Title :
Trellis-searched adaptive predictive coding of speech
Author :
Malone, Kevin T. ; Fischer, Thomas R.
Author_Institution :
Sandia Nat. Lab., Albuquerque, NM, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
Trellis coded vector quantization (TCVQ) and forward adaptive predictive coding (APC) are used to form an efficient speech coding system operating at bit rates of 16 and 9.6 kb/s. The effectiveness of the system is studied for a variety of system parameters and utterances. Simulation results indicate that segmental signal-to-noise ratios as high as 23.8 and 15.4 dB are obtainable at 16 and 9.6 kb/s respectively. The quality of the reconstructed speech is deemed to be excellent at 16 kb/s and very good at 9.6 kb/s. An algorithm for optimizing the residual codebooks is presented
Keywords :
linear predictive coding; speech coding; trellis codes; vector quantisation; 16 kbit/s; 9.6 kbit/s; APC-TCVQ system; forward adaptive predictive coding; residual codebooks; segmental signal-to-noise ratios; speech coding; trellis coded vector quantisation; Automata; Bit rate; Decoding; Delay; Distortion measurement; Encoding; Predictive coding; Signal to noise ratio; Speech coding; Vector quantization;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
