In video coding and in particular MPEG-2 there is the use of the Discrete Cosine Transform, if I am given the 8x8 amplitude block is there an easy way calculate the requantization values ?
Also what is the importance of zig-zag scanning?
2007-05-22 11:57:10 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Yes, if someone gives you the quantization factor and the quantized data you can reconstruct the original data (of course, due to quantization, you may not get the exact data, that's why it is called lossy compression).
Before the quantized data are sent to the Huffman codec for some lossless compression, they are ordered in zig-zag order to increase compression efficiency.
2007-05-25 18:16:19 · answer #1 · answered by TV guy 7 · 0⤊ 0⤋
Are you serious?
This explanationis way TOOOOOOlong to put here.
sorry.. maybe see you for coffee and we can chat it up!
2007-05-24 01:24:13 · answer #2 · answered by Anonymous · 0⤊ 0⤋