Modifying a video signal to be received only by the intended receiver is referred to as:
(A) Selective focus
(B) Scrambling
(C) Scooping
(D) Comet – tailing
Correct Ans: (B)
Explanation:
Scrambling modifies a video signal to ensure that only the intended receiver can view it. This process alters the signal, making it appear as distorted or random images to unauthorized viewers. The goal of scrambling is to block access to content for individuals who do not have permission to view it.
Cable and satellite television providers use scrambling to encode the video signal, making it unreadable unless the receiver has the correct decryption key. They commonly apply this method to prevent unauthorized access to premium channels or pay-per-view events.
For instance, service providers give subscribers a set-top box equipped with a decryption module that unscrambles the signals. Unauthorized viewers, however, will see scrambled, unreadable content.
Moreover, scrambling enhances security by preventing illegal interception of the signal. It plays a crucial role in the broadcast and cable industries, as it helps content providers manage access and protect their intellectual property.
Therefore, scrambling refers to the process where content providers modify a video signal so that only the intended receiver can view it.
