I am writing decompressor for jpeg files I know that it's very complex process but anyway I have read this tutorial http://www.impulseadventure.com/photo/jpeg-huffman-coding.html it was very useful until I reached this
期望图像内容是3个成分(Y,Cb,Cr).在每个组件内,序列始终是一个DC值,后跟63个AC值.
那么DC和AC的含义是什么？