Video transcoding for universal multimedia access

This paper discusses the issue of adapting video streams to different type of terminals with different terminal capabilities such as screen size, amount of available memory, processing power and type of network access. This functionality will be very useful for the Universal Multimedia Access application related to MPEG-7 standardization activities. Two different models for transcoding are examined, rate reduction and resolution reduction. Results will show that the computational complexity of the basic transcoding model can be reduced for each model by, on average, 39% and 23% without significant loss in quality. Comparisons with the scaleable coding model are also shown.

[1]  Huifang Sun,et al.  Architectures for MPEG compressed bitstream scaling , 1995, Proceedings., International Conference on Image Processing.

[2]  Vasudev Bhaskaran,et al.  A fast approximate algorithm for scaling down digital images in the DCT domain , 1995, Proceedings., International Conference on Image Processing.

[3]  Shih-Fu Chang,et al.  Manipulation and Compositing of MC-DCT Compressed Video , 1995, IEEE J. Sel. Areas Commun..

[4]  Itu-T.  Video coding for low bitrate communication , 1996 .

[5]  Konstantinos Konstantinides,et al.  Image and video compression standards - algorithms and architectures, Second Edition , 1997, The Kluwer international series in engineering and computer science.

[6]  Lurng-Kuo Liu,et al.  A block-based gradient descent search algorithm for block motion estimation in video coding , 1996, IEEE Trans. Circuits Syst. Video Technol..

[7]  Konstantinos Konstantinides,et al.  Image and Video Compression Standards: Algorithms and Architectures , 1997 .

[8]  Konstantinos Konstantinides,et al.  Image and video compression standards , 1995 .

[9]  Charilaos Christopoulos,et al.  Transcoder architectures for video coding , 1998 .

[10]  Charilaos Christopoulos,et al.  Transcoder architectures for video coding , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[11]  Gertjan Keesman,et al.  Transcoding of MPEG bitstreams , 1996, Signal Process. Image Commun..

[12]  Mohammed Ghanbari,et al.  Post-processing of MPEG2 coded video for transmission at lower bit rates , 1996, 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings.