Hitachi, Ltd.

Other

Katsunobu Kimura

Haruki Takata

Takeshi Sakai

Takaaki Matono

Mitsuo Nakajima

Yasutaka Tsuru

Yoshiaki Mizuhashi

Koichi Sudo

Tatsuo Nagata

Yasushi Naito

Wataru Kato

Masaaki Matsukawa

Satoshi Takahashi

Yutaka Yamada

Hiroshi Aoki

Ryo Hasegawa

Masahiro Ogino

Hidenao Kubota

Masato Sugiyama

Satoshi Iimuro

Yuzo Nishinaka

Masahiro Nako

Yuki Iwane

Chiharu Ishino

Gen Endou

Katsunori Mochizuki

A TV receiver transmits video data from its tuner unit to its monitor unit via wireless transmission by using a channel shared with radar. When the tuner unit receives a program to be viewed, a recorder/player starts recording of the received program. When wireless transmission of the received program cannot be started on time at the program start time because of detecting an unused channel for wireless transmission, or when a radar wave in the shared channel is detected after starting wireless transmission and then wireless data transmission is interrupted, the recorder/player plays back on a time-shift basis the program recorded on the recording medium, and the program data played back is transmitted to the monitor unit. The TV receiver is capable of preventing the user from missing a program that he wants to view even when wireless data transmission is interrupted.

Television receiver

It is an object of the present invention to provide an image display apparatus which enables cost reduction while being free from electromagnetic interference problems. A power supply circuit comprises, on a single circuit board, an AC inlet to which a power cord is connected from an external AC power supply, a filter circuit to which an inductance element is connected to suppress leakage of electromagnetic waves to the outside of the image display apparatus, and a switch which switches on/off an AC output supplied from the filter circuit. The circuit board of the power supply circuit is entirely covered by electromagnetic shielding means to shield electromagnetic waves. The electromagnetic shielding means is composed of, for example, a first shielding section which surrounds the lateral side of the circuit board and a second shielding section which covers the upper side of the circuit board. The second shielding section is formed of a part of the flat section of a rear cover of the image display apparatus.

Power supply circuit and image display apparatus using the same

In a television receiver including a video recording/reproducing apparatus therein, since reduction is quick in a recording space thereof if recording the high-definition television broadcast signal as it is, even including a recording medium, such as, a HDD of large capacity, for example, video, audio and caption data are extracted within a video extract portion, an audio extract portiona caption extract portionfrom a MPEG2-TS (Transport Stream) signal (TS=video+audio+caption data+BML (Broadcast Markup Language)+other data), but except for the BML data. And, those data extracted are recorded in a recording/reproducing portion

Video recording/reproducing apparatus and a television receiver including the same therein

An RGB signal from an input terminal is supplied to a triple over-sampling/sub-pixel control processing unit and a brightness signal generating circuit in which a brightness signal is generated. A brightness edge detection/judgment unit detects an edge from this brightness signal, judges the kind of the edge, fetches a coefficient select signal corresponding to the judgment result from a memory and supplies the signal to the control processing unit. A tap coefficient corresponding to this coefficient select signal is set in the control processing unit and a triple over-sampling processing is executed for each of RGB. For edge parts, R and B sub-pixels the timings of which are displaced by &#xb1;&#x2153; pixel from the input R and B sub-pixels and the pixel gravitys of which are displaced by &#xb1;&#x2153; or &#xb1;&#x215b; pixel in accordance with the kind of the edge are generated.

Image processing apparatus and image displaying device

The present invention provides a television apparatus that can reproduce and show a program when the program is stopped without a user performing troublesome operations even when the user is occupied with a sudden phone call or an unexpected visitor while he/she is watching television. A volume comparator starts recording of the program, which is currently being watched, by using a recording apparatus when a set volume value is lower than a threshold value or is set to a sound cancelling mode. Also, when a newly set volume value is higher than the threshold value or the sound cancelling is released, the volume comparator stops the display of the program that is currently being watched and starts reproducing display of the recorded program by returning to the recording start time point.

Television apparatus

A video display device that allows the color temperature of the signals in white color attributes having high luminance and low chroma saturation to be corrected with high precision is provided with a color temperature correction method so as to visually obtain a desirable white color on display. In some embodiments, the signal processing circuit can include an A/D converter to convert video signals into digitalized signals, a matrix circuit to convert the digitalized signals into luminance signals and at least two color difference signals, a hue conversion circuit to obtain hue signals from the color difference signals, a hue correction circuit to correct hue signals, a chroma saturation conversion circuit to obtain chroma saturation signals from color difference signals, a chroma saturation correction circuit to correct chroma saturation signals and a color temperature correction circuit to perform the color temperature correction on the respective hue and chroma saturation signals.

Video display device and color temperature correction method for the same

Within a broadcast receiving apparatus, mounting therein two (2) pieces of tuner units, each being receivable at least three (3) kinds of broadcasting signals, and being receivable plural numbers of broadcasting signals, simultaneously, the tuner units, each capable to receive an analog terrestrial broadcasting signal, digital BS/CS broadcasting signals, and a digital terrestrial broadcasting signal, are mounted within a housingof the broadcast receiving apparatus, wherein a main tunerand a sub-tunerare mounted on both surfaces of a substrate, directing upper and lower surfaces thereof into the same direction, and distributorsandfor distributing antenna inputs are attached between input terminalsandof those tuner units, bridging over both surfaces of the substrate, and thereby providing a technology for mounting or packaging the tuner units, with achieving small-sizing and thin-sizing thereof.

Broadcast receiving apparatus, and a tuner and a distributor for the same

A picture display technique carries out an adjustment of image quality of an inputted picture signal in response to a type of the inputted picture signal, e.g., a type of a first picture signal into which a second picture signal, having fewer scanning lines than that of the first picture signal, is converted, and an original type of the first picture signal, and then displays a picture of an adjusted picture signal on a display device. Further, the adjustment of the picture quality may include at least one of hue correction of the inputted picture signal in a certain hue range and chroma correction of the inputted picture signal in a certain chroma range. The adjustment of the picture quality may also include a contour correction of the inputted picture signal.

Picture display system for adjusting image quality of a picture signal having higher number of scanning lines

For providing a broadcast receiving apparatus and a method for staring thereof, suppressing electric power consumption therein, under waiting condition, irrespective of mounting a constituent part requiring a long time for starting up, according to the present invention, within a broadcast receiving apparatus, detection is made, always, upon an approach of a human being, by means of a human sensorand a sub-CPU, under the condition that a power plugis inserted into a commercial electric power source, so as to control supply of electric power form a main electric power source unit to each of portions of that apparatus. Thus, prior to startup of that apparatus through a main switchand a remote controller, a constituent portion (i.e., a video processing portion), being made up with a CPU and/or a digital LSI, installing OS therein and talking time for startup thereof, is started up, in advance, so as to bring it into awaiting condition; thereby shortening or reducing the waiting time after the startup of the apparatus with suppressing the electric power consumption under the waiting condition thereof.

Broadcast receiving apparatus and starting method thereof

A device enabling simultaneous recording and playback allows commercials to retain their advertisement function even if the commercials are skipped over during a playback process. By digital watermarking, CM-substitute data is embedded in program data among video signals broadcasted from a broadcast station. CM-substitute data is to present information such as a particular sponsor name and commodity name on display. The video recording/playback device includes a randomly accessible storage unit and has a simultaneous recording/playback capability. If commercial video is skipped over and is not rendered by playback, the CM-substitute information is superimposed on the rendered video of the program associated with the commercial. Thus, the commercial advertisement function can be retained.

Video recording/playback system and method for generating video data capable of providing information for substituting an advertisement thereby

A picture quality correction circuit is provided which performs contour correction by grasping features of an input video signal accurately. The correction circuit has a filter circuit for extracting contour components in an inputted video signal, a contour component nonlinear processor for changing amplitudes of the contour components extracted by the filter circuit, an adder for adding outputs of the contour component nonlinear processor and the input video signal, a histogram detection circuit for detecting a histogram of the contour components extracted by the filter circuit, and a control circuit for controlling contour emphasis quantities for the contour component nonlinear processor in accordance with the results of detection by the histogram detection circuit.

Video display apparatus having contour correction function

A video display apparatus comprises a color temperature correction circuit which controls temperature color of an input video signal; a display device which displays an image upon basis of said video signal corrected by said color temperature correction circuit; and a signal producing circuit which obtains a hue signal from said input video signal. The color temperature correction circuit controls said hue signal corresponding to the video signal of white color attributes, which has luminance equal to or greater than a predetermined value and chroma saturation equal to or less than a predetermined value, whereby achieving the color temperature correction.

A gamma correction circuit includes a node level setting unit set predetermined level values of video signals from outside, in a case where encoded M-bit (where M is an arbitrary integer) video signals being represented by using predetermined number of sections and the level values of the video signals corresponding to 2 &plus;1 number of nodes (where n is an arbitrary integer) associated with the sections on which the node are specified, and a gamma correction unit for executing gamma correction for the M-bit video signal in accordance with the level values of the nodes set in the node level setting unit, thereby the gamma correction circuit executes gamma correction on various types of display devices.

Gamma correction circuit

A noise reduction signal processing apparatus for reducing noises accurately, such as for use in a display apparatus for displaying a video signal, has a median filter (,) which receives the video signal, and which executes a filter processing on the inputted video signal and outputs a reference signal; a subtracter (,) which is connected with the median filter (,), and which outputs a difference signal that indicates a difference between a reference signal outputted from the median filter (,) and the video signal; a minimum value detection circuit (,) which outputs the difference signal from the subtracter (,) or a limitation value, whichever is smaller, as a minimum value signal; and an adder (,) which adds a noise reduction signal obtained on the basis of the minimum value signal output from the minimum value detection circuit (,) and the video signal.

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Yokohama, Japan

Katsunobu Kimura