Efficient spectral envelope coding using variable...

Details Efficient spectral envelope coding using variable... Efficient spectral envelope coding using variable...

2007-03-13

2007-03-13

Abebe, Daniel (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S200000

Reexamination Certificate

active

11246284

ABSTRACT:
The present invention provides a new method and an apparatus for spectral envelope encoding. The invention teaches how to perform and signal compactly a time/frequency mapping of the envelope representation, and further, encode the spectral envelope data efficiently using adaptive time/frequency directional coding. The method is applicable to both natural audio coding and speech coding systems and is especially suited for coders using SBR [WO 98/57436] or other high frequency reconstruction methods.

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