Dither-like data hiding in multistage vector quantization of MELP and G.729 speech coding

Author

Chang, Pao-Chi ; Yu, Hsin-Min

Author_Institution

Dept. of Electr. Eng., Nat. Central Univ., Chung-li, Taiwan

Volume

2

fYear

2002

fDate

3-6 Nov. 2002

Firstpage

1199

Abstract

We present a speech data hiding technique that utilizes the characteristics of multistage vector quantization (MSVQ) and subtractive dithering to maintain high speech reconstruction quality. The last stage of MSVQ is used to store the data to be embedded. Similar to subtractive dithering, the noise-like hidden data is subtracted from the signal at the first stage of the encoder and added back at the MSVQ decoder. As a result, the degradation caused by hiding secret data is significantly reduced compared to the traditional simple substitution method.

Keywords

data encapsulation; linear predictive coding; signal reconstruction; speech coding; vector quantisation; G.729 speech coding; MELP speech coding; mixed excitation linear predictive coding; multistage vector quantization; speech data hiding; speech reconstruction; subtractive dithering; Art; Cryptography; Data encapsulation; Decoding; Degradation; Linear predictive coding; Protection; Speech coding; Speech enhancement; Vector quantization;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7576-9

Type

conf

DOI

10.1109/ACSSC.2002.1196972

Filename

1196972