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Spatial resolution reduction of compressed video is highly desirable in video transcoding. Many studies have addressed this problem, but they either cause drift error or have high computation complexity. A new spatial downsampling algorithm for DCT-Domain video transcoder is proposed in this paper, in which L??M sub-blocks of N??N are combined into a L??N rows and M??N columns blocks in DCT-Domain...
Multimedia applications have become the most promising applications over wireless networks. However,wireless networks have lower bandwidth than wired networks, this calls for fast bitrate reduction techniques through video transcoding that can deliver the best video quality to the receiver while adhering to the bitrate constraints of the wireless network.This paper presents a hybrid homogenous H.264...
Wireless video communication is an important application supported by 3G mobile communication systems. Motivated by the wide adoption of H.264 and the demand of universal multimedia data access over wireless network, this paper presents a fast video transcoder, working entirely in the DCT-domain, to convert high quality H.264 bitstream into low bit rate stream with low spatial resolution for wireless...
Motivated by the wide adoption of H.264 and the demand of universal multimedia data access over wireless network , this paper studies H.264 homogeneous video transcoding with spatial resolution conversion. Firstly , we propose a fast video transcoder ,working entirely in the DCT-domain,to convert high quality H.264 bitstream into low bit rate stream with low spatial resolution for wireless video access...
This paper presents a hybrid H.264 video transcoding scheme in order to reduce the bitrate. Firstly, we propose a cascaded pixel-domain architecture to transcode intra frame which can enhance the rate-distortion performance; Then, we propose to transcode inter frame with open-loop architecture, which can improve the transcoding speed; at last, we propose a drift error compensation algorithm for P...
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