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Line 14: === Quantization matrices === A quantization matrix is used in combination with a DCT coefficient matrix to carry out the previously mentioned ~~transform~~transformation. Quantization matrices are often specifically designed to keep certain frequencies in the source to avoid losing image quality. Many video encoders, such as [[Xvid]] and [[H.264/AVC]] allow custom matrices to be used. This is an example DCT coefficient matrix: <!--NOTE: this matrix was generated using random numbers and the other two matricies. It may not actually work well with an iDCT. -->

Quantization (image processing): Difference between revisions