Computationally efficient audio coder

Details Computationally efficient audio coder Computationally efficient audio coder

2011-04-19

2011-04-19

Cyr, Leonard Saint (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

Psychoacoustic

C704S200000, C704S500000, C704S501000, C704S503000, C704S504000

Reexamination Certificate

active

07930170

ABSTRACT:
The present invention provides a computationally efficient technique for compression encoding of an audio signal, and further provides a technique to enhance the sound quality of the encoded audio signal. This is accomplished by including more accurate attack detection and a computationally efficient quantization technique. The improved audio coder converts the input audio signal to a digital audio signal. The audio coder then divides the digital audio signal into larger frames having a long-block frame length and partitions each of the frames into multiple short-blocks. The audio coder then computes short-block audio signal characteristics for each of the partitioned short-blocks based on changes in the input audio signal. The audio coder further compares the computed short-block characteristics to a set of threshold values to detect presence of an attack in each of the short-blocks and changes the long-block frame length of one or more short-blocks upon detecting the attack in the respective one or more short-blocks.

REFERENCES:
patent: 5268685 (1993-12-01), Fujiwara
patent: 5481614 (1996-01-01), Johnston
patent: 5590108 (1996-12-01), Mitsuno et al.
patent: 5592584 (1997-01-01), Ferreira et al.
patent: 5701389 (1997-12-01), Dorward et al.
patent: 5732189 (1998-03-01), Johnston et al.
patent: 5742735 (1998-04-01), Eberlein et al.
patent: 5794028 (1998-08-01), Tran
patent: 5819214 (1998-10-01), Suzuki et al.
patent: 5825320 (1998-10-01), Miyamori et al.
patent: 5825979 (1998-10-01), Tsutsui et al.
patent: 5848391 (1998-12-01), Bosi et al.
patent: 5974379 (1999-10-01), Hatanaka et al.
patent: 6161123 (2000-12-01), Renouard et al.
patent: 6252851 (2001-06-01), Siu et al.
patent: 6263312 (2001-07-01), Kolesnik et al.
patent: 6772113 (2004-08-01), Fujita et al.
patent: 6799164 (2004-09-01), Araki
patent: 0612158 (1994-08-01), None
patent: 0725493 (1996-08-01), None
patent: 0725493 (1996-08-01), None
“International Application No. PCT/IB01/01371 Article 34 Amendment filed Dec. 16, 2002”, 3 pgs.
“International Application No. PCT/IB01/01371 Chapter II Demand filed Aug. 9, 2002”, 8 pgs.
“International Application No. PCT/IB01/01371 International Preliminary Examination Report mailed Jan. 20, 2003”, 6 pgs.
“International Application No. PCT/IB01/01371 International Search Report mailed Mar. 7, 2002”, 10 pgs.
“International Application No. PCT/IB01/01371 Written Opinion mailed Oct. 16, 2002”, 6 pgs.

Affiliated with

Also associated with

Rating

Computationally efficient audio coder does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Computationally efficient audio coder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Computationally efficient audio coder will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2739390