Pre-processor of the region-of-interest based H.264 encoder for low power application

Minghui Wang*, Tianruo Zhang, Satoshi Goto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)


As the state-of-the-art of the modern video compression standard, H264 shows a high coding performance. Introducing the motion estimation method, it has ten times computation comparing to MPEG2. The high computational requirement makes it hard to implement on portable devices. According to the human visual system (HVS) research, human eyes can only focus on one area in a frame, which is called region-of-interest (ROI). This phenomenon gives a chance to code all macro blocks (MB) unequally. In this work a ROI detector is involved as a pre-processor of the encoder. Although the ROI corresponding the global information, the proposed design makes the detection processes pixel by pixel. It saves the memory to meet the limited hardware resource. The pre-processor itself do not cost much hardware and power, while according to the simulation result, in the system level the ROI based encoder can save 60% computation compare to the standard H264 encoder design.

Original languageEnglish
Title of host publicationASICON 2009 - Proceedings 2009 8th IEEE International Conference on ASIC
Number of pages4
Publication statusPublished - 2009
Event2009 8th IEEE International Conference on ASIC, ASICON 2009 - Changsha
Duration: 2009 Oct 202009 Oct 23


Other2009 8th IEEE International Conference on ASIC, ASICON 2009


  • H.264
  • Pre-process
  • Region-of-interest
  • ROI

ASJC Scopus subject areas

  • Hardware and Architecture
  • Electrical and Electronic Engineering


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