Variable frame rate parameter encoding via adaptive frame selection using dynamic programming

Author

George, E. Bryan ; McCree, Alan V. ; Viswanathan, Vishu R.

Author_Institution

Lab. of Personal Syst., Texas Instrum. Inc., Dallas, TX, USA

Volume

1

fYear

1996

fDate

7-10 May 1996

Firstpage

271

Abstract

This paper presents a block-coded VFR strategy that removes the familiar “anchor frame” constraint in favor of a generalized delayed decision analysis. This approach is referred to as adaptive frame selection using dynamic programming (AFS/DP). The AFS/DP algorithm determines optimal breakpoint locations using a perceptually-based performance measure, accommodates fixed bit-rate operation, and operates with fixed delay and low complexity. The AFS/DP algorithm has been implemented in the context of the MELP vocoder at 2400 bits/sec, and has demonstrated comparable performance to block VFR methods, with lower coder delay

Keywords

decision theory; dynamic programming; linear predictive coding; speech coding; vocoders; 2.4 kbit/s; AFS/DP algorithm; MELP vocoder; adaptive frame selection; block-coded VFR strategy; dynamic programming; fixed bit-rate operation; generalized delayed decision analysis; low bit rate; mixed excitation linear prediction; optimal breakpoint locations; perceptually-based performance measure; speech coding; variable frame rate parameter encoding; Delay; Dynamic programming; Encoding; Instruments; Interpolation; Laboratories; Linear predictive coding; Spectrogram; Speech; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on

Conference_Location

Atlanta, GA

ISSN

1520-6149

Print_ISBN

0-7803-3192-3

Type

conf

DOI

10.1109/ICASSP.1996.540410

Filename

540410