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Video File Compression

Used to display video on the PC by

Reducing number of frames displayed per second.

Number of frames per second affects the smoothness of the video.

High quality video displays 30 frames/sec and low quality 10-15/sec

Reducing  the size of the video widow.

Displaying an image 1/4 of the screen requires only 1/4 of the data required to display on a screen.

The above technique is Intra frame Compression

Coding only the changes that take place one frame to next

difference between frames are evaluated and the data changed are stored.

The above technique is termed as motion compensation.

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