Optimized algorithm of inverseddiscrete cosine transform based on RISC-DSP microprocessor
Weiguang Cai · Journal of Zhejiang University(Engineering Science) · 2006
To improve video image processing speed and utilization of processor resource,an optimized algorithm of inversed discrete cosine transform(IDCT) based on microprocessor with unifying architecture of reduced instruction set computer and digital signal processor(RISC-DSP) was introduced.The 8×8 IDCT algorithm in video image processing was analyzed based on the character of the instruction set architecture and then divided into two stages of matrix multiplication.The multimedia extended instructions of the RISC-DSP processor were applied to realize the IDCT calculation in two steps.Experimental results show that the algorithm only executes 530 instructions and occupies 1 424 bytes in memory when performing 8×8 IDCT calculation.The IDCT algorithm has relatively better practicability with higher real-time performance and less processor resource consumption.