@conference {18289,
	title = {Video transcoding by reducing spatial resolution},
	booktitle = {Image Processing, 2000. Proceedings. 2000 International Conference on},
	volume = {1},
	year = {2000},
	month = {2000///},
	pages = {972 -975 vol.1 - 972 -975 vol.1},
	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},
	keywords = {approach;computational, coding;, coding;video, complexity;data, compression;data, cosine, DCT, delivery;open-loop, domain, encapsulation;discrete, estimation;network, estimation;transform, hiding;digital, method;spatial, quality;motion, reduction;video, residues;MPEG, resolution, resolution;motion, stream;compressed, transcoding;computational, transforms;image, vectors, video;downsized, video;image},
	doi = {10.1109/ICIP.2000.901123},
	author = {Yin,Peng and M. Wu and Liu,Bede}
}
