Abstract: There are provided an image display apparatus and method, which are capable of improving the operability of a white board function thereof, and allowing different devices to be operated on the same screen in a unified manner, and an information processing apparatus having the image display apparatus, and a storage medium storing a program for implementing the method. A control signal input device inputs a control signal. An operation signal output device outputs an operation signal to an external signal source. A memory section stores display screen information. A control signal switching section selectively switches use of the control signal from the control signal input device between a control signal for the display screen information stored in the memory device and the operation signal to be outputted from said operation signal output device.

Abstract: The present invention provides a projection apparatus utilizing plural light sources, in which the light source principally irradiating the light valve is switched by moving the relative position between the plural light sources and the mirror for guiding the lights outputted from such light source to the light valve. Also the configuration can be simplified by using commonly the light condensing device for the plural light sources.

Abstract: A display system for displaying an image to be displayed by an image processing device, divisionally on a plurality of display devices. The display system includes the image processing device, a first display device for displaying an image on a first display unit, a second display device for displaying an image on a second display unit, a first coordinate value input device provided in correspondence with the first display unit, and a second coordinate value input device provided in correspondence with the second display unit, wherein the first display device has an input unit for receiving data from the first coordinate value input device and data from the second coordinate value input device.

Abstract: There are provided an image display apparatus and method, which are capable of improving the operability of a white board function thereof, and allowing different devices to be operated on the same screen in a unified manner, and an information processing apparatus having the image display apparatus, and a storage medium storing a program for implementing the method. A control signal input device inputs a control signal. An operation signal output device outputs an operation signal to an external signal source. A memory section stores display screen information. A control signal switching section selectively switches use of the control signal from the control signal input device between a control signal for the display screen information stored in the memory device and the operation signal to be outputted from said operation signal output device.

Abstract: The present invention provides a projection apparatus utilizing plural light sources, in which the light source principally irradiating the light valve is switched by moving the relative position between the plural light sources and the mirror for guiding the lights outputted from such light source to the light valve. Also the configuration can be simplified by using commonly the light condensing device for the plural light sources.

Abstract: A video signal reproducing apparatus having a video camera part which produces a video signal by picking up an image of an object and is arranged in one unified body at least with a reproducing part which reproduces a video signal from a recording medium is arranged to selectively supply the video signal obtained by picking up the object's image or the reproduced video signal obtained from the recording medium to one and the same signal processing means. The disclosed arrangement not only permits simplification of the apparatus but also enables the apparatus to reproduce a high quality video signal.

Abstract: A video signal reproducing apparatus is arranged to use a first video signal which corresponds to an image sensed state of an object and is obtained by sensing the object's image and a second video signal which is reproduced from a record bearing medium; and to form and produce at least one picture plane portion of a third video signal which includes and has the first and second video signals mixed therein in a time sharing manner.

Abstract: A video signal reproducing apparatus is arranged to use a first video signal which corresponds to an image sensed state of an object and is obtained by sensing the object's image and a second video signal which is reproduced from a record bearing medium; and to form and produce at least one picture plane portion of a third video signal which includes and has the first and second video signals mixed therein in a time sharing manner.

Abstract: A video signal reproducing apparatus having a video camera part which produces a video signal by picking up an image of an object and is arranged in one unified body at least with a reproducing part which reproduces a video signal from a recording medium is arranged to selectively supply the video signal obtained by picking up the object's image or the reproduced video signal obtained from the recording medium to one and the same signal processing means. The disclosed arrangement not only permits simplification of the apparatus but also enables the apparatus to reproduce a high quality video signal.

Abstract: The video signal processing apparatus of the invention is an apparatus for processing a video signal superimposed on a carrier signal by digitizing. The video signal is sampled at a sampling frequency equal to 2n (where n is 2 or higher integer) times the frequency of the carrier signal to form 2n sample data per period of the carrier signal. After the formed sample data have been memorized in the sampling sequence, the corresponding 2n sample data to one period of the carrier signal are read in a different sequence from that when the aforesaid memorizing was carried out. Thus, the video signal can be processed by using means of simple structure.

Abstract: A color video signal reproducing apparatus for reproducing a color video signal from a recording medium on which at least luminance and chrominance signals are recorded in the form of a multiplexed signal is arranged to reproduce the multiplexed signal from the recording medium; to separate the luminance and chrominance signals from the reproduced multiplexed signal; and to demodulate and convert the chrominace signal into a plurality of different base-band signals. This arrangement permits a correcting operation to be accomplished on the color information of the reproduced color video signal without deteriorating the color information with simple structural arrangement.

Abstract: A color video signal reproducing apparatus for reproducing a color video signal from a recording medium on which at least luminance and chrominance signals are recorded in the form of a multiplexed signal is arranged to reproduce the multiplexed signal from the recording medium; to separate the luminance and chrominance signals from the reproduced multiplexed signal; and to demodulate and convert the chrominance signal into a plurality of different base-band signals. This arrangement permits a correcting operation to be accomplished on the color information of the reproduced color video signal wihtout deteriorating the color information with simple structural arrangement.

Abstract: The present invention is directed to a reproducing apparatus for reproducing a composite signal from a record bearing medium on which said composite signal is recorded, said composite signal being formed by frequency multiplexing a frequency-modulated luminance signal and a low-band converted carrier chrominance signal which is obtained by frequency-converting a carrier chrominance signal from a high frequency band to a low frequency band. The recording apparatus is constructed to separate the frequency-modulated luminance signal and the low-band converted carrier chrominance signal from the composite signal reproduced from said record bearing medium, to demodulate the frequency-modulated luminance signal to restore the luminance signal, to convert the low-band converted carrier chrominance signal into two kinds of color difference signals and to form R, G and B signals from the luminance signal and the two kinds of color-difference signals thus obtained.

Abstract: A video signal reproducing apparatus having a video camera part which produces a video signal by picking up an image of an object and is arranged in one unified body at least with a reproducing part which reproduces a video signal from a reducing medium is arranged to selectively supply the video signal obtained by picking up the object's image or the reproduced video signal obtained from the recording medium to one and the same signal processing means. The disclosed arrangement not only permits simplification of the apparatus but also enables the apparatus to reproduce a high quality video signal.

Abstract: An apparatus for recording and/or reproducing video signals is disclosed. First and second video signals from an imaging unit and an external video input, respectively, are coupled to the apparatus. A converter circuit selectively acts to form a time expanded or time compressed version of the input video signal depending upon whether the input is the first or second input signal. In the former case, the first input video is recorded on a recording medium and the time expanded version coupled to a display, while in the latter case, the second input video signal is coupled to the display and the compressed version recorded. During the reproduction, the converter circuit also generates a time expanded version of the reproduced signal for coupling to the display.

Abstract: A frequency modulated signal reproducing device includes a reproducing device for reproducing a frequency modulated signal from a recording medium; a pilot signal generating circuit for generating a pilot signal relative to a discontinued part of the signal reproduced by the reproducing device; a phase lock circuit which generates a phase locked signal which is phase locked relative to the reproduced signal; a demodulating circuit for frequency demodulating the phase locked signal; and a control circuit for controlling the response speed of the phase lock circuit on the basis of the pilot signal.

Abstract: A frequency modulated signal reproducing device comprises a reproducing device for reproducing a frequency modulated signal from a recording medium; a pilot signal generating device for generating a pilot signal relative to a discontinued part of the signal reproduced by the reproducing means; a phase lock device which generates a phase locked signal which is phase locked relative to the reproduced signal; a demodulating device for frequency demodulating the phase locked signal; and control means for controlling the response speed of the phase lock means on the basis of the pilot signal.

Abstract: An automatic gain control circuit includes a VCA, an AGC detector and an AGC time constant circuit which form an AGC loop. The AGC circuit further includes a level detector and a time constant designator. When the level detector detects an excess level of a signal derived from the VCA, the designator changes the time constant of the time constant circuit.