System and method of encoding and decoding a layered bitstream b

Details System and method of encoding and decoding a layered bitstream b System and method of encoding and decoding a layered bitstream b

1996-08-22

2000-07-18

Teska, Kevin J.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704230, G10L 702

Patent

active

060920416

ABSTRACT:
The invention provides a device, method (400,500,600), and system (100) to improve compression efficiency when coding audio for bitrate scalability. It includes at least one of an encoder and a decoder and is applicable when utilizing perceptual coding for an upper bitrate. The encoder includes a hybrid psychoacoustic modeling unit, coupled to receive lowband audio and diffband audio, for determining psychoacoustic data, and a quantizer control and zero-flagging unit, coupled to receive psychoacoustic data and diffband audio, for determining explicit quantizer stepsize parameters and at least one of: 1) implicit quantizer stepsize parameters and 2) implicit zero-flags. The decoder includes a lowband psychoacoustic model, coupled to receive lowband audio samples, for determining lowband psychoacoustic data, and a implicit quantizer stepsize and zero-flag computer, coupled to receive lowband psychoacoustic data for determining at least one of: 1) implicit quantizer stepsize parameters and 2) implicit zero-flags.

REFERENCES:
patent: 4956871 (1990-09-01), Swaminathan
patent: 5105463 (1992-04-01), Veldhuis et al.
patent: 5151941 (1992-09-01), Nishiguchi et al.
patent: 5227788 (1993-07-01), Johnston et al.
patent: 5367608 (1994-11-01), Veldhuis et al.
patent: 5621660 (1997-04-01), Chaddha et al.
patent: 5692102 (1997-11-01), Pan
"Coding of Moving Pictures and Audio: MPEG-2 Audio NBC (13818-7) Committee Draft", M. Bosi, K. Brandenburg, S. M. Dietz, J.Johnston, J. Herre, H. Fuchs, Y. Oikawa, K. Akagiri, M. Coleman, M. Iwadare, C. Leuck ISO/IEC 13818-7:1996.
"Technical Description of the MPEG-4 Audio Coding Proposal from University of Hannover and Deutsche Bundespost Telekom",B. Edler (University of Hanover). ISO/IEC JTC1/SC29/WG11. MPEG95/0414, Oct. 1995.
MPEG4 Technical Description Cointribution of University of Erlangen/FhG-IIS, B. Grill, K-H.Brandenburg, ISO/IEC JTC1/SC29/WG11 MPEG95/0426, Oct. 26, 1995.
"Transform Coding of Audio Signals Using Perceptual Noise Criteria" James D. Johnston, IEEE Journal of Selected Areas in Communications, vol. 6, No. 2, Feb. 1988, pp 314-323.
"A Nonlinear Psychoacoustic Model Applied to the ISO MPEG Layer 3 Coder", F. Baumgarte, C. Frerekidis, and Hendrik Fuchs, AES 4087 (J-2).
Excerpts from ISP/IEC, Information Technology-Coding of Moving Pictures and Associated Audio for Digital Stoarge Media at up t Standard, 1993 "Psychoacoustic Models" pp D1-D-2, and pp 118-128.
"Techniques for Improving the Performance of Celp Type Speech Coders", Ira A. Gerson and Mark A. Jasiuk, Corporate Systems Research Laboratories, Motoroal, Inc. pp 205-254.
"Predictive Coding of Speech Signals and Subjective Error Cirteria". Bishnu S. Atal, and Manfred R. Schroeder, IEEE Transactions on Acoustices, Speech, and Signal Processing, vol. ASSP-27, No. 3, Jun. 1979.
Grill et al. MPEG4 Technical Description, 1995.
Pan, Davis. A tutorial on MPEG/Audio compression. IEEE MultiMedia. vol. 2. Issue 2. 60-74, 1995.

Affiliated with

Also associated with

Rating

System and method of encoding and decoding a layered bitstream b does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System and method of encoding and decoding a layered bitstream b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method of encoding and decoding a layered bitstream b will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2047528