+,n h= : H m+,n+ Where, m=,,,..., n=,,,,4 As a result, the main unit is divided into four divided blocks. Each divided block is consists of vertical macro blocks x 45 horizontal macro blocks. 7/6p system Macro blocks in each video frame are divided into halfway blocks as shown in Figure 5. Each halfway block H consists of six macro blocks horizontally and one macro block vertically. Halfway blocks H are distributed into divided blocks as follows bellow: Divided blocks: h= : H m, n h= : H m, n+ h= : H m+45, n h= : H m+45, n+ Where, m=,,,...,44 n=,,,,4 As a result, each two video frames are divided into four divided blocks. Each divided block is consists of 45 vertical macro blocks x horizontal macro blocks. Top y Bottom Left,,,, 4, 5, 6, 7,,,,, 4, 5, 6, 7,,,,, 4, 5, 6, 7,,,,, 4, 5, 6, 7,,4,4,4,4 4,4 5,4 6,4 7,4,5,5,5,5 4,5 5,5 6,5 7,5,6,6,6,6 4,6 5,6 6,6 7,6,7,7,7,7 4,7 5,7 6,7 7,7 x Right Pixel x = 6 y = 7 Field Field Field Field Field Field Field Field Figure - DCT block and the pixel coordinates for the 8 line system Page of 6 pages

34 SMPTE 7M Top Left x Right,,,, 4, 5, 6, 7,,,,, 4, 5, 6, 7,,,,, 4, 5, 6, 7, y,,,, 4, 5, 6, 7,,4,4,4,4 4,4 5,4 6,4 7,4,5,5,5,5 4,5 5,5 6,5 7,5 Bottom,6,6,6,6 4,6 5,6 6,6 7,6,7,7,7,7 4,7 5,7 6,7 7,7 Pixel x = 6 y = 7 Figure 4 - DCT block and the pixel coordinates for the 7 line system Luminance DCT block Left 6 DCT blocks Right Top Color difference DCT block 8x8 pixels Left 8 DCT blocks Right Top Figure 5 - DCT block arrangement for the 8/6i system Luminance DCT block Left 8 DCT blocks Right Top Color difference DCT block 8x8 pixels Left 9 DCT blocks Right Top Figure 6 - DCT block arrangement for the 8/5i system Page 4 of 6 pages

35 SMPTE 7M Luminance DCT block Left DCT blocks Right Top Color difference DCT block 8x8 pixels Left 6 DCT blocks Right Top Figure 7 - DCT block arrangement for the 7/6p system Top Bottom CB CR Y DCT DCT Left DCT DCT Right DCT4 DCT5 DCT6 DCT7 Left DCT4 DCT5 DCT6 CB CR Y DCT DCT DCT DCT Bottom macro block Right DCT7 Figure 8 - Macro block and DCT blocks for the 8 line system Top CB CR Y DCT DCT DCT4 DCT5 DCT DCT Bottom Left Right DCT6 DCT7 Figure 9 - Macro block and DCT blocks for the 7 line system Page 5 of 6 pages

36 SMPTE 7M Step: Arranging macro blocks macro blocks A A A A A4 A5 A6 A7 4 macro blocks 6 macro blocks A8 A9 A A A A A4 A5 A6 macro blocks macro block Bottom macro blocks Step: Rearranging macro blocks 9 macro blocks 6 macro blocks A A A A A4 A5 A6 A7 A8 A9 A A A A A4 A5 B6 4 macro blocks 4 macro blocks 4 macro blocks 4 macro blocks 4 macro blocks 4 macro blocks 4 macro blocks 4 macro blocks macro blocks macro blocks macro blocks macro blocks macro blocks macro blocks macro blocks macro blocks 4 macro blocks macro blocks Rearranging A6 to B6 A6 B Figure - Arrangement of macro blocks for the 8/6i system Page 6 of 6 pages

37 SMPTE 7M Step: Arranging macro blocks 9 macro blocks A macro block 66 macro blocks Bottom macro blocks A 45 macro blocks macro block Step: Rearranging macro blocks main unit 9 macro blocks 66 macro blocks edge unit 9 macro blocks 45 macro blocks A A macro block Figure - Arrangement of macro blocks for the 8/5i system Page 7 of 6 pages

38 SMPTE 7M 6 macro blocks 45 macro blocks Figure - Arrangement of macro blocks for the 7/6p system Page 8 of 6 pages

39 SMPTE 7M 9 macro blocks H, H, H, H, H, H, H, H, H, H,9 H,9 H,9 macro block macro block macro block 6 macro blocks H59, H59, H59, H59,9 macro block macro blocks 45 macro blocks 45 macro blocks H, H, H,8 H, H, H,9 macro blocks H, H, H,8 macro blocks H, H, H,9 H58, H58, H58,8 H58, H58, H58,9 divided block h= divided block h= 45 macro blocks 45 macro blocks H, H, H,8 H, H, H,9 macro blocks H, H, H,8 macro blocks H, H, H,9 H59, H59, H59,8 H59, H59, H59,9 divided block h= divided block h= Figure Divided blocks for the 8/6i system Page 9 of 6 pages

40 SMPTE 7M main unit 9 macro blocks H, H, H, H, H, H, H, H, H, H,9 H,9 H,9 macro block macro block macro block 66 macro blocks H65, H65, H65, H65,9 macro block macro blocks 45 macro blocks 45 macro blocks H, H, H,8 H, H, H,9 macro blocks H, H, H,8 macro blocks H, H, H,9 H64, H64, H64,8 H64, H64, H64,9 divided block h= divided block h= 45 macro blocks 45 macro blocks H, H, H,8 H, H, H,9 macro blocks H, H, H,8 macro blocks H, H, H,9 H65, H65, H65,8 H65, H65, H65,9 divided block h= divided block h= Figure 4 Divided blocks for the 8/5i system Page 4 of 6 pages

41 SMPTE 7M 6 macro blocks 6 macro blocks H, H, H, H, H, H, H,9 H,9 macro block H45, H45, H45, H46, H46, H46, H45,9 H46,9 macro block 45 macro blocks 45 macro blocks H44, H44, H44, H44,9 H89, H89, H89, H89,9 6 macro blocks 6 6 Video frame 6 6 macro blocks 6 6 Video frame 6 macro blocks macro blocks H, H, H,8 H, H, H,9 45 macro blocks H, H, H,8 45 macro blocks H, H, H,9 H44, H44, H44,8 H44, H44, H44,9 divided block h= divided block h= macro blocks macro blocks H45, H45, H45,8 H45, H45, H45,9 45 macro blocks H46, H46, H46,8 45 macro blocks H46, H46, H46,9 H89, H89, H89,8 H89, H89, H89,9 divided block h= divided block h= Figure 5 Divided blocks for the 7/6p system Page 4 of 6 pages

42 SMPTE 7M 4..4 Super block Each super block consists of 7 macro blocks. 8/6i system The arrangement of super blocks in a divided block is shown in figure 6. The pixels in a divided block are divided into 5 super blocks. vertical super blocks x 5 horizontal super blocks = 5 super blocks. 8/5i system The arrangement of super blocks in a divided block is shown in figure 8. The pixels in a divided block are divided into 55 super blocks. vertical super blocks x 5 horizontal super blocks = 55 super blocks. The pixels in the edge unit are divided into 5 super blocks. vertical super blocks x 5 horizontal super blocks = 5 super blocks. 7/6p system The arrangement of super blocks in a divided block is shown in figure. The pixels in a divided block are divided into 5 super blocks. vertical super blocks x 5 horizontal super blocks = 5 super blocks Definition of super block number, macro block number and value of the pixel Super block number Super block number is expressed as S h,i,j shown in figures 6, 8, and. S h,i,j Where h: the divided block h =,, i: the vertical order of the super block i =,, 9 for 6Hz system i =,, for 5Hz system j: the horizontal order of the super block j =,, 4 Macro block number The macro block number is expressed as M h,i,j,k. The symbol k is the macro block order in the super block shown in figure 7 for the 8/6i system, figure 9 for the 8/5i system, and figure for the 7/6p system. The small rectangle in these figures shows a macro block, and a number in the small rectangle expresses k. M h,i,j,k Where h,i, j: the super block number k: the macro block order in the super block k =,,6 Pixel location Pixel location is expressed as P h,i,j,k,l(x,y). The pixel is indicated as the suffix of h, i, j, k, l (x, y). The symbol l is the DCT block order in a macro block shown in figures 8 and 9. The rectangle in the figure shows a DCT block, and a DCT number in the rectangle expresses I. The symbol x and y are the pixel coordinate in the DCT block as described in 4... P h,i,j,k,l(x,y) Where h,i, j, k: the macro block number l: the DCT block order in the macro block (x, y): the pixel coordinate in the DCT block x =,, 7 y =,, 7 Page 4 of 6 pages

43 SMPTE 7M Top Left j Right 4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 macro blocks Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 4 Sh,4, Sh,4, Sh,4, Sh,4, Sh,4,4 5 Sh,5, Sh,5, Sh,5, Sh,5, Sh,5,4 i 6 7 Sh,6, Sh,6, Sh,6, Sh,6, Sh,6,4 Sh,7, Sh,7, Sh,7, Sh,7, Sh,7,4 8 Sh,8, Sh,8, Sh,8, Sh,8, Sh,8,4 9 Bottom Sh,9, Sh,9, Sh,9, Sh,9, Sh,9,4 Super block i=9 j= 9 macro blocks Figure 6 - Super blocks and macro blocks in a divided block for the 8/6i system Super block Sh,i,j (h=,...,, i=,...,9, j=,...,4) k Figure 7 - Macro block order in a super block for the 8/6i system Page 4 of 6 pages

44 SMPTE 7M divided block Top Left j Right 4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,4, Sh,4, Sh,4, Sh,4, Sh,4,4 Sh,5, Sh,5, Sh,5, Sh,5, Sh,5,4 Sh,6, Sh,6, Sh,6, Sh,6, Sh,6,4 macro blocks i Sh,7, Sh,7, Sh,7, Sh,7, Sh,7,4 Sh,8, Sh,8, Sh,8, Sh,8, Sh,8,4 Sh,9, Sh,9, Sh,9, Sh,9, Sh,9,4 edge unit Bottom Sh,, Sh,, Sh,, Sh,, Sh,,4 Super block i= j= 9 macro blocks S,, S,, S,, S,, S,,4 Figure 8 - Super blocks and macro blocks for the 8/5i system Super block Sh,i,j (h=,...,, i=,...,, j=,...,4) k Super block S,,j (j=,...,4)... 6 Figure 9 - Macro block order in a super block for the 8/5i system Page 44 of 6 pages

45 SMPTE 7M Top Left j Right 4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 Sh,, Sh,, Sh,, Sh,, Sh,,4 4 Sh,4, Sh,4, Sh,4, Sh,4, Sh,4,4 5 Sh,5, Sh,5, Sh,5, Sh,5, Sh,5,4 i 6 7 Sh,6, Sh,6, Sh,6, Sh,6, Sh,6,4 Sh,7, Sh,7, Sh,7, Sh,7, Sh,7,4 8 Sh,8, Sh,8, Sh,8, Sh,8, Sh,8,4 9 Bottom Sh,9, Sh,9, Sh,9, Sh,9, Sh,9,4 Super block i = 9 j = Super block = 7 macro blocks Figure - Super blocks and macro blocks in a divided block for the 7/6p system Super block Sh,i,j (h=,...,, i=,...,9, j=,...,4) k Figure - Macro block order in a super block for the 7/6p system Page 45 of 6 pages

46 SMPTE 7M 4..6 Definition of video segment and compressed macro block A video segment consists of five macro blocks which are assembled from various areas within the video frame. 6 Hz system 5 Hz system divided block edge unit M h,a,p,k where a = (i + ) mod, p = M h,b,q,k where b = (i + 6) mod, q = M h,c,r,k where c = (i + 8) mod, r = M h,d,s,k where d = (i + ) mod, s = M h,e,t,k where e = (i + 4) mod, t = 4 Where h: the divided block h =,, i: the vertical order of the super block i =,, 9 k: the macro block order in the super block k =,, 6 M h,a,p,k where a = (i + ) mod, p = M h,b,q,k where b = (i + 6) mod, q = M h,c,r,k where c = (i + 8) mod, r = M h,d,s,k where d = (i + ) mod, s = M h,e,t,k where e = (i + 4) mod, t = 4 Where h: the divided block h =,, i: the vertical order of the super block i =,, k: the macro block order in the super block k =,, 6 M h,a,p,k where h =, a =, p = M h,b,q,k where h =, b =, q = M h,c,r,k where h =, c =, r = M h,d,s,k where h =, d =, s = M h,e,t,k where h =, e =, t = 4 Where k: the macro block order in the super block k =,, 6 Each video segment before the bit rate reduction is expressed as V h,i,k which consists of M h,a,p,k; M h,b,q,k; M h,c,r,k; M h,d,s,k; and M h,e,t,k. The bit-rate reduction process is operated sequentially from M h,a,p,k to M h,e,t,k. The data in a video segment are compressed and transformed to a 85-byte data stream. A set of compressed video data consists of five compressed macro blocks. Each compressed macro block consists of 77 bytes and is expressed as CM. Each video segment after the bit-rate reduction is expressed as CV h,i,k which consists of CM h,a,p,k; CM h,b,q,k; CM h,c,r,k; CM h,d,s,k; and CM h,e,t,k as shown below: CM h,a,p,k : This block includes all parts or most parts of the compressed data from macro block M h,a,p,k and may include the compressed data of macro block M h,b,q,k; or M h,c,r,k; or M h,d,s,k; or M h,e,t,k. Page 46 of 6 pages