Coded data generation or conversion – Digital code to digital code converters – To or from variable length codes
Patent
1994-12-30
1997-07-22
Gaffin, Jeffrey A.
Coded data generation or conversion
Digital code to digital code converters
To or from variable length codes
341 65, 341141, H03M 740
Patent
active
056507810
ABSTRACT:
A variable length code(VLC) decoding apparatus for simultaneously decoding two different VLC bit streams includes two storage units, in response to each read signal, for storing fixed length segments contained in each of the VLC bit streams; a first switch for selecting the fixed length segments from a first or a second storage unit, and for selecting a first or a second window control signal; a barrel shifter in response to selected window control signal for forming a decoding window on the selected segments in order to produce a decoding window output sequence thereof; a memory for producing a decoded word in response to a variable length codeword and for producing a codeword length output; a second switch, in response to a second selection signal, for producing the decoded word and the codeword length output as a first decoded word and a first codeword length or a second decoded word and a second codeword length output; two accumulators, in response to each of the codeword lengths, for generating the two window control signals and a first and a second pre-read signals; and a control unit, in response to the two window control signals and the two pre-read signals, for producing the two selection signals and the two read signals in order to enable the two different VLC bit streams to be decoded simultaneously.
REFERENCES:
patent: 4899149 (1990-02-01), Kahan
patent: 5173695 (1992-12-01), Sun et al.
patent: 5345236 (1994-09-01), Sramek, Jr.
patent: 5432512 (1995-07-01), Park
Shih-Fu Chang et al., "Designing High-Throughput VLC Decoder Part I-Concurrent VLSI Architectures", IEEE Transactions on Circuits and Systems for Video Technology, vol. 2, No. 2, pp. 187-196, Jun. 1992.
Horng-Dar Lin et al., "High Throughput Reconstruction of Huffman-Coded Images", 1989 IEEE International Conference on Computer Design: VLSI in Computers & Processors, pp. 172-175, Oct. 2-4, 1989.
Daewoo Electronics Co. Ltd
Gaffin Jeffrey A.
Kost Jason L. W.
LandOfFree
Apparatus for decoding variable length codes does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for decoding variable length codes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for decoding variable length codes will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1562658