Title :
A lossless frame recompression scheme for reducing DRAM power in video encoding
Author :
Bao, Xuena ; Zhou, Dajiang ; Goto, Satoshi
Author_Institution :
Grad. Sch. of Inf., Waseda Univ., Kitakyushu, Japan
fDate :
May 30 2010-June 2 2010
Abstract :
Owing to the huge bandwidth requirement, the DRAM power composes a significant portion of the power consumed by video coding system. In this paper, a lossless frame recompression scheme for reducing DRAM bandwidth is presented. The basic structure of the scheme which includes the memory organization, the data fetching strategy as well as the cache organization is proposed. Furthermore, an adaptive DPCM (Differential Pulse Code Modulation) scanning order selection is used and an efficient coding method that is suitable for compressing the DPCM samples in reference frames is also discussed. Experimental results show a 50%~60% saving of bandwidth on 720p and 1080p sequences, which indicates that the proposed scheme can be useful in reducing the system power through saving DRAM bandwidth.
Keywords :
DRAM chips; cache storage; data compression; differential pulse code modulation; video coding; DRAM bandwidth reduction; DRAM power reduction; adaptive DPCM scanning order selection; cache organization; data fetching strategy; differential pulse code modulation; lossless frame recompression scheme; memory organization; video coding system; video encoding; Bandwidth; Encoding; Modulation coding; Motion estimation; Production systems; Pulse compression methods; Pulse modulation; Random access memory; Video codecs; Video coding;
Conference_Titel :
Circuits and Systems (ISCAS), Proceedings of 2010 IEEE International Symposium on
Conference_Location :
Paris
Print_ISBN :
978-1-4244-5308-5
Electronic_ISBN :
978-1-4244-5309-2
DOI :
10.1109/ISCAS.2010.5537495
