Scale factor based bit shifting in fine granularity...

Details Scale factor based bit shifting in fine granularity... Scale factor based bit shifting in fine granularity...

2003-11-18

2009-11-17

Dorvil, Richemond (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S200000, C704S201000

Reexamination Certificate

active

07620545

ABSTRACT:
One embodiment of the present invention provides a method coding audio signals in a base layer and an enhancement layer comprising the steps of quantizing the audio signals in spectral lines into quantized data in a plurality of sub-bands in an order of most significant bits (MSBs) to least significant bits (LSBs), determining a plurality of scale factors corresponding to each of the sub-bands according to respective noise tolerance of each of the sub-bands, bit shifting the quantized data in the sub-bands by the respective scale factor if they exceed a threshold value, coding the quantized data in the base layer, coding the quantized data in the enhancement layer, truncating the quantized data in the enhancement layer up to respective layer size limits, de-shifting the coded data wit the respective scale factors, de-quantizing the coded data, and decoding the coded data.

REFERENCES:
patent: 4149263 (1979-04-01), Prioste
patent: 4727506 (1988-02-01), Fling
patent: 5367608 (1994-11-01), Veldhuis et al.
patent: 5758315 (1998-05-01), Mori
patent: 6263022 (2001-07-01), Chen et al.
patent: 6349284 (2002-02-01), Park et al.
patent: 6456963 (2002-09-01), Araki
patent: 6529604 (2003-03-01), Park et al.
patent: 6542863 (2003-04-01), Surucu
patent: 6639943 (2003-10-01), Radha et al.
patent: 6678647 (2004-01-01), Edler et al.
patent: 6678653 (2004-01-01), Tsushima et al.
patent: 6728739 (2004-04-01), Kobayashi et al.
patent: 6792044 (2004-09-01), Peng et al.
patent: 6931060 (2005-08-01), Jiang et al.
patent: 6931370 (2005-08-01), McDowell
patent: 7103316 (2006-09-01), Hall
patent: 7181079 (2007-02-01), Herre et al.
patent: 7190832 (2007-03-01), Frost et al.
patent: 7260226 (2007-08-01), Miura et al.
patent: 7318027 (2008-01-01), Lennon et al.
patent: 7373293 (2008-05-01), Chang et al.
patent: 7391813 (2008-06-01), Shinsho
patent: 7454327 (2008-11-01), Neubauer et al.
patent: 2002/0076049 (2002-06-01), Boykin et al.
patent: 2003/0079222 (2003-04-01), Boykin et al.
patent: 2003/0091194 (2003-05-01), Teichmann et al.
Li, “Overview of Fine Granularity Scalability in MPEG-4 Video Standard”, IEEE Transactions on Circuits and Systems for Video Technology, vol. 11, No. 3, Mar. 2001.
Jayant et al., “Signal Compression Based on Models of Human Perception”, Proceedings of the IEEE, vol. 81, No. 10, Oct. 1993.
Audio Subgroup, International Organization for Standardization Organization International Normalisation ISO/IEC JTC 1/SC 29/WG 11 Coding of Moving Pictures and Audio, SFBBS on BSAC System, N10084, Oct. 2003.

Affiliated with

Also associated with

Rating

Scale factor based bit shifting in fine granularity... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Scale factor based bit shifting in fine granularity..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scale factor based bit shifting in fine granularity... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4115217