A mixed excitation LPC vocoder model for low bit rate speech coding
Citations
1,025 citations
Cites background from "A mixed excitation LPC vocoder mode..."
...Mixed excitation [27] and aperiodicity [28] have usually been used to synthesize natural speech....
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759 citations
Additional excerpts
...例えば,本システムにおいて音源は単純に, 有声区間に関してはパルス列,無声区間に関しては白 色雑音を用いているが,音源情報も HMM の枠組み でモデル化し,音声符号化の技術である MELP [15] などで用いられている手法と同様の音源生成手法を導 入することにより,音質は更に向上すると考えられる (連続値,離散値を含む音源情報はMSD-HMMによ りモデル化可能であることに注意する)....
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...[15] A....
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559 citations
369 citations
Cites background from "A mixed excitation LPC vocoder mode..."
...Several new parameters of the excitation must be estimated at analysis time and coded for transmission, but these add only slightly to either the analysis computation or the bit rate [80]....
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...12 depicts the essential features of the mixed-excitation linear predictive coder (MELP) proposed by McCree and Barnwell [80]....
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...[75] and greatly refined by McCree and Barnwell [80]....
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314 citations
Cites methods from "A mixed excitation LPC vocoder mode..."
...Although synthesized speech has a typical quality of “vocoded speech,” it has been shown in [15] that the mixed excitation model based on MELP speech coder [20] and postfiltering can improve the speech quality significantly....
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References
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"A mixed excitation LPC vocoder mode..." refers background in this paper
...pulses which are often encountered in voicing transitions or in vocal fry [ 17 ]....
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363 citations
"A mixed excitation LPC vocoder mode..." refers methods in this paper
...We use a fixed triangle pulse [9], [ 23 ] based on a typical male pitch period, but first remove the lowpass character from its frequency response....
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