The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 07, 1987
Filed:
Nov. 27, 1984
Michael Hausdorfer, Muhtal, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
The luminance signal is connected to a transmission channel which includes a subtraction circuit (3) and a branch circuit, to apply a subtraction signal to the subtraction circuit. The branch circuit includes a band-pass filter connected to receive the luminance signal and a controlled amplifier (5) serially connected with a band-pass filter. The branch circuit is additionally connected to a circuit to derive the control signal for the controlled amplifier, the control signal being obtained from a control signal generating circuit which generates the control signal as a function of the portion of the luminance signal which is within the band-pass width of the chrominance subcarrier. The signal can be obtained, for example, by forming a level signal representative of the luminance components based on the color difference signals; and/or by synchronous demodulation of the luminance signal with respect to the chrominance subcarrier; and/or by a comb filter.