A 300bps speech coding algorithm based on multi-mode matrix quantization

A 300bps speech coder based on multi-frame structure and multi-mode matrix quantization is presented. The multi-frame structure consisting of six frames is adopted to reduce the algorithm delay. The parameter matrices are classified into different modes based on the voicing vector information of superframe. To improve speech quality, a dynamic bit allocation scheme is developed. Experimental results show that the speech quality of the proposed vocoder is intelligible with good naturalness.

[1]  Allen Gersho,et al.  A 1200/2400 bps coding suite based on MELP , 2002, Speech Coding, 2002, IEEE Workshop Proceedings..

[2]  Xiongwei Zhang,et al.  Efficient coding of LSF parameters using multi-mode predictive multistage matrix quantization , 2008, 2008 9th International Conference on Signal Processing.

[3]  Thomas F. Quatieri,et al.  Multisensor very lowbit rate speech coding using segment quantization , 2008, 2008 IEEE International Conference on Acoustics, Speech and Signal Processing.

[4]  Alan McCree.  A Scalable Phonetic Vocoder Framework Using Joint Predictive Vector Quantization of Melp Parameters , 2006, 2006 IEEE International Conference on Acoustics Speech and Signal Processing Proceedings.

[5]  Li Junlin.  High quality 0.6 kb/s speech coding algorithm , 2003 .

[6]  M. W. Chamberlain.  A 600 bps MELP vocoder for use on HF channels , 2001, 2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277).

[7]  Xiongwei Zhang,et al.  High quality 0.6/1.2/2.4kbps multi-band LPC speech coding algorithm , 2006 .

[8]  John S. Collura,et al.  MELP: the new Federal Standard at 2400 bps , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[9]  Philippe Gournay,et al.  Description of the French NATO candidate , 2002, Speech Coding, 2002, IEEE Workshop Proceedings..

[10]  A.M. Kondoz,et al.  A 2.4/1.2 kbps SB-LPC based speech coder: the Turkish NATO STANAG candidate , 2002, Speech Coding, 2002, IEEE Workshop Proceedings..

[11]  Methods for objective and subjective assessment of quality Perceptual evaluation of speech quality ( PESQ ) : An objective method for end-to-end speech quality assessment of narrow-band telephone networks and speech codecs , 2002 .