This paper proposes a new efficient line spectrum pair (LSP) vector quantization method which uses moving average (MA) interframe prediction of the parameters. This method has two advantages over auto-regressive prediction: the degradation of decoded parameters caused by bit errors affects only a few of the following frames, and codeword decoding can start at any frame. Using MA prediction, the final reconstructed LSP vector (quantized vector) of the current frame is represented as a linear combination of current and previous frame code vectors. In this paper we describe ways to achieve a more efficient LSP coder when each frame has four 10-ms subfraines. The spectral distance obtained by this method at 30 bits per 40 ms is better than that obtained using conventional multi-stage VQ without interframe correlation at 40 bits per 40 ms.
|出版ステータス||Published - 1993 1月 1|
|イベント||1993 IEEE Workshop on Speech Coding for Telecommunications: Speech Coding for the Network of the Future, SCFT 1993 - Sainte-Adele, Canada|
継続期間: 1993 10月 13 → 1993 10月 15
|Conference||1993 IEEE Workshop on Speech Coding for Telecommunications: Speech Coding for the Network of the Future, SCFT 1993|
|Period||93/10/13 → 93/10/15|
ASJC Scopus subject areas
- コンピュータ ネットワークおよび通信