February 27th, 2006 @ 11:50 pm
my brain hurts
Video/Imaging DesignLine | Video compression artifacts and MPEG noise reduction
MPEG-2 first exploits temporal redundancy through motion estimation and then proceeds to spatially subdivide the image in 8×8 blocks upon which the DCT (Discrete Cosine Transform) is applied to exploit spatial redundancy. Compression is done by quantizing resulting DCT coefficients and re-ordering them to maximize the probability of long runs of zeroes, and then run-length coded. Finally a Huffman encoding scheme is used. The whole process allows for great savings in terms of bit-rate ratio (>10:1).
My brain hurts after reading this article, but even with my limited (non-existent) knowledge of crazy math, its still an really interesting read. read it, then close your eyes for a few so your brain can calm down
