Fast compression of watermarked videos
Hannes Mareen, Johan De Praeter, Glenn Van Wallendael, Peter Lambert · Ghent University Academic Bibliography (Ghent University) · 2019
Video watermarking is a well-established technology to help identify digital pirates when they illegally re-distribute videos.To securely distribute videos, every person receives a unique, watermarked version of the video.When numerous watermarked versions of a video are created, they should all be compressed before distributing them.Unfortunately, compressing a single video requires a lot of resources, let alone thousands of videos.Therefore, this poster presents a novel method to speed up the compression of watermarked videos.That is, only the unwatermarked video is compressed with a traditional video encoder.Then, the optimal coding decisions from this compressed video are reused during the compression of the watermarked videos.In contrast, state-of-the-art architectures re-calculate the optimal coding decisions for every watermarked video.Due to a high correlation of the re-used coding information with the optimal coding information, the compression efficiency and watermark robustness decrease only slightly.Most importantly, the proposed fast encoder speeds up the compression process with a factor of about 120.Consequently, video distributors can use the proposed architecture to deliver high-quality watermarked videos on a large scale without requiring an excessive amount of resources.