摘要:
A device for adjusting brightness and contrast of a cathode ray tube in a television receiver, which comprises an insertion circuit (2) for inserting first and second reference signals Pc and PY into the video signals, a variable amplifier (5) for amplifying video signals, a gain adjusting circuit which detects the first reference signal Pc from the output of variable amplifier (5) and which adjusts the gain of the variable amplifier (5) so that the intensity of the detected signal reaches a predetermined value, a circuit which supplies the output of variable amplifier (5) to a cathode ray tube (11), a brightness adjusting circuit which detects the second reference signal PY and adjusts the brightness of the cathode ray tube (11) depending upon the intensity of the thus detected second reference signal PY, adjusting circuits (21), (23) for changing the levels of the first and second reference signals Pc, PY, and a constantly multiplying circuit (24) which so multiplies the level of the second reference signal PY as to become a constant number of times as great as the level of the first reference signal Pc. The device of the invention can adjust the contrast and brightness independently of each other.
摘要:
In the method and picture signal processor for processing a first picture to be reproduced on a color picture tube , the value e ys (12) of luminance signal for a shadow S of a second picture, which has been obtained from a preceding scanning operation (11), is subtracted (13) from the value e y (10) of luminance signal for a desired pixel P out of video signals received, thereby determining the value e p of a base luminance signal. Luminance signal values e s and e h (15) are set respectively for a shadow S and a highlight H among pixels of the first picture to be reproduced on the color picture tube (14). The value e q (13) of a luminance signal for a pixel Q, which corresponds to the pixel P and is to be reproduced, is determined from the signal values e p , e s and e h in accordance with a particular correction formula. The luminance of each pixel, which is to be reproduced on the color picture tube, is adjusted (13) in accordance with the value e q of the corresponding luminance signal thus determined.
摘要:
A device for adjusting brightness and contrast of a cathode ray tube in a television receiver, which comprises an insertion circuit (2) for inserting first and second reference signals Pc and Py into the video signals, a variable amplifier (5) for amplifying video signals, a gain adjusting circuit which detects the first reference signal Pc from the output of variable amplifier (5) and which adjusts the gain of the variable amplifier (5) so that the intensity of the detected signal reaches a predetermined value, a circuit which supplies the output of variable amplifier (5) to a cathode ray tube (11), a brightness adjusting circuit which detects the second reference signal P and adjusts the brightness of the cathode ray tube (11) depending upon the intensity of the thus detected second reference signal Py, adjusting circuits (21), (23) for changing the levels of the first and second reference signals Pc, Py, and a constantly multiplying circuit (24) which so multiplies the level of the second reference signal Py as to become a constant number of times as great as the level of the first reference signal Pc. The device of the invention can adjust the contrast and brightness independently of each other.
摘要:
In a video signal processing and display system such as a television receiver employing digital video signal processing (12, 14, 20) techniques, viewer generated control signals (B, C) for normally controlling the brightness and/or contrast of a displayed image are utilized in analog rather than digital form for controlling the magnitude of the video signal.
摘要:
Verfahren zur Einstellung von Steuergrößen z.B. Lautstärke, Farbsättigung und Helligkeit in Fernsehgeräten mit einem digitalen Einstellbereich. Der Einstellbereich ist in zwei Bereiche aufgeteilt, von denen der eine für den Einstellbereich für die Fernbedienung und der andere für eine Grundeinstellung ab Offset für den anderen Bereich dient.
摘要:
A method for controlling brightness of an image according to the present disclosure comprises the steps of: determining a light source area on the basis of a light signal intensity of pixels included in the image; determining a surrounding area of the light source area in a predetermined manner; and compensating the brightness property of at least one of the light source area and the surrounding area on the basis of at least one of the property of the image, the property of a display device, or property of the surrounding environment.
摘要:
In an embodiment, a source video signal comprising reference code values and mapping function parameters for one or more mapping functions to map the reference code values to device-specific pixel values. The reference code values and the mapping function parameters are combined into first video frames in a first video signal format. The mapping function parameters represent DM metadata carried in the first video frames. Second video frames in a second video signal format are generated based on the first video frames in the first video signal format and a mapping between the first video signal format and the second video signal format. The second video frames are sent to a video sink device through the video link in an encoded video signal of the second video signal format.
摘要:
A method is disclosed that comprises mapping a high-dynamic range luminance picture to a standard-dynamic range luminance picture based on a backlight value Bac associated with the high-dynamic range luminance picture.
摘要:
Novel methods and systems for color grading are disclosed. The color grading process for a visual dynamic range image can be guided by information relating to the color grading of other images such as the standard dynamic range image.