Method and apparatus for obtaining an attenuation factor

Details Method and apparatus for obtaining an attenuation factor Method and apparatus for obtaining an attenuation factor

2011-06-07

2011-06-07

Armstrong, Angela A (Department: 2626)

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

C704S207000, C704S221000, C714S746000, C714S747000

Reexamination Certificate

active

07957961

ABSTRACT:
The present invention discloses a method for obtaining an attenuation factor. The method is adapted to process the synthesized signal in packet loss concealment, and includes: obtaining a change trend of a pitch of a signal; obtaining an attenuation factor, according to the change trend of the pitch of the signal. The present invention also discloses an apparatus for obtaining an attenuation factor. A self-adaptive attenuation factor is adjusted dynamically by using the latest change trend of a history signal by using the present invention. The smooth transition from the history data to the data last received is realized so that the attenuation speed is kept consistent between the compensated signal and the original signal as much as possible for adapting to the characteristic of various human voices.

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