Abstract: A display method and apparatus are provided for enabling a user, whether or not he has experience, to readily detect a luminance level of a video image with high accuracy. A luminance level of a video signal of a video image is converted to color information to display a change in the luminance of the video image as a change in color. The conversion preferably involves a method of converting the luminance level to color information of three primary colors, red, green, blue, in accordance with a plurality of weights, respectively, a method of converting a luminance level in a predetermined range to color information having a changing rate larger than a changing rate of the luminance level, a method of converting a luminance level out of the predetermined range to color information of a maximum or a minimum level, or the like. Also, the input video signal is preferably displayed together with a converted video image side by side or one on another.

Abstract: A display method and apparatus are provided for enabling a user, whether or not he has experience, to readily detect a luminance level of a video image with high accuracy. A luminance level of a video signal of a video image is converted to color information to display a change in the luminance of the video image as a change in color. The conversion preferably involves a method of converting the luminance level to color information of three primary colors, red, green, blue, in accordance with a plurality of weights, respectively, a method of converting a luminance level in a predetermined range to color information having a changing rate larger than a changing rate of the luminance level, a method of converting a luminance level out of the predetermined range to color information of a maximum or a minimum level, or the like. Also, the input video signal is preferably displayed together with a converted video image side by side or one on another.

Abstract: Disclosed is a method which comprises the steps of providing a video-signal output device (4), accepting a brightness component of a video signal corresponding to a first position of a subject (1) which is imaged by the video-signal output device (4), correcting a gamma (?) value of the brightness component corresponding to the first position, accepting a brightness component of the image signal corresponding to a second position of the subject (1) which is imaged by the video-signal output device (4), correcting the gamma (?) value of the brightness component corresponding to the second position, calculating a ratio between the gamma-corrected brightness component corresponding to the first position and the gamma-corrected brightness component corresponding to the second position, and displaying the ratio.

Abstract: An apparatus for monitoring a video signal comprises means (11) for receiving a video signal (X(video), Y(video), Z(video)) having X-, Y- and Z-components, means (13) for calculating a position (x(video), y(video)) having an x-axis component and a y-axis component on a xy chromaticity diagram from the video signal in accordance with a predetermined conversion formula, and means (14) for displaying the position (59). The means (14) can display a triangle (57, 58) which connects three xy-values corresponding to R-, G- and B-components, respectively, which belong to a predetermined color reference system, a range (56) on the xy chromaticity diagram which can be viewed by humans, and/or a marker (60) for a range of an xvYCC display system. The means (14) can indicates whether or not the video signal represents a color (x(video), y(video)) which is located out of a predetermined range (51-54). The xy chromaticity diagram can be transformed, for example, to a UCS chromaticity diagram.

Abstract: A measuring instrument is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data. A video signal level in the graphic data is measured and video signal level data is generated. Display data including the graphic data and the video signal level data is generated. A display device receives display data from the measuring instrument. The display data is visualized and an image and a video signal level are displayed.

Abstract: The present invention reduces a burden on an observer. A video signal level display device includes setting sections (24, 25, 26) for setting maximum effective values corresponding to R, G, and B components, respectively, of an RGB component signal, calculating sections (21, 22, 23) for calculating respective coordinates of the R, G, and B components so that the maximum effective values concentrate at one point, generating section (27) for generating straight scale data corresponding to the R, G, and B components, respectively, so that the maximum effective values concentrate at one point, and display section (29) for displaying the respective coordinates of the R, G, and B components and the respective straight scale date (61, 62, 63, 71, 72, 73, 74, 75, 75) on the R, G, and B components.

Abstract: A measuring instrument 50 comprises: a) means which is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data; b) means for measuring a video signal level in the graphic data, and generating video signal level data; and c) means for generating display data including the graphic data and the video signal level data. A display device 10 comprises: a) means for receiving the display data from the measuring instrument 50; and b) means for visualizing the display data and displaying an image and a video signal level.

Abstract: A video signal level monitoring apparatus which monitors the level of a video signal, said apparatus comprises means for inputting a first color difference component (Cb) and a second color difference component (Cr) of a component video signal, means for inputting a luminance component (Y) of the component video signal as a luminance component (Y) of a composite video signal, means for generating a color component (C) of the composite video signal from the first color difference component and the second color difference component, and means for displaying each of the amplitude values of the color component (C) and the luminance component (Y) in a one-dimensional direction. Preferably, the display means displays each amplitude value in a bar graph display and scale marks corresponding to a minimum acceptable value and a maximum acceptable value within a range in accordance with a predetermined standard.

Abstract: A measuring instrument is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data. A video signal level in the graphic data is measured and video signal level data is generated. Display data including the graphic data and the video signal level data is generated. A display device receives display data from the measuring instrument. The display data is visualized and an image and a video signal level are displayed.

Abstract: A waveform monitor comprises: means (35) for generating image data including at least waveform display data of a video signal; means (36) for displaying the image data; means (71) for generating moving image data compressed in a predetermined format from the image data; a converter (38) for packetizing the moving image data; and interface means (39) for outputting the packetized moving image data to a network. The waveform monitor can further comprise means (51) for converting a compressed video signal to uncompressed parallel data, the waveform display data is converted from the parallel data.

Abstract: A waveform monitor comprises: means (51) for converting a compressed video signal into uncompressed parallel data; means (33) for converting the parallel data into waveform display data; means (52) for analyzing a transmission status of the compressed video signal and generating analysis data; and means (36) for displaying the waveform display data and the analysis data simultaneously. The waveform monitor can further comprise: means (31) for converting an SDI signal into parallel data; and means (32) for analyzing a transmission status of the SDI signal and generating the analysis data.

Abstract: The present invention reduces a burden on an observer. A video signal level display device includes means (24, 25, 26) for setting maximum effective values corresponding to R, G, and B components, respectively, of an RGB component signal, means (21, 22, 23) for calculating respective coordinates of the R, G, and B components so that the maximum effective values concentrate at one point, means (27) for generating straight scale data corresponding to the R, G, and B components, respectively, so that the maximum effective values concentrate at one point, and means (29) for displaying the respective coordinates of the R, G, and B components and the respective straight scale date (61, 62, 63, 71, 72, 73, 74, 75, 75) on the R, G, and B components.

Abstract: A video signal level monitoring apparatus which monitors the level of a video signal, said apparatus comprises means for inputting a first color difference component (Cb) and a second color difference component (Cr) of a component video signal, means for inputting a luminance component (Y) of the component video signal as a luminance component (Y) of a composite video signal, means for generating a color component (C) of the composite video signal from the first color difference component and the second color difference component, and means for displaying each of the amplitude values of the color component (C) and the luminance component (Y) in a one-dimensional direction. Preferably, the display means displays each amplitude value in a bar graph display and scale marks corresponding to a minimum acceptable value and a maximum acceptable value within a range in accordance with a predetermined standard.

Abstract: A change-over apparatus is suitable for improving the reliability of a duplex system. The change-over apparatus is associated with a duplex system which includes a pair of devices, i.e., a main device and a backup device. The change-over apparatus comprises a switch and a switching controller. The switching controller comprises a first monitor and a second monitor, each of which has a digital monitoring circuit for monitoring a signal associated with the duplex system from a digital signal aspect. Each of the monitors can also comprise an analog monitoring circuit for monitoring the signal from an analog signal aspect. A switching command circuit switches between the pair of devices based on signals from the first and second monitors.

Abstract: A measuring instrument 50 comprises: a) means which is fed with a video output signal, and performs RGB processing on the video output signal to generate graphic data; b) means for measuring a video signal level in the graphic data, and generating video signal level data; and c) means for generating display data including the graphic data and the video signal level data. A display device 10 comprises: a) means for receiving the display data from the measuring instrument 50; and b) means for visualizing the display data and displaying an image and a video signal level.

Abstract: An evaluator for evaluating a digital transmission system is provided which comprises a signal power decrease detector and a system margin evaluator. The signal power decrease detector receives a digital signal which has been transmitted through the transmission medium of a transmission system so as to generate a signal power decrease signal. The system margin evaluator evaluates the system margin of the transmission system in response to the signal power decrease signal. The system margin of the digital transmission system can be evaluated in a simple and convenient manner.