H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/36
H04N 5/455 (2006.01) H04N 7/00 (2006.01) H04N 7/083 (2006.01) H04N 11/00 (2006.01) H04N 11/06 (2006.01) H04N 11/08 (2006.01)
Patent
CA 1326287
ABSTRACT OF THE DISCLOSURE In a Multiplexed Analog Component (MAC) color television transmission system in which the MAC signal is to be converted at the receiver to a composite color television signal having a 227.5 fH color subcarrier, frequency-generation equipment required at the receiver is simplified, and bandwidth is extended, by selecting the various fre- quencies in accordance with the following relationship: f0 = 3f1 = 3f2 = 2f4 = 1365k fH where: f0 is the master clock frequency, f1 is the luminance sampling frequency, f2 is the chrominance sampling frequency, f4 is the MAC sampling frequency, fH is the horizontal line frequency, and k is a positive integer greater than 2. f3 is the data clock frequency which is independent of k and remains fixed at its present value. For MAC receivers designed for C, D or D/2 standards, the relationship becomes f0 = 3f1 = 6f2 = 2f4 = 1296kfH where the symbols have the same meaning as above. f3 is the data clock frequency which is independent of k and fixed at 1296 fH for the present C, D-MAC standards and 648 fH for the present D/2-MAC standards.
594489
Scientific Atlanta Inc.
Sim & Mcburney
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