公开(公告)号：US06260017B1

公开(公告)日：2001-07-10

申请号：US09307294

申请日：1999-05-07

申请人： Amitava Das ,  Sharath Manjunath

发明人： Amitava Das ,  Sharath Manjunath

IPC分类号： G10L1910

CPC分类号： G10L19/18 ,  G10L19/10

摘要： A multipulse interpolative coder for transition speech frames includes an extractor configured to represent a first frame of transitional speech samples by a subset of the samples of the frame. The coder also includes an interpolator configured to interpolate the subset of samples and a subset of samples extracted from an earlier-received frame to synthesize other samples of the first frame that are not included in the subset. The subset of samples is further simplified by selecting a set of pulses from the subset and assigning zero values to unselected pulses. In the alternative, a portion of the unselected pulses may be quantized. The set of pulses may be the pulses having the greatest absolute amplitudes in the subset. In the alternative, the set of pulses may be the most perceptually significant pulses of the subset.

摘要翻译： 用于转换语音帧的多脉冲内插编码器包括提取器，其被配置为通过帧的样本的子集来表示过渡语音样本的第一帧。 编码器还包括被配置为内插样本子集的内插器和从较早接收的帧提取的样本的子集，以合成不包括在子集中的第一帧的其他样本。 通过从子集中选择一组脉冲并将零值分配给未选择的脉冲来进一步简化样本子集。 在替代方案中，可以对未选择的脉冲的一部分进行量化。 该组脉冲可以是子集中绝对幅度最大的脉冲。 在替代方案中，该组脉冲可以是该子集中最感知的显着脉冲。