Discrete cosine transform method applicable to image coding and video coding
A technology of discrete cosine transform and video coding, which is used in image communication, digital video signal modification, television, etc., and can solve problems such as high implementation complexity
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Embodiment 1
[0036] The forward transformation butterfly diagram and the inverse transformation butterfly diagram are as follows figure 1 , figure 2 shown. (During actual implementation, different butterfly structures and implementation methods can be adopted as required.) figure 1 Among them, x0, x1, x2, x3, x4, x5, x6, and x7 are one-dimensional forward transformation input data, y0, y1, y2, y3, y4, y5, y6, y7 are one-dimensional forward transformation output data, SCALE f is the parameter determined when selecting the positive transformation matrix, e 0 , e 1 , e 2 , d 0 , d 1 , d 2 , d 3 , d 4 , d 5 , d 6 , d 7 , d 8 5 is a parameter determined according to the selected positive transformation matrix, and r is the rounding parameter after the positive transformation; figure 2 Among them, y0, y1, y2, y3, y4, y5, y6, and y7 are the input data of one-dimensional inverse transformation, x0, x1, x2, x3, x4, x5, x6, and x7 are the output data of one-dimensional inverse transf...
Embodiment 2
[0065] The forward transformation butterfly diagram and the inverse transformation butterfly diagram are as follows figure 1 , figure 2 shown. (During actual implementation, different butterfly structures and implementation methods can be adopted as required.) figure 1 Among them, x0, x1, x2, x3, x4, x5, x6, and x7 are one-dimensional forward transformation input data, y0, y1, y2, y3, y4, y5, y6, y7 are one-dimensional forward transformation output data, SCALE f is the parameter determined when selecting the positive transformation matrix, e 0 , e 1 , e 2 , d 0 , d 1 , d 2 , d 3 , d 4 , d 5 , d 6 , d 7 , d 8 is a parameter determined according to the selected positive transformation matrix, and r is a rounding parameter after positive transformation; figure 2 Among them, y0, y1, y2, y3, y4, y5, y6, and y7 are one-dimensional inverse transformation input data, x0, x1, x2, x3, x4, x5, x6, x7 are one-dimensional inverse transformation output data, SCALE i is the ...
Embodiment 3
[0094] The forward transformation butterfly diagram and the inverse transformation butterfly diagram are as follows figure 1 , figure 2 shown. (During actual implementation, different butterfly structures and implementation methods can be adopted as required.) figure 1 Among them, x0, x1, x2, x3, x4, x5, x6, and x7 are input data of one-dimensional forward transformation, y0, y1, y2, y3, y4, y5, y6, and y7 are output data of one-dimensional forward transformation, and SCALEf is selected Parameters determined when the matrix is being transformed, e 0 , e 1 , e 2 , d 0 , d 1 , d 2 , d 3 , d 4 , d 5 , d 6 , d 7 , d 8 is a parameter determined according to the selected positive transformation matrix, and r is a rounding parameter after positive transformation; figure 2 Among them, y0, y1, y2, y3, y4, y5, y6, and y7 are one-dimensional inverse transformation input data, x0, x1, x2, x3, x4, x5, x6, x7 are one-dimensional inverse transformation output data, SCALE i...
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