【摘要】 为了提高H.264算法的执行效率,在基于Blackfin533的嵌入式系统中对其进行了优化实现。该方法充分考虑了Black-fin533的系统资源和指令特点,利用其并行操作和向量操作指令,对整数变换算法进行了汇编优化。优化后的程序在VDSP++4.5软件环境中编译运行,利用环境查看指令周期功能,测试优化程序的执行速度。测试结果表明,与X.264代码中标准算法比较,优化后的汇编代码执行速度提高了近4倍。更多还原

【Abstract】 The integer transform implementation is optimized based on the Blackfin533 according to integer transform algorithm in H.264.Blackfin533 system resources and the feature of Blackfin533 instructions are considered.Parallel and vector instructions are used to optimize the algorithm.The optimized program runs in VDSP++4.5 software environment and executive efficiency of the program is tested using the function of testing cycles.It is proved that executive efficiency of the assembler that is optimized is increased significantly compared with the integer transform in X.264.更多还原