| Paper: | SLP-P9.4 | ||
| Session: | Speech Coding | ||
| Time: | Wednesday, May 17, 14:00 - 16:00 | ||
| Presentation: | Poster | ||
| Topic: | Speech and Spoken Language Processing: Narrow-band Speech Coding | ||
| Title: | NEW NATO STANAG NARROW BAND VOICE CODER AT 600 BITS/S | ||
| Authors: | Gwenael Guilmin, Francois Capman, Bertrand Ravera, Frederic Chartier, Thalès Communications, France | ||
| Abstract: | This paper describes a new very low bit rate speech coder at 600 bits/s based on the MELPe algorithm [3]. This coder associated with the other bit rates at 2400 bits/s and 1200 bits/s constitute the new NATO standard STANAG 4591. The STANAG 4591 Noise Pre-Processor is also part of the 600 bits/s coder. At 600 bits/s, four consecutive frames are grouped into a super-frame and jointly quantized to obtain high coding efficiency. The inter-frame redundancy is exploited with distinct quantization schemes for different unvoiced/voiced frame combinations in the super-frame. The paper gives a brief description of the algorithm, presents the quantization process for its operation at 600 bits/s, and gives some evaluation results and CPU and memory requirements for its implementation on DSP. | ||
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