Abstract: In an image sensing apparatus, by forming a signal processing unit which processes a signal from an image sensing unit on an expansion board of a computer or a PCMCIA card, it is possible to easily control the image sensing unit, process a signal from the computer, and by taking an image signal into an image processing unit immediately, reduces deterioration of the signal. Further, the image sensing unit is separated from the signal processing unit, and data specific to the image sensing unit is processed by the signal processing unit, thereby various types of image sensing units can be controlled.

Abstract: To provide a communication device that can operate conveniently in use in either of a first operation mode for unassisted operation and a second operation mode for operation under the control of an external data processor, disclosed is a communication device for communicating in video and audio with another communication device, comprising a mode setting unit for setting a first operation mode for unassisted operation or a second operation mode for operation under the control of an external data processor, an external connection interface for connecting with the external data processor, an operation unit, a communication unit for exchanging information with the other terminal device, a video input unit, a video output unit, an audio input/output unit, and a control unit that operates in accordance with an operation through the operation unit and outputs video data to be displayed to the video output unit in the first operation modes, and operates in accordance with control commands received from the external

Abstract: An image pickup system in which the number of cables for connecting a video camera, a headset and a personal computer are reduced. The video camera and an expansion board attached to the personal computer are connected by a single cable through 8-pin DIN connectors. Through this cable, a synchronizing signal, a control signal, and a sound signal (which is sent from an external source) are transmitted to the video camera from the expansion board. Further, a headset (having earphones and a microphone) worn by the user of the video camera is connected to the video camera through another cable. Through this cable, a sound signal from the external source is transmitted to the earphones, while a sound signal from the user input through the microphone is sent to the expansion board via the video camera and the cable for connecting the camera and the board.

Abstract: There is a receiving apparatus in which the received data is recorded by a recording head which accesses each portion of a recording medium. This receiving apparatus comprises: a discriminating circuit to discriminate whether the portion accessed by the recording head is the recorded portion or the unrecorded portion upon reception; and a control circuit for allowing the recording head to access the unrecorded portion on the basis of the result of the discrimination of the discriminating circuit. Upon reception, the control circuit controls the recording head so as to automatically access the unrecorded portion. Further, upon reception, an amount of unrecorded portions is displayed.

Abstract: In an image sensing apparatus, by forming a signal processing unit which processes a signal from an image sensing unit on an expansion board of a computer or a PCMCIA card, it is possible to easily control the image sensing unit, process a signal from the computer, and by taking an image signal into an image processing unit immediately, reduces deterioration of the signal. Further, the image sensing unit is separated from the signal processing unit, and data specific to the image sensing unit is processed by the signal processing unit, thereby various types of image sensing units can be controlled.

Abstract: There is a receiving apparatus in which the received data is recorded by a recording head which accesses each portion of a recording medium. This receiving apparatus comprises: a discriminating circuit to discriminate whether the portion accessed by the recording head is the recorded portion or the unrecorded portion upon reception; and a control circuit for allowing the recording head to access the unrecorded portion on the basis of the result of the discrimination of the discriminating circuit. Upon reception, the control circuit controls the recording head so as to automatically access the unrecorded portion. Further, upon reception, an amount of unrecorded portions is displayed.

Abstract: A video communication system includes a terminal unit for transmitting/receiving an information signal including video information, and a repeater to which a plurality of terminal units each identical to the terminal unit can be connected. The repeater generates a reference sync. signal for causing the plurality of connected terminal units to synchronously operate, and supplies the generated reference sync. signal to each of the plurality of connected terminal units. The repeater forms a transmission signal to be transmitted to a transmission line by synthesizing information signals respectively transmitted from the plurality of terminal units which are synchronously operating in accordance with the reference sync. signal, and outputs the formed transmission signal to the transmission line. This arrangement realizes an on-seat type multipoint video conference, at a low cost, which is held while a plurality of participants are sitting on seats, without making any preparations before the video conference, e.g.

Abstract: A noise reduction device employing a sample and hold circuit includes a high-pass filter to which input signals are provided. A sample and hold circuit is provided to which an output from the high-pass filter is provided. A limiter is included for limiting the amplitude of an output from the sample and hold circuit. A differential amplifier receives the input signals and the output from the limiter, and outputs noise-reduced signals.

Abstract: A video communication system includes a terminal unit for transmitting/receiving an information signal including video information, and a repeater to which a plurality of terminal units identical to the terminal unit can be connected. The repeater forms a transmission signal to be sent to a transmission line by frequency-multiplexing information signals respectively transmitted from the plurality of connected terminal units. The repeater also receives a transmission signal supplied from the transmission line and supplies a plurality of information signals frequency-multiplexed with the input transmission signal to a corresponding terminal unit. With this arrangement, an inexpensive, easy-to-use video communication system which suffers little deterioration in image quality and sound quality can be provided.

Abstract: An image information signal processing apparatus for processing a first image information signal having at least a first image signal and a second image signal which is different from the first image signal, and a second image information signal having a third image signal with a frequency band wider than that of the first image signal or the second image signal. When the first image information signal is input, the apparatus forms first image data corresponding to the first image signal and second image data corresponding to the second image signal by performing sampling of the first image information signal in accordance with a first sampling signal having a first sampling frequency. When the second image information signal is input, the apparatus forms third image data corresponding to the third image signal by performing sampling of the second image information signal in accordance with a second sampling signal whose frequency is higher than that of the first sampling signal.

Abstract: An image transmission apparatus includes circuitry for separating color image information into a plurality of color signals and transmitting the plurality of color signals. An indication device is provided for, in response to the transmission of the plurality of color signals from the transmitting circuitry, indicating which of the plurality of color signals is transmitted. The indication may include an indication of one of a R G or B signal or an indication of a monochromatic or multi-chromatic transmission.

Abstract: An image transmission apparatus indicating a color type of the color signal transmitted includes circuitry for separating color image information into a plurality of color signals and transmitting the plurality of color signals. An indication device is provided for, in response to the transmission of the plurality of color signals from the transmitting circuitry, indicating which of the plurality of color signals is transmitted. The indication may include an indication of one of a R G or B signal or an indication of a monochromatic or multi-chromatic transmission.

Abstract: A receiving apparatus displaying the amount of unrecorded storage medium includes a recording device for recording received data in the storage medium. A display is provided for displaying the amount of recordable, but unrecorded portions of the storage medium upon reception of the received data.

Abstract: An information signal recording/reproducing apparatus includes a recording apparatus and a reproducing apparatus. The recording apparatus is arranged to record on a recording medium an information signal after angle-modulating the signal in such a way as to cause a signal corresponding to a timewise portion of the angle-modulated information signal to be in a given relation to a reference signal. The reproducing apparatus is arranged to angle-demodulate the angle-modulated information signal when it is reproduced from the recording medium, and to perform time base correction on the basis of the signal part of the angle-modulated information signal. Time base variations occurring during the reproduction can be accurately carried out by the arrangement without having any special signal added to the information signal during recording.

Abstract: A color image processing apparatus which decomposes an image signal into color components. The decomposed color components are converted to sequential picture signals. Information on certain color components of the converted sequential picture signal is thinned out and transmitted. The color component signals are stored in respective memories. Certain color component signals are read out in their entirety, while only predetermined portions of other color component signals are read out.

Abstract: An image sensing apparatus comprising a photographic optical system, a splitter optical system for splitting an optical image formed by the photographic optical system into a plurality of channels to form a plurality of optical images, at least first and second image sensors for photoelectrically converting the plurality of optical images formed by the splitter optical system into electrical signals, and a drive circuit for synchronously driving the first and second image sensors, being characterized in that the first and second image sensors are arranged on optically equivalent planes in offset relation by a distance equal to 1/2 of a picture element in the vertical direction and an imaging plane of each of both image sensors has horizontally extending shielding masks arranged thereon of about 1/2 picture element wide with a pitch of one picture element in the vertical direction.

Abstract: A recording and reproducing apparatus is arranged to record one picture amount of an image signal in a plurality of recording tracks on a recording medium, to sample one picture amount of the image signal reproduced from the recording medium according to either a first sampling clock signal or a second sampling clock signal of a frequency lower than that of the first sampling clock signal, to store the sample signal, and to selectively output either the sample signal which is sampled on the basis of the first sampling clock signal and stored or the sample signal which is sampled on the basis of the second sampling clock signal and stored. This arrangement enables the operator to readily confirm the contents of the image signal recorded on the recording medium.

Abstract: A data recording system and apparatus used for recording on a recording medium an audio signal, compressed in time base with a predetermined compression ratio, together with a data signal for reproduction of the audio signal. The data signal is composed of serial data of bits. A dummy bit is provided before the head bit of the serial data with the dummy bit being in inverted relation to the head bit. A detection system and apparatus for detection of the data transmitted by the data transmission system, and a recording medium on which signals are recorded according to the data transmission system are disclosed.

Abstract: In an image signal processing apparatus, a drop-out period of an image signal is detected while the image signal is stored in a memory, the detected results are stored in another memory. Based on the information stored in the other memory, the signal drop-out period is displayed and the drop-out signal in the image signal is compensated.

Abstract: A video signal processing apparatus, for processing a video signal including line-sequential signals, is arranged to detect the kinds of information included in the line-sequential signals obtained during each horizontal scanning period; to collect, for every predetermined period, statistics of a detection output thus obtained; and to rearrange the line-sequential signals into simultaneous signals in accordance with a control signal generated on the basis of the statistics.