DTMB (which stands for Digital Terrestrial Multimedia Broadcast) is the Digital Terrestrial Television standard adopted in the People’s Republic of China. It is intended for use with both fixed and mobile terminals.
DTMB baseline features
The data transmission technique used by DTMB is TDS-OFDM (short for “Time Domain Synchronuous-OFDM”), which is primarily a multiple-carrier modulation technology, supporting both single-carrier and dual-carrier modulation schemes. The standard is capable of transmitting HDTV ro receivers moving at speeds up to 200 km/h. The standard also supports mobile digital TV service on handhelds, a feature absent from typical digital TV implementations in Europe and America. In addition, the radius of the signal coverage area is 10 km greater than the European norm DVB-T.
It is worth noting that, even though it specifies a data transmission methodology, the standard does not restrict broadcasters to a certain number of video codecs to be used in transmitting digital TV signals. Broadcasters have the discretion to utilize any codec that supports HD video, as well as systems for providing subtitles, Electronic Program Guides and interactive features.
– Wikipedia : http://en.wikipedia.org/wiki/DMB-T/H