| 摘要 |
A speech coder for high quality coding of speech signals at low bit rates is disclosed. An excitation quantization unit 12 expresses an excitation signal in terms of a combination of a plurality of pulses. A codebook (i.e., an amplitude codebook) simultaneously quantizes either amplitude or position of pulses, and executes excitation signal quantization of the other parameter by making retrieval of the codebook.
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