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標題Title: A CELP-Speech Information Hiding Algorithm Based on Vector Quantization
作者Authors: 張弘彬,Ji-Xin Liu..等
上傳單位Department: 資訊工程系
上傳時間Date: 2010-6-28
上傳者Author: 張弘彬
審核單位Department: 資訊工程系
審核老師Teacher: 陳定宏
檔案類型Categories: 課堂報告In-class Report
關鍵詞Keyword: CELP,information hiding,vector quantization,speech
摘要Abstract: This paper presents a speech information-hiding
scheme that is integrated with the CELP (Coded Exited Linear
Prediction) speech coding method. The G.729 codec (CS-
ACELP) is used to test the efficiency of this scheme. The index-
constrained method is applied for the secret information
embedding. The selected bits of first-stage and residual vector
indices during the Predictive Two-stage Vector Quantization
procedure are modulated by the secret information bits. For
the imperceptibility of this scheme, the quality of the
watermarked speech signal can be controlled by adaptive
embedding through referring to the original and watermarked
speech. Experimental results show that this scheme can be
effective and the distortion of the speech signal is trivial and
imperceptible.

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2010_6_76f4eb64.pdf 247Kb pdf 262 39
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