A low power motion estimation engine with adaptive bit-shifted SAD calculation

Takayuki Onishi, Yuya Omori, Ken Nakamura, Hiroe Iwasaki, Atsushi Shimizu

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

Abstract

This paper describes a motion estimation (ME) engine that achieves both power efficiency and coding quality for real-time ultra-high definition video encoders. Sum of absolute difference (SAD) calculations are performed with bit-shortened SAD engines to reduce power, and bit extraction positions are adaptively shifted in accordance with the flatness of picture luminance values to maintain calculation precision. Power simulations with a High Efficiency Video Coding encoder LSI design [2] show that the ME engine reduces power consumption by 18-39% with 4-bit shortened SAD calculation, while coding efficiency loss is suppressed by up to 57% with adaptive bit-shifting. The ME engine is especially effective for high dynamic range pictures with downscaled luminance values, which are suitable for today's 4K and 8K video contents.

Original languageEnglish
Title of host publication2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728103976
DOIs
Publication statusPublished - 2019
Externally publishedYes
Event2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019 - Sapporo, Japan
Duration: 2019 May 262019 May 29

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2019-May
ISSN (Print)0271-4310

Conference

Conference2019 IEEE International Symposium on Circuits and Systems, ISCAS 2019
Country/TerritoryJapan
CitySapporo
Period19/5/2619/5/29

Keywords

  • HEVC
  • Motion estimation
  • UHDTV
  • Video coding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A low power motion estimation engine with adaptive bit-shifted SAD calculation'. Together they form a unique fingerprint.

Cite this