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Which of the following modulation methods is used for the transmission of picture signals in TV transmission?

Which of the following modulation methods is used for the transmission of picture signals in TV transmission? Correct Answer VSB

VSB (vestigial sideband) transmission transmits one sideband fully and the other sideband partially thus, reducing the bandwidth requirement.

In TV Transmission the use of FM is made for Audio transmission and AM for Video transmission.

Vestigial Sideband Modulation (VSB) is used for video modulation in TV transmission due to the following reasons :

  • Video signal exhibits a large bandwidth and significant low-frequency content which suggests the use of VSB.  
  • VSB (vestigial sideband) transmission transmits one sideband fully and the other sideband partially thus, reducing the bandwidth requirement.
  • The circuitry for demodulation in the receiver should be simple and therefore cheap. VSB demodulation uses simple envelope detection.

 

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