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motion vector Last modified: Monday, March 12, 2007

In video editing motion vectors are used to compress video by storing the changes to an image from one frame to the next. The process is a bi-dimensional pointer that communicates to the decoder how much left or right and up or down, the prediction macroblock is located from the position of the macroblock in the reference frame or field.

Motion Estimation Tutorial This page is intended to give the reader a basic understanding of what motion estimation is and how it fits into video compression as a whole. Motion Vector Applications We use these vectors creatively to detect and track motion and to find an alternative to traditional video decoding using phase shifting. motion-compensated coding (PDF) Prediction formulas and examples. Perceptual Coding: How Mp3 Compression Works The requirement that encoded video and audio must be retrievable from a medium delivering only 1.5 million bits per second dictated that one of the principal concerns of this document was data compression, since the transmission of uncompressed audio and video streams would require many more bits per second. WebVideoUniverse WebVideoUniverse takes you through the process of creating video for the Web, from shooting, to editing and encoding, to distributing and finally, to promoting your work. With tutorials, news and discussion, WebVideoUniverse helps you create professional videos for your Web site.