Table of Terrestrial HDTV Transmission Systems
Systems | ATSC 8-VSB | DVB COFDM | ISDB BST-COFDM |
---|---|---|---|
Source coding | |||
Video | Main profile syntax of ISO/IEC 13818-2 (MPEG-2 - video) | ||
Audio | ATSC Standard A/52 (Dolby AC-3) | ISO/IEC 13818-2 (MPEG-2 – layer II audio) and Dolby AC-3 | ISO/IEC 13818-7 (MPEG-2 – AAC audio) |
Transmission system | |||
Channel coding | - | ||
Outer coding | R-S (207, 187, t = 10) | R-S (204, 188, t = 8) | |
Outer interleaver | 52 R-S block interleaver | 12 R-S block interleaver | |
Inner coding | Rate 2/3 trellis code | Punctured convolution code: Rate 1/2, 2/3,3/4, 5/6, 7/8 Constraint length = 7, Polynomials (octal) = 171, 133 | |
Inner interleaver | 12 to 1 trellis code interleaver | Bit-wise interleaving and frequency interleaving | Bit-wise interleaving, frequency interleaving and selectable time interleaving |
Data randomization | 16-bit PRBS | ||
Modulation | 8-VSB and 16-VSB | COFDM QPSK, 16QAM and 64QAM Hierarchical modulation: multi-resolution constellation (16QAM and 64 QAM) Guard interval: 1/32, 1/16, 1/8 & 1/4 of OFDM symbol 2 modes: 2k and 8k FFT |
BST-COFDM with 13 frequency segments DQPSK, QPSK, 16QAM and 64QAM Hierarchical modulation: choice of three different modulations on each segment Guard interval: 1/32, 1/16, 1/8 & 1/4 of OFDM symbol 3 modes: 2k, 4k and 8k FFT |
Read more about this topic: ISDB
Famous quotes containing the words table of, table and/or systems:
“A sigh for every so many breath,
And for every so many sigh a death.
Thats what I always tell my wife
Is the multiplication table of life.”
—Robert Frost (18741963)
“Language was vigorous because, because ... editors usually laid all the cards on the table so as to leave their hands ... free for more persuasive arguments! The citizenry at large retaliated as best they could.”
—State of Utah, U.S. public relief program (1935-1943)
“No civilization ... would ever have been possible without a framework of stability, to provide the wherein for the flux of change. Foremost among the stabilizing factors, more enduring than customs, manners and traditions, are the legal systems that regulate our life in the world and our daily affairs with each other.”
—Hannah Arendt (19061975)