Television – Bandwidth reduction system – Format type
Patent
1996-04-09
1998-11-24
Peng, John K.
Television
Bandwidth reduction system
Format type
348571, 348607, 348720, 371 437, 371 434, 375340, 375265, H04N 521
Patent
active
058414789
ABSTRACT:
An adaptive trellis decoder seamlessly switches between multiple operational modes. The trellis decoder employs a code sequence detection system that detects codes in input interleaved packet data. The code sequence detection system also reduces the delay (latency) between the input of encoded data and the output of decoded data. The code sequence detection system processes video data in the form of groups of interleaved trellis encoded data packets and includes a traceback network that identifies a sequence of antecedent trellis states, in accordance with a state transition trellis. The traceback network identifies the antecedent states for collocated interleaved packets in response to decision data associated with trellis state transitions. Output trellis decoded data is provided in response to the identified sequence of antecedent trellis states. The decoder can also provide a plurality of trellis decoded data sequences. The decoded data sequences are provided by identifying corresponding antecedent trellis state sequences with delayed decision data in accordance with a state transition trellis. One of the decoded data sequences is identified with a pointer updated by identifying antecedent trellis states with the decision data.
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Digital Television Standard for HDTV Transmission, of Apr. 12, 1995 (HDTV Standard), prepared by the US Advanced Television Systems Committee (ATSC), Containing Sections 4.2.4-4.2.6, 10.2.3.8-10.2.3.10, 4.2.6-4.2.7, 10.2.3.9-10.2.3.13, 10.3.2-10.3.3.3 and 10.2.3.9.
TCM In The HDTV Transceiver, by J. Kim et al. of the University of California, Los Angeles.
VSB Modulation Used For Terrestrial And Cable Broadcasts, by G. Sgrignoli et al., published in the I.E.E.E. Transactions on Consumer Electronics, vol. 41, No. 3, Aug. 1995.
Architectural Tradeoffs For Survivor Sequence Memory Management In Viterbi Decoders by G. Feygin et al., published in the I.E.E.E. Transactions on Communications, vol. 41, No. 3, Mar. 1993.
Caldwell Maurice David
Hu Keren
Lin William Wei-Lian
Burke Alexander J.
Desir Jean W.
Kurdyla Ronald H.
Peng John K.
Thomson Multimedia S.A.
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