发明名称 |
Audio coding method and apparatus |
摘要 |
An encoder comprising predictive coding means for encoding electronic signals input thereto is disclosed. The predictive coding means is adapted to operate in a first high prediction order mode and in a second lower prediction order mode. The predictive coding means operates in the first and second modes in dependence on an input electronic signal comprising a transient signal. Preferably, the second mode comprises a transient recovery sequence of prediction orders. The transient signal detector determines predictive coding gain as well as a difference in predictive coding gain for a sequential input signal exceeding a threshold. The prediction orders are gradually increased for subsequent signals until the first mode (high) prediction order is attained. A transmission of electronics signals provides for an indication of initiation of a second mode for the predictive coding. Circuitry is included for reception of the second mode initiate signal. There is also disclosed a decoder for decoding signals encoded by the encoder. |
申请公布号 |
GB9620457(D0) |
申请公布日期 |
1996.11.20 |
申请号 |
GB19960020457 |
申请日期 |
1996.10.01 |
申请人 |
NOKIA MOBILE PHONES LIMITED |
发明人 |
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分类号 |
G10L19/00;G10L19/02;G10L19/06 |
主分类号 |
G10L19/00 |
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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