Title :
Very low data rate speech compression with LPC vector and matrix quantization
Author :
Wong, D.Y. ; Juang, B.H. ; Cheng, D.Y.
Author_Institution :
Speech Technology Lab., Santa Barbara, CA
Abstract :
Frame predictive vector quantization is developed to compress the bit rate for coding the LPC filter coefficients to under 250 bits/sec. An innovative LPC compression technique, matrix quantization, is also developed to compress the LPC filter coefficients to a rate under 150 bits/sec. Subjective evaluation with the diagnostic rhyme test (DRT) finds the proposed techniques to be feasible for intelligible speech transmission at bit rates between 400 bits/sec and 200 bits/sec.
Keywords :
Bit rate; Encoding; Entropy; Filters; Linear predictive coding; Speech analysis; Speech synthesis; Testing; Vector quantization; Vocoders;
Conference_Titel :
Acoustics, Speech, and Signal Processing, IEEE International Conference on ICASSP '83.
DOI :
10.1109/ICASSP.1983.1172244