Method and apparatus for inverse discrete cosine transform implementation
A technology of reverse discrete cosine and discrete cosine transformation, which is applied in special data processing applications, complex mathematical operations, instruments, etc., and can solve problems such as complex memory structures and difficult control
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[0057] figure 1 A data flow diagram for generating DCT data corresponding to the present invention is shown. Generally speaking, the input of the data processing device 100 according to the present invention is the DCT data 110 generated by a prior-stage (Prior-stage) system 10 . The main function of the front-end system 10 is to receive and process a bit stream (Bit stream), which contains data to be processed by the IDCT program of the present invention. The front-end system 10 generally includes a controller 12 , a variable length decoder 14 , an inverse scan buffer 16 and an inverse quantization circuit 18 . The variable length decoder 14 receives the bit stream 20 and decodes the data in the bit stream 20 , and then generates a run information (Run information) 11 and a level information (Level information) 13 . The trend information 11 and the level information 13 are well known to those who understand DCT and IDCT techniques. Since the above information is not import...
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