PolyU Institutional Repository >
Electronic and Information Engineering >
EIE Journal/Magazine Articles >
Please use this identifier to cite or link to this item:
|Title: ||New architecture for MPEG video streaming system with backward playback support|
|Authors: ||Fu, Chang-hong|
|Subjects: ||Compressed-domain processing|
Digital video cassette recording
|Issue Date: ||Sep-2007 |
|Citation: ||IEEE Transactions on image processing, Sept. 2007, v. 16, no. 9, p.2169-2183.|
|Abstract: ||MPEG digital video is becoming ubiquitous for video storage and communications. It is often desirable to perform various video cassette recording (VCR) functions such as
backward playback in MPEG videos. However, the predictive processing techniques employed in MPEG severely complicate
the backward-play operation. A straightforward implementation of backward playback is to transmit and decode the whole
group-of-picture (GOP), store all the decoded frames in the decoder buffer, and play the decoded frames in reverse order.
This approach requires a significant buffer in the decoder, which depends on the GOP size, to store the decoded frames. This
approach could not be possible in a severely constrained memory requirement. Another alternative is to decode the GOP up to the current frame to be displayed, and then go back to decode the GOP again up to the next frame to be displayed. This approach does not need the huge buffer, but requires much higher bandwidth of the network and complexity of the decoder. In this paper, we propose a macroblock-based algorithm for an efficient implementation of the MPEG video streaming system to provide backward playback over a network with the minimal requirements on the network bandwidth and the decoder complexity. The proposed algorithm classifies macroblocks in the requested frame into backward macroblocks (BMBs) and forward/backward macroblocks (FBMBs). Two macroblock-based techniques are used to manipulate different types of macroblocks in the compressed domain and the server then sends the processed macroblocks
to the client machine. For BMBs, a VLC-domain technique is adopted to reduce the number of macroblocks that need to be
decoded by the decoder and the number of bits that need to be sent over the network in the backward-play operation. We then
propose a newly mixed VLC/DCT-domain technique to handle FBMBs in order to further reduce the computational complexity
of the decoder. With these compressed-domain techniques, the proposed architecture only manipulates macroblocks either in the VLC domain or the quantized DCT domain resulting in low server complexity. Experimental results show that, as compared to the conventional system, the new streaming system reduces the required network bandwidth and the decoder complexity
|Rights: ||© 2007 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.|
This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.
|Type: ||Journal/Magazine Article|
|Appears in Collections:||EIE Journal/Magazine Articles|
All items in the PolyU Institutional Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
No item in the PolyU IR may be reproduced for commercial or resale purposes.