File compression

Slide 22

Why important?

• To save time for data transmission.

• To save HD space.

ex)

a) Original image by NTSC : 901KB=7248Kb

b) with 1/10 compression : 90.1KB=724.8Kb

Transmission over ISDN (128kb/s)

image a) 56.5 s/image

image b) 5.65 s/image

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