Abstract: A film mode detection method and corresponding relatively non complex hardware implementation compares the amplitudes of pixels of corresponding image areas of three successive field to determine if the pixel amplitudes are monotonically increasing or decreasing. Depending on the comparison a positive or negative polarity indication is generated and these indications are combined within each field to generate a polarity indication representing each respective field. The field sequence of such field polarity indications are thereafter compared with a predetermined pattern to determine whether the video signal is from a film or video-mode source.

Abstract: In a liquid crystal display device for receiving television signals by an interlace scanning method, number of the rows of pixels and of scan signal lines on a liquid crystal panel is increased to be the same as the number of valid scan lines of 1 frame of television signals. The original video signals to be inputted to the device are compressed to 1/2, and interpolating signals are added to every line of the compressed signals to form pseudo video signals. Shift register operation of a scan driver and the segment driver are done twice as fast as that in the conventional device, and start timing of the shift register operation of the segment driver is controlled to be shifted by 1/2 horizontal scanning period between the even field and odd field, while the pseudo video signals are applied to the segment driver.

Abstract: A circuit for controlling a reproduced volume level of an audio signal to a desired level includes a peak detector for detecting a peak amplitude level in the audio signal, a user operable control for generating a signal indicative of a desired amplitude level, a comparator for comparing the detected peak amplitude level in the audio signal with the desired amplitude level and for generating a comparison signal as a result of the comparison, and a voltage controlled amplifier coupled to the comparator for adjusting the peak amplitude level in the audio signal in dependence on the comparison signal. The output from the voltage controlled amplifier then has the desired level.

Abstract: If previously stored transmitters allocated to certain program settings in an entertainment electronics appliance are reallocated to the usual program settings, e.g., because of a changed transmitter distribution arrangement due to a change of location, time consuming reprogramming becomes necessary. The present invention concerns obtaining a simple sequencing process for reallocating previously stored channels to the desired program setting number. A microprocessor receives a command, and within a time window determined by the command, reads previously programmed data concerning two selected program settings from a main memory into a first auxiliary memory, and from this auxiliary memory into a second auxiliary memory, interchanging the channel numbers, and from the second auxiliary memory into the main memory again, so as to keep the same program numbers.

Abstract: An image motion-dependent mechanism selectively inserts an image modification operator, such as a median filter, into the image signal path of a video display unit, so that loss of definition and introduction of flicker resulting from the use of a median filter in the course of the display of a still or stationary image on an IDTV are effectively eliminated. The selectively inserted image modification operator, which responds to an index code or bit value representative of whether or not the image frame is repeated, may also serve to prevent the generation of cross-luminance and cross-color decoding artifacts, as well as reducing the amount of random noise in the image.

Abstract: A video field memory device for multi-broadcasting system employs upper and lower half memory cell arrays for storing a video signal according to the largest scanning bit and the largest scanning line of the multi-broadcasting system, and the upper and lower half memory cell arrays having the scanning bits of 1023.times.4 and the scanning lines of 313.times.4 corresponding to the largest one of various television broadcasting systems. Thus, the video field memory device for multi-broadcasting system for varying the scanning bits or the scanning lines can select a broadcasting system in a single chip by using a external TYPE signal, independent of the scanning bits or the scanning lines for each television broadcasting system.

Abstract: A television signal satellite receiver that, in one embodiment, is capable of utilizing the recording and playback capabilities of a video signal recorder, such as a video cassette recorder (VCR), to back up data contained in the satellite receiver memory and/or to load the memory with data. Typical data to be backed up or loaded into the memory includes satellite position data, which is unique with respect to the location of each satellite receiver and, more specifically, to the location of the antenna associated with the receiver. To back up data, the satellite receiver employs a translator that converts data contained in the satellite receiver memory from a digital format to a video signal format that is appropriate for the video signal recorder. Conversely, to load the memory with data, the translator converts data with the video signal format that is provided by the video signal recorder into a digital signal format that can be loaded into the memory of the satellite receiver.

Abstract: Signal processing apparatus comprises a chrominance subsampler (10) for sampling the U and V components of a PAL video signal in response to an enable signal. A counter (30) responsive to the horizontal synchronization component of the PAL video signal generates the enable signal upon detection of a predetermined number of horizontal synchronization pulses. Logic (60,70,80) responsive to the vertical synchronization component of the PAL video signal resets and disables the counter (30) upon detection of a vertical synchronization pulse. Logic (50,60,70,80) restarts the counter (30) from a reset state upon detection of a predetermined polarity in the V component of the PAL video signal.

Abstract: A remote control circuit for a system wherein several terminal units are operatively connected to a single main unit, enabling the main unit to be controlled by the terminal units. The remote control circuit includes a remote control receiving unit equipped in a TV system and adapted to receive and process a remote control signal from a remote control transmitter, and a TV control microprocessor adapted to analyze the remote control receiving unit so as to output a VCR remote control signal and TV control signal based on code information of the remote control signal. The VCR control signal is transmitted to a VCR system by a VCR control signal transmitter, via a radio frequency cable. The VCR control signal includes a control signal converter and a pulse width modulator. In the VCR system, original VCR control signal is recovered, by a band-pass filter and a rectifier.

Abstract: A synchronizing/separator circuit separates a horizontal synchronizing signal and a vertical synchronizing signal contained within a television signal. A phase locked loop synthesizes a clock signal at 32 fH by phase locking the horizontal synchronizing signal with a divided version of the 32 fH clock signal. The phase locked loop includes a voltage controlled oscillator (VCO) responsive to the phase comparison to perform the phase lock. A circuit separates the run-in clock and caption data in horizontal scanning period 21 H in the vertical blanking interval. A phase comparator receives the run-in clock and phase compares it with the 32 fH clock to produce an alternating control signal which is applied directly to the voltage controlled oscillator for rapid phase locking of the voltage controlled oscillator in preparation for decoding the caption data. The voltage controlled oscillator is controlled by the charging and discharging rate of a capacitor charged by a constant current source.

Abstract: A clamp system for use in a television receiver having tuner and auxiliary video sources, comprises an IF AGC and video detector circuit having an AGC reference voltage input and an auxiliary video input signal clamp circuit having a reference voltage input. The detector circuit and the clamp circuit are each formed on a common integrated circuit along with a video switch for selecting video signals provided by said detector and clamp circuits. The integrated circuit further includes a reference voltage source and a bias generator for deriving the AGC reference voltage and the auxiliary input signal clamp voltage from the common source.

Abstract: An interlace-system moving image can be prevented from being blurred when a scene is changed. A frame header is provided at the top of data of one frame formed of two fields and a field flag is recorded in the frame header. The field flag is used to identify whether the frame is started with an odd field or with an even field.

Abstract: A first recording/reproducing unit 1, a second recording/reproducing unit 2 and a third recording/reproducing unit 3 are interconnected by a routing switch 4 to which is connected a bit rate converter 5 having first to third bit rate converting circuits 10 to 12 enabling data exchange between the recording/reproducing units 1 to 3. When the transmitting VTR and the receiving VTR are decided, the routing switch 4 transmits data from the transmitting VTR to the bit rate converter 5 where the bit rate of the data is changed to the bit rate handled by the receiving VTR before the data is supplied to the receiving VTR. Data exchange may be made between VTRs having different data bit rates.

Abstract: In a sound multiplex broadcast system employing sound multiple signals having a plurality of sound multiplex modes and a display control method therefor, there are detected kinds of sound multiplex mode of sound multiple signals received by the receiver, a sound multiplex mode is set, a demodulated sound output signal of a mode determined according to the mode detection signals and the mode setting signal is selected from demodulated sound output signals attained by demodulating the received sound multiple signals so as to be supplied to a sound output unit, and a kind of sound multiplex mode of the demodulated sound output signal thus selected is displayed on a display unit.

Abstract: Tuning apparatus for a television system, comprising a rotary encoder having a slidable and rotatable channel changing mechanism, the rotary encoder outputting a plurality of signals with a phase difference with respect to one another, corresponding to a channel change in accordance with the rotation of the channel changing mechanism, a microcomputer for calculating a channel number to be changed in accordance with the output signals from the rotary encoder and outputting channel receive data corresponding to the calculated channel number, and a tuner for receiving a television broadcasting signal of a channel corresponding to the channel receive data from the microcomputer.

Abstract: In a television receiver a downconverter responding to a selected television signal respectively supplies its first and second output signals as the input signals of first and second IF amplifiers, respectively. The downconverter includes a local oscillator for generating oscillations at a frequency controlled in response to the AFT signal. The first IF amplifier includes a first adjacent-channel sound carrier trap, in consequence whereof the first-IF-amplifier response is substantially reduced for the downconverted picture carrier, and an in-channel sound carrier trap. Responsive to the first-IF-amplifier response, a video detector generates a composite video signal in which sound beats are suppressed to relatively low level by the first adjacent-channel sound carrier trap.

Abstract: A signal processing system is disclosed in which the image resolution is improved by extending the horizontal frequency bands of separated luminance and chrominance signals and compensating the contour of an input image signal, the frequency band of the input chrominance signal is extended by the chrominance signal processing part, and by the extension of frequency band, the transition time of the high frequency components of the image signal is reduced for the high frequency image signal processing and reducing the short data processing time.

Abstract: In a matrix display apparatus for displaying video signal of two or more different standards, such as PAL and NTSC standards comprising a display panel (10), for example, a liquid crystal display panel, having a row and column array of picture elements (12), a column driver circuit (22) for sampling lines of an applied video signal (25) and supplying data signals to the panel (10), a row driver circuit (20) for scanning the rows of picture elements in turn, and a control circuit (21) controlling the timing of the operations of the row and column driver circuits (20,22), the row driver circuit (20) is controlled by signals ST,CLK so as to scan the rows of picture elements at a rate which is a function of the number of rows in the panel (10) and the field period of the applied video signal.

Abstract: Based on a series of video data for producing one or a plurality of text displaying images and a series of accompaniment MIDI data, a signal processing circuit (1) prepares a quasi video signal containing the two kinds of data as arranged in alternating fields or in alternating pluralities of fields in time series and identification data for identifying the series of video data and MIDI data. The quasi video signal is transmitted to terminal units (5) for users via a CATV or like transmission path. The terminal unit extracts from the quasi video signal fields of MIDI data and video data containing identification data specifying a piece of music selected by the user, and reproduces the accompaniment of the selected piece and displays the text thereof based on the extracted data.

Abstract: A television signal processor box that processes a standard incoming television signal to provide frequency channel selection, remote control capability, stereo sound separation and amplification on multiple output terminals suitable for direct connection to commercially available sound speakers, and a standard format television signal on a predetermined frequency channel for input to a standard television set without stereo sound capability.