Effectively detecting all-zero DCT blocks for H.264 optimization

Hanli WANG, Sam KWONG, Chi-Wah KOK

Research output: Book Chapters | Papers in Conference ProceedingsConference paper (refereed)Researchpeer-review

4 Citations (Scopus)


This paper presents a novel efficient algorithm to reduce redundant DCT and quantization computations for H.264 encoding. A theoretical analysis is performed to study the sufficient condition for DCT coefficients to be quantized to zeros in H.264. As a result, a more tight sufficient condition is derived to early detect all-zero 4x4 DCT blocks. Compared with other algorithms, the proposed algorithm provides a more precise and efficient condition to predict all-zero DCT blocks. The experimental results demonstrate that the proposed algorithm outperforms other algorithms in terms of all the evaluated performances. ©2006 IEEE.
Original languageEnglish
Title of host publicationProceedings of the 2006 International Conference on Image Processing
Number of pages4
ISBN (Print)1424404800
Publication statusPublished - 2006
Externally publishedYes
Event2006 IEEE International Conference on Image Processing - ATLANTA MARRIOTT MARQUIS, Atlanta, United States
Duration: 8 Oct 200611 Oct 2006


Conference2006 IEEE International Conference on Image Processing
Abbreviated titleICIP 2006
Country/TerritoryUnited States


  • All-zero DCT blocks
  • H.264
  • Integer DCT


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