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China creates a new DTV standard - TvTechnology

China creates a new DTV standard

The unofficial name is Digital Multimedia Broadcast-Terrestrial/Handheld
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China is about to introduce a long-awaited standard for terrestrial digital television — both fixed and mobile — EETimes reported.

The unofficial name for the Chinese standard is DMB-T/H, for Digital Multimedia Broadcast-Terrestrial/Handheld. It will serve the world's market for TVs and mobile phones.

DMB-T/H is an outgrowth of work at Tsinghua University in Beijing and Jiaotong University in Shanghai, each of which had hoped to provide the sole technology, but neither of which had the technical or political muscle to achieve that goal, EETimes said.

The result, the report said, is less a combination of their work than a coexistence of two modulation schemes-Tsinghua's time-domain synchronous orthogonal frequency-division multiplexing (OFDM) and Jiaotong's vestigial sideband (VSB) modulation.

Lin Yang, president of Legend Silicon, a Fremont, CA-,based company closely affiliated with Tsinghua University, explained to EETimes that like the 802.16 standard, China's new digital TV standard has both a single-carrier and a multi-carrier option.

China will deploy digital TV over VHFIII and UHF spectrum ranges, using 8MHz channels. Jiaotong's portion of the standard is called ADTB-T, for Advanced Digital Television Broadcast-Terrestrial. Like the U.S. DTV standard, ATSC 8-VSB, it is based on single-carrier frequency.