Abstract: An image display device having (a) a DVD or a CD, (b) a television receiver, (c) a display for displaying an image from the DVD and the television receiver, (d) a screen burn-in preventer, and (e) a deterioration protector for protecting the display device from deterioration. The screen burn-in preventer discontinues reproduction from the DVD when an image reproduced of the DVD becomes stationary, and the stationary state continues for the predetermined time period. The deterioration protector discontinues reproduction from the DVD at a second predetermined time after the television receiver is turned on while an image reproduced from the DVD is displayed by the display.
April 17, 1998
Date of Patent:
May 21, 2002
Matsushita Electric Industrial Co., Ltd.
Abstract: This invention provides a method of generating multiple frequencies for use in a digital data transmission system including a remote transmitter and receiver. The reference frequency used in the transmitter is replicated in a remote receiver. A single crystal oscillator is used to generate a reference frequency similar to that used in the transmitter. The receiver reference frequency is manipulated by dividing the frequency into required multiple frequencies for use within the receiver. A constant comparison is made between the clock signal received in the transmitted data stream with the receiver reference frequency and the divisors are adjusted accordingly to maintain the clock frequency in the receiver within a predetermined tolerance range. This allows the output signal for display from the receiver to match the quality of the input display provided to the transmitter.
Abstract: A method and apparatus are provided to allow threshold values needed for the desired number of gradations to be set through a simple process when converting image data with numerous values into a low number of gradations. The desired number of gradations is achieved without shading being noticeable even for images having shading. The cumulative frequency distribution of the pixels for each brightness is determined from image data having a brightness range with designated gradations. The average brightness and standard deviation of the portion that is primarily background is determined from this cumulative frequency distribution. The first threshold value is determined on the basis of this average brightness and standard deviation, the second through n-1st threshold values corresponding to the meaningful information are determined on the basis of this first threshold value. An n value conversion process is accomplished using these threshold values.
Abstract: A protocol for transfer of medical radiographic image series that provides for transmission of image files in a non-serial order, to provide for transmission of image files where the images most likely to be useful for diagnosis are transmitted first. Under a default protocol the midpoint image of each series of images in a patient study is transmitted prior to endpoint or other images in the series. The default protocol can either build out the image series from the midpoint image to the endpoint image, or it can transmit the midpoint image of a series, followed by the endpoint images of a series, followed by successive sub-midpoint images between the endpoints and the midpoint image. The default protocol also transfers each image with a partial pixel depth prior to transmission of the entire series with full pixel depth. The receiving diagnostic physician can override the default protocol and select desired images for immediate transfer.
Abstract: A technique for the blocking of individual programs and/or portions of programs transmitted in a source signal, e.g., a cable television signal. In particular, individual programs and/or portions of programs within a class of programs are blocked, while allowing for the viewing of certain other programs even within the same programming class. The transmitted source signal contains individual programs having a transparent program identifier and/or transparent content identifier associated with individual programs in the source signal transmission. As the source signal enters, e.g., a particular subscriber location, the source signal is monitored in accordance with a program viewing profile defined by the subscriber. That is, particular ones of the programs and/or portion thereof available in the source signal transmission supplied to the subscriber can either be unblocked, i.e., viewable, or blocked, i.e., unviewable, at the discretion of the subscriber.
May 20, 1998
Date of Patent:
August 8, 2000
Lucent Technologies Inc.
Katherine Grace August, Avi I. Hauser, John M. Manoyan, Theodore Sizer, II
Abstract: A first mixer (306) shifts a first end (208) of a desired signal frequency bandwidth (206) of a desired signal (202) to an edge (508) of a first filter frequency bandwidth (502) of a first filter (312), wherein the first filter frequency bandwidth (502) is greater than the desired signal frequency bandwidth (206). Signals within a first undesired frequency spectrum (504) are attenuated by the first filter (314). A second mixer (316) shifts a second end (210) of the desired signal frequency bandwidth (206) to an edge (608) of a second filter frequency bandwidth (602) of a second filter (320) to receive the desired signal (202).
Abstract: In a video server used for a video-on-demand system, a special video program, such as a commercial video program, is transmitted from a special video storage unit of the video server to each subscriber terminal within a nontransmission time which takes place during a searching time for a video program requested by the subscriber and/or during an execution time of a specific reproduction control command, such as a "FAST-FORWARD" command, a "FAST-REWIND" command. The transmission of the special video program is not stopped even when a reproduction control command is given from the subscriber to the special video storage unit by judging the reproduction control command to be invalid while a reproduction control command related to video programs different from the special video program is executed by judging the commands to be valid.
Abstract: An induced AC power source video amplifier includes a signal amplifying circuit, a transformer, and a plastic material shell. One end of the transformer is connected to a metal AC line input prong, and another end is connected to supply power to a signal amplifying circuit. The signal amplifying circuit and transformer are fixed to the plastic material shell so that the metal prong projects to the outside of the shell. The shell further includes input and output terminals and selective switches, including a gain select switch and an input select switch.
Abstract: An automatic gain control (AGC) circuit of a high definition television (HDTV) signal receiver and a method to compensate for a change in amplitude of a high definition signal. The AGC circuit of the high definition signal receiver includes a non-coherent AGC signal generator for generating a first AGC signal according to the magnitude of the IF signal, a coherent AGC signal generator for generating a second AGC signal according to the magnitude of the segment synchronizing signal, and a selector for selecting the second AGC signal when the segment synchronizing signal is detected and the first AGC signal when the segment synchronizing signal is not detected and providing the selected signal to a tuner/IF demodulator.
Abstract: A high frequency video isolation circuit comprising: a modulating signal source for producing a modulating signal having a frequency of several hundred megahertz; an input multiplier for multiplying the modulating signal with an input video signal having frequency components in a frequency range from about several hertz to about one hundred or more megahertz, to produce a modulated video signal having frequency components in a frequency range from about one hundred megahertz to about several hundred megahertz; a first isolation transformer having an input and an output, for transforming the modulated video signal from the input to the output; and an output multiplier for multiplying the transformed modulated video signal with the modulating signal to produce an isolated output video signal having the frequency components of the input video signal.
Abstract: Controlling the screen size of a wide display monitor, by which the screen size can be regulated by the user's pressing a key such that the screen is maintained stable according to the switching of wide view mode and/or expanded view mode, wherein a display mode and a DAC level dependent upon the display mode are selected. It is then checked to make sure that the DAC level is entered, when the display mode and the DAC level are entered. Then the DAC levels of horizontal and vertical sizes are calculated, and the screen size is controlled according to the calculated DAC levels of the horizontal and vertical sizes.
Abstract: A method and apparatus are provided to allow threshold values needed for the desired number of gradations to be set through a simple process when converting image data with numerous values into a low number of gradations. The desired number of gradations is achieved without shading being noticeable even for images having shading. The cumulative frequency distribution of the pixels for each brightness is determined from image data having a brightness range with designated gradations. The average brightness and standard deviation of the portion that is primarily background is determined from this cumulative frequency distribution. The first threshold value is determined on the basis of this average brightness and standard deviation, the second through n- 1st threshold values corresponding to the meaningful information are determined on the basis of this first threshold value. An n value conversion process is accomplished using these threshold values.
Abstract: The present invention relates to a beam current control system for detecting and controlling a beam current generated by a cathode ray tube. The system comprises a video processing circuit that receives a first signal, and which generates a second signal that includes a video signal and a synchronization signal, which is provided to the cathode ray tube. The cathode ray tube generates a beam current corresponding to the second signal, where the beam current has a video signal portion and a synchronization signal portion. A storage element coupled between the video processing circuit and the cathode ray tube clamps the second signal at a first predetermined level, and stores an electrical charge corresponding to the video signal portion of the beam current during a first time interval.
September 15, 1997
Date of Patent:
April 6, 1999
Sony Electronics, Inc., Sony Corporation
Abstract: An image display is disclosed, in which a reference signal is superimposed on image signal in a fly-back period for controlling the bias voltage on the cathode of the CRT or the reference signal or the bias voltage on the grid G2 of the CRT such as to make the beam current in the CRT cathode to be constant by detecting the beam current in the reference signal period, while also obtaining brightness control. The image display comprises a stub pulse generator 2 for providing a stub on the black level side more than the image signal pedestal level, and an adder 3 for superimposing the stub pulse on the image signal. It is possible to change the reference signal voltage level to be on the black level side more than the image signal pedestal level, extend the brightness range, and obtain back luster float-up.
Abstract: A sterile disposable white balance box including a housing of a pure white color having a bore formed therein. Also included is a penetrable seal formed about the bore of the housing whereby the seal is adapted to be penetrated by a scope rod whereupon a seal is afforded about a periphery of the scope rod.