Circuit and method based on AVS motion compensation interpolation
A brightness interpolation and motion compensation technology, applied in the field of audio and video digital codec, can solve the problems of low parallelism of interpolation operation, increased pipeline improvement effect, and high memory access pressure, and achieves reduced complexity, reduced waiting time, The effect of reducing access pressure
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Embodiment 1
[0055] A circuit based on AVS motion compensation brightness interpolation operation, such as figure 1 As shown, it includes integer pixel memory I1, integer pixel memory II2, bh type pixel memory 3, j type pixel memory 4, memory interface module 5, 1 / 2 pixel interpolation filter 6, 1 / 4 pixel interpolation filter 7, multiple Way selector (MUX) 8 and adjustment limiter 9, it is characterized in that the output end of integer pixel memory I1, integer pixel memory II2, bh class pixel memory 3 and j class pixel memory 4 is connected to the input end of memory interface module 5 ; The output end of memory interface module 5 is connected to the input end of 1 / 2 pixel interpolation filter 6 and 1 / 4 pixel interpolation filter 7 respectively; 1 / 2 pixel interpolation filter 6 and 1 / 4 pixel interpolation filter 7 The output end is connected to the input end of multiplexer 8 respectively; The output end of 1 / 2 pixel interpolation filter 6 is respectively connected to the input end of bh c...
Embodiment 2
[0065] A kind of method utilizing above-mentioned circuit to carry out based on AVS motion compensation luminance interpolation operation such as Figure 8 As shown, the steps are as follows:
[0066] (1) Send the pixel block to be interpolated to the integer pixel memory I / II;
[0067] (2) use 1 / 2 pixel interpolation filter to find horizontal and vertical half pixel points to the pixel value in the integer pixel memory I / II;
[0068] (3) use the 1 / 2 pixel interpolation filter to obtain the diagonal half-pixel point to the pixel value in the bh class pixel memory; obtain the vertical or horizontal half-pixel point intermediate value to step (2), use filter F1, select the same row / Filter the nearest 4 half-pixel values to obtain the intermediate value j';
[0069] (4) Use the 1 / 4 pixel interpolation filter to filter integer pixels or half pixels to find 1 / 4 pixel points; for a, c, d, n, i, k, f, q position points in the AVS standard, use Filter F2 filters the nearest 4 inte...
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