Video transcoding by reducing spatial resolution | IEEE Conference Publication | IEEE Xplore

Video transcoding by reducing spatial resolution


Abstract:

In network delivery of digital video, if the bandwidth required for a video is not available, the video has to be recoded at a reduced bit rate. It is highly desirable th...Show More

Abstract:

In network delivery of digital video, if the bandwidth required for a video is not available, the video has to be recoded at a reduced bit rate. It is highly desirable that the transcoding is carried out in real time while maintaining reasonable image quality. In this paper, we propose a fast approach to derive from an MPEG stream a new MPEG stream with half the spatial resolution. For the downsized video, we first generate from the original compressed video an improved estimate of the motion vectors. We then propose a compressed domain approach with data hiding to produce DCT residues by an open-loop method. The computational complexity is significantly lower than a number of previous approaches. Simulation suggests that our approach produces reasonable image quality.
Date of Conference: 10-13 September 2000
Date Added to IEEE Xplore: 06 August 2002
Print ISBN:0-7803-6297-7
Print ISSN: 1522-4880
Conference Location: Vancouver, BC, Canada

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