Method and system for reduction of quantization-induced...

Details Method and system for reduction of quantization-induced... Method and system for reduction of quantization-induced...

2006-12-11

2008-08-26

McFadden, Susan (Department: 2626)

Data processing: speech signal processing, linguistics, language

Audio signal bandwidth compression or expansion

C704S230000

Reexamination Certificate

active

07418395

ABSTRACT:
A method and system for reduction of quantization-induced block-discontinuities arising from lossy compression and decompression of continuous signals, especially audio signals. One embodiment encompasses a general purpose, ultra-low latency, efficient audio codec algorithm. More particularly, the invention includes a method and apparatus for compression and decompression of audio signals using a novel boundary analysis and synthesis framework to substantially reduce quantization-induced frame or block-discontinuity; a novel adaptive cosine packet transform (ACPT) as the transform of choice to effectively capture the input audio characteristics; a signal-residue classifier to separate the strong signal clusters from the noise and weak signal components (collectively called residue); an adaptive sparse vector quantization (ASVQ) algorithm for signal components; a stochastic noise model for the residue; and an associated rate control algorithm. The invention further includes corresponding computer program implementations of these and other algorithms.

REFERENCES:
patent: 5388181 (1995-02-01), Anderson et al.
patent: 5428395 (1995-06-01), Jeong
patent: 5787204 (1998-07-01), Fukuda
patent: 5911130 (1999-06-01), Shimizu et al.
patent: 5987407 (1999-11-01), Wu et al.
patent: 6006179 (1999-12-01), Wu et al.
patent: 6256422 (2001-07-01), Mitchell et al.
patent: 6263312 (2001-07-01), Kolesnik et al.
patent: 6370502 (2002-04-01), Wu et al.
patent: 6475245 (2002-11-01), Gersho et al.
patent: 6704706 (2004-03-01), Wu et al.
patent: 6885993 (2005-04-01), Wu et al.
patent: 0 910 067 (1999-04-01), None
patent: 08-330971 (1996-12-01), None
patent: WO 99/22365 (1999-05-01), None
Boden, A. F., Quantization Distortion in Block Transform-Compressed Data, Proceedings—DCC '95 Data Compression Conference, No. 28.3.1995, p. 427 (Mar. 30, 1995) (XP-002301642).
International Preliminary Examination Report dated Feb. 21, 2001 (9 pages).
Lu et al.; “Adaptive cosine transform coding using marginal analysis”;SPIEvol. 2488; pp. 162-166; Apr. 1995; XP000938051.
Morhac et al., “Multidimensional Data Compression Using a New Fast Adaptive Cosine Transform,” Applied Signal Processing, vol. 4, No. 1, pp. 16-26 (1997) (XP-000938172).
Ngan et al.; “A HVS-weighted cosine transform coding scheme with adaptive quantization”;SPIEvol. 1001 Visual Communications and Image Processing '88; pp. 702-708; Nov. 1988.
O'Shaughnessy, Douglas, “Windowing”,Speech Communication, Human and Machine, pp. E06-E07, Jan. 1990.
PCT International Search Report dated Sep. 9, 2000.
Taswell, Carl, “Speech Compression with Cosine and Wavelet Packet Near-Best Bases,” 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings, vol. 1, pp. 566-568 (May 7, 1996) (XP-002301643).

Affiliated with

Also associated with

Rating

Method and system for reduction of quantization-induced... 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 system for reduction of quantization-induced..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and system for reduction of quantization-induced... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4006994