Performance of CCITT´s 16 kbit/s LD-CELP algorithm with non-voice signals

Author

Dimolitsas, Spiros ; Corcoran, Franklin L. ; Phipps, John G., Jr.

Author_Institution

COMSAT Lab., Clarksburg, MD, USA

fYear

1992

Firstpage

1704

Abstract

Recently, CCITT adopted a low-delay code excited linear predictive (LD-CELP) coder as a new standard for the coding of telephone bandwidth speech at 16 kbit/s. The methodology and results of a performance evaluation of the LD-CELP coder with nonvoice signals are presented. From this evaluation it was determined that this algorithm is acceptably transparent to network signalling as well as voiceband data at rates not exceeding 2.4 kbit/s. Therefore, it was concluded that the 16 kbit/s LD-CELP algorithm is suitable for selected network application where high-speed voiceband data are not used, or where alternate facilities for voiceband data traffic are provided, such as in circuit multiplication equipment

Keywords

delays; linear predictive coding; speech coding; 16 kbit/s; 2.4 kbit/s; CCITT; LD-CELP algorithm; LD-CELP coder; circuit multiplication equipment; codec; low-delay code excited linear predictive; network signalling; nonvoice signals; performance evaluation; standard; telephone bandwidth speech; voiceband data; Bandwidth; Codecs; Distortion measurement; Harmonic distortion; Modems; Monitoring; Noise level; Noise measurement; System testing; Telephony;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 1992. Conference Record., GLOBECOM '92. Communication for Global Users., IEEE

Conference_Location

Orlando, FL

Print_ISBN

0-7803-0608-2

Type

conf

DOI

10.1109/GLOCOM.1992.276676

Filename

276676