A novel BWE scheme based on spectral peaks in G.729 compressed domain

Author

Deshpande, Murali Mohan ; Ramakrishnan, K.R.

Author_Institution

Dept. of Electr. Eng., Indian Inst. of Sci., Bangalore, India

fYear

2005

fDate

4-8 Sept. 2005

Firstpage

1

Lastpage

4

Abstract

This paper addresses the problem of interoperability of narrowband VoIP network with wideband wireless network. Bandwidth extension in G.729 compressed domain is proposed to address this problem. The proposed method is based on spectral envelope extension using classified codebook approach. The number of spectral peaks is used as the feature for classification in this method. The proposed method gives a performance improvement of around 0.8dB with respect to existing method of Decode Then Extend (DTE). This compressed domain method also reduces the computational cost by around 2.5 MIPS on TMS320C55x DSP with respect to DTE.

Keywords

Internet telephony; data compression; decoding; radio networks; signal classification; BWE scheme; DTE method; G.729 compressed domain method; TMS320C55x DSP; bandwidth extension; classified codebook approach; computational cost reduction; decode then extend method; narrowband VoIP network; spectral envelope extension; spectral peaks; wideband wireless network; Decoding; Narrowband; Niobium; Speech; Speech coding; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2005 13th European

Conference_Location

Antalya

Print_ISBN

978-160-4238-21-1

Type

conf

Filename

7078050