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Introduction to Digital Video, 2nd Edition by John Watkinson

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Chapter 5

Video compression and MPEG

5.1 Introduction to compression

Compression allows the same (or nearly the same) information to be represented by a smaller quantity or rate of data. There are several reasons why compression techniques are popular:

1  Compression extends the playing time of a given storage device.

2  Compression allows miniaturization. With less data to store, the same playing time is obtained with smaller hardware. This is useful in ENG (electronic news gathering) and consumer devices.

3  Tolerances can be relaxed. With fewer data to record, storage density can be reduced making equipment which is more resistant to adverse environments and which requires less maintenance.

4  In transmission systems, compression allows a ...

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