Chun Se Wang

US Patent:

59405422, Aug 17, 1999

Filed:

Nov 4, 1996

Appl. No.:

8/743631

Inventors:

Weiping Li - Bethlehem PA
Qinghong Cao - Emmaus PA
Chun Wang - Emmaus PA
Kenneth K. Tzeng - Bethlehem PA

Assignee:

Competitive Technologies of PA, Inc. - Fairfield CT

International Classification:

G06K 936
H04L 2302
H04L 2706

US Classification:

382253

Abstract:

A method and apparatus is disclosed for encoding and decoding an input signal representative of video or audio information. A form of the method includes the following steps: processing the input signal to produce a sequence of vectors representative of the input signal; implementing a lattice vector quantization procedure on individual vectors of the sequence to identify a lattice point of a lattice that is closest to the individual vector and to obtain an index value representative of a labelling of the identified lattice point, the lattice vector quantization procedure including a multi-level allocation of groups of reserved indices, and selection of the index value for the individual vector within a group of reserved indices. The index signals representative of the index values are stored and/or transmitted, and then recovered for decoding. The decoding is operative to obtain a recovered sequence of vectors, and the sequence of vectors can be processed to produce an output signal.

US Patent:

58839810, Mar 16, 1999

Filed:

Oct 18, 1996

Appl. No.:

8/733849

Inventors:

Weiping Li - Bethlehem PA
Qinghong Cao - Emmaus PA
Chun Wang - Emmaus PA
Kenneth K. Tzeng - Bethlehem PA

Assignee:

Competitive Technologies of PA, Inc. - Bethlehem PA

International Classification:

G06K 936
G06K 946
G06K 938

US Classification:

382253

Abstract:

A method is disclosed for encoding and decoding an input signal representative of video or audio information. A form of the encoding includes the following steps: processing the input signal to produce a sequence of vectors representative of the input signal; implementing a lattice vector quantization procedure on individual vectors of the sequence to identify a lattice point of a lattice that is closest to the individual vector and to obtain an index value representative of a labelling of the identified lattice point, the lattice vector quantization procedure including a multi-level allocation of groups of reserved indices, and selection of the index value for the individual vector within a group of reserved indices. The index signals representative of the index values are stored and then recovered for decoding, or transmitted before decoding. The decoding is operative to obtain a recovered sequence of vectors, and the sequence of vectors can be processed to produce an output signal.

Address:

831 Ward Dr, Northampton, PA 18067

Phone:

(610)2621669

VIN:

WVWHD7AJ2BW208940

Make:

VOLKSWAGEN

Model:

GTI

Year:

2011