Use of low-delay code-excited linear prediction technology in circuit multiplexed networks

Author

Dimolitsas, S. ; Corcoran, F.L. ; Baraniecki, M. ; Phipps, J.G., Jr.

Author_Institution

COMSAT Lab., Clarksburg, MD, USA

Volume

2

fYear

1993

fDate

27-30 April 1993

Firstpage

608

Abstract

The LD-CELP (code excited linear prediction) algorithm was adopted by the CCITT, as a Recommendation G.728 for the coding of speech with toll quality at 16 kbit/s. The operation of the LD-CELP algorithm at 12.8 kbit/s is described, and its performance is assessed both with voice and nonvoice signals in single and interconnected network configurations. The 12.8 kbit/s LD-CELP codec is found to perform equivalently to 24 kbit/s ADPCM (adaptive differential pulse code modulation). It is also shown that 12.8 kbit/s LD-CELP is acceptably transparent to network signaling. As a result, it can be concluded that the operation of the LD-CELP algorithm at 12.8 kbit/s presents a viable option for inclusion within 16-kbit/s-based DCME (digital circuit multiplication equipment) or PCME (packet circuit multiplication equipment) overload strategies.<>

Keywords

circuit switching; code standards; linear predictive coding; speech coding; time division multiplexing; 12.8 kbit/s; CCITT; algorithm; circuit multiplexed networks; coding of speech; digital circuit multiplication equipment; low-delay code-excited linear prediction; network signaling; overload strategies; packet circuit multiplication equipment; performance; toll quality;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1993. ICASSP-93., 1993 IEEE International Conference on

Conference_Location

Minneapolis, MN, USA

ISSN

1520-6149

Print_ISBN

0-7803-7402-9

Type

conf

DOI

10.1109/ICASSP.1993.319383

Filename

319383