Adjusting device and method for analogy YPbPr signal gain value
A signal gain and adjustment device technology, applied to color signal processing circuits, high-definition color TVs, etc., can solve problems such as adverse effects on image quality, achieve simple and rapid calculation processes, speed up image processing time, and reduce system load Effect
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[0025] In the standard YPbPr signal, the Y signal representing the brightness (white level) is as shown in FIG. 1A , including a horizontal synchronization signal 101 and a data signal 102 . In a standard Y signal, the standard peak-to-peak voltage of the horizontal sync signal 101 is 0.6V, while the maximum peak-to-peak voltage of the data signal 102 is 0.7V, as shown in FIG. 1A . In practical applications, the Y signal is inevitably attenuated or amplified by the influence of the environment. As shown in FIG. 1B, the actual peak-to-peak voltage value of the horizontal synchronization signal 111 is X, while the maximum peak-to-peak voltage value of the data signal 112 is Z . The proportional relationship between X and Z is unchanged, that is to say, X / Z=0.6 / 0.7, and Z=X*0.7 / 0.6 can be obtained after arrangement. Therefore, the present invention proposes a device and method that can adjust the voltage value of the data signal according to the horizontal synchronous signal. ...
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