Abstract: A process for correcting the input-output correspondence of an analog-to-digital converter includes calculating the equation of the actual input-output correspondence, for known input values, during programmed conversion suspension periods. A comparison with the ideal conversion line subsequently makes it possible to calculate the necessary offset and gain corrections. The process is applied to the digital conversion of a plurality of component video signals.

Abstract: A system for delivering selective VCR control codes to programmable settop terminals over a CATV communication system includes a headend for storing and transmitting VCR control code information to the settop terminals and a plurality of settop terminals for receiving the control codes. The CATV communication system delivers the VCR control codes to individual subscribers within the vertical blanking interval of one of the broadcast channels or over a control data channel. A set-up procedure is required for each VCR to determine the appropriate set of VCR control codes. Upon determining the specific type of VCR the subscriber has, the VCR control codes transmitted through the CATV system are stored in the settop terminal in non-volatile memory. Since the settop terminal only stores the VCR control codes for a single type of VCR, memory requirements are minimized.

Abstract: A video signal memory holds blocks of data representing luminance and first and second chrominance signals, the first and second chrominance signals being held in interleaved rows within the blocks, data being transferred from said blocks to a temporary store for use by a processor in predicting picture frames from the stored data.

Abstract: A method and system for separating chrominance and luminance information from a composite spectral signal is disclosed. The method and system comprises demodulating the composite signal prior to separation of the chrominance or luminance information to provide a first U subcomponent and a first V subcomponent and then processing and filtering the first U subcomponent and the first V subcomponent to provide a second U subcomponent and a second V subcomponent, respectively. The method and system also includes combining the second U subcomponent and the second V subcomponent to provide the remodulated chrominance information. In so doing chrominance information is provided in which artifacts are substantially attenuated.

Abstract: An image processing device for displaying a sub window of second video data on one part of a main screen by switching first video data for the entire screen and the second video data for the sub window includes an analog-to-digital converter for digitizing the second video data and a data sampling circuit for sampling and compressing the digitized video data at a subsampling frequency. The device further includes a memory for reading out and storing the compressed data sampled in the data sampling circuit; a first switching circuit including a data expansion circuit for generating video data for the sub window by expanding the image data read from the memory; a digital-to-analog converter for converting the image data expanded in the data expansion circuit to obtain analog data; and a second switching circuit for switching the video data for a sub window output from the digital-to-analog converter to insert the video data in the sub window into the first video data.

Abstract: A counter control circuit of a counter for measuring a pulse period of a video synchronization signal includes a main control unit having a synchronization signal input Sync, and a control signal producing unit including a stop signal generator, a latch signal generator, and a start signal generator. The outputs of the stop, latch and start signal generators are supplied to the counter for controlling the counter to count clock pulses fed from a clock generator in response to receipt of a start signal and output a count value in response to receipt of a latch signal. The main control unit produces sequential control signals during the input of the video synchronization signal differentiated by the clock pulses. The counter control circuit allows the counter to measure a pulse period of an input synchronization signal in a stable state that results in an accurate count value, since the count operation is first stopped and the count value is latched by the clock signal.

Abstract: A method and apparatus for recovering an information carrier which has been transmitted as a sub-carrier in the lower VSB spectral region of a television signal. The invention utilizes a spectral inversion method to shift the data carrier frequency from the normal VSB spectral region to a spectral region normally associated with video information in a standard television signal. The data carrier is then recovered using a standard video demodulator and provided to a data utilization circuit, such as a QPSK demodulator.

Abstract: A burst gate pulse generator generates a burst gate signal representative of a time period during which a burst signal is present within an input composite video signal. Each period of the input composite video signal includes a horizontal synchronization pulse, a burst signal and a video information signal. The burst gate pulse generator detects the end of the horizontal synchronization signal and begins the burst pulse at the end of the horizontal synchronization signal. A timing circuit including a charge storage device and a charge delivery device controls the duration of the burst pulse. When the burst pulse is activated the charge delivery device begins building a charge across the charge storage device until a threshold value is reached. Once the charge stored across the charge storage device equals the threshold value the burst pulse is deactivated. During the time when the burst pulse is active, the burst signal will be present on the input composite video signal.

Abstract: Video camera which emphasizes an outline of a video signal produced thereby. A detail signal of a video image represented by the video signal is generated and which represents a vertical outline emphasis signal. Edges of the video image and burst-like portions of the video signal are detected, and an edge detection signal is generated that corresponds in one manner to the detected edges and that corresponds in another manner to the detected burst portions. The detail signal is adjusted by the edge detection signal or by a cross color suppression signal generated from the vertical outline emphasis signal. The video signal then is modified by the adjusted detail signal so as to produce the outline emphasized video signal. The detail signal may also be adjusted by a gain setting signal that corresponds to the vertical outline emphasis signal and which is compressed in level when the vertical outline emphasis signal is relatively low.

Abstract: An apparatus and method for processing moving image data so as to obtain stationary image data representative of a desired image frame which is suitable for display on a display device. A moving portion of the image data corresponding to the desired image frame is detected and the image data corresponding to the detected moving portion is interpolated in accordance with a predetermined interpolation technique. A stationary image corresponding to the interpolated image data may be displayed on the display device with relatively high quality. The motion detection and field interpolation processing may eliminate or reduce stripes or the like which may otherwise be present in the displayed stationary image due to a deviation of the image data between the fields of the respective frame. Coefficients utilized for the motion detecting processing may be taken from previously stored values or may be set by an operator.

Abstract: A process and system for synchronizing a video signal to the sampling period of a client system. The synchronization may be suitably implemented by adding or deleting trailing lines from each frame of video data to adjust the frame to match the sampling period of the client system. The synchronization system minimizes the lag between the time a video signal is delivered to the client system and the time the client system responds. The low lag time enhances the responsiveness of the client system to human inputs, and improves the suitability of the overall system to human use. The synchronization system can be achieved using suitable low-cost hardware and is therefore particularly well suited for video game or virtual reality systems designed for home use, increasing the feasibility of employing video inputs in such systems.

Abstract: A communication control device and method which can perform communication tasks such as computer communication, facsimile transmission and reception utilizing a television receiver. A user can select one of a television mode, a computer communication mode, and a facsimile mode by means of a television/communication switching section, thereby enjoying multifunction with the television receiver. The device includes an image interface section for performing interlaced scanning suitable for television screen display. The user may enjoy computer communication and facsimile transmission and reception as well as television function by means of a remote controller and a keyboard. The facsimile data may be recorded or reproduced by an external video recording/reproducing apparatus.

Abstract: A method to compensate for a fade in a digital video input sequence is provided where the video input sequence is to be compressed according to the MPEG-2 video compression standard. The method comprises a first step of dividing each frame of a current frame into two fields. In a second step, each field of the current frame is divided into at least one field band. In a third step, the luminance and chrominance pixel values are individually summed for the pixels in each field of the current frame. In a fourth step, the luminance pixel values are summed for the pixels in each field band of the current frame. In a fifth step, each respective field band sum and field sum of the current frame is compared with that of the previous frame in the video input sequence. In a sixth step, detection of whether or not a fade has occurred is provided, based upon the comparison in the fifth step. In a seventh step, the encoding algorithm is adjusted if a fade has occurred.

Abstract: A communication system (100) employs a method and apparatus for communicating video information therein. A first communication device (e.g., 101) preferably includes a video compressor (203), a memory device (205) containing a computer program, and a modem (207). The first device receives video information from a video device (116) via the video compressor and executes the computer program to determine a priority between transmission frame rate and resolution per frame. When transmission frame rate is of higher priority, the first device transmits the video information at a first transmission frame rate via the modem to a second communication device (e.g., 102). When resolution per frame is of higher priority, the first device transmits the video information at a second transmission frame rate that is less than the first rate. The second device, upon receiving the video information, may display (113) the information or process the information for retransmission (e.g.

Abstract: A sync signal processing device for a combined video appliance capable of directly processing a personal computer (PC) signal through a television (TV) receiver circuit to achieve the horizontal and vertical driving and deflection. The device can prevent the vertical trembling phenomena of the displayed picture and on-screen display by compensating for the sync frequency difference between the PC signal and the TV signal. According to the devices either a TV sync signal or a PC sync signal is selected in accordance with a selected TV/PC mode after the PC sync signal is frequency-converted and the selected PC sync signal is processed through the TV sync signal processing circuit. Either the horizontal driving pulse signal form the TV sync signal processing circuit or the horizontal driving pulse signal produced from a separate horizontal oscillation circuit is selected and outputted to a horizontal output circuit in accordance with the selected TV/PC mode.

Abstract: A television signal receiving tuner comprises a variable attenuating circuit for attenuating an inputted television signal and outputting the attenuated signal, a preamplifying circuit for amplifying the attenuated signal outputted from the variable attenuating circuit, an input tuning circuit for tuning the amplified television signal outputted from the preamplifying circuit, and a variable gain amplifying circuit for amplifying the tuned television signal outputted from the input tuning circuit.

Abstract: A broadcasting and communication receiver apparatus for displaying program-associated information, in which, in addition to a predetermined display zone, another display zone is provided so that display data of specific information selected by a viewer is wholly displayed and, when the display data is displayed as omitted, a symbol indicative of the information omission is attached to the display data to display the display data within the limited display zone. The apparatus comprises a receiver for receiving the program-associated information including a title, start and end times of a broadcast program together with a video signal and an audio signal, a decoder for decoding the program-associated information, a display unit for displaying the decoded program-associated information thereon, a command receiver for receiving an input signal from a remote controller or from a key or keys provided to the receiver, and a display controller for controlling a display screen on the basis of the input signal.

Abstract: Digital broadcast receiving terminal apparatus which receives multi-channel digital broadcast signals to record the huge capacity without deteriorating the quality of signals and to visualize the digital broadcasting. The outputs form the error correction decoding circus 4 are applied to the TS processor 12 via the switches SW 1 and SW 2, at the same time they are applied to the recording program selector 11. The recording program selector 11 applies the encoded data of the predetermined program to the digital interface 13, the digital interface 13 inputs and outputs the encoded data through bus in the IEEE1394 specification for example. Thus, the encoded data are applied to the external equipment and recorded as they are, and the degradation of the quality can be prevented. The switches SW 1 and SW 2 changes the receiving signals and the outputs from the digital interface 13 and applies them to the TS processor 12. The TS processor 12 depacketizes the input encoded data.

Abstract: A monitor protection system comprise a display power management signaling (DPMS) operating unit for performing a predetermined power control; a horizontal deflection detecting circuit for detecting a horizontal deflection signal from a horizontal deflection circuit; a vertical deflection detecting circuit for detecting a vertical deflection signal from a vertical deflection circuit; and a control circuit for determining whether the horizontal deflection signal and the vertical deflection signal are normal, and generating a predetermine control signal to run the DPMS operating unit in order to observe the conditions of horizontal/vertical synchronization signals continuously, and protect a CRT monitor independently from the horizontal/vertical synchronization input conditions.

Abstract: The invention is a method and apparatus for processing an MPEG-like bitstream comprising information frames having associated timing parameters. The method and apparatus identify one or more non-referential information frames containing at least a threshold number of bits, remove one or more of the identified non-referential information frames and modify the timing information associated with each information frame following the one or more removed information frames.