Methods for improving high frequency reconstruction

Details Methods for improving high frequency reconstruction Methods for improving high frequency reconstruction

2002-11-28

2008-12-23

Hudspeth, David R. (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S501000, C704S502000, C704S503000

Reexamination Certificate

active

07469206

ABSTRACT:
The present invention proposes a new method and a new apparatus for enhancement of audio source coding systems utilizing high frequency reconstruction (HFR). It utilizes a detection mechanism (703a) on the encoder side to assess what parts of the spectrum will not be correctly reproduced by the HFR method in the decoder. Information on this is efficiently coded (703b) and sent to the decoder, where it is combined with the output of the HFR unit.

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English translation of Japanese Patent Action.
Valin, J. and R. Lefebvre;Bandwidth Extension of Narrowband Speech for Low Bit-Rate Wideband Coding; 2000; IEEE.

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