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http://hdl.handle.net/1783.1/2557
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| Title: | Parameter estimation for image/video transcoding |
| Authors: | Guo, Zihua
Au, Oscar C.
Letaief, K. B. |
| Keywords: | Image
Video
Compression standard
Transcoding system
DCT |
| Issue Date: | May-2000 |
| Citation: | 2000 IEEE International Symposium on Circuits and Systems (ISCAS 2000), Geneva, 28-31 May 2000, vol. 2, p. 269-272 |
| Abstract: | In most of the current image/video compression standard, such as JPEG, MPEG, H.263, etc, the DCT is used. The DCT coefficients for every AC frequency component usually have Laplacian distribution. Such a distribution is critical in the image or video transcoding system [5]. Therefore, the parameter in the distribution should be well estimated. Different from the normal parameter estimation, in the transcoding system, the original DCT value is unavailable, and only the dequantized value is available. In this paper, we will propose 3 estimation methods based on the dequantized value, specially, for the transcoding system. The simulation will demonstrate that they can yield very good results. In addition, under a fixed bit rate, they can work even better than estimation with the original DCT value in the sense of image/frame's PSNR. |
| Rights: | © 2000 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. |
| URI: | http://hdl.handle.net/1783.1/2557 |
| Appears in Collections: | ECE Conference Papers
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| para.pdf | pre-published version | 412Kb | Adobe PDF | View/Open |
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