Scalable decoder and scalable decoding method
US8160868B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 2006 |
| Grant date | Apr 17, 2012 |
| Priority date | — |
| Expiry date | Aug 13, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0057
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.