Adaptive variable length encoder/decoder

Details Adaptive variable length encoder/decoder Adaptive variable length encoder/decoder

1993-01-13

1995-03-21

Chin, Tommy P.

Television

Bandwidth reduction system

348390, 348404, 348400, 375241, 341 67, H04N 7133, H04N 7137

Patent

active

054000750

ABSTRACT:
A variable length encoding/decoding system for use with a layered signal format, and for adaptively providing VLC changes without additional signal overhead, includes a plurality of VLC encoding tables, respective ones of the tables being preprogrammed with VLC codes associated with anticipated signal statistics. The layered signal includes blocks of data subject to common parameters which parameters may be associated with signal statistics. The blocks of data include information indicative of such parameters. Each packet is examined for the common parameter and responsive thereto a default VLC coding/decoding table is assigned. In a further embodiment the VLC table used for each successive codeword is made dependent upon the table utilized for the lastmost codeword and the relative value of the lastmost codeword.

REFERENCES:
patent: 4922510 (1990-05-01), Brusewitz
patent: 4942467 (1990-01-01), Waldman et al.
patent: 4957688 (1990-09-01), De With
patent: 4982285 (1991-01-01), Sugiyama
patent: 5111292 (1992-05-01), Kuriacose et al.
patent: 5138316 (1992-08-01), Konishi
patent: 5146325 (1992-09-01), Ng
patent: 5216518 (1993-06-01), Yamagami
patent: 5225832 (1993-07-01), Wang et al.
patent: 5245338 (1993-09-01), Sun
patent: 5343195 (1994-08-01), Cooper
Int. Org. for Standardization, Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC2/WG11/MPEG91/270, Nov. 1991, Proposal 06, Vadis/Cost Forward Prediction Coding, Submitted by G. Bjontegaard (Norweigian Telecom).
Int. Org. for Standardization, Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC2/WG11, MPEG92/452 Revision, Nov. 1992, Introduction of the Second VLC Table for Intra Coding by Y. Yagasaki et al. (Sony).
Int. Org. for Standardization, Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC29/WG11, MPEG92/704, Nov. 1992, London, Core Experiment Proposal on VLC Adaptation, by A. Puri et al.
Int. Org. for Standardization, C oding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC29/WG11, MPEG92/508, Sep. 1992, Tarrytown, Report on Quantization Core Experiments and A VLC Proposal by A. Puri et al.
Int. Org. for Standardization, Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC29/WG11, MPEG92/Sep. 1992, MPEG-2 Syntax Proposal in Support of the Cablelabs Profile (CLP) Requirements Document, by B. Haskell et al.
Int. Org. for Standardization, Coding of Moving Pictures and Associated Audio, ISO/IEC JTC1/SC29/WG11, MPEG92/ Sep. 1992, Core Experiment: Adaptive Switching of Coefficient VLC'S by Barry Haskell et al.

Affiliated with

Also associated with

Rating

Adaptive variable length encoder/decoder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Adaptive variable length encoder/decoder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adaptive variable length encoder/decoder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1152566