The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2013
Filed:
Jul. 24, 2006
Takashi Onuma, Tokyo, JP;
Yasuhiro Toguri, Kanagawa, JP;
Hideaki Watanabe, Tokyo, JP;
Noriaki Fujita, Chiba, JP;
Haifeng Bao, Tokyo, JP;
Manabu Uchino, Kanagawa, JP;
Takashi Onuma, Tokyo, JP;
Yasuhiro Toguri, Kanagawa, JP;
Hideaki Watanabe, Tokyo, JP;
Noriaki Fujita, Chiba, JP;
Haifeng Bao, Tokyo, JP;
Manabu Uchino, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A method and apparatus for encoding audio data and a method and apparatus for decoding audio data, which can generate and decode, respectively, scalable lossless streams and which can shorten the time necessary to generate and decode lossless streams. A lossy-core encoder unit performs lossy compression on an input audio signal, generating a core stream. A simplified lossy-core decoding unit decodes only spectral signals of a specified band, e.g., a lower frequency band to generate a lossy decoded audio signal. A subtracter subtracts a lossy decoded audio signal from the input audio signal delayed to generate a residual signal. A rounding-off unit performs a process of rounding off the number of bits constituting the residual signal by eliminating the residual sign bit without loss of precision. A lossless-enhance encoder unit performs lossless compression on the residual signal to generate an enhanced stream. A stream-combining unit combines the core stream and the enhanced stream to generate a scalable lossless stream.