ISDB-T
Technology overview
The Japanese answer to digital terrestrial TV is "terrestrial integrated services cigital broadcasting" (ISDB-T). The standard of the same name was adopted in 1999. ISDB-T uses coded orthogonal frequency division multiplexing (COFDM) in the 2k, 4k and 8k modes. The RF signal in the 6 MHz bandwidth channel is divided into 13 segments. Owing to this segment concept, wideband and narrowband transmission can be implemented. ISDB-T is used in Japan.
Key Parameters
| ISDB-T | |
|---|---|
| Frequency | 470 MHz
- 862
MHz
558 MHz - 566 MHz Channel 32 (VHF) |
| Modulation |
DQPSK, QPSK, 16QAM, 64QAM COFDM (13-segments) |
| Bandwidth | 6/ 7/ 8 MHz (5,57 MHz) |
| Data Rate | 0.28 Mbit/s - 1.787 Mbit/s per segment, 13 segments in total |
| Max. Speed | 800 km/h
(2K) 400 km/h (4K) 200 km/h (8K) |
| Cell Radius | trial distance of 9 km |
| Video Source Coding | MPEG-2, MPEG-4, H.264 |
