The Analysis And Structure Design Of DCT Algorithm

H.264 is a new generation of video coding standard developed by developed by ITU and ISO. The new standard has characters such as low bit rate, high quality picture, time-delay adaptive ability and strong error fix ability. Though H.264 is better than the video coding standard before, the advantage of H.264 comes from the more sophisticated algorithm and the higher hardware support, Its time the code and the decode taken is many times of the video coding standard before. The research of the critical algorithm and its implementation in H.264 coder and decoder is very helpful for the application.In H.264, the 4×4 block and 8×8 block integer cosine transform are used. This can help to reduce the complexity in coding and decoding. Avoid the mismatch between the DCT and IDCT.In this design,researching the DCT algorithm based on H.264 video coding standard, using the row-coulmn analyze to implement the two-dimension DCT, and using the fast algorithm to improve the rate. Research on the 4-2 compression and carry look-ahead adder, and take them into the two-level adder to improve the rate.In H.264, the different-lay coding is used to improve the quality. After the DCT transformation, take Hadamard transformation to the DC of the macro block. Compare the characteristic of DCT and Hadamard, reuse the Hadamard to save the area.Improve the rate by optimizing the adder...