The size of the code book for the pitch is enlarged in the all-voiced mode so that the pitch can be more exactly quantized.

将码字索引空间按照带通浊音度模式进行细致划分，全浊音模式下的基音周期得到了更多的码矢量，从而进一步提高了基音周期的量化精度。

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The size of the code book for the pitch is enlarged in the all-voiced mode so that the pitch can be more exactly quantized.

将码字索引空间按照带通浊音度模式进行细致划分，全浊音模式下的基音周期得到了更多的码矢量，从而进一步提高了基音周期的量化精度。

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