Affiliation:
1. Communication University of China
Abstract
In block transform based coding, coefficients scanning plays an important role in improving compression performance. A good scanning method has great potential to remove statistical redundancy, as it can apply an energy compaction coefficients vector. In this paper, a mode-dependent (MD) coefficients scanning method is introduced, with the idea of reducing the overall bit rate by adopting side information to coding mode indexes. In the experiment, we design 128 MD scanning tables according to the DCT coefficients energy distribution, and explore the relationship between the number of scanning table used and the bit saving in image coding. The results provide reference to choose scanning modes by considering the trade-off of the increasing of side information and the decrease of data redundancy.
Publisher
Trans Tech Publications, Ltd.
Reference12 articles.
1. ISO/IEC 10918-1 and ITU-T Recommendation T. 81, Information technology- Digital compression and coding of continuous-tone still images: Requirements and guidelines, (1994).
2. T. Wiegand, G. J. Sullivan, G. Bjontegaard, and A. Luthra, Overview of the H. 264/AVC video coding standard, IEEE Trans. Circuits Syst. Video Technol., vol. 13, pp.560-576, (2003).
3. Y. L. Lee, K. H. Han, D. G. Sim, and J. Seo, Adaptive scanning for H. 264/AVC intra coding, ETRI Journal, vol. 28, no. 5, pp.694-696, Oct. (2006).
4. H. H. Chen, Y. W. Huang, and J. J. Ding, Local Prediction based adaptive scanning for JEPG and H264/AVC inter coding, ICIP , pp.1636-1640, Oct. (2013).
5. Q. C. Sun, X. Y. Wu, and L. Yu, An adaptive coefficient scanning scheme for inter-prediction coding, Picture Coding Symposium, Nov. (2007).