Turbo code protection of video watermark channel

Author

Ambroze, A. ; Wade, G. ; Serdean, C. ; Tomlinson, M. ; Stander, J. ; Borda, M.

Author_Institution

Dept. of Commun. & Electron. Eng., Plymouth Univ., UK

Volume

148

Issue

1

fYear

2001

fDate

2/1/2001 12:00:00 AM

Firstpage

54

Lastpage

58

Abstract

The operational capacity of a watermark data channel is deduced by examining the correlation distribution at the retrieval end of a spread-spectrum-based watermarking system. This enables capacity to be determined given MPEG-2 compression, geometric attack, visual thresholds and channel coding. Watermarking itself is carried out in the DCT domain using video-dependent and visual perception concepts. An objective of the paper is to determine the capacity improvement provided by advanced FEC. It is found that FEC based on multiple parallel concatenated convolutional codes (3PCCCs) can give an order improvement in capacity for compressed video, and typically gives 0.5 kbit/s capacity under a combined compression-geometric attack

Keywords

channel capacity; channel coding; concatenated codes; convolutional codes; copy protection; copyright; correlation methods; data compression; discrete cosine transforms; forward error correction; security of data; spread spectrum communication; transform coding; turbo codes; video coding; visual perception; DCT domain; FEC; Gaussian distribution; MPEG-2 compression; SNR; channel capacity; channel coding; compressed video; compression-geometric attack; copyright protection; correlation distribution; parallel concatenated convolutional codes; sliding correlator; spread-spectrum-based watermarking system; turbo code protection; video watermark channel; video-dependent concept; visual perception; visual thresholds; watermark data channel;

fLanguage

English

Journal_Title

Vision, Image and Signal Processing, IEE Proceedings -

Publisher

iet

ISSN

1350-245X

Type

jour

DOI

10.1049/ip-vis:20010109

Filename

918403