The difference between DMB T and DTMB

DMB-T refers to Tsinghua's DMB-T scheme based on Tsinghua University's service invention patent; The first compulsory national standard in the field of digital TV transmission in China —— National Standard for Digital TV Terrestrial Transmission (GB20600-2006, abbreviated as DTMB). The latter is based on Tsinghua's DMB-T scheme, and the national standard absorbs the characteristic technologies of TIMI scheme of Guangzhou Academy of Sciences and ADTB scheme of Shanghai Jiaotong University, with four main changes: on the basis of C=3780, the option of C= 1 is added; Changing RS and convolution combined error correction coding into LDPC error correction code; Redefining and designing system information; Add frame header format and 4QAM-NR and 32QAM modulation modes. Some of the above changes are public technology, and some of them have been applied for patent protection by Tsinghua University or Shanghai Jiaotong University.