A bitrate and bandwidth scalable CELP coder

  title={A bitrate and bandwidth scalable CELP coder},
  author={Toshiyuki Nomura and Masahiro Iwadare and Masahiro Serizawa and Kazunori Ozawa},
This paper proposes a flexible CELP speech coder with bitrate and bandwidth scalabilities for multimedia applications. The coder is based on multi-pulse-based CELP coding and consists of a bitrate scalable base-band coder and a bandwidth extension tool. The bitrate scalable base-band CELP coder employs multi-stage excitation coding based on an embedded-coding approach. The multipulse excitation codebook at each stage is adaptively produced depending on the selected excitation signal at the… CONTINUE READING
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