Title :
Performance evaluation and behavior of the floating-point 16 kb/s LD-CELP coder in noisy channels
Author :
Sindoukas, Dimitris I. ; Fotopoulos, Spiros ; Gabbouj, Moncef
Author_Institution :
Dept. of Phys., Patras Univ., Greece
Abstract :
We make objective and informal subjective measurements of the floating-point 16 kb/s LD-CELP performance with different bit-error rates. We also study the sensitivity of this coder to errors in gain and shape codeword index parts and the effect of an error to future outputs of the coder. Based on the transmitted code statistics we attempt to minimize the annoying effects of codeword errors. Finally, we examine audible oscillations and distortions in the synthesized speech signal, again in the context of channel errors
Keywords :
electronic equipment testing; error statistics; linear predictive coding; measurement; performance evaluation; speech coding; speech synthesis; vocoders; 16 kbit/s; audible distortions; audible oscillations; bit-error rates; channel errors; codeword errors; floating-point LD-CELP coder; gain; objective measurements; performance evaluation; shape codeword index; subjective measurements; synthesized speech signal; transmitted code statistics; Bit error rate; Distortion; Error analysis; Error correction codes; Humans; Performance evaluation; Physics; Protection; Shape; Signal synthesis; Speech coding; Speech synthesis;
Conference_Titel :
Signals, Systems and Computers, 1993. 1993 Conference Record of The Twenty-Seventh Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-4120-7
DOI :
10.1109/ACSSC.1993.342432
