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Raw Speech Watermarlcing

Name: พฤศยน นินทนาวงศา

Organization : มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

keyword: Digital Watermarking 1 Speech Coding

Abstract: Data piracy has become a great concern in today's multimedia applications since digital data can be reproduced without anyquality loss. Digital watermarking is one technique that can be used against piracy. This thesis proposes an idea of using rawspeech data as a waterrnarlc signal to enhance the robustness of the watermark. To recover the illformation in the watermark, the extracted watermark will be played back as speech to a listener, and through the intelligent audio perception of the human listener, the contents of the speech may be recognized. The proposed approach is based on the fact that raw speech contains a considerable amount of redundancy, therefore, its co~lteilts can still be recognized after the extraction process, even if the watermarlced data is badly attacked. As long as the raw speech, extracted from the attacked watermarlced data, contains enough important information, its contents can be intelligible. Furthermore, the impressive intelligence of the human perceptual system, as it tends to adjust and learn quiclcly to determine the repeated speech, enhances the probability of recognizing thecontents of the extracted raw speech. Finally, observation on the outcome, when various types of encoding scheme are applied to the raw speech and then uses the encoded speech as a watermark, was conducted. A set of experiments was carried out to show that the proposed method not only successfully survives the common attacks, but also yields high intelligibility.

มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

Address: กรุงเทพมหานคร (Bangkok)

Email: info.lib@mail.kmutt.ac.th

Name: Dr.Suthep Madarasmi

Role: Supervisor

Created: 2543

Issued: 2005-10-17

Modified: 2006-05-30

วิทยานิพนธ์/Thesis

ISBN: 9746284568

CallNumber: CPE199

tha

DegreeName: วิศวกรรมศาสตรมหาบัณฑิต

Level: ปริญญาโท

Descipline: วิศวกรรมคอมพิวเตอร์

Grantor: มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

©copyrights มหาวิทยาลัยเทคโนโลยีพระจอมเกล้าธนบุรี

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