The Recursive Implementation Of The IMDCT In MPEG/Audio-1 Layerâ…¢

The MDCT and IMDCT are two of the most computational intensive operations in he MPEG/Audio. 1 LayerIII standard .They can transform the data from time field to the frequency field or from frequency field to the time field , thus we can easily encode , compression and to play the file in realtime . In the whole encode and decode system , they are both very important .With the emerge of all kinds of digital products, the technology of encode and decode are improving too . The study on the MDCT and IMDCT is deeper and deeper ,and there were many new fast implementations , but it is difficult to find a fast and fit to the VLSI in hardware.In this paper ,on the study of many traditional implementations ,we derive a new recursive way , it obeys the design rule of hardware .and we simulations ,synthesis and verify it by the new tool- DSP Builder . This gives the otheralgorithms a new solutions to implementation .