Hitachi, Ltd.

Hitachi Video Engineering Co., Ltd.

Eiji Moro

Yukihiko Ozaki

Kuniaki Miura

Hiroyuki Hori

Ken Sodeyama

Shinichi Kojima

Kazuo Shigematsu

Kazuma Yokoi

Isao Takahashi

Isao Fukushima

Hitoshi Akamine

Yasutaka Konno

Yuichiro Ueno

Katsuyuki Watanabe

Masaya Itoh

Fumito Watanabe

Takeo Ohkouchi

Hiromasa Fujii

Susumu Ohtsuka

Makoto Shiomi

Hiroyuki Torii

Shigehisa Rokuta

Akifumi Tabata

Shigeaki Kanenari

A flat pixel () is a single unit composing a radiation detector and is configured so as to be divided into at least four subpixels () such that even if a prescribed number of subpixels () are removed from each pixel () in order of largest effective area, the centroid () of the effective area of the entirety of the remaining subpixels () is positioned within a similar-shape region () having the same centroid () as the pixel () and having sides of lengths that are half those of the pixel ().

Radiation detector, radiation imaging device, computer tomography device, and radiation detection method

A video surveillance equipment for detecting a change of an object in a monitoring area based on input images captured by an image capturing device, the equipment comprising:

Video surveillance equipment and video surveillance system

When a remaining battery power amount of a child appliance is lowered, a battery recharging operation of the child appliance is not quickly carried out, lowering of the remaining battery power amount of the child appliance is displayed on a mother appliance which is owned by a mother. When there is a risk that the remaining battery power amount of the child appliance is lowered and thus operations of the child appliance will be brought into a malfunction condition, a content of a special instruction is stored into a non-volatile memory employed in the child appliance. Otherwise, while the content of the special instruction has been stored in a management server, an operation may be carried out in response to the instructed response after the remaining battery power amount has been recovered to a sufficiently high battery power amount.

Information transmission system and information transmission apparatus

The present invention relates to a video signal processing apparatus for outputting an inputted video signal after subjecting the video signal to time axis correction, particularly to a video signal processing apparatus preferable in the case of subjecting the video signal to image compression. In the case in which a nonstandard signal is inputted to an image compression circuit of an MPEG2 encoder or the like, a drawback of freezing image or generating block noise or the like is resolved. A time axis correcting circuit stores an input signal to a memory and reads the input signal at a timing delayed from V synchronization of the input signal by a predetermined time period. For that purpose, a read synchronizing signal generator is reset at respective input field. A reset position is set to a position preceding the read V synchronization position by 3H through 10H. It is detected whether the input signal is a non-interlace signal or a field length thereof is deviated from a standard value and in these cases, odd/even order or synchronization timing of a synchronizing signal is corrected. Further, when the input signal is a nonstandard signal, the input signal is outputted without passing through the image compression circuit by a changeover switch.

Video signal processing apparatus

For horizontal sync information HD suitable for use in image processing module, e.g., module for TBC features, image compression recording/playback features, and LCD displaying features, it would be desirable that the time base fluctuations of the video input signal is faithfully reflected and that an interpolated HD generating feature is provided. A module for generating pulses generates the trailing edges of Csync as the trailing edge HD, and switches to an interpolated HD when a dropped pulse is detected after a few microseconds delay in the leading edge relative to the standard pulse. Thus, the trailing edge HD is selected within a time base fluctuation on the order of a few microseconds and the time base fluctuation is faithfully reflected and interpolation features can also be provided.

Video signal processing device

A video signal processor includes an image quality adjusting device or noise canceling device which responds to at least one noise information item containing a video signal and, preferably, the noise information item and a brightness information item contained in the video signal, to control quality of a displayed video image to provide a high quality video image.

Video signal processing apparatus with image quality adjustment

A video signal processing apparatus with an automatic picture quality control function comprises a reproduction unit for reproducing a video signal from a video signal recording medium, an APL detector and a noise detector for detecting as a DC potential signal two different pieces of information affecting the picture quality contained in the video signal reproduced by the reproduction unit, a DC potential shift circuit for shifting the smaller of the two DC potential signals detected by the detectors in accordance with the reproduction mode of the reproduction apparatus, an input terminal for inputting a variable DC potential, a switching unit for selecting the output of the DC potential shift circuit or the input from the input terminal, and a picture quality control circuit for controlling the picture quality of the video signal reproduced at the reproduction apparatus by the DC potential from the switching unit.

Video signal processing apparatus with automatic picture quality control

A demagnetizing circuit of a home use video tape recorder is controlled by using means such as a control by a microcomputer or the like so as to execute a demagnetizing operation in a desired tape position interval. Further, by properly controlling an onscreen-display on a monitor display screen or a display on a VTR display tube, the operating efficiency is further improved.

Video tape recorder having a special demagnetizing function

A magnetic recording and reproducing apparatus having a first recording mode and a second recording mode in which a luminance signal of a video signal is converted into FM luminance signal related to a first carrier frequency and to a second carrier frequency so as to be recorded on a magnetic tape includes a discriminating device or discriminating a recording mode in which an FM luminance signal reproduced from a magnetic tape so as to be supplied to a playback circuit has been recorded. The signal discriminating device includes an automatic gain control (AGC) circuit for absorbing a dispersion of the reproduced signal, a discrimiating circuit having a first band-pass filter and a second band-pass filter for processing an output from the AGC circuit so as to discriminate the first and second modes, a detecting circuut to which the reproduced signal is supplied in a parallel fashion with respect to the AGC circuit such that an amplitude of the signal is detected and is then compared with a predetermined value so as to obtain noise information, and a latch circuit for latching an output from the discriminating circuit such that in response to the noise information from the detecting circuit, a previous value of the outpt from the discriminating circuit is held, thus producing a discrimination output of the discriminating device.

Signal discriminating device for VTR having expanded dynamic range

The IC chip consists of electronic circuits wherein voltage control oscillator whose oscillation frequency is dependent on the product of the resistance value of a resistor element and the electrostatic capacity of a capacitor element is provided; said capacitor element consists of the first variable capacitor; said voltage control oscillator comprises said capacitor consisting of said first variable capacitor; said first variable capacitor is controlled by the output obtained by detecting the output signal of said voltage control oscillator by its phase, using the predetermined reference signal, whereby the oscillation frequency of said voltage control oscillator can be made to agree with the frequency of said reference signal. Furthermore, the characteristic of said electronic circuit is dependent on a second resistor element and a second variable capacitor element; said second variable capacitor is controlled by the output obtained by the phase detection so that dispersions of the resistance value of the resistor element and the electrostatic capacity of the capacitor element in said electronic circuit are absorbed automatically.

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Tokyo, Japan

Eiji Moro