用于可视电话应用的实时宽带CELP编码器

Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing Pub Date : 1994-04-19 DOI:10.1109/ICASSP.1994.389703

E. Harborg, J. E. Knudsen, A. Fuldseth, F. Johansen

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引用次数: 22

摘要

在本文中，我们提出了一种使用编码激发线性预测(CELP)以16 kbps的速度对宽带(7 kHz)语音信号进行编码的算法，主要用于ISDN网络中的视听编码系统(例如视频电话)或其他使用扬声器声音的电信设备。该算法是一种全频带方法，在降低计算复杂度方面做了大量的工作。这导致了当前算法在单个TMS320C31 DSP(编码器+解码器)上的实时实现。通过正式的主观评估，我们已经证明了其性能可与CCITT Rec. G.722子带编码器相媲美，速度为64 kbps。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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A real-time wideband CELP coder for a videophone application

In this paper we present an algorithm for the coding of wideband (7 kHz) speech signals at 16 kbps using code excited linear prediction (CELP), primarily intended for use in audio-visual coding systems (e.g., videotelephony) in the ISDN network, or other telecommunication equipment using loudspeaker sound. The algorithm is a full-band approach and much effort has been put into reducing the computational complexity. This has led to a real-time implementation of the present algorithm on a single TMS320C31 DSP (encoder+decoder). Through a formal subjective evaluation we have demonstrated a performance comparable to the CCITT Rec. G.722 subband coder at 64 kbps.<>

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Proceedings of ICASSP '94. IEEE International Conference on Acoustics, Speech and Signal Processing

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