A unified transform unit for H.264

Sehyun Song, Changwoo Seo, Kichul Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


This paper presents a unified transform unit that can perform forward integer transform, quantization, dequantization, integer transform, and hadamard in H.264/AVC. To reduce hardware cost, the proposed uses shifters, adder/subtractors instead of for quantization and de-quantization, and reuses 1-D unit for all supporting transforms. Hardware is maximized to achieve required performance with cost. It takes about 250 cycles to perform forward integer , quantization, de-quantization, and inverse integer for a macroblock, and additional 35 cycles for forward inverse hadamard transforms. The architecture can process 6,000 frames of QCIF at 150 MHz. The unified transform can be widely used in mobile devices.

Original languageEnglish
Title of host publication2008 International SoC Design Conference, ISOCC 2008
StatePublished - 2008
Event2008 International SoC Design Conference, ISOCC 2008 - Busan, Korea, Republic of
Duration: 24 Nov 200825 Nov 2008

Publication series

Name2008 International SoC Design Conference, ISOCC 2008


Conference2008 International SoC Design Conference, ISOCC 2008
Country/TerritoryKorea, Republic of


  • H.264
  • Hadamard transform
  • Hardware
  • Integer transform
  • Quantization


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