Patent
Scalable decoder and scalable decoding method
Takuya Kawashima,Hiroyuki Ehara +1 more
- 13 Mar 2006
15
TL;DR: In this article, a scalable decoder capable of avoiding deterioration in subjective quality of a listener is proposed, where a voice analysis section detects variation in power of a core layer decoding voice signal being obtained from the core layer encoding data.
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Abstract: A scalable decoder capable of avoiding deterioration in subjective quality of a listener. The scalable decoder for decoding core layer encoding data and extension layer encoding data including an extension layer gain coefficient, wherein a voice analysis section detects variation in power of a core layer decoding voice signal being obtained from the core layer encoding data, a gain attenuation rate calculating section (140) sets the attenuation intensity variable depending on variation in power, and a gain attenuation section (143) attenuates the extension layer gain coefficient in a second period preceding a first period according to a set attenuation intensity when extension layer encoding data in the first period is missing, thus interpolating the extension layer gain coefficient in the first period.
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Takahiro Unno
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