发明名称 |
Speech-encoding rate decision apparatus and method in a variable rate vocoder |
摘要 |
An apparatus and method for determining a speech-encoding rate in a variable rate vocoder are disclosed. A set of thresholds are computed based on background noise energy and its variation. A signal energy value of an input signal is computed, and a rate decision is made based on comparisons of the computed signal energy value with the computed thresholds. In one embodiment, a preliminary rate and a hangover interval are first computed based on the comparisons. The preliminary rate decision is then modified to take into account hangover constraints, a long term prediction gain and minimum and maximum rate constraints.
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申请公布号 |
US6397177(B1) |
申请公布日期 |
2002.05.28 |
申请号 |
US19990265455 |
申请日期 |
1999.03.10 |
申请人 |
SAMSUNG ELECTRONICS, CO., LTD. |
发明人 |
ISABELLE STEVEN |
分类号 |
G10L19/14;(IPC1-7):G10L19/14 |
主分类号 |
G10L19/14 |
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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