High-throughput H.264/AVC high-profile CABAC decoder for HDTV applications

Yao Chang Yang*, Jiun-In Guo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


In this letter we propose a high-throughput VLSI architecture design for H.264 high-profile context-based adaptive binary arithmatic coding (HP CABAC) decoding for HDTV applications. To speed up the inherent sequential CABAC decoding, we eliminate the bottleneck by proposing a look-ahead decision parsing technique on the grouped context table with cache registers, which reduces 62% of cycle count on average as compared with the original CABAC decoding. In addition, the proposed design supports the macroblock adaptive frame field coding tools in H.264 main profile coding and 8 × 8 transform in H.264 high-profile coding. It achieves the real-time processing for H.264 CABAC decoding up to L4.1@30 frames/s with maximum 60 Mbits/s when operating at 105 MHz.

Original languageEnglish
Article number4812002
Pages (from-to)1395-1399
Number of pages5
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number9
StatePublished - 1 Sep 2009


  • Context-based adaptive binary arithmatic coding (CABAC)
  • H.264
  • HDTV
  • Video coding

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