Cited 0 time in webofscience Cited 2 time in scopus

Improved initial QP prediction method in H.264/AVC

Title
Improved initial QP prediction method in H.264/AVC
Authors
Kwon, Soon-youngLee, Sang-heonLee, Dong-ha
DGIST Authors
Kwon, Soon-young; Lee, Sang-heon; Lee, Dong-ha
Issue Date
2007-08-27
Citation
3rd International Conference on Mobile Multimedia Communications, MobiMedia 2007
Type
Conference
Article Type
Conference Paper
ISBN
9789630626705
Abstract
To improve video quality and coding efficiency, H.264/AVC adopted an adaptive rate control. But this method has a problem as it cannot predict an accurate quantization parameter (QP) for the first frame. The first QP is decided among four constant values by using encoder input parameters. It does not consider encoding bits, results in significant fluctuation of the image quality and decreases the average quality of the whole coded sequence. In this paper, we propose a new algorithm for the first frame QP decision in the H.264/AVC encoder. The QP is decided by the existing algorithm and the first frame is encoded. According to the encoded bits, the new initial QP is decided. We can predict optimal value because there is a linear relationship between encoded bits and the new initial QP. Next, we re-encode the first frame using the new initial QP. Experimental results show that the proposed algorithm not only achieves better quality than the state of the art algorithm, but also adopts a rate control for the sequence that was impossible with the existing algorithm. By reducing fluctuation, subjective quality also improved. Copyright 2007 ICST.
URI
http://hdl.handle.net/20.500.11750/4528
Publisher
Association for Computing Machinery, Inc
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of IoT∙Robotics Convergence Research2. Conference Papers
Convergence Research Center for Wellness2. Conference Papers
Convergence Research Center for Future Automotive Technology2. Conference Papers


qrcode mendeley

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE