Method and apparatus for non-overlapped transforming of an audio signal, method and apparatus for adaptively encoding audio signal with the transforming, method and apparatus for inverse non-overlapped transforming of an audio signal, and method and apparatus for adaptively decoding audio signal with the inverse transforming
US8086446B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2005 |
| Grant date | Dec 27, 2011 |
| Priority date | — |
| Expiry date | Aug 14, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10L19/022
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and apparatus for transforming an audio signal, a method and apparatus for adaptively encoding an audio signal, a method and apparatus for inversely transforming an audio signal, and a method and apparatus for adaptively decoding an audio signal. The method of transforming an audio signal includes determining a transform unit into which the audio signal in a time domain is to be transformed into an audio signal in a frequency domain, and transforming the audio signal into an audio signal in the frequency domain according to the determined transform units using a window coefficient other than 0. Accordingly, it is possible to minimize distortion of the audio signal when encoding the audio signal even at a high bit rate while increasing efficiency of compression.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.