The Journal of the Acoustical Society of Korea

한국음향학회 (The Acoustical Society of Korea)
권호 표지

Multi Mode Harmonic Transform Coding for Speech and Music

  • Kim, Jonghark (Dept. of Radio Engineering, Chungbuk National University) ;
  • Shin, Jae-Hyun (Dept. of Radio Engineering, Chungbuk National University) ;
  • Lee, Insung (Dept. of Radio Engineering, Chungbuk National University)
  • 발행 : 2003.09.01
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초록

A multi-mode harmonic transform coding (MMHTC) for speech and music signals is proposed. Its structure is organized as a linear prediction model with an input of harmonic and transform-based excitation. The proposed coder also utilizes harmonic prediction and an improved quantizer of excitation signal. To efficiently quantize the excitation of music signals, the modulated lapped transform(MLT) is introduced. In other words, the coder combines both the time domain (linear prediction) and the frequency domain technique to achieve the best perceptual quality. The proposed coder showed better speech quality than that of the 8 kbps QCELP coder at a bit-rate of 4 kbps.

키워드

참고문헌

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