发明名称 |
CODING GENERIC AUDIO SIGNALS AT LOW BITRATES AND LOW DELAY |
摘要 |
A mixed time-domain / frequency-domain coding device and method for coding an input sound signal, wherein a time-domain excitation contribution is calculated in response to the input sound signal. A cut-off frequency for the time-domain excitation contribution is also calculated in response to the input sound signal, and a frequency extent of the time-domain excitation contribution is adjusted in relation to this cut-off frequency. Following calculation of a frequency-domain excitation contribution in response to the input sound signal, the adjusted time-domain excitation contribution and the frequency-domain excitation contribution are added to form a mixed time-domain / frequency-domain excitation constituting a coded version of the input sound signal. In the calculation of the time-domain excitation contribution, the input sound signal may be processed in successive frames of the input sound signal and a number of sub-frames to be used in a current frame may be calculated. Corresponding encoder and decoder using the mixed time-domain / frequency-domain coding device are also described. |
申请公布号 |
WO2012055016(A8) |
申请公布日期 |
2012.06.28 |
申请号 |
WO2011CA01182 |
申请日期 |
2011.10.24 |
申请人 |
VOICEAGE CORPORATION;VAILLANCOURT, TOMMY;JELINEK, MILAN |
发明人 |
VAILLANCOURT, TOMMY;JELINEK, MILAN |
分类号 |
G10L19/12 |
主分类号 |
G10L19/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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