- 专利标题: System of encoding and decoding speech signals
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申请号: US09663734申请日: 2000-09-15
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公开(公告)号: US06604070B1公开(公告)日: 2003-08-05
- 发明人: Yang Gao , Adil Benyassine , Jes Thyssen , Eyal Shlomot , Huan-yu Su
- 申请人: Yang Gao , Adil Benyassine , Jes Thyssen , Eyal Shlomot , Huan-yu Su
- 主分类号: G10L1912
- IPC分类号: G10L1912
摘要:
A speech compression system capable of encoding a speech signal into a bitstream for subsequent decoding to generate synthesized speech is disclosed. The speech compression system optimizes the bandwidth consumed by the bitstream by balancing the desired average bit rate with the perceptual quality of the reconstructed speech. The speech compression system comprises a full-rate codec, a half-rate codec, a quarter-rate codec and an eighth-rate codec. The codecs are selectively activated based on a rate selection. In addition, the full and half-rate codecs are selectively activated based on a type classification. Each codec is selectively activated to encode and decode the speech signals at different bit rates emphasizing different aspects of the speech signal to enhance overall quality of the synthesized speech.
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