Question

Suppose that a digitized colour TV picture is to be transmitted from a source that uses a matrix of 800 X 600 picture elements (pixels), where each pixel can take on one of 256 intensity values. Assume that 28 frames are sent per second? Compute the source rate R (bps)? (Hint: Check the basic colour combination in a colour picture)

Answer 1

Example problem

Step-by-step explanation:

(a) The source rate can be calculated as the product of the picture sample size and number of pixel per sample size.

Given:

Picture sample size = 480 * 500. The number of pictures sent per second = 30.

Hence sample size = 480 * 500 * 30 = 7.2e6.

Since each pixel (sample) can take one of 32 values (voltage levels), hence it needs

l

o

g

2

32

=

l

o

g

2

2

5

=

5

∗

l

o

g

2

2

=

5

∗

1

=

5

bits/pixel (bits/sample).

The source rate R is (bps) = 7.26 * 5 = 36e6 bps.