Digital Terrestrial Broadcasting: Challenges In Its Implementation

Transcription

1 Digital Terrestrial Broadcasting: Challenges In Its Implementation Paulo September 232 rd,2005 Yoshiki Maruyama Executive Engineer tv asahi corporation asahi.co.jp

2 Contents Profile of tv asahi National Digitalization Implementation Applications Conclusion 2

3 Profile of tv asahi 3

4 Who is tv asahi? Japan has five private broadcasting networks. tv asahi is a key station with a network of 23 local affiliates. 4

5 tv asahi s National TV Network 24-station national network Hokkaido Television Broadcasting Asahi Broadcasting Aomori Akita Asahi Broadcasting Yamagata Television System Iwate Asahi TV Higashinippon Broadcasting Kyushu Asahi Broadcasting Yamaguchi Asahi Broadcasting Nagasaki Culture Telecasting Kumamoto Asahi Broadcasting Hiroshima Home Television Ehime Asahi Television Oita Asahi Broadcasting Kagoshima Broadcast Asahi Broadcasting Setonaikai Broadcasting Hokuriku Asahi Broadcasting Nagoya Broadcasting Network Niigata Television Network 21 Asahi Broadcasting Nagano Shizuoka Asahi Television Ryukyu Asahi Broadcasting Fukushima Broadcasting tv asahi Corp 5

6 tv asahi s strength tv asahi s s strength consists of (A) News and Information, (B) Live Sports Coverage, (C) Variety/Entertainment, Programming. 6

7 National Digitalization 7

8 Advertising X day is July27 th,2011. In 6 years time, all TV sets will become digital! 8

9 National Digitalization schedule First Phase: Dec,2003 Digital transmission in Tokyo, Osaka and Nagoya areas commenced. Second phase: By Dec,2006 Transmission in the remaining areas must be executed. Final phase: July,2011 Analogue broadcast shall be terminated. 9

10 Expansion Schedule Digital terrestrial television broadcasting has already commenced. already began began in Jun will begin by Dec will begin by Oct will begin by Dec

11 Households Coverage Households Coverage (percentage of households which can receive DTTB) increases every year as shown below. In December 2004: 18 million households (38%) In December 2005: 27 million households (56%) In December 2006: 37 million households (77%) 48 million households in Japan. 11

12 Challenge tv asahi, along with other public and commercial networks, will undergo digitalization process due for completion by

13 Implementation 13

14 Move to the new site tv asahi s s Head Quarter moved to new site Roppongi hills from Ark Hills premise on Mar.2003 to secure space to install new digital facilities in addition to the analogue facilities and to commence Digital broadcasting on Dec. 1 st, Mar31 st.2003 Roppongi Hills Ark Hills 14

15 Construction of the new building tv asahi has installed full digital broadcasting systems for Analogue & Digital terrestrial television broadcasting 15 at new building.

16 Master control systems During the simulcast period (until( July24,2011), Master control system operates both Analog and Digital television programs simultaneously. 16

17 Digital SNG Digital SNG enables to send 2 HD or 4 SD programme within a 36MHz bandwidth transponder. within a 36MHz bandwidth Ku Antenna transponder. 6.4mφ x2 C Band Antenna 3.6mφ 1GHz IF 1GHz IF 1GHz IF E/O Radio room O/E 1GHz IF 1GHz IF SDTV IRD-1 SDTV IRD-2 SDTV IRD-3 SDTV IRD-4 IRD SDTV IRD-5 SDTV IRD-6 SDTV IRD-7 SDTV IRD-8 SNG-SDTV(RX) Cont&Mon D&S center TVRO HDTV IRD-1 HDTV IRD-2 HDTV IRD-3 Cont&Mon SNG-HDTV(RX) 1GHz IF International IRD-1 International IRD-2 International IRD-3 International IRD-4 Cont&Mon SNG-International(RX) 140MHz IF x3 SDTV EXC-1 SDTV EXC-2 SDTV EXC-3 SDTV EXC-4 Cont&Mon SNG-SDTV(TX) HDTV COD-1 SNG-HDTV(TX) Cont&Mon SNG cont & monitor Cont&Mon Cont&Mon Overall cont & monitor Distribution &satellite center 17

18 Digital SNG Transponder allocation for Digital Satellite News Gathering OBO 0dB 10dB 20dB 30dB 40dB OBO:[13dB] OBO:[29dB] OBO:[25dB] Digital /36MHz Bandwidth (K1~K12) Ch1 Ch2 Ch3 Ch4 OBO:[31dB] QPSK/8PSK SMOK ch1[if:128.00(f )mhz] MCPC1[IF:123.25(F )MHz] MCPC2[IF:123.00(F )MHz] MCPC3[IF:122.75(F )MHz] MCPC4[IF:122.50(F )MHz] DATA[IF:122.30(F )MHz] PTT[IF:122.20(F )MHz] ID[IF:122.10(F )MHz] OBO 0dB 10dB 20dB 30dB 40dB OBO:[13dB] OBO:[29dB] OBO:[25dB] UATキャリア [IF:140.75(F0+0.75)MHz] トラホ ンセンター [IF:140.00(F0)MHz] ch2[if:136.50(f0-3.50)mhz] Digital /27MHz Bandwidth (K13~K28) OBO:[31dB] ch3[if:145.00(f0+5.00)mhz] Ch1 Ch2 Ch3 ch4[if:153.50(f )mhz] トラホ ンエッシ [IF:158.00(F )MHz] トラホ ンエッシ [F MHz] OBO 0dB OBO:[6dB] 10dB ch1[if:132.50(f0-7.50)mhz] MCPC1[IF:127.75(F )MHz] MCPC2[IF:127.50(F )MHz] MCPC3[IF:127.25(F )MHz] DATA[IF:126.80(F )MHz] PTT[IF:126.70(F )MHz] ID[IF:126.60(F )MHz] ch3[if:149.25(f0+9.25)mhz] トラホ ンエッシ [IF:153.50(F )MHz] ch2[if:141.00(f0+1.00)mhz] UATキャリア [IF:140.75(F0+0.75)MHz] トラホ ンセンター [IF:140.00(F0)MHz] Analogue 20dB 30dB 40dB OBO:[29dB] OBO:[26dB] MCPC[IF:57.00(F )MHz] PTT[IF:56.50(F )MHz] ID[IF:56.30(F )MHz] UATキャリア [IF:70.00(F0+1.00)MHz] フ ロク ラム [IF:69.95(F0+0.95)MHz] トラホ ンセンター [IF:69.00(F0)MHz] 18

19 Outdoor Broadcasting OB Track and Van type vehicles must be HD compatible for Digital Terrestrial Broadcasting. tv asahi s flag ship vehicle 201 / HD 101 / Mobile SNG 202 / HD 102 /HD SNG 204 / News 19

20 Digital ENG System parameters for HDTV/SDTV Digital Electronic News Gathering Frequency Band 800 MHz 7 13 GHz Channel spacing 9 18 MHz QPSK/16QAM/32QAM/ QPSK/16QAM/32QAM/ Modulation 64QAM-OFDM 64QAM, QPSK/16QAM/ Digital 32QAM/64QAM-OFDM Capacity Up to 30 (SDTV) Up to 60 (HDTV) Mbit/s Transmit feeder loss (min) 1 db Transmit power (max) 4 (7 for 800MHz) 1.76 (QAM) / 7 (OFDM) dbw EIRP (max) (11 16 for 800 MHz) dbw Receive feeder loss (max) 1 db Receiver IF bandwidth 9 18 MHz Receive noise figure 4 db Receiver thermal noise dbw 20

21 Digital Transmitters and Antennas Transmitters and antennas for digital terrestrial television broadcasting installed at Tokyo Tower in Optical fiber lines x2 STL micro wave 21

22 Transmitters Digital Transmitter system consists of three 5kw transmitters for redundant operation. Output power is 10kW. 22

23 Antennas TV stations were confronted with enormous difficulties as Tokyo tower did not have extra space to mount new digital TV antennas,6 meters in width and 12 meters in height. Digital TV Antennas Special observation deck 23

24 Antennas A A beam pattern synthesis technology realized an omni directional radiation pattern in compact size. plan view Radiation pattern 3 db db 60 cutaway view db 15 db 20 db

25 Service Area Service area is expanding in Tokyo area. Sept. 22 nd, nd nd Stage 700W (eirp=920w) Tokyo Tower Dec.1st,2005 Final Stage 10kW (eirp=48kw) 25

26 Applications 26

27 Applications / HDTV High High Definition Broadcast: European broadcasters have opted for multi- channel strategy. Japanese broadcasters have chosen to take advantages of high definition pictures. Pure HDTV : 16X9 1080i 27

28 Applications / SDTV ISDB-T utilize three different programmes within a 6MHz bandwidth channel. Multi-channel approach is presently positioned as an experimental and back-up option. SD-1 SD-2 SD-3 28

29 Applications / Data broadcasting Data broadcasting is now on service. Weather information News Anytime Results of sports games Information-related TV programmes Players list Other games result Ongoing games Other information Example of soccer game 29

30 Applications / Data broadcasting Current Programme screen Player s list Games schedule Notification of Data broadcasting. Other games results Top menu of soccer game Data 30

31 Applications / EPG Electronic Program Guide) EPG (Electronic An electronic programme guide (EPG) is a on-screen guide to scheduled broadcast television programmes, allowing a viewer to navigate, select and discover content by time, title, channel, genre, etc, using their remote control. 31

32 Applications / 1 segment service 12 Segments Fixed service tv asahi Bandwidth:5.6MHz ( 1 channel ) HDTV Mobile service (1 segment broadcasting) Mobile internet Communication company Mobile phone with 1 segment TV 32

33 Applications / 1 segment service 1 segment service scheduled to start in Spring Merits: Stable reception in a mobile environment High quality video & audio in a mobile environment. Robustness to noise and multi-pass. 33

34 Conclusion 34

35 Advantages of Digital Broadcast for Advertisers TV will remain the prominent medium of entertainment and information. Strong appeal of flat-panel TV sets and digital features will guarantee terrestrial broadcast s universal access to viewers. 35

36 tv asahi s Digital Terrestrial Business Model Sponsors appetite for television advertising time will remain strong under digitalized environment. Recent trends show that their needs are continuously increasing. Digitalization will expand terrestrial television s s revenue sources. 36

37 Paulo Thank you for your attention! END 37