Title :
A Unified 4/8/16/32-Point Integer IDCT Architecture for Multiple Video Coding Standards
Author :
Shen, Sha ; Shen, Weiwei ; Fan, Yibo ; Zeng, Xiaoyang
Author_Institution :
State Key Lab. of ASIC & Syst., Fudan Univ., Shanghai, China
Abstract :
4 or 8-point IDCT are widely used in traditional video coding standards. However larger size (16/32-point) IDCT has been proposed in the next generation video standard such as HEVC. To fulfill this requirement, this work proposes a fast computational algorithm of large size integer IDCT. A unified VLSI architecture for 4/8/16/32-point integer IDCT is also proposed accordingly. It can support the following video standards: MPEG-2/4, H.264, AVS, VC-1 and HEVC. Multiplier less MCM (Multiple Constant Multiplication) is used for 4/8-point IDCT. The regular multipliers and sharing technique are used for 16/32-point IDCT. The transpose memory uses SRAM instead of the traditional register array in order to further reduce the hardware overhead. It can support real-time decoding of 4K×2K (4096×2048) 30fps video sequence at 191MHz working frequency, with 93K gate count and 18944-bit SRAM. We suggest a normalized criterion called design efficiency to compare with previous works. It shows that this design is 31% more efficient than previous work.
Keywords :
SRAM chips; VLSI; discrete cosine transforms; image sequences; video coding; AVS; H.264; MPEG-2/4; SRAM; VC-1; discrete cosine transforms; frequency 191 MHz; high efficient video coding; multiple constant multiplication; multiple video coding standards; multiplier less MCM; next generation video standard; real-time decoding; regular multipliers; transpose memory; unified 4/8/16/32-point integer IDCT architecture; unified VLSI architecture; video sequence; word length 18944 bit; Adders; Computer architecture; Hardware; Random access memory; Registers; Standards; Transforms; HEVC; IDCT; Multiplierless MCM; integer transform; multiple standards; video coding;
Conference_Titel :
Multimedia and Expo (ICME), 2012 IEEE International Conference on
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4673-1659-0
DOI :
10.1109/ICME.2012.7