Title :
Optimum Pre-Emphasis Network for Satellite Transmission of an FM TV Signal near or at Threshold
Author_Institution :
Department of Communications Communications Research Centre
fDate :
6/1/1982 12:00:00 AM
Abstract :
An optimun pre-emphasis network for the transmission of a FM television signal which is received at or near threshold is described. Objective and subjective measurements of video signal-to-noise ratio (SNR) versus received carrier-to-noise ratio (CNR) for an optimum and CCIR pre-emphasis network are given. The results show that there is an improvement of about 2 dB in SNR using the optimum pre-emphasis network over that achieved with the CCIR network. Subjective tests also show a preference for use of the optimum pre-emphasis network. These results are useful in the design of low cost earth terminals to receive higher quality television signals from a satellite transmitter.
Keywords :
Autocorrelation; Demodulation; Frequency modulation; Frequency response; Noise level; Satellite broadcasting; Signal design; Signal to noise ratio; TV; Testing;
Journal_Title :
Broadcasting, IEEE Transactions on
DOI :
10.1109/TBC.1982.266442