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Video Watermarking for Tampering Detection and Reconstruction of the Audio part

Esmaeilbayg, Zahra | 2018

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50681 (05)
  4. University: Sharif University of Technology
  5. Department: Electrical Engineering
  6. Advisor(s): Ghaemmaghami, Shahrokh
  7. Abstract:
  8. Owing to the unprecedented increasing rate of introducing new means of editing and transferring videos, appropriate and efficient methods for authentication and tampering detection are already playing a pivotal role in today's world. Amongst various methods for authentication, tampering detection and property right protection, the focus of this thesis is on watermarking. In the first place, we will present watermarking methods based upon H.264 standard. Due to the fact that almost all of the video products are stored and distributed in compressed file formats, the ability to retrieve the watermark after video compression is of crucial importance. Hence watermarking whilst video compression is an overriding priority compared to watermarking the footage. Transparency, robustness and capacity are paramount in watermarking. Moreover, bit rate increase is of vital importance to video watermarking, and in this case, based on the existing evaluation criteria, the simulation results show that our suggested methods are successful. Then, in subsequent chapters, we will investigate the problem of authentication and tampering detection in the audio part of a video. Thus, using our specially designed robust watermarking methods, we will watermark by means of Hash data obtained from speech frames, or by using a compressed format of the speech signal. The practical results of using the compressed speech signal as a watermark demonstrate that even after a second video compression, it is possible to retrieve the speech signal of course with a reasonable lower quality
  9. Keywords:
  10. Robust Watermarking ; Digital Watermarking ; Video Compression ; Tamper Detection ; H.264 Video Codec

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