发明授权
US5490230A Digital speech coder having optimized signal energy parameters 失效
数字语音编码器具有优化的信号能量参数

Digital speech coder having optimized signal energy parameters
摘要:
A speech coder and decoder methodology wherein pitch excitation and codebook excitation source energies are represented by parameters that are readily transmissible with minimal transmission capacity requirements. The parameters are the long term energy value, a short term correction factor which is applied to the long term energy value to match the short term energy, and proportionality factor(s) that specify the relative energy contribution of the excitation sources to the short term energy value.
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