Digital Terrestrial Media Broadcast (DTMB) is a Chinese standard for digital broadcasting. Unlike CMMB, it is intended for fixed terminals and supports HDTV transmission. It will replace the analog TV transmission in China. Data rates of up to 32 Mbit/s are supported.
The standard defines three LDPC codes of the same block length. The forward error correction uses an outer BCH decoder. A specialty of the defined codes is the submatrix size of 127. This is a prime number that has some negative influence on an efficient hardware decoder realization.
|Framing structure, channel coding and modulation for digital television terrestrial broadcasting system|
|Organization||SAC (Standardization Administration of China)|
|Applications||Digital Broadcast (terrestrial / handheld)|
|Block Length||Submatrix Size||Code Rates|
|7493||127||2/5, 3/5, 4/5|