A fast IDCT algorithm is applied for the speed optimization of the IDCT module, and MMX technology is also adopted to obtain higher decoding speed of the basic decoder on PC platform.

• 为了提高基本解码器的解码速度，本文对基本解码器中IDCT模块采用快速算法进行速度上的优化，并采用MMX技术进一步提高基本解码器在PC平台上的解码速度。