| | |
Summary: Interframe Bus Encoding Technique for Low Power Video Compression
Asral Bahari, Tughrul Arslan and Ahmet T. Erdogan
School of Engineering and Electronics, University of Edinburgh
United Kingdom
Email: {a.bahari, tughrul.arslan, ahmet.erdogan}@ed.ac.uk
Abstract
This paper proposes a data encoder to reduce switched
capacitance on system bus. Our method focuses on
transferring raw video data (pixels) between off-chip
memory and on-chip memory which is common in video
compression applications. This method is based on en-
tropy coding to minimize bus transition. The existing
technique exploits the correlation between neighbour-
ing pixels. In our technique, we exploit pixel correlation
between two consecutive frames. Our method shows
54% transition saving when combined with the existing
technique which is equivalent to 38% power saving for
15pF off-chip bus capacitance. This method is suitable
for applications where multiple frames are transferred
from off-chip memories such as in MPEG-4 AVC/H.264
|
