Application level hand-off support for mobile media transcoding sessions
NOSSDAV '02 Proceedings of the 12th international workshop on Network and operating systems support for digital audio and video
Adaptive video transcoding and streaming over wireless channels
Journal of Systems and Software - Special issue: Adaptive multimedia computing
Efficient video transcoding from H.263 to H.264/AVC standard with enhanced rate control
EURASIP Journal on Applied Signal Processing
Effective algorithms for fast transcoding of AVS to H.264/AVC in the spatial domain
Multimedia Tools and Applications
Video frame rate up conversion under inconsistent camera motion
Multimedia Tools and Applications
EURASIP Journal on Advances in Signal Processing
Adaptive up-sampling method using DCT for spatial scalability of scalable video coding
IEEE Transactions on Circuits and Systems for Video Technology
A multi-layer motion estimation scheme for spatial scalability in H.264/AVC scalable extension
ICME'09 Proceedings of the 2009 IEEE international conference on Multimedia and Expo
An automatic mobile web generation method from PC web using DFS and W-DFS
ICCSA'07 Proceedings of the 2007 international conference on Computational science and Its applications - Volume Part II
Parabolic Motion-Vector Re-estimation Algorithm for Compressed Video Downscaling
Journal of Signal Processing Systems
An efficient compressed domain spatial transcoding scheme for adaptive video content delivery
PCM'10 Proceedings of the Advances in multimedia information processing, and 11th Pacific Rim conference on Multimedia: Part II
Mode decision for high-quality H.264/AVC video downscaling transcoding
PCM'10 Proceedings of the Advances in multimedia information processing, and 11th Pacific Rim conference on Multimedia: Part II
Scalable mobile internet servers: selecting useful images from the web for mobile services
ICCSA'06 Proceedings of the 2006 international conference on Computational Science and Its Applications - Volume Part II
Reducing spatial resolution for MPEG-2 to H.264/AVC transcoding
PCM'05 Proceedings of the 6th Pacific-Rim conference on Advances in Multimedia Information Processing - Volume Part II
Block matching using integral frame attributes
PCM'04 Proceedings of the 5th Pacific Rim conference on Advances in Multimedia Information Processing - Volume Part III
A fast downsizing video transcoder based on H.264/AVC standard
PCM'04 Proceedings of the 5th Pacific Rim conference on Advances in Multimedia Information Processing - Volume Part III
Effective drift reduction technique for reduced bit-rate video adaptation
PCM'04 Proceedings of the 5th Pacific Rim conference on Advances in Multimedia Information Processing - Volume Part III
Image filtering in the compressed domain
ICVGIP'06 Proceedings of the 5th Indian conference on Computer Vision, Graphics and Image Processing
An integrated approach for downscaling MPEG video
ICVGIP'06 Proceedings of the 5th Indian conference on Computer Vision, Graphics and Image Processing
DCT domain transcoding of H.264/AVC video into MPEG-2 video
ICVGIP'06 Proceedings of the 5th Indian conference on Computer Vision, Graphics and Image Processing
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Digital video is becoming widely available in compressed form, such as a motion JPEG or MPEG coded bitstream. In applications such as video browsing or picture-in-picture, or in transcoding for a lower bit rate, there is a need to downscale the video prior to its transmission. In such instances, the conventional approach to generating a downscaled video bitstream at the video server would be to first decompress the video, perform the downscaling operation in the pixel domain, and then recompress it as, say, an MPEG, bitstream for efficient delivery. This process is computationally expensive due to the motion-estimation process needed during the recompression phase. We propose an alternative compressed domain-based approach that computes motion vectors for the downscaled (N/2xN/2) video sequence directly from the original motion vectors for the N×N video sequence. We further discover that the scheme produces better results by weighting the original motion vectors adaptively. The proposed approach can lead to significant computational savings compared to the conventional spatial (pixel) domain approach. The proposed approach is useful for video severs that provide quality of service in real time for heterogeneous clients