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Unified FPGA Design for the hevc Dequantization and Inverse Transform Modules

Computers, Materials & Continua 2022年第6期71卷 4319-4335页

作者： Turki M.Alanazi Ahmed Ben Atitallah Department of Electrical Engineering Jouf UniversitySakakaAljouf2014Saudi Arabia

As the newest standard,the High Efficiency Video Coding(hevc)is specially designed to minimize the bitrate for video data transfer and to support High Definition(HD)and ULTRA HD video resolutions at the cost of increasing computational complexity relative to earlier standards like the ***,real-time video decoding with hevc decoder becomes a challenging ***,the Dequantization and Inverse Transform(DE/IT)are one of the computationally intensive modules in the hevc decoder which are used to reconstruct the residual ***,in this paper,a unified hardware architecture is proposed to implement the hevc DE/IT module for all Transform Unit(TU)block size,including 4×4,8×8,16×16 and 32×*** architecture is designed using the High-Level Synthesis(HLS)and the Low-Level Synthesis(LLS)methods in order to compare and determine the best method to implement in real-time the DE/IT *** fact,the C/C++programming language is used to generate an optimized hardware design for DE/IT module through the Xilinx Vivado HLS *** the other hand,the LLS hardware architecture is designed by the VHSIC Hardware Description language(VHDL)and using the pipeline technique to decrease the processing *** experimental results on the Xilinx XC7Z020 FPGA show that the LLS design increases the throughput in term of frame rate by 80%relative to HLS design with a 4.4%increase in the number of Look-Up Tables(LUTs).Compared with existing related works in literature,the proposed architectures demonstrate significant advantages in hardware cost and performance improvement.

关键词： hevc decoder dequantization IDCT/IDST LLS design HLS design FPGA

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