抄録
An adaptive transform coder is proposed that makes effective use of vector quantization. It is aimed at medium-band (4. 8-9. 6 kbps) speech coding. To minimize waveform distortion, discrete Fourier transform (DFT) coefficients of the linear prediction residue are quantized using two novel techniques: information has been adaptively allocated so as to obtain SNR gain, and quantization has been divided into two (vector-scalar) stages for a higher bit rate. Subjective quality at 7. 2 kbps in comparable to that for a 5 bit log PCM. The coder is resistant to background noise.
| 本文言語 | English |
|---|---|
| ページ（範囲） | 87-95 |
| ページ数 | 9 |
| ジャーナル | Reports of the Electrical Communication Laboratory |
| 巻 | 34 |
| 号 | 1 |
| 出版ステータス | Published - 1986 1月 1 |
| 外部発表 | はい |
ASJC Scopus subject areas
- 工学（全般）