Digital Radio Status in Japan. ISDB-T: Integrated Services Digital Broadcast Terrestrial

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1 Digital Radio Status in Japan ISDB-T: Integrated Services Digital Broadcast Terrestrial Kenwood Corporation Shoichi Suzuki Senior Specialist Advanced Technologies Development Dep. Strategic Technologies Development Center Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 1. Digital Radio History & Specification 1

2 ISDB-T History In Japan, the Digital Broadcast system is formally referred to as ISDB-T. ISDB-T is a series of standards which define digital video and audio services ISDB-T SB is a variation of ISDB-T for Sound Broadcasting The ISDB-T and ISDB-T SB specifications were developed by ARIB (Association of Radio Industries and Businesses) All digital terrestrial TV broadcasts are on UHF band. NHK and Fuji TV were early participants Digital Radio is transmitted on VHF 7 ch. Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 3 ISDB-T Schedule ISDB-T digital TV commercial broadcast has been started on UHF band since the end of ISDB-T SB (1 or 3 segments) test transmission was started on VHF 7 ch. October All analog TV transmission must be switched off by July Existing analog AM and FM broadcasts will not be switched off (no spectrum give-back). Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 4 2

3 ISDB-T System Block Diagram DTV broadcast Channel X Mobile (1 seg) HDTV (12 seg) Data Mux. Mobile (1 seg) HDTV (12 seg) Spectrum Digital Television Mobile Television Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 5 ISDB-T System Overview: Segments The full data multiplex is broken down into segments 1 segment, 3 segment and 12 segment services are defined 1 segment can handle audio and low-bit rate video, suitable for very small (mobile phone) screens 3 segment can handle mid-size (7 ) screens 12 segment can do full-resolution digital television Radio services are a subset of digital television services; 1 segment or 3 segments are defined as digital Radio services ISDB-T SB can carry audio, video and data in any segment ISDB-T SB is permitted only 8 segments total Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 6 3

4 ISDB-T SB System Details RF Bandwidth Modulation Code Rate FFT Size Bit Rate Output RF Power Limit (per segment) 1-seg 430kHz QPSK 1/2 8K (mode 3) 330kbps 300W 3-seg 1.29MHz QPSK 1/2 8K (mode 3) 1.32Mbps 900W Codecs Available Channels AAC+ and H.264 Ch7 ( MHz) AAC+ and H.264 Ch7 ( MHz) Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 7 ISDB-T SB System Details Total bandwidth available is 3.42MHz (that is, 8 segments of 430kHz). Ch.7 ( MHz) are assigned for the ISDB-T SB broadcast channel. Output RF Power was increased to 2.4kW from February (8 segments x 300W per segment). Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 8 4

5 2. Digital Radio Services in Japan Digital Radio Broadcast Program (Tokyo Area) 1 seg 1 seg 1 seg 1 seg 1 seg 3 segments Channel (101) (201) (202) (301) (401) (501) (701) (702) (703) Program NHK ハマセグ / OTTAVA UNIQue DIGIPICO! Suono 3segments digitalbay the RADIO Dolce Contents NHK FM Yokohama TBS Nack 5 ITCHU NIPPON Tokyo FM Provider Radio Corp. Broadcasting Bay Yokohama Bunka Broadcast Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 10 5

6 Digital Radio Products PC Card and USB Type* Handheld PDA Attachment Type Mobile Phone Type* Palmtop Type Boom Box Type Car Stereo Type * Available now Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 11 Digital Radio Coverage in Tokyo km Copyright 2005 KENWOOD All rights reserved. May not be copied or reprinted without prior written approval. 12 6

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