Shaped fixed codebook search for CELP coding at low bit rates

Author

Erzin, Engin

Author_Institution

Lucent Technol. Bell. Labs., Whippany, NJ, USA

Volume

3

fYear

2000

fDate

2000

Firstpage

1495

Abstract

This paper presents a new shaped fixed codebook (FCB) search technique for code excited linear predictive (CELP) coding. The state of art CELP coding techniques operate at rates above 4.0 kbps, as it gets harder to build a good FCB contribution with a minimal bit budget. In this paper the shaped FCB search is presented to ease this problem, and achieve a better FCB contribution with a reduced bit budget. The shaped FCB search integrated to a 4 kbps CELP coder is presented and the subjective performance results are reported which show that the coder is significantly better than the IS-127 half rate coder at 4 kbps

Keywords

linear predictive coding; search problems; speech codecs; speech coding; vocoders; 4 kbit/s; CELP; IS-127 half rate coder; code excited linear predictive coding; low bit rate coding; shaped fixed codebook search; speech coding; subjective performance results; Art; Bit rate; Books; Code standards; Filters; Linear predictive coding; Pulse shaping methods; Speech codecs; Speech coding; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.861920

Filename

861920