Paper Info
Title
A 1200 bps speech coder based on MELP
Abstract
This paper presents a 1.2 kbps speech coder based on the mixed excitation linear prediction (MELP) analysis algorithm. In the proposed coder, the MELP parameters of three consecutive frames are grouped into a superframe and jointly quantized to obtain a high coding efficiency. The interframe redundancy is exploited with distinct quantization schemes for different unvoiced/voiced (U/V) frame combinations in the superframe. Novel techniques for improving performance make use of the superframe structure. These include pitch vector quantization using pitch differentials, joint quantization of pitch and U/V decisions and LSF quantization with a forward-backward interpolation method. Subjective test results indicate that the 1.2 kbps speech coder achieves approximately the same quality as the proposed federal standard 2.4 kbps MELP coder
Year
DOI
Venue
2000
10.1109/ICASSP.2000.861835
ICASSP
Keywords
Field
DocType
distinct quantization schemes,forward-backward interpolation method,multi-frame mixed excitation linear prediction,interpolation,pitch differentials,mf-melp,1.2 kbit/s,consecutive frames,interframe redundancy,vector quantisation,superframe structure,melp analysis algorithm,vocoders,high coding efficiency,subjective test results,speech coding,u/v decisions,unvoiced/voiced frame combinations,pitch vector quantization,lsf quantization,speech coder,speech synthesis,algorithm design and analysis,linear predictive coding,decoding,testing,vector quantization
Mixed-excitation linear prediction,Speech synthesis,Speech coding,Computer science,Superframe,Speech recognition,Vector quantization,Inter frame,Quantization (signal processing),Linear predictive coding
Conference
Volume
ISSN
ISBN
3
1520-6149
0-7803-6293-4
Citations 
PageRank 
References 
2
0.44
4
Authors
5
Name
Order
Citations
PageRank
Tian Wang191.11
Kazuhito Koishida2407.66
Vladimir Cuperman35611.32
Allen Gersho420.44
John S. Collura541.17