MPEG-7 Metadata for Video Transcoding: Motion and Difficulty Hints

摘要

This paper concerns the extraction methodology and usage of MPEG-7 metadata for video transcoding. The idea of the MPEG-7 descriptors presented within this paper is to give by means of MPEG-7 metadata Transcoding Hints to a transcoder regarding Motion and Encoding Difficulty. These transcoding hints can be used at the transcoder 1.) to preserve the visual quality in terms of PSNR (Peak Signal to Noise Ratio), 2.) to modify the GOP (Group of Pictures) structure for efficient storage and retrieval (e.g. for fast video browsing), while 3.) reducing the overall computational complexity significantly.