Abstract: A discrimination about a standard screen or a wide screen is performed by a discriminating circuit in accordance with the presence or absence of upper and lower black stripes of a wide screen video signal. A video signal transmitted through a low pass filter is supplied to the discriminating circuit, the presence or absence of the upper and lower black stripes of the video signal is detected and the discrimination about the standard screen or the wide screen is performed by the discriminating circuit. A noise level of the video signal is detected by an S/N ratio detecting circuit. Characteristics of the low pass filter are set in accordance with an output of the S/N ratio discriminating circuit.

Abstract: Radio receivers for receiving DTV signals, in accordance with the Advanced Television Systems Committee (ATSC) standard, or analog TV, in accordance with the National Television Sub-Committee (NTSC) standard, each use a single first detector for both types of signal. This single first detector supplies its output signals to an intermediate-frequency amplifier chain for DTV signals and to another intermediate-frequency amplifier chain for analog TV signals. The response of the intermediate-frequency amplifier chain for DTV signals is synchrodyned to baseband and supplied to symbol decoding circuitry. The response of the intermediate-frequency amplifier chain for analog TV signals is supplied to a video detector. In some of the radio receivers the sound carrier of the NTSC signal has a separate, further intermediate-frequency amplifier chain. The intermediate-frequency chain for DTV signals comprises an intitial portion which has reverse AGC, a following mixer, and a final portion which also has reverse AGC.

Abstract: A display control apparatus having a plurality of different display modes for displaying a plurality of types of image signals corresponding to different resolutions and dot clocks, includes a discrimination circuit for displaying the display mode of the currently displayed image signal, and a selection circuit for selecting on-screen display data to be displayed on the basis of the display mode discriminated by the discrimination circuit. In addition, an input circuit inputs the on-screen display data selected by the selection circuit in place of the currently displayed image data, and an output circuit outputs the on-screen display data input by the input circuit in the display mode of the image signal.

Abstract: A remote control apparatus for a digital cable television system and a method thereof which are capable of inserting and transmitting a control data into each channel of a head end (HE) which is an output unit of a transmitting unit and modulating a state checking data of a receiving unit for a VSB/QAM receiving unit based on a QPSK method, thus upwardly transmitting the date, whereby it is possible to remotely control and monitor a VSB/QAM receiving unit without additionally allocating a frequency band width.

Abstract: A letterbox image detection apparatus for detecting a letterbox image by detecting a boundary of an image area and a non-image area, so as to display the image area on a full screen according to the detection result but not to display the non-image area. The apparatus includes timing pulse generator for generating a timing pulse for splitting one screen image into N columns (N is an integer of 2 or more), image property calculator for calculating the image property of the N horizontal sections (hereinafter referred to as columns) split by the timing pulse generator, inter-line difference calculator for calculating the inter-line difference of the N image properties, edge detector for comparing the inter-line difference with a predetermined upper first threshold th1 and for detecting the edge, and edge position data holder for holding the vertical position data of the in-column edge detected by the edge determinator.

Abstract: A television line doubler (interlaced to progressive scan converter) incorporating the following aspects—an improved field motion detector which does not treat low frequency vertical transitions as motion; a frame motion detector having an improved ability to differentiate motion from subcarrier signal components; a sawtooth artifact detector; a sawtooth artifact detector in combination with a film pattern detector, such that the artifact detector can take the film pattern detector out of film mode earlier than it would if it only were responsive to a break in the film pattern; tandem field motion detectors; an improved field based film detector; film pattern detectors and motion detectors used therewith which operate by performing end-of-field calculations; the combination of a field motion detector and a frame motion detector such that the frame motion detector provides a motion signal used as a verification by the field motion detector; an improved NTSC film detector requiring a minimum number of NTS

Abstract: A system detects the presence of NTSC co-channel interference and enables NTSC comb-filtering when the NTSC signal is detected. The system comb-filters the baseband signal to generate a filtered baseband signal, and accumulates the noise power of the baseband and filtered baseband signals. The noise power of the baseband and filtered baseband signals is compared by forming a difference between the two noise powers, and the system detects the NTSC signal when the difference exceeds a threshold T. The threshold T is related to a product of a signal power of the baseband signal and a minimum carrier to noise ratio for the ATSC system.

Abstract: Methods for operating an adaptive receiver for receiving a selected DTV signal, which can be either a quadrature-amplitude-modulation (QAM) signal or a vestigial sideband (VSB) signal. The adaptive receiver includes adaptive symbol decoding circuitry for adaptively decoding baseband signal encoded in different signal formats at selected different code rates to provide a decoded output signal, an adaptive deinterleaver for deinterleaving the decoded output signal in accordance with a deinterleaving function selected from a plurality of deinterleaving functions, and an adaptive error decoder for detecting and correcting errors in the deinterleaver output signal.

Abstract: A color system determination circuit for use with an input video signal having a frequency component is disclosed. The circuit includes a color trap filter for attenuating the frequency component in the input video signal with the color trap filter providing a color burst output signal, a comparator for comparing the color burst output signal of the color trap filter and the frequency component of the input video signal, a maximum value detector which receives the color burst output signal of the color trap filter and a color burst sampling signal and detects a maximum value of the color burst output signal of the color trap filter during a period of the color burst sampling signal, and another maximum value detector which receives the video signal and the color burst sampling signal and detects a maximum value of the video signal during the period of the color burst sampling signal.

Abstract: There is provided a multi-receiving demodulator for receiving broadcasting signals from multiple broadcasting systems. The multi-receiving demodulator has a first band pass filter for selectively band-pass-filtering an intermediate frequency output from a tuner to obtain a color subcarrier corresponding to the broadcasting system of a received signal, according to a first control signal, and a second band pass filter for selectively band-pass-filtering the intermediate frequency output from the tuner to obtain an audio carrier corresponding to the broadcasting system of the received signal, according to a second control signal. A video demodulating portion receives the color subcarrier from the first band pass filter and selectively demodulates a video signal corresponding to the broadcasting system of the received signal in accordance with the second control signal.

Abstract: The PIP type video signal processing circuit for a multi-picture display circuit in which a sub-channel video signal is compressed in accordance with a discriminated mode and a reading period is synchronized with a period of the video signal of a main-picture region when the sub-picture video signal is selectively selected of the TV video signal provided from the TV and the PC video signal provided from the PC.

Abstract: A video frame detector circuit used in synchronizing one video signal with another video signal. The video frame detector of the present invention is able to automatically detect a start of frame portion of any video composite synchronization signal connected to it without requiring programming. The start of frame commences with the least frequent vertical field, or if all fields are equally frequent, a deterministic process is used to promote one of the fields to be the start of the frame. Since the video frame detector circuit of the present invention does not require programming to recognize various video signal formats, it readily adapts to different video signal conditions with little or no manual intervention. The video frame detector contains a number of memory stores for storing previously detected video patterns obtained from a composite synchronization signal. Once a current pattern is ascertained from the composite synchronization signal, it is compared against the stored patterns.

Abstract: A detector for a video signal includes a pixel comparator that compares a plurality of values of pixels of a first field of the video signal with corresponding pixels of a second field of the video signal. The second field is a second preceding field of the video signal in relation to the first field. The resultant values from the comparison is a set of pixel difference values. A counter determines a count value representative of the number of the set of pixel difference values that are either greater than a threshold value or less than the threshold value. A thresholder circuit determines a variable statistical value, such as an average, based upon a preceding series of the count values. The thresholder circuit compares the variable statistical value with the count value, or a percentage thereof, to determine whether the variable statistical value is greater than the count value or whether the statistical value is less than the count value.

Abstract: A first correlation between a present field of an input video signal and a one-field preceding field, and a second correlation between the present field and a one-field succeeding field are detected. The first correlation and the second correlation are compared with each other, and the input video signal is determined as a telecine-converted video signal when either of the first correlation or the second correlation is larger than the other correlation.

Abstract: A method of transmitting video data is characterized wherein plural pieces of video data of plural broadcast programs are divided into packets, respectively, and the plural packets of the video data and packets including information about the broadcast programs are multiplexed and transmitted, video data whose reproduction mode is non-interlace scanning and video data whose reproduction mode is interlaced scanning are transmitted as the pieces of video data of the plural broadcast programs, and the information for judging whether the video data of a broadcast program is of a non-interlace scanning type or of an interlaced scanning type being described in a packet including information about the broadcast programs is transmitted.

Abstract: Bus system (1, 2, 3) for a television signal processing device for transferring video data (d8) of at least one video data source (8) and/or supplementary data (d10) of one or more supplementary-data sources (10) between a transmitter (1) and a receiver (3) by means of a bus (2), wherein at the transmitter end (1), a single data stream (d2) for the bus (2) is formed from the video (d8) and/or supplementary data (d10) by means of an interface circuit (4). The interface circuit (4) combines the video and/or supplementary data, source by source, into blocks (db; db1, db2) following each other successively in time and containing identification data (dk; sk, ik) for start and end, or start and length, and content identification, and transfers the blocks serially.

Abstract: A radio receiver uses the same tuner for receiving a selected wideband digital signal of at least a few megahertz bandwidth, such as a digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal accompanied by an unmodulated pilot carrier signal; and a second transmission standard specifies quadrature amplitude modulation. It is determined at the receiver which of respective modulation formats specified for the various transmission standards is employed for transmitting the wideband digital signal being received. The wideband digital signal is demodulated to produce a demodulated signal, demodulation be done according to a demodulation format suitable for demodulating the modulation format determined to be employed for transmitting the wideband digital signal.

Abstract: A technique and apparatus for delivering information to the subscribers (terminals) on a communication network. The information is simultaneously displayed without interfering with the reception and/or display of subscriber's selected data or program.

Abstract: A video format mode detector for detecting the format mode of a video signal transmitted from a video data output device such as personal computer, which includes a counter for counting a horizontal synchronous signal input during one cycle of a vertical synchronous signal separated from the video signal, generating positive counting data and negative counting data, a data holder for holding the output from the counter whenever the horizontal synchronous signal separated from the video signal is applied thereto, a data adder for adding up positive holding data and negative holding data sent from the data holder whenever the horizontal synchronous signal is applied thereto, generating data which indicates the number of horizontal lines corresponding to one cycle of the vertical synchronous signal, a data comparator for comparing the positive holding data and negative holding data with each other, outputting data having the smaller value, and a mode discrimination part for searching an ROM included therein, gen

Abstract: An automatic wide screen display apparatus and method of a TV set according to the present invention determine the presence of a wide screen video signal and detect an aspect ratio data of an inputted video signal based on the determination using a vertical synchronizing signal. The apparatus and method further perform communications using a protocol defined between a main microcomputer for controlling the screen deflection and an exclusive wide screen microcomputer for detecting the aspect ratio of the inputted video signal in order to automatically display the wide screen image in accordance with the inputted video signal, and control an integrated deflection device in accordance with the communication result to control the screen deflection.

Abstract: A multi-standard receiver is which is particularly suited for reception of B/G-PAL and D/K-PAL TV signals. In the receiver, a tuner (TUN) selects a desired TV signal which is passed to a multi-standard demodulator (DEM) via an intermediate-frequency filter circuit (IFF). To obtain good performance, particularly in view of EN 55020 requirements, at moderate costs, the intermediate-frequency filter circuit (IFF) includes a main filter (FIL1) and an auxiliary filter (FIL2). The main filter (FIL1) may have a relatively narrow band, for example, just capable of passing a full B/G-PAL TV IF signal to the demodulator circuit. For D/K-PAL reception, the auxiliary filter (FIL2) is effectively switched (SW) in parallel with the main filter (FIL1). The auxiliary filter (FIL2) transfers the D/K-PAL sound carrier to the demodulator circuit (DEM), which transfer is not possible via the relatively narrow-band main filter (FIL1).

Abstract: A method and apparatus for automatically detecting the format of a high-definition television (HDTV) signal at a video encoder to allow proper encoding of the signal, including progressive and interlaced scan, and specific pixel and vertical line resolutions. The system is compatible with video standards such as the SMPTE and MPEG-2 standards. A video sample clock is determined by phase-locking clock pulses in a video signal to one of two or more available reference clocks. An SAV/EAV counter and pixel sample counter determine the horizontal resolution of the video, e.g., pixels per line. The system discriminates between 24 frames per second video and 30 frames per second video, and between a 720 line progressive scan signal and a 1080 line interlaced scan signal, for example. The system uses PLLs for each reference clock, where a lock range of the PLLs is narrow such that two PLLs will not lock at the same time for one input frequency.

Abstract: A QAM/VSB digital television (DTV) receiver of plural conversion type uses the same circuitry up to a penultimate IF amplifier for receiving DTV signals no matter whether they use QAM or VSB modulation. The converter used for generating final IF signals when QAM modulation is received and the converter used for generating final IF signals when VSB modulation is received have respective mixers and respective local oscillators with separate automatic frequency and phase control. The use of such separate converters avoids a lock-out from VSB reception mode that otherwise can occur during the reception of DTV signals with VSB modulation.

Abstract: The device comprises a signal processing section and an LED display section. The signal processing section comprises a signal processor for identifying and processing a plurality of types of display signals. The signal processing section comprises a first signal processing section for processing a television signal, and a second signal processing section for processing a non-television signal. Functions performed by the LED display section include identifying and displaying a plurality of types of display signals and controlling the color range to be displayed.

Abstract: A video adapter circuit for adapting analog video signals provided by a personal computer system designed to drive a CRT display monitor into signals appropriate for driving a flat panel display monitor. The video adapter circuit accepts analog video and synchronizing signals in any one of several scanning formats commonly utilized in personal computer systems and automatically detects the scanning format of the signals. An oscillator generates a clock signal that is synchronized with the HSYNC signal generated by the personal computer system. Each of the analog RGB video signals are amplified by a video amplifier and sampled, according to the clock signal, by a digital-to-analog converter. A controller circuit compresses the sampled video signals and stores the compressed data in a dual-port video frame memory at a rate determined by the scanning format.

Abstract: A method and apparatus in a client processing system are provided for characterizing an input television signal as broadcast television or cable television and, if the signal is cable television, as IRC cable, HRC cable, or standard cable. The client processing system includes processing circuitry configured to receive hypertext pages from a remote server and to display the hypertext pages on a display device, such as a conventional television set. The client system further includes a television tuner for receiving either cable television or broadcast television signals. When a television signal is initially provided to the client system, the client system executes a routine to automatically characterize the received television signal as broadcast, HRC cable, IRC cable, or standard cable. The characterization is made based upon one or more frequencies at which the incoming television signal is detected.

Abstract: Converting 24 frame per second film source material to 60 fields per second video involves converting one film frame into either two or three video fields using a repeating 3:2 field pattern, referred to as a 3:2 pulldown. When one film frame is made into three video fields, there will be a redundant video field. Once the source material has been transferred to video, the video is edited and distributed. When compressing video that was originally film source, the presence of the duplicate fields results in sub optimal compression. The highest efficiency compression can be achieved when the redundant fields are skipped and the frame rate is returned to that of the original film source. Thus, an inverse 3:2 pulldown, is necessary to identify and remove the redundant video fields before the video is compressed. To identify the redundant video fields, a method and apparatus is disclosed that generates motion vectors and error displacements for adjacent video fields.

Abstract: A video processing system that automatically adjusts video processor parameters depending upon the format of a received video signal in, e.g., a television receiver capable of receiving a multiplicity of video formats.

Abstract: A television receiver for processing both analog television signals and digital television signals. Specifically, the television receiver contains a RF/IF front end, an analog-to-digital converter that samples a near baseband signal using a "free running" sample rate, and a combined demodulator that demodulates the digitized analog television signals or the sampled digital television signals. The combined demodulator recovers both pilot and pix carriers as well as provide a passband adaptive equalizer that removes ghosts from analog television signals and intersymbol interference from digital television signals.

Abstract: A radio receiver for receiving a selected DTV signal that can be a quadrature-amplitude-modulation (QAM) signal or a vestigial sideband (VSB) signal synchrodynes the received signal to baseband and supplies the baseband signal to an adaptive equalizer. The presence of the pilot carrier accompanying a selected VSB DTV signal is detected for automatically switching the radio receiver for operation in a VSB signal reception mode, in which operating mode the adaptive equalizer is conditioned to respond to training signals included in the initial data segment of each data field of the VSB signal. The absence of pilot carrier accompanying a selected QAM DTV signal is detected for automatically switching the radio receiver for operation in a QAM signal reception mode, in which operating mode the adaptive equalizer is conditioned to operate without relying on the training signals included in the VSB signal.

Abstract: An apparatus and method for enabling a flat panel display terminal to simulate operations of a multifrequency cathode-ray tube monitor. The synchronization signals included in the input analog video signals are analyzed to identify a display protocol. The predetermined parameters for the identified display protocol are used to program the analog liquid crystal display panel and phase-locked loop of the flat panel display terminal.

Abstract: A picture-display-region discriminating apparatus comprising a device for setting a number of picture detection regions on a display screen of a television receiver, a detecting device for detecting a level of a video signal corresponding to each picture detection region by utilizing two reference levels, and a device for determining whether or not a picture exists in each picture detection region based on detection results from the detecting device. One of the reference levels utilized by the detecting device is a black level of a luminance signal of the video signal and the other reference level utilized therewith is a white level of the luminance signal of the video signal.

Abstract: Radio receivers for receiving DTV signals, in accordance with the Advanced Television Systems Committee (ATSC) standard, or analog TV, in accordance with the National Television Sub-Committee (NTSC) standard, each use a single first detector for both types of signal. This single first detector supplies its output signals to an intermediate-frequency amplifier chain for TV signals and to another intermediate-frequency amplifier chain for analog TV signals. The response of the IF amplifier chain for DTV signals is synchrodyned to baseband, supplied to symbol decoding circuitry, and used by first automatic gain control circuitry to develop AGC for amplifier stages in that IF amplifier chain when DTV signals are received.

Abstract: A picture signal encoding method in which a picture string produced by converting non-interlaced pictures into sets of field pictures each beginning from the first field of each interlaced picture and another picture string produced by converting non-interlaced pictures into sets of field pictures each beginning from the second field of each interlaced picture are combined together to an input picture signal for encoding, is disclosed. The method includes a detection step of detecting a lone field not constituting the non-interlaced picture in the input picture signal, and an encoding step of re-constructing the picture string of the input picture signal and encoding the resulting non-interlaced picture string.

Abstract: The DC level of the low-frequency component of a horizontal frequency is detected from a video signal by a horizontal low pass filter (LPF) 16d and a DC value detection circuit. In addition, the high-frequency component of the horizontal frequency is detected from the video signal by a horizontal band pass filter (BPF) and a nonlinear circuit. Furthermore, a high-frequency component in the vertical direction is detected from the video signal by a vertical BPF 16i and a nonlinear circuit 16i. On the basis of three detection results, the presence/absence of a non-image portion of the video signal is determined by a determination circuit.

Abstract: In order to play back a plurality of kinds of image data using a single device, a 1394 receiver receives data transmitted via an AV bus according to a format of an IEEE 1394 standard. A separating circuit then determines a format of this data by referring to a prescribed region of a CIP header of this data. When this data is MPEG-PS data, this data is outputted to an MPEG-PS decoder. When this data is MPEG-TS data, this data is outputted to an MPEG-TS decoder. When this data is DVCR SD data, this data is outputted to a DVCR-SD decoder. The MPEG-PS decoder, MPEG-TS decoder and the DVCR-SD decoder then decode the supplied data of respective formats.

Abstract: A radio receiver uses the same tuner for receiving a selected digital television (DTV) signal, irrespective of whether it is a quadrature-amplitude-modulation (QAM) or a vestigial sideband (VSB) signal. The tuner supplies a final IF signal in a 6-MHz-wide frequency band, the lowest frequency of which is not appreciably more than 2.69 MHz. The final IF signal is digitized at a rate that is a multiple of both the symbol frequencies of the QAM and VSB signals, for synchrodyning to baseband, with the 2.69 MHz difference between the carrier frequencies of QAM and VSB signals being taken into account in the digital synchrodyning circuitry. The carrier frequencies of the QAM and VSB final IF signals are regulated to be submultiples of the multiple of both the symbol frequencies of the QAM and VSB signals by applying automatic frequency and phase control signals developed in the digital circuitry to a local oscillator of the tuner.

Abstract: A television receiver has a main body and a remote-control transmitter. A display having an aspect ratio of 16:9 visualizes an incoming video signal. A picture analysis circuit is operative for analyzing the incoming video signal, An aspect converting circuit is operative for changing an aspect condition of indication of the incoming video signal on the display. A button is provided on one of the main body and the remote-control transmitter for commanding automatic aspect conversion when being operated. A decision is made as to whether or not the button is operated to command automatic aspect conversion. When the button is decided to be operated, the picture analysis circuit is activated to analyze the incoming video signal and the aspect converting circuit is controlled to automatically control the aspect condition of indication of the incoming video signal on the display in response to a result of the analysis by the picture analysis circuit.

Abstract: The present invention is directed to a method for relating indexing information associated with at least two indexing schemes to facilitate the play-back of user-specified digital video data. The method includes the steps of scanning a stream of digital video data for indexing information related to at least two indexing schemes prior to being stored in a video server, and generating a mapping table in order to convert indexing information associated with one of the at least two indexing schemes to corresponding indexing information associated with another one of the at least two indexing schemes. The indexing information identifies discrete portions of said stream of digital video data so that those portions can be accessed at a later time. The mapping table may be stored in a database.

Abstract: An apparatus for automatically switching broadcasting systems and controlling method thereof controls switching between an NTSC system and a PAL-M system according to the detected number of color killer signals. A stabilized broadcasting system is set to either the NTSC system or the PAL-M system when the broadcasting system is switched between the PAL-M system and the NTSC system by more than the predetermined times in the broadcasting signal receiving system capable of receiving both NTSC broadcasting system and PAL-M broadcasting system to provide a high picture quality images.

Abstract: A video adapter circuit for adapting analog video signals provided by a personal computer system designed to drive a CRT display monitor into signals appropriate for driving a flat panel display monitor. The video adapter circuit accepts analog video and synchronizing signals in any one of several scanning formats commonly utilized in personal computer systems and automatically detects the scanning format of the signals. An oscillator generates a clock signal that is synchronized with the HSYNC signal generated by the personal computer system. Each of the analog RGB video signals are amplified by a video amplifier and sampled, according to the clock signal, by an analog-to-digital converter. A controller circuit compresses the sampled video signals and stores the compressed data in a dual-port video frame memory at a rate determined by the scanning format.

Abstract: An aspect ratio discrimination apparatus and an image display apparatus which prevent a malfunction in discrimination of a first video signal for exhibition of a normal image and a second video signal for exhibition of a horizontally elongated image. An upper-lower portion average brightness calculation section receives an input video signal to form an image and calculates an average brightness of upper and lower portions (black band portions) of the image. An upper-lower portion brightness difference calculation section calculates differences between the average brightness and brightness levels of the black portions of the image. A high brightness difference rate detection section discriminates whether or not the rate of the area of portions in the black portions in which the brightness differences are higher than a predetermined level is higher than a predetermined value.

Abstract: A receiver system automatically adaptively tunes to broadcast signals that are variable in the number of channels that are transmitted, their signal coding type and their modulation format. A system receives a digital bitstream representing video information encoded in one of a plurality of different formats, and transmitted on one of a plurality of transmission channels. The system includes a processor for identifying and capturing program guide information including a plurality of channel maps. A channel map associates a transmission channel with a video channel output and the channel map is also associated with an encoding format. The system also includes an adaptive decoder for decoding the bitstream to provide the video channel output in response to the program guide information.

Abstract: For many signal processing arrangements in TV receivers it is necessary to know the type of signal source. A plurality of parameters must be set depending on whether a standard-conforming source and hence a standard signal or a non-standard source (for example VCR) is involved. The circuit according to the invention is capable of making a statement in a TV receiver as to whether or not a source corresponding to the TV standard is present. For this purpose, the locking of the color subcarrier with the horizontal frequency is investigated and two different criteria (FSCFH, CCC) are utilized for the decision. The optimized setting of parameters in the receiver is possible with the aid of the decision made. Furthermore, the circuit provides, in the event of a standard signal, a highly stable sampling clock (fLL1) of the kind necessary, for example, for ColorPlus processing within the PALplus system.

Abstract: A synchronizing frequency of red (R), green (G) and blue (B) video signals is detected by a frequency detector. The resolution of the RGB video signals is calculated by a calculator. When the resolution of the RGB video signals is close to the resolution of a cathode-ray-tube (CRT), a high level signal is generated as a control signal from a control signal generator. When the high level signal is generated from the generator, the video bandwidth of the RGB video signals is limited by a video bandwidth limiting circuit to adapt the RGB video signal to characteristics of the CRT.

Abstract: An automatic aspect ratio switching apparatus for automatically switching an aspect ratio is provided. The apparatus includes a satellite intermediate frequency processor which demodulates the broadcast signal from an intermediate frequency signal received from the satellite. A decoder detects aspect ratio support data which is included in the satellite broadcasting signal. Based on this detected aspect ratio support data, the deflection of the electron beam in the display of the television receiver is automatically caused to correspond to the aspect ratio of the broadcast signal. Accordingly, an aspect ratio can be automatically switched according to the aspect ratio support data inserted on the broadcasting signal sent by a broadcasting station without manual operation of a key.

Abstract: According to the signal processing method of the invention, control data is previously generated by using the name of a control signal included in an object signal, and then, the object signal including the control signal is input. The name of the control signal in the control data is substituted with the content of the control signal included in the object signal, and then the object signal is processed by a signal processing unit by using the control data including the content of the control signal. Therefore, the signal processing unit can change the processing to be performed on the object signal in accordance with the content of the control signal included in the object signal.

Abstract: A video signal interface system for displaying video signals from various sources utilizing a deductive control technique for processing a video signal in response to measured characteristics associated the video signal. The measured characteristics are compared to stored characteristics associated with known video sources and to stored characteristics associated with previously processed video sources in order to obtain stored tuning settings associated with the respective video source. In the event that the measured characteristics do not match any of the stored characteristics, the measured characteristics are stored in memory to identify the new video source. The tuning settings in association with each video source are user adjustable.

Abstract: A system for switching video of two different standards that uses a single crosspoint matrix and a single local controller coupled to two memory blocks for storage of crosspoint selection data. The crosspoint selection data is written to the crosspoint matrix according to the video reference signals that correspond to the crosspoint selection data to be written. Switching of the crosspoints then occurs according to the video reference signal corresponding to the crosspoints to be switched.

Abstract: A method of automatically measuring the horizontal scan frequency of a composite synchronism signal, comprising horizontal synchronization impulses at line frequency, consists of first performing a count of a number of impulses having a repeat frequency higher than said line frequency, as intervening between two successive impulses at line frequency.The count value, corresponding to said number of impulses, is stored to obtain the line frequency of the signal, and thereafter, a series of down counts is effected, as initiated at predetermined times, until a change of frequency of the signal is detected.