Patent · US Active

Reordering coefficients for waveform coding or decoding

US7693709B2 · kind B2 · utility

39Cited by

133References

22Claims

0Family size

Assignee

Microsoft Corporation · US

Inventors

Naveen Thumpudi · Redmond, US
Wei-Ge Chen · Beijing, CN
Chao He · Tayport, GB

Key dates

Filing date	Jul 15, 2005
Grant date	Apr 6, 2010
Priority date	—
Expiry date	Jul 26, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG10L19/0212
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

Techniques and tools for reordering of spectral coefficients in encoding and decoding are described herein. For certain types and patterns of content, coefficient reordering reduces redundancy that is due to periodic patterns in the spectral coefficients, making subsequent entropy encoding more efficient. For example, an audio encoder receives spectral coefficients logically organized along one dimension such as frequency, reorders at least some of the spectral coefficients, and entropy encodes the spectral coefficients after the reordering. Or, an audio decoder receives entropy encoded information for such spectral coefficients, entropy decodes the information, and reverses reordering of at least some of the spectral coefficients.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.