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(a) Suppose that a digitized TV picture is to be transmitted from a source that uses a matrix of...

Question:

(a) Suppose that a digitized TV picture is to be transmitted from a source that uses a matrix of 480x500 picture elements (pixels), where each pixel can take on one of 32 intensity values. Assume that 30 pictures are sent per second. (This digital source is roughly equivalent to broadcast TV standards that have been adopted.) Find the source rate R (bps)

(b) Assume that the TV picture is to be transmitted over a channel with 4.5 MHz bandwidth and a 35 dB signal-to-noise ratio. Find the capacity of the channel (bps).

(c) Discuss how the parameters given in part (a) could be modified to allow transmission of color TV signals without increasing the required value for R.

Bandwidth:

The bandwidth of any channel is defined as the maximum number of data packets that can be exchanged between two nodes of the channel or the maximum number of data packets that can be transferred from one end to the other.

Answer and 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 =...

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Units of Measurement: Megapixels, Kilobytes & Gigahertz

from Business 109: Intro to Computing

Chapter 2 / Lesson 6
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