2D DCT Module¶
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jpegenc.subblocks.dct.dct_2d.dct_2d¶ 2D-DCT Module
This module performs the 2D-DCT Transformation. It takes serially the inputs of a NxN block and outputs parallely the transformed block in 64 signals. The row-column decomposition method used to implement the 2d-dct. The parameter num_fractional_bits is used to define the fractional bits for the fixed point representation of the coefficients. The stage_1_prec parameter defines the fractional bits for the fixed point representation of the 1st stage 1d-dct outputs. The out_prec defines the fractional bits for the ouputs of the 2d-dct and the N parameter defines the size of the NxN block.
- Inputs:
- data_in, data_valid, clock, reset
- Outputs:
- NxN signals in the list out_sigs, data_valid
- Parameters:
- num_fractional_bits, stage_1_prec, out_prec, N