A Fine-grained Parallel Implementation of a H.264/AVC Encoder on a 167-processor Computational Platform

Zhibin Xiao
Stephen Le
Bevan M. Baas
VLSI Computation Laboratory
Department of Electrical and Computer Engineering
University of California, Davis

Abstract:

The emerging many-core architecture provides a flexible solution for the rapid evolving multimedia applications demanding both high performance and high energy-efficiency. However, developing parallel multimedia applications that can efficiently harness and utilize many-core architectures is the key challenge for scalable computing. We contribute to this challenge by presenting a fully-parallel H.264/AVC baseline encoder on a 167-core asynchronous array of simple processors(AsAP) computation platform. By exploiting fine-grained data and task level parallelism in the algorithms, we partition and map the dataflow of the H.264/AVC encoder to an array of 115 small processors coupled with two shared memories and a hardware accelerator for motion estimation. The proposed parallel H.264/AVC encoder is capable of encoding video sequences with variable frame sizes. The encoder presented is capable of encoding VGA (640x480) video at 21 frames per second (fps) with 931 mW average power consumption by adjusting each processor to workload-based optimal clock frequencies and dual supply voltages with less than 1dB loss in resolution.

Paper

Presentation

Reference

Zhibin Xiao, Stephen Le and B. M. Baas, "A Fine-grained Parallel Implementation of a H.264/AVC Encoder on a 167-processor Computational Platform," IEEE Asilomar Conference on Signals, Systems and Computers (ACSSC), Pacific Grove, CA, November 2011.

BibTeX Entry

@INPROCEEDINGS{ZBXiao:Asilomar2011,
   author={Zhibin Xiao and Stephen Le and B. M. Baas},
   booktitle={IEEE Asilomar Conference on Signals, Systems and Computers (ACSSC)}, 
   title={A Fine-grained Parallel Implementation of a H.264/AVC Encoder on a 167-processor Computational Platform},
   year={2011},
   month={Nov.}.

}

VCL Lab | ECE Dept. | UC Davis

Last update: Nov. 17, 2011