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• W2100005160 abstract "Real-time watermarking for streaming video (such as VOD service) requires significant amounts of computing resources. To address this issue, we present a scalable watermarking scheme integrated in a parallel MPEG-2 engine. A content-based block selection algorithm is proposed to efficiently embed the pseudo-random watermark signatures into DCT blocks. Our watermark scheme also provides a robust way to synchronize the watermarked video to the original source at detectors and is very resilient against cumulative and temporal attack. We optimize the parallel watermark engine to achieve real-time watermarking performance. We found that the system throughput could suffer significant degradation when processing high-level MPEG-2 video (such as HDTV) due to inefficient management of memory space. Therefore, we investigated an efficient buffer management scheme consisting of two methods: First we reduced the transmission buffer in slave nodes by frames sharing between frames in the Group-of-Picture (GOP) level. Then we further reduce the buffer space by a dynamic on-demand allocation on the slave side. By solving the memory-shortage bottleneck, the proposed system can support real-time watermarking for multiple high-resolution (up to 1404 × 960) video." @default.
• W2100005160 created "2016-06-24" @default.
• W2100005160 creator A5024094461 @default.
• W2100005160 creator A5032639183 @default.
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• W2100005160 date "2009-03-01" @default.
• W2100005160 modified "2023-09-25" @default.
• W2100005160 title "A real-time video watermarking system with buffer sharing for video-on-demand service" @default.
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• W2100005160 doi "https://doi.org/10.1016/j.compeleceng.2008.06.011" @default.
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