Image analysis – Image compression or coding – Including details of decompression
Patent
1995-04-18
1999-12-14
Johns, Andrew
Image analysis
Image compression or coding
Including details of decompression
382238, 382250, 348384, 348403, 358430, 369124, G06K 936, G06K 940, H04N 1102, G11B 700
Patent
active
060028017
ABSTRACT:
A video decoding system examines a block of DCT coefficients prior to computation of an inverse discrete cosine transform (IDCT) to determine the number of nonzero coefficients. A plurality of IDCT engines are available in the video system including an IDCT engine utilizing fewer computations for a sparse picture and an IDCT engine utilizing fewer computations for a nonsparse picture. The video decoding system selects an IDCT engine to minimize the number of computations performed and to thereby reduce the computational burden of IDCT transformation.
REFERENCES:
patent: 3918047 (1975-11-01), Denes
patent: 4797944 (1989-01-01), Tanaka
patent: 5164828 (1992-11-01), Tahara et al.
patent: 5227878 (1993-07-01), Puri et al.
patent: 5241395 (1993-08-01), Chen
patent: 5247363 (1993-09-01), Sun et al.
patent: 5253053 (1993-10-01), Chu et al.
patent: 5289577 (1994-02-01), Gonzales et al.
patent: 5315670 (1994-05-01), Shapiro
patent: 5333212 (1994-07-01), Ligtenberg
patent: 5347308 (1994-09-01), Wai
patent: 5357282 (1994-10-01), Lee
patent: 5371547 (1994-12-01), Siracusa et al.
patent: 5371611 (1994-12-01), Kato et al.
patent: 5379070 (1995-01-01), Retter et al.
patent: 5386232 (1995-01-01), Golin et al.
patent: 5400075 (1995-03-01), Savatier
patent: 5410553 (1995-04-01), Choon
patent: 5450599 (1995-09-01), Horvath et al.
patent: 5452104 (1995-09-01), Lee
patent: 5467131 (1995-11-01), Bhaskaran et al.
patent: 5481364 (1996-01-01), Ito
patent: 5489944 (1996-02-01), Jo
patent: 5490130 (1996-02-01), Akagiri
patent: 5502493 (1996-03-01), Meyer
patent: 5510840 (1996-04-01), Yonemitsu et al.
patent: 5523847 (1996-06-01), Feig et al.
patent: 5543846 (1996-08-01), Yagasaki
patent: 5552832 (1996-09-01), Astle
patent: 5563928 (1996-10-01), Rostoker et al.
patent: 5576958 (1996-11-01), Kawakatsu et al.
patent: 5625714 (1997-04-01), Fukuda
Dr. Richard Baker, "Standards Dominate Videoconferencing Implementations", Computer Design, Dec. 1994, pp. 66-70.
Stephen Ohr, "Digital Video Spearheads TV and Videoconferencing Applications", Computer Design, Dec. 1994, pp. 59-64.
Lawrence A. Rowe, et al., "MPEG Video in Software: Representation, Transmission, and Playback", High Speed Networking and Multimedia Computing, Symp. on Elec. Imaging Sci. & Tech., San Jose, CA, Feb. 1994, pp. 1-11.
Peng H. Ang, et al., "Video Compression Makes Big Gains", IEEE Spectrum, Oct. 1991, pp. 16-19.
Andy C, Hung, et al, "A Comparison of Fast Inverse Discrete Cosine Transform Algorithms", Multimedia Systems, .COPYRGT.1994, pp. 204-217.
P1180/D1, "Draft Standard Specification for the Implementation of 8.times.8 Inverse Discrete Cosine Transform", May 29, 1990, pp. 1-9.
ISO/IEC 11172-1, Information Technology-Coding of Moving Pictures and Associated Audio for Digital Stores Media at up to about 1,5 Mbit/s -Part 1: Systems, Aug., 01, 1993, pp. i-vi, 1-53.
ISO/IEC 11172-2, Information Technology-Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to about 1,5 Mbit/s -Part 1: Video, Aug., 01, 1993, pp. i-ix, 1-112.
ISO/IEC 11172-3, Information Technology-Coding of Moving Pictures and Associated Audio for Digital Storgae Media at up to about 1,5 Mbit/s -Part 1: Audio, Aug., 01, 1993, pp. i-vi, 1-150.
Kevin L. Gong, et al., "Parallel MPEG-1 Video Encoding", Report, University of California, Berkeley, Computer Science Division, 1994, pp. 1-14.
Liu Yi
Strongin Geoffrey S.
Tucker Michael R.
Advanced Micro Devices , Inc.
Davis Monica S.
Johns Andrew
Koestner Ken J.
LandOfFree
Method and apparatus for improved video decompression by selecti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for improved video decompression by selecti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for improved video decompression by selecti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-870979