ISO/IEC – Information technology – Generic coding of moving pictures and associated audio information – Part 2: Video. Amendment 2 to International Standard ISO/IEC was prepared by. Joint Technical Committee ISO/IEC JTC 1, Information technology, Sub-. ISO/IEC. Third edition. Information technology — Generic coding of moving pictures and associated audio information —. Part 2: Video.
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Also, because of the way the eye works, it is 1818-2 to delete some data from video pictures with almost no noticeable degradation in iiso quality. Multimedia compression and container formats. If the video is not interlaced, then it is called progressive video and each picture is a frame. A main stream can be recreated losslessly.
Another common practice to reduce the amount of data to be processed is to subsample the two chroma planes after low-pass filtering to avoid aliasing.
Systems Program stream Part 2: Next, the quantized coefficient matrix is itself compressed. Reference Software Part 5: Retrieved from ” https: Views Read Edit View history. A Main stream cannot be recreated losslessly.
Use dmy dates from July Digital Item Part 5: To correct for this, the encoder takes the difference of all corresponding pixels of the two macroblocks, and on that macroblock difference then computes the strings of coefficient values as isoo above.
An I-frame ieo a compressed version of a single uncompressed raw frame. By starting in the opposite corner of the matrix, then zigzagging through the matrix to combine the coefficients into a string, then substituting run-length codes for consecutive zeros in that string, and then applying Huffman coding to that result, one reduces the matrix to a smaller array of numbers.
H.262/MPEG-2 Part 2
High Efficiency Video Coding Part 3: This works because the human visual system better resolves details of brightness than details in the hue and saturation of colors. Retrieved 24 July A profile defines sets of features such as B-pictures, 3D video, chroma isp, etc.
H/MPEG-2 Part 2 – Wikipedia
The match between the two macroblocks will often not be perfect. Video based on H. MPEG-2 supports all three sampling types, although 4: This “residual” is appended to the motion vector and the result sent to the receiver or stored on the DVD for each macroblock being compressed. Unlike P-frames and B-frames, I-frames do not depend on data in the preceding or the following frames. Many of the coefficients, usually the higher frequency components, will then be zero.
Sometimes no suitable match is found.