What are various coding techniques?
There are three main types of digital coding techniques used for compression of input video signal. These are as follows: Intraframe coding: It removes redundant information from within a single video frame. Interframe coding: It compares each frame with the previous frame, and transmits only the parts that have changed. Predictive coding: On the basis of prediction of change in the video sequence, the codec transmits only that portion of the frame that has changed. To get a good quality image, combinations of all the three techniques are used in a codec. Data transmission rate (the transmission speed of Channel) is another factor that affects the video quality, since compression ratio depends on the transmission speed.
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