Analysis of LD-CELP coder output with Sound eXchange and Praat software

Author

Mathew, Lani Rachel ; Anselam, Ancy S. ; Pillai, Sakuntala S.

Author_Institution

Dept. of Electron. & Commun., Mar Baselios Coll. of Eng. & Technologyy, Thiruvananthapuram, India

fYear

2014

fDate

8-10 May 2014

Firstpage

1281

Lastpage

1285

Abstract

This paper describes the analysis of the audio and speech output of the 16 kb/s Low Delay CELP algorithm (LD-CELP). For various speech file conversions, the SoX (Sound eXchange) tool is used. Praat software is used to extract details regarding the quality of the sound synthesized by the coder. The C program of the coder was compiled using the GCC compiler in the Linux environment and executed using the GNU Make utility. File compression ratio of 5 was achieved. The bit rate obtained is 16 kb/s, i.e. a reduction by 4 times of the original bitrate. The perceptual quality of the reconstructed audio output is very good, and this is evident from the spectrogram, pitch, intensity and formant waveforms obtained.

Keywords

C language; Linux; linear predictive coding; program compilers; speech coding; C program; GCC compiler; GNU make utility; LD-CELP coder output; Linux environment; Praat software; SoX; bit rate; file compression ratio; formant waveforms; intensity waveforms; low delay CELP algorithm; pitch; sound eXchange; spectrogram; speech file conversions; Decoding; Speech; Speech coding; LD-CELP; Praat; Sound eXchange; Speech coding; code excited linear prediction; linear prediction; low delay; perceptual weighting;

fLanguage

English

Publisher

ieee

Conference_Titel

Advanced Communication Control and Computing Technologies (ICACCCT), 2014 International Conference on

Conference_Location

Ramanathapuram

Print_ISBN

978-1-4799-3913-8

Type

conf

DOI

10.1109/ICACCCT.2014.7019305

Filename

7019305