Dynamic region of interest transcoding for multipoint video conferencing

@article{tcsvt03-lin-dynamic, abstract = {This paper presents a region of interest transcoding scheme for multipoint video conferencing to enhance visual quality. In a multipoint video conference, usually there are only one or two active conferees at one time, which are the regions of interest to the other conferees involved. We propose a dynamic sub-window skipping scheme to firstly identify the active participants from the multiple incoming encoded video streams by calculating the motion activity of each sub-window and then dynamically reduce the frame rates of the motion inactive participants by skipping these less-important sub-windows. The bits saved from the skipping operation are reallocated to the active sub-windows to enhance the regions of interest. We also propose a low-complexity scheme to compose, as well as trace, the unavailable motion vectors with a good accuracy in the dropped inactive sub-windows after performing sub-window skipping. Simulation results show that the proposed methods not only significantly improve the visual quality of the active sub-windows without introducing serious visual quality degradation in the inactive ones, but also reduce the computational complexity and avoid whole-frame skipping. Moreover, the proposed algorithm is fully compatible with the H.263 video coding standard.}, author = {Lin, Chia-Wen and Chen, Yung-Chang and Sun, Ming-Ting }, booktitle = {Circuits and Systems for Video Technology, IEEE Transactions on}, citeulike-article-id = {2822178}, doi = {10.1109/TCSVT.2003.816505}, journal = {Circuits and Systems for Video Technology, IEEE Transactions on}, keywords = {conferencing, transcoding, video}, number = {10}, pages = {982--992}, posted-at = {2008-05-22 05:56:42}, priority = {2}, title = {Dynamic region of interest transcoding for multipoint video conferencing}, url = {http://dx.doi.org/10.1109/TCSVT.2003.816505}, volume = {13}, year = {2003} }

TY - JOUR ID - tcsvt03-lin-dynamic L3 - citeulike-article-id:2822178 TI - Dynamic region of interest transcoding for multipoint video conferencing T2 - Circuits and Systems for Video Technology, IEEE Transactions on JF - Circuits and Systems for Video Technology, IEEE Transactions on VL - 13 IS - 10 SP - 982 EP - 992 N2 - This paper presents a region of interest transcoding scheme for multipoint video conferencing to enhance visual quality. In a multipoint video conference, usually there are only one or two active conferees at one time, which are the regions of interest to the other conferees involved. We propose a dynamic sub-window skipping scheme to firstly identify the active participants from the multiple incoming encoded video streams by calculating the motion activity of each sub-window and then dynamically reduce the frame rates of the motion inactive participants by skipping these less-important sub-windows. The bits saved from the skipping operation are reallocated to the active sub-windows to enhance the regions of interest. We also propose a low-complexity scheme to compose, as well as trace, the unavailable motion vectors with a good accuracy in the dropped inactive sub-windows after performing sub-window skipping. Simulation results show that the proposed methods not only significantly improve the visual quality of the active sub-windows without introducing serious visual quality degradation in the inactive ones, but also reduce the computational complexity and avoid whole-frame skipping. Moreover, the proposed algorithm is fully compatible with the H.263 video coding standard. KW - conferencing KW - transcoding KW - video AU - Lin, Chia-Wen AU - Chen, Yung-Chang AU - Sun, Ming-Ting PY - 2003/// UR - http://dx.doi.org/10.1109/TCSVT.2003.816505 ER -