Question

In radio and television broadcast, the information signal is in the form of (A) analog signal (B) digital signal (C) Both analog and digit signals (D) neither analog nor digital signal

Short answer

In radio and television broadcast, the information signal is in the form of both analog and digital signals (C). Traditional broadcasts predominantly used analog signals, such as AM and FM radio and NTSC, PAL, and SECAM television systems. However, modern broadcasts have shifted towards digital signals, like DAB and HD Radio for radio broadcasts and DVB-T and ATSC 3.0 for television broadcasts, due to their numerous advantages. Both analog and digital signals are still in use today in various forms of broadcast systems.

Step-by-step solution

Understanding Analog and Digital Signals

Analog signals are continuous signals, whereas digital signals are discrete signals. In the context of radio and television broadcasts, an analog signal would mean that the information transmitted (such as voice or video) is in the form of continuous waveforms, while a digital signal would mean that the information is transmitted in the form of binary data (1s and 0s).

Analyze Traditional Radio and Television Broadcasts

Traditionally, radio and television broadcasts used analog signals for transmitting information. For example, AM (Amplitude Modulation) and FM (Frequency Modulation) radio broadcasts and NTSC, PAL, and SECAM television systems all used analog signals.

Analyze Modern Radio and Television Broadcasts

In recent years, there has been a shift towards digital signals in radio and television broadcasts. Digital broadcasts have numerous advantages over analog broadcasts, such as higher-quality audio and video, better signal reception with less interference, and more efficient use of the frequency spectrum. Examples of digital radio broadcasts include DAB (Digital Audio Broadcasting) and HD Radio, while examples of digital television broadcasts include DVB-T (Digital Video Broadcasting - Terrestrial) and ATSC 3.0 (Advanced Television Systems Committee 3.0).

Conclusion

Based on the analysis of both traditional and modern radio and television broadcasts, the correct answer is (C) Both analog and digital signals. While analog signals were predominantly used in the past, digital signals have become more popular in recent years, and both types are still in use today in various forms of radio and television broadcast systems.