A Dynamic Search Range Algorithm for Stabilized Reduction of Memory Traffic in Video Encoder
- Resource Type
- Periodical
- Authors
- Jung, J.; Kim, J.; Kyung, C.-M.
- Source
- IEEE Transactions on Circuits and Systems for Video Technology IEEE Trans. Circuits Syst. Video Technol. Circuits and Systems for Video Technology, IEEE Transactions on. 20(7):1041-1046 Jul, 2010
- Subject
- Components, Circuits, Devices and Systems
Communication, Networking and Broadcast Technologies
Computing and Processing
Signal Processing and Analysis
Dynamic range
Heuristic algorithms
Bandwidth
Motion estimation
Video coding
Video compression
Fluctuations
Automatic voltage control
Video codecs
Image quality
Dynamic search range (DRS)
embedded compression
H.264/advanced video coding (AVC)
memory bandwidth
- Language
- ISSN
- 1051-8215
1558-2205
Embedded compression is commonly employed in a video codec to reduce the data traffic to/from off-chip frame memory. We proposed a method for maintaining the memory bandwidth requirement at a significantly reduced level through dynamic search range adjustment for the motion estimation based on the observed relationship between the compression ratio and the motion vector. This, together with the so-called “center moving” to adjust the newly incoming macroblocks, helped significantly lower the requirement of the memory bandwidth without a fluctuation. Experimental results have shown that the memory bandwidth requirement can be finally stabilized to 20% of that of the full search. The image quality degradation was merely 0.02 dB.