Prospects for Interactive Video-on-Demand
IEEE MultiMedia
Distance Learning with Digital Video
IEEE MultiMedia
A fast algorithm for DCT-domain inverse motion compensation
ICASSP '96 Proceedings of the Acoustics, Speech, and Signal Processing, 1996. on Conference Proceedings., 1996 IEEE International Conference - Volume 04
Transcoding-based error-resilient video adaptation for 3G wireless networks
EURASIP Journal on Advances in Signal Processing
Content-aware error-resilient transcoding using prioritized intra-refresh for video streaming
Journal of Visual Communication and Image Representation
Error resilience video transcoding for wireless communications
IEEE Wireless Communications
Motion vector refinement for high-performance transcoding
IEEE Transactions on Multimedia
IEEE Transactions on Multimedia
Video transcoding: an overview of various techniques and research issues
IEEE Transactions on Multimedia
Motion estimation for high performance transcoding
IEEE Transactions on Consumer Electronics
Extensions of ITU-T recommendation H.324 for error-resilient video transmission
IEEE Communications Magazine
Error-resilient transcoding for video over wireless channels
IEEE Journal on Selected Areas in Communications
Manipulation and compositing of MC-DCT compressed video
IEEE Journal on Selected Areas in Communications
New architecture for dynamic frame-skipping transcoder
IEEE Transactions on Image Processing
The MPEG-4 video standard verification model
IEEE Transactions on Circuits and Systems for Video Technology
A frequency-domain video transcoder for dynamic bit-rate reduction of MPEG-2 bit streams
IEEE Transactions on Circuits and Systems for Video Technology
Error-resilient video transcoding for robust internetwork communications using GPRS
IEEE Transactions on Circuits and Systems for Video Technology
Compressed-domain-based transmission distortion modeling for precoded H.264/AVC video
IEEE Transactions on Circuits and Systems for Video Technology
Error-resilient packet reordering for compressed video transmission over error-prone networks
Proceedings of the 7th International Conference on Ubiquitous Information Management and Communication
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In video applications where video sequences are compressed and stored in a storage device for future delivery, the encoding process is typically carried out without enough prior knowledge about the channel characteristics of a network. Error-resilient transcoding plays an important role to provide an addition of resilience to the video data, where or whenever it is needed. Recently, a reference picture selection (RPS) scheme has been adopted in an error-resilient transcoder in order to reduce error effects for the already encoded video bitstream. In this approach, the transcoder learns through a feedback channel about the damaged parts of a previously coded frame and then decides to code the next P-frame not relative to the most recent, but to an older, reference picture, which is known to be error-free in the decoder. One straightforward approach of adopting RPS in error-resilient transcoding is to decode all the P-frames from the previously nearest I-frame to the current transmitted frame which is then re-encoded with a new reference frame; this can create undesirable complexity in the transcoder as well as introduce re-encoding errors. In this paper, some novel techniques are suggested for an effective implementation of RPS in the error-resilient transcoder with the minimum requirement on its complexity. All the proposed techniques will manipulate video data in the compressed domain such that the computational loading of the transcoder is greatly reduced. By utilizing these new compressed-domain techniques, we develop a new structure to handle various types of macroblocks in the transcoder which re-uses motion vectors and prediction errors from the encoded bitstream. Experimental results demonstrate that significant improvements in terms of transcoder complexity and quality of reconstructed video can be achieved by employing our compressed-domain techniques.