采用多阶形成峰后置滤波器对G.723.1声码器进行语音增强

Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030) Pub Date : 1999-09-15 DOI:10.1109/TENCON.1999.818513

Hee Won Lee, Jeong-Jin Kim, K. Jang, M. Bae

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引用次数: 2

摘要

CELP型声编码器采用共振峰后置滤波器补偿共振峰失真，提高了语音质量。形成峰后滤波器一般由传统的ARMA滤波器和一阶倾斜补偿滤波器组成。本文提出了一种用多阶倾斜补偿滤波器代替一阶倾斜补偿滤波器来提高语音质量的新方法。该算法适用于G.723.1网络电话或视频会议。从而最大程度地改善了频谱失真约3.22%，语音质量提高约0.04个MOS分数。

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The speech enhancement of the G.723.1 vocoder using multi-order formant postfilter

The speech quality of CELP type vocoders is improved by compensating the formant distortion with a formant postfilter. The formant postfilter is generally composed of the conventional ARMA filter with the 1-order tilt compensation filter. We propose a new method to improve speech quality using multi-order tilt compensation filter instead of the 1-order tilt compensation filter. This algorithm is applied to G.723.1 for Internet phone or videoconferencing. Consequently, spectrum distortion is improved about 3.22% and speech quality is improved about 0.04 of MOS score maximally.

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Proceedings of IEEE. IEEE Region 10 Conference. TENCON 99. 'Multimedia Technology for Asia-Pacific Information Infrastructure' (Cat. No.99CH37030)

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