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(12) United States Patent ao) Patent No.: Us 7,617,110 B2
Kim et al. (45) Date of Patent: Nov. 10,2009
(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,
(73) Assignee: Samsung Electronics Co., Ltd.,
( * ) 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
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* cited by examiner