TH11265A - Control signal generator for television systems. - Google Patents

Abstract

In a television system, multiple color signals are generated by a Luma-Chroma integrated circuit and combined to produce a signal representing the luminance information to be processed—the unprocessed portion of the signal. The pulses of the combined signal coincide with the blanking pulses present in the color signals. These are stripped to reduce errors while the properties of the combined signal are defined, for example, using an averaging detector. The detector then determines a control signal to correct the luminance signal, such as by "white light enhancement".

Claims (16)

1. In a television system, the device for generating control voltage for the signal processor consists of: a source section for generating multiple color signals containing trace elements and blanking pulses; a signal combining section for combining these color signals, creating a central signal containing trace elements and blanking pulses; a clipping section, which is connected to and acts on the combining section to move the blanking pulses away from the central signal while clipping all of the trace elements of the signal to produce the output signal; and a sensing section for determining the control signal in response to the output signal. 2. The device referred to in Claim 1, in terms of the source, consists of integrated circuits for processing the luminance and throminance components of the television signal to produce such color signals. Such integrated circuits include a controllable processor to perform the function of transforming the characteristics of multiple such color signals. 3. The device referred to in claim 2, in terms of the control signals, is connected to an enhanced processing unit for controlling the characteristics of multiple such color signals. 4. The device referred to in claim 3, in terms of its processing capabilities, includes at least one contrast control and brightness control component. 5. The devices referred to in Claim 4 in the context of the additional control section include the operation of a controllable nonlinear extender. 6. The equipment referred to in Claim 5 in the measurement section includes an average measuring instrument. 7. The equipment referred to in Claim 1 for such measurements includes an average measuring instrument. 8. The device referred to in Claim 1 for such measurement consists of a resistance network. 9. The device referred to in Claim 1 in the clipping section, consisting of the emitter section and the bias voltage source, is connected to the emitter section. 10. Television equipment for characterizing the trace portions of a video signal consists of a section for combining multiple input signals, each containing a trace portion and a blanking pulse portion, to produce a combined signal with the trace portion and the associated blanking pulse portion. A section for stripping the blanking pulse portion from the signal and extracting all trace portions of that signal produces an output signal, and a method for characterizing the trace portions of the output signal. 11. The device referred to in claim 10 in the context of multiple input signals is a multi-color signal. 12. The device referred to in claim 11 in terms of the combined signal at least matches the approximate luminance data. 13. The equipment referred to in claim 11 in this regard is for the measurement of the average level of the resulting signal. 14. The device referred to in claim 13 in terms of the control signal is connected to the operation of a controllable nonlinear amplifier to control its gain characteristics. 15. In a television system, the device consists of a component for defining at least one video signal, including video signal data within the trace range and a backblank pulse within the trace range; a component for stripping this backblank pulse from the video signal to generate an output signal containing all the video signal data within the trace range; and a component for characterizing the output signal to produce a control signal. 16. The device referred to in Claim 15 in relation to the gain characteristics is a white light gain characteristic.