C8491 C8000 1/17. digital audio modular processing system. 3G/HD/SD-SDI DSP 4/8/16 audio channels. features. block diagram

Transcription

1 features 4 / 8 / 16 channel LevelMagic2 SDI-DSP with level or loudness (ITU-BS / ITU-BS , EBU R128) control 16 channel 3G/HD/SD-SDI de-embedder 16 in 16 de-embedder matrix 16 channel 3G/HD/SD-SDI embedder with video delay video test pattern generator 32 in 16 embedder matrix variable audio delay of 340ms per embedder channel true peak brick wall limiters dBTP threshold remote control via C8702 Frame Controller, GPI/O, http based API or EmBER protocol block diagram 1/17

2 technical specifications VIDEO : Standard : SMPTE 425M 2.97 Gbit 3G-SDI Level A, B SMPTE 292M Gbit HD-SDI SMPTE 259M 270 Mbit SD-SDI Connection : BNC, 75 Ohm, coaxial (SDI through: active loop, re-clocked) Signal Level : 800mV ±10% at 75Ώ Equalisation : 130m (Belden 1694A, 2.97 GHz) 300m (Belden 8281, 270 MHz) Return Loss : >15 db (2.97 GHz) Supported video standards: 3G 1080p 50 SMPTE 425M 3G 1080p60 SMPTE 425M HD 720p 60 SMPTE 296M HD 1080p 30 SMPTE 274M HD 720p 50 SMPTE 296M HD 1080p 25 SMPTE 274M HD 720p 30 SMPTE 296M HD 1080p 24 SMPTE 295M HD 720p 25 SMPTE 296M HD 1035i 60 SMPTE 260M HD 720p 24 SMPTE 296M HD 1080i 60 SMPTE 274M SD 525i/59.94 SMPTE 125M HD 1080i 50 SMPTE 274M SD 625i/50 SMPTE 125M HD 1080i 30 SMPTE 274M all HD-standards are also supported with their 1/1001-frame-rates Video Delay: 0 8 frames for interlaced formats (e.g. 625i50, 1080i59,94) 0 15 frames for progressive formats (e.g. 720p50, 720p60) AUDIO : Standards : SMPTE 272M (SD) / SMPTE 299M (HD) Audio Data Format : 24 Bit, transparent for C-Bit and U-Bit according to AES3 Audio Sample Rate : 48 khz synchronous to video-carrier (SD, HD, 3G) 32 khz... 48kHz asynchronous to video-carrier (HD, 3G) Latency : (de-embedder + embedder) 3G : < 600µsec HD : < 600µsec SD : < 2.0msec Audio Delay : 16 times msec GENERAL : backplane connector : ref. to DIN41612, 64pin, a+b, male power supply : +5V DC power consumption : approx mA dimension : 3RU, 4HP, 160mm depth temperature : 10 C 40 C humidity : 90%, non condensing 2/17

3 location of switches: initial set up ADDRESS : This rotary encoder sets the CAN ID of the. The 16 switch positions are hexadecimal numbers (0x0 to 0xF). The logical CAN address also defines the place of the module icon within the GUI overview. SW2 : #1 OFF internal use and must be set to OFF. #2 OFF internal use and must be set to OFF. #3 OFF internal use and must be set to OFF. #4 ID +16 ON CAN address range is extended by +16 (counting from 0x10 to 0x1F) OFF CAN address range is standard (counting from 0x0 to 0xF) see rotary encoder settings below. INIT Pressing the INIT button during power up will initialize the module parameters to factory default values. 3/17

4 web browser based GUI Set up of all configurations, parameters and functions via a web browser. See also C8702 Frame Controller manual and respective firmware release notes. OVERVIEW The modules overview of a frame (below the display of an example frame) : By simply clicking on the spanner tool symbol you will get the control pages of the and the status window on the left side, which you will also see on mouse over. The entrance to the module setup is the PRESET page: General remark! The is a 16 channel device from the SDI de-embedding / embedding as well as from the audio processing point of view but the number of audio processing channels is optional (4 / 8 / 16). Since all parameters are the same for each channel number version, this manual describes the 16 audio channel processor version. 4/17

5 PRESETS The has 3 banks of Presets. These Presets are divided in three groups. The first group (#1 #16) is for the LevelMagic process, the second group (#17 #32) is for the SDI Embedder / De-Embdder while the third group (#33 #40) is for setup and fail over parameters. The status window at the left hand side shows the names of the active preset : Level Magic Preset / SDI Preset / Setup/Failover Preset. The word modified will appear in line with the preset name, if any preset parameter was changed. 5/17

6 DSP Load Preset Save as Preset # Name Channels stored in presets SDI Setup/Failover all audio parameters for the DSP setup. select a preset by name and press <LOAD NOW> select a preset NV memory number assign the preset a name (up to 16 digits) and press <SAVE NOW> you can select the channels which will be stored in a preset. I.e. you can change the parameters for one 2ch leveler for example without changing the parameters for another one. all parameters for SDI setup all parameters for module setup and the failover block Preset Clipboard Backup Presets to File copy the active preset to a clip board, the data may be used by other modules inside the same frame. creates a backup XML file which may be stored to the PC Restore Presets from File you can select a backup file from the PC and restore the set of presets. 6/17

7 DEVICE Device Name you can assign the module a name (up to 16 digits) FIRMWARE displays the various firmware versions of the components : Controller DSP FPGA SDI Restart Module Initialize and Restore Factory Defaults Backup Settings and Presets to File Restore Settings and Presets from File the module controller the processing DSP the routing and interface for the DSP the firmware of the SDI board <RESTART> performs a warm start (soft reset) <INITIALIZE> restores the factory default values for all parameters of the module including all presets. <BACKUP> will put all active parameters and the content of all presets into an XML file. You may store such file on a PC. you may browse a matching XML file from a PC. <RESTORE> will overwrite all active parameters and the content of the presets with the content of the backup file. 7/17

8 DSP 1 / DSP 2 From here you can control the audio parameters of the function blocks. For detailed explanation of the LevelMagic parameters pls. see the separate document : LevelMagic-2_Parameters_xxyyzz.pdf Bypass "transparent" Link the processing parameters will be bypassed to validate the actual settings. If enabled, the respective Bypass Audio DSP1 (Ch1 - Ch8) or Audio DSP2 (Ch9 - Ch16) soft LED turns red. indicates that a channel pair is in bit transparent mode to let non audio signals (see SETUP) pass. defines the coupling of the control circuits in order to maintain the listening balance for correlated signals or to provide a grouping of the setup parameters for multi channel signals. 8/17

9 Input Input Gain Leveler Loudness Target [enable/disable] [ dB] [enable / disable] turns off Transient Processor as well. Level mode [0-50dBFS] ITU mode [0-50LKFS] EBU mode [0-50LUFS] Time [10, 20, 40sec. / 1, 2, 5, 10, 20, 40min / 1, 2h] Max Gain Freeze Level Transient Processor Max Gain Response Limiter Max True Peak Profile (Leveler, Limiter) Processing Expander Threshold Range [0 40dB] [-20-60dB [0 40dB] Release Mode [0 9] Compressor Reference Level Range [soft, mid, hard] [enable / disable] [0.0-20dBTP] [live, speech, pop, uni, classic] [enable / disable] [-60-20dBFS] [ dB, Gate] [enable / disable] [0-40dBFS] [0 db] Ratio [1 : : 4.0] Processing Proc Status Enable [live, speech, pop, uni, classic] if the average gain of the module is equal or above the Leveler Max Gain for more than 10s the respective Processing Status soft LED turns red. This status information is condensed for all processing channels by the module controller. The frame controller will condense the status information for all processing modules within a frame and may generate a SNMP trap and/or fire a GPO. In this case the SNMP manager may poll the frame for details to see which processing channel sticks. 9/17

10 Expert [enable / disable] The expert mode offers the possibility for manual intervention into the adaptive behavior of the LevelMagic process for critical material. For details pls. see the above mentioned document. Clear Processing History manual or GPI controlled Initial Dynamic Gain Low Level Behavior Processing Threshold Below Threshold Mode [-40 15dB] start value for the LevelMagic process after Clear Processing History [-80-20dB] the threshold from where the processing gain will behave as defined by Below Threshold Mode. [release, hold] returns slowly to 0dB gain change or stays at the Processing Threshold Metering if you click on the Metering icon at the left hand side in the status window, a Java applet opens up. This feature is only available if a Java virtual machine (6.xy or higher) is running on the PC. 10/17

11 FAIL OVER The offers the feature to use pairs of channels in a fail over mode. I.e. if the audio signal fails in the first audio pair, the processor may switch over to the adjacent (e.g. 1/2 >> 3/4) pair. The functions of the four circuits Failover A Failover D are the same. The audio output is the respective first channel pair. The switch will be performed by a cross fade.. Failover A Fail Threshold Fail Wait Fail Return [FIX Ch 01/02, FIX Ch 03/04, AUTO selects the mode of operation [-60-40dBFS] trigger threshold for the fail detector [ sec.] time from detection of an audio loss to the moment of switch over [ sec.] time from the detection of an audio return to the moment of switch back 11/17

12 SETUP On the SETUP page you may set global parameters and you get an overview of the function blocks of the. Loudness Control Mode [Level, ITU-BS (A85:2011, ITU-BS , EBU R128] LeveMagic measurement and processing characteristic SDI Bypass Relay Bypass Relay Wait Time After Power Up On passes the audio signals from De-Embdder to Embedder but leaves the De-Embedder connected to the SDI input. deactivates the bypass relay (NC). This provides a short cut from the SDI-IN to SDI-OUT1 and disconnects the De-Embedder from the SDI input. the time from power up until the bypass relay is engaged. If the power fails, this relay serves as a fail bypass. 12/17

13 Stream Select (3G-B) Bit Transparent SNMP: Input Lost a 3G-SDI signal may have two HD substreams (e.g. for 3-D TV), AKN as 3G-B standard. The radio buttons select between stream 1 or 2 for embedded audio. See SMPTE 425M for details. [off/on/auto] for pairs of input signals it is possible to turn the DSP into bit transparent mode. This allows passing non audio (e.g. Dolby E) signals without disruption. the monitoring function of the physical SDI can be disabled for the SNMP agent to prevent unwanted traps if the module is frequently taken out of service. The SDI status display within the GUI is not affected. DE-EMBEDDER Here you may assign the audio signals from the 16 de-embedded channels to the 16 processing channels. 13/17

14 EMBEDDER From here you can control the Embedder. You may select between the 16 audio channels from the input (De-Embedder) and the 4 signals from the LevelMagic processor. Generate New SDI Audio Structure Generate new Status Bits if there is the need to replace the structure of the Ancillary Audio Data Blocks you can clean the whole area and generate a new structure. This is an important feature to solve issues discovered from time to time with legacy Embedders. If the option is checked, no group will be generated as long as no SDI Out Grx is checked. you can decide whether the AES Channel Status Bits are taken from their source or if you want to generate new ones. The settings are: Format : Professional Audio Mode : Audio Emphasis : None Freq. Mode : Locked Sample Freq. : 48kHz Channel Mode : Not Indicated User Bits : None Auxiliary Bits : 24Bit Audio Word Length : Not indicated 14/17

15 Silence Delay If the embedder detects a non audio signal it will set the Audio Mode to "Other" and will set the Validity bit for the AES stream. mutes the respective audio channel at the embedder side. before the signals are embedded you may engage a delay per mono channel. GENERATOR Generator enabled Test Pattern Video Format the video generator may either be enabled in manual or automatic mode the generator can either generate a 100% Color Bar or a Black Frame. * Automatic if the input has lost the SDI signal, the generator will automatically turn on with the previous input format. If the generator is set to one of the formats above it will turn on immediately with the selected format. Important note! If the generator is on, either in manual or in automatic mode, it operates on an internal quartz reference. The SDI input will be ignored and it is not possible to genlock it to an external reference. 15/17

16 GPI/O Due to its sandwich nature (two modules in one), the has three sets of GPI/Os, the DSP, the SDI and the Setup/Failover GPI/Os. Moreover it offers the function to Bypass the DSP operation, clear the DSP history and control the Failover circuits by control of an external device. GPIs are useful if you want to recall settings remotely (e.g. by presets). The C8k frame can handle 127 different GPIs. You must assign a unique number to the respective function. Such numbers will be generated by the brc8x Broadcast Remote Controller or by a GPI/O interface module. If the receives such a number over the CAN bus, it will for example load the respective preset or it will turn on a bypass function or clear the processing (DSP) history. 16/17

17 GPOs (Tallies) may signal the status of a module through a GPO device. This allows for easy interconnection with more generic monitoring equipment. If an event occurs, the puts the assigned number on the CAN bus so a C8817 GPI/O module or the brc8x may activate their tallies. 17/17