Journal of VLSI Signal Processing Systems
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
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
Video transcoding: an overview of various techniques and research issues
IEEE Transactions on Multimedia
Digital color decoder for PIP-applications
IEEE Transactions on Consumer Electronics
High performance picture-in-picture (PIP) IC using embedded DRAM technology
IEEE Transactions on Consumer Electronics
IEEE Transactions on Consumer Electronics
System-on-silicon solution for high quality consumer video processing-the next generation
IEEE Transactions on Consumer Electronics
Video quality-of-service for consumer terminals - a novel system for programmable components
IEEE Transactions on Consumer Electronics
Fast motion re-estimation for arbitrary downsizing video transcoding using H.264/AVC standard
IEEE Transactions on Consumer Electronics
Performance evaluation of transcoding algorithms for H.264
IEEE Transactions on Consumer Electronics
A short overview of the VDSL system requirements
IEEE Communications Magazine
Manipulation and compositing of MC-DCT compressed video
IEEE Journal on Selected Areas in Communications
IEEE Transactions on Circuits and Systems for Video Technology
Local bandwidth constrained fast inverse motion compensation for DCT-domain video transcoding
IEEE Transactions on Circuits and Systems for Video Technology
IEEE Transactions on Circuits and Systems for Video Technology
Requantization transcoding for H.264/AVC video coding
Image Communication
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This paper proposes a low-complexity multiple-window video embedding transcoder (MW-VET) based on H.264/AVC standard for various applications that require video embedding services including picture-in-picture (PIP), multichannel mosaic, screen-split, pay-per-view, channel browsing, commercials and logo insertion, and other visual information embedding services. The MW-VET embeds multiple foreground pictures at macroblock-aligned positions. It improves the transcoding speed with three block level adaptive techniques including slice group based transcoding (SGT), reduced frame memory transcoder (RFMT), and syntax level bypassing (SLB). The SGT utilizes prediction from the slice-aligned data partitions in the original bitstreams such that the transcoder simply merges the bitstreams by parsing. When the prediction comes from the newly covered area without slice-group data partitions, the pixels at the affected macroblocks are transcoded with the RFMT based on the concept of partial reencoding to minimize the number of refined blocks. The RFMT employs motion vector remapping (MVR) and intra mode switching (IMS) to handle intercoded blocks and intracoded blocks, respectively. The pixels outside the macroblocks that are affected by newly covered reference frame are transcoded by the SLB. Experimental results show that, as compared to the cascaded pixel domain transcoder (CPDT) with the highest complexity, our MW-VET can significantly reduce the processing complexity by 25 times and retain the rate-distortion performance close to the CPDT. At certain bit rates, the MW-VET can achieve up to 1.5 dB quality improvement in peak signal-to-noise-ratio (PSNR).