Video transcoder architectures for bit rate scaling of H.263 bit streams
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
Rate adaptation transcoding for precoded video streams
Proceedings of the tenth ACM international conference on Multimedia
A DCT-Domain Video Transcoder for Spatial Resolution Downconversion
VISUAL '02 Proceedings of the 5th International Conference on Recent Advances in Visual Information Systems
Mismatch MB Retrieval for MPEG-2 to MPEG-4 Transcoding
PCM '01 Proceedings of the Second IEEE Pacific Rim Conference on Multimedia: Advances in Multimedia Information Processing
Architecture of a quality based intelligent proxy (QBIX) for MPEG-4 videos
WWW '03 Proceedings of the 12th international conference on World Wide Web
A systematic rate controller for MPEG-4 FGS video streaming
Multimedia Systems
Cost effective transcoding for QoS adaptive multimedia streaming
Proceedings of the 2004 ACM symposium on Applied computing
Adaptive video transcoding and streaming over wireless channels
Journal of Systems and Software - Special issue: Adaptive multimedia computing
Recent advances in rate control for video coding
Image Communication
An efficient complexity-scalable video transcoder with mode refinement
Image Communication
MPEG-4 to H.264/AVC transcoding
IWCMC '07 Proceedings of the 2007 international conference on Wireless communications and mobile computing
Fast video transcoding from H.263 to H.264/MPEG-4 AVC
Multimedia Tools and Applications
Efficient hybrid DCT-domain algorithm for video spatial downscaling
EURASIP Journal on Advances in Signal Processing
Open loop transcoding using perceptually adaptive requantization of DCT coefficients
MobiMedia '06 Proceedings of the 2nd international conference on Mobile multimedia communications
Fast perceptual region tracking with coding-depth sensitive access for stream transcoding
Journal of Visual Communication and Image Representation
Model-based transrating of H.264 coded video
IEEE Transactions on Circuits and Systems for Video Technology
Compressed-domain techniques for error-resilient video transcoding using RPS
IEEE Transactions on Image Processing
Multiview video transcoding: from multiple views to single view
PCS'09 Proceedings of the 27th conference on Picture Coding Symposium
Architectures for fast transcoding of H.264/AVC to quality-scalable SVC streams
IEEE Transactions on Multimedia
Interval type-2 fuzzy logic congestion control for video streaming across IP networks
IEEE Transactions on Fuzzy Systems
Content-aware error-resilient transcoding using prioritized intra-refresh for video streaming
Journal of Visual Communication and Image Representation
Foveation embedded DCT domain video transcoding
Journal of Visual Communication and Image Representation
Motion information exploitation in H.264 frame skipping transcoding
ACIVS'07 Proceedings of the 9th international conference on Advanced concepts for intelligent vision systems
Requantization transcoding for H.264/AVC video coding
Image Communication
Video transcoding to support random access in scalable video coding
WSEAS Transactions on Signal Processing
Adaptive streaming of combined audio/video content over wireless networks
MMNS'06 Proceedings of the 9th IFIP/IEEE international conference on Management of Multimedia and Mobile Networks and Services
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
News video summarization based on spatial and motion feature analysis
PCM'04 Proceedings of the 5th Pacific Rim Conference on Advances in Multimedia Information Processing - Volume Part II
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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Many of the forthcoming video services and multimedia applications are expected to use preencoded video for storage and transmission. Video transcoding is intended to provide transmission flexibility to preencoded bit streams by dynamically adjusting the bit rate of these bit streams according to new bandwidth constraints that were unknown at the time of encoding. In this paper, we propose a drift-free MPEG-2 video transcoder, working entirely in the frequency domain. The various modes of motion compensation (MC) defined in MPEG-2 are implemented in the discrete cosine transform (DCT) domain at reduced computational complexity. By using approximate matrices to compute the MC-DCT blocks, we show that computational complexity can be reduced by 81% compared with the pixel domain approach. Moreover, by using a Lagrangian rate-distortion optimization for bit reallocation, we show that optimal transcoding of high-quality bit streams can produce better picture quality than that obtained by directly encoding the uncompressed video at the same bit rates using a nonoptimized Test Model 5 (TM5) encoder