Perfect requantization for video transcoding
Multimedia Tools and Applications
Efficient frequency domain selective scrambling of digital video
IEEE Transactions on Multimedia
Video transcoding: an overview of various techniques and research issues
IEEE Transactions on Multimedia
Performance evaluation of transcoding algorithms for H.264
IEEE Transactions on Consumer Electronics
Requantization for transcoding of MPEG-2 intraframes
IEEE Transactions on Image Processing
New architecture for dynamic frame-skipping transcoder
IEEE Transactions on Image Processing
Architectures for MPEG compressed bitstream scaling
IEEE Transactions on Circuits and Systems for Video Technology
Drift compensation for reduced spatial resolution transcoding
IEEE Transactions on Circuits and Systems for Video Technology
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
Motion- and aliasing-compensated prediction for hybrid video coding
IEEE Transactions on Circuits and Systems for Video Technology
Generalized B pictures and the draft H.264/AVC video-compression standard
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Context-based adaptive binary arithmetic coding in the H.264/AVC video compression standard
IEEE Transactions on Circuits and Systems for Video Technology
Rate-constrained coder control and comparison of video coding standards
IEEE Transactions on Circuits and Systems for Video Technology
H.264/AVC baseline profile decoder complexity analysis
IEEE Transactions on Circuits and Systems for Video Technology
Transform domain transcoding from MPEG-2 to H.264 with interpolation drift-error compensation
IEEE Transactions on Circuits and Systems for Video Technology
MPEG-2 to WMV Transcoder With Adaptive Error Compensation and Dynamic Switches
IEEE Transactions on Circuits and Systems for Video Technology
Overview of the Scalable Video Coding Extension of the H.264/AVC Standard
IEEE Transactions on Circuits and Systems for Video Technology
Annotation based personalized adaptation and presentation of videos for mobile applications
Multimedia Tools and Applications
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In this paper, we investigate transrating architectures for H.264/AVC video streams. Basic architectures are presented with their strengths and weaknesses. None of the existing architectures provide an appropriate solution for H.264/AVC transrating with an optimal balance between visual quality and complexity. In order to find such an appropriate solution, we propose the use of mixed transrating architectures. These architectures combine different transrating techniques which are applied depending on the picture/macroblock type. The intra-predicted pictures are decoded and re-encoded, while open-loop transrating or transrating with compensation is applied to motion-compensated pictures. Performance results show that the mixed architecture which applies spatial compensation to motion-compensated pictures gives rate-distortion results which approach the cascade of decoder and re-encoder with a complexity only slightly higher than the open-loop transrater. Adding temporal compensation for motion-compensated pictures further improves the visual quality, albeit to a lower extent, at the expense of increased complexity.