DCT-Q-IDCT Discrete Cosinus Transform (DCT) based coding and decoding with display of statistical information
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DCT-Q-IDCT Ranking & Summary

DCT-Q-IDCT Tags

filter VirtualDub VirtualDub Filter Discrete Cosinus Transform inverse-DCT DCT statistical information statistical display discrete Discrete Fourier Transform display Fourier transform Discrete Cosine Transform 8x8 DCT

DCT-Q-IDCT Description

The DCT-Q-IDCT VirtualDub filter performs the folowing steps: color subsampling, blockwise forward DCT, matrix based quantization, source coding, inverse-DCT (IDCT), color upsampling. There is done a compression and decompression as in intraframe MPEG2 (I-Frames). You can use different quantization matrices and immediately see the effects on your video. Also you can check if your other filters in the chain improves the compression-ratio for a fixed quality (quantizer stepsize). It creates a compatible MPEG2 video sequence consisting of a single I-frame which can be saved in a file. Also statistical data about the input video is collected and a histogram can be created. This histogram shoes the distribution for each coefficient of the dct-transformed macroblocks, of the frames, which have been displayed.

DCT-Q-IDCT Related Software