Lossless audio decoding/encoding method, medium, and apparatus

(54) LOSSLESS AUDIO DECODING/ENCODING METHOD, MEDIUM, AND APPARATUS

(75) Inventors: Junghoo Kim, Seoul (KR); Miao Lei, Beijing (CN); Shihwa Lee, Seoul (KR); Sangwook Kim, Seoul (KR); Ennmi Oh, Seoul (KR); Dohyung Kim,

Hwaseong-si (KR)

(73) Assignee: Samsung Electronics Co., Ltd.,

Suwon-Si (KR)

( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 915 days.

(21) Appl.No.: 11/066,431

(22) Filed: Feb. 28, 2005

(65) Prior Publication Data

US 2005/0192799 Al Sep. 1, 2005

(30) Foreign Application Priority Data

Feb. 27, 2004 (KR) 10-2004-0013681

6,675,148 B2* 1/2004 Hardwick 704/500

2005/0231396 Al * 10/2005 Dunn 341/50

A lossless audio encoding/decoding method, medium, and apparatus. The lossless audio encoding method includes converting an audio signal in a time domain into an audio spectral signal with an integer in a frequency domain, mapping the audio spectral signal in the frequency domain to a bit plane signal according to its frequency, and losslessly encoding binary samples of bit planes using a probability model determined according to a predetermined context. The lossless audio decoding method includes extracting a predetermined lossy bitstream and an error bitstream from error data by demultiplexing an audio bitstream, the error data corresponding to a difference between lossy encoded audio data and an audio spectral signal with an integer in a frequency domain, lossy decoding the extracted encoded lossy bitstream, losslessly decoding the extracted error bitstream, and restoring the original audio frequency spectral signal using the decoded lossy bitstream and error bitstream.

37 Claims, 10 Drawing Sheets

OTHER PUBLICATIONS

Oh, Eunmi, et al., "Improvement of coding efficiency in MPEG-4 audio scalable lossless coding (SLS)", ISO/IEC JLC1/SC29/WG11, MPEG2003/M10414, Dec. 2003.

Yu, R., et al., "A fine granular scalable perceptually lossy and lossless audio codec", 2003 IEEE International Conference on Multimedia and Expo Jul. 6-9, 2003 Baltimore, MD, USA., vol. 1, Jul. 6, 2003, pp. 1-65.

Taubman, David, et al., "Embedded, independent block-based coding of subband data", ISO/IED JTC 1/SC 29/WG1 N871, Jun. 23, 1998, paragraphs [11.2.3]—[11.2.5].

Yu, Rongshan, et al., "Advanced Audio Zip—A Scalable Perceptual
and Lossless Audio Codec", ITU ISO/IEC JLC1/SC29/WG11
M9134, Dec. 2002, paragraphs [0001]—[0007].
Lian, Chung-Jr, et al., "Analysis and Architecture Design of Block-
Coding Engine for EBCOL in JPEG 2000", IEEE Lransactions on
Circuits and Systems for Video Lechnology, IEEE Service Center,
Piscataway,NJ, vol. 13, No. 3, Mar. 2003, paragraphs [0001], [0011],
[IV, B].

European Search Report, dated Aug. 25, 2006, and issued in related
European Application No. 05251075.7—2218.

* cited by examiner