Abstract: A method, and related device, for automatically selecting the demodulation standard of a video signal, useful with an intermediate frequency demodulator, which has an output for the demodulated signal and a so-called standard selecting input pin, consists of detecting the polarity of the demodulated signal at the output of the demodulator and comparing that polarity with the polarity of the input signal to the demodulator. The voltage value on the standard selecting pin is changed over on detecting a different modulation polarity between the input and output video signals to/from the demodulator to enable the latter to operate to the correct standard at all times.

Abstract: An information processing apparatus having a common A/D converter for the image and audio signals includes image pickup circuitry for converting an image into an image signal. Preferably, the image pickup means has an effective period and an ineffective period (e.g. a horizontal blanking interval). Audio pickup circuitry is provided for converting sound into an audio signal. A common A/D converter is provided for A/D converting both the image signal and the audio signal. Preferably, the image signal is A/D converted during the effective image pickup period, and the audio signal is A/D converted during the effective image pickup period. Preferably, the A/D converter has different sampling frequencies for the image and audio signals.

Abstract: An encoding method for controlling the operation of a luminance comb filter encoder for processing a quadrature modulated subcarrier color television signal includes the steps of:separating spectral components at the vicinity of the subcarrier quadrature modulation from a full bandwidth luminance signal,separating chroma spectrum components from the separated spectral components by comb filtering,multiplying the separated chroma spectrum components by a control signal to provide a product,subtracting the product from the full bandwidth luminance signal to provide a comb filtered luminance signal, andgenerating the control as a function of motion detected to be present within the picture image of the full bandwidth luminance signal.

Abstract: A high definition television system that is characterized by low transmission bandwidth is achieved by removing redundancies in the signal, encoding the remaining signals, and transmitting the encoded signal in a manner that is most compatible with the applicable standards. In the encoding, groups of signals to be sent are mapped to codebook vectors and the identities of the codebook vectors are sent together with those signals of the groups of signals that correspond to the codebook vectors. To insure that the total number of signals that are sent does not exceed the available capacity, the signals are sorted by a selected importance parameter and assigned for transmission in descending order of importance until the capacity is exhausted. Signals that are not assigned for transmission are discarded.

Abstract: This invention relates to a method and apparatus for processing a color video signal.

Abstract: A signal of the same frequency band as an ordinary NTSC signal of the video signals is transmitted with the conventional frequency band but the other frequency components are frequency-converted to a frequency higher than the sound subcarrier as the multiplex signal. The ordinary video signal, sound subcarrier and multiplex signal are frequency-multiplexed and the main carrier is transmitted by angle modulation as the modulation signal. In this case, as the multiplex signal, a signal other than the ordinary signal may directly be frequency-multiplexed and the signal may be multiplexed. Using amplitude or angle modulation to improve the demodulation accuracy or S/N through the angle modulation. The ordinary signal is regenerated like in the conventional system, without influence on the conventional receiver. In addition, since the ordinary video signal and the multiplex signal are separated in the frequency band, these may be used as the independent new transmission bands.

Abstract: A system and method of broadcasting in which both the entire show to be broadcast and segments of the show used as promotional material are retrieved from the same source recordings.

Abstract: A system is provided for processing an image signal composed of a luminance signal having a second frequency band including a frequency component higher than a frequency component included in a first frequency band and a color signal having the frequency component included in the first frequency band. The luminance signal is separated into a first luminance signal having a frequency component not higher than the frequency component included in the first frequency band and a second luminance signal having a frequency component higher than the frequency component included in the first frequency band. A frequency converter converts the second luminance signal into the first frequency band to output a frequency-converted second luminance signal. A multiplexer multiplexes the input color signal with the second luminance signal to provide a multiplexed signal.

Abstract: A method of displaying phase characteristics of a video signal is employed in a system that determines the phase angle between the color synchronization burst signal and horizontal synchronization pulses of a color video signal. The method includes selecting an image location on a display screen of video monitor and forming at the image location an image representing the value of the phase angle. The image is formed with a length along one axis passing through the image location and with a light intensity. One of the length or the light intensity is proportional to the value of the phase angle to provide an indication of the value.

Abstract: Video signal information derived from a high definition source is conveyed via two channels. A first channel conveys relatively low spatial resolution, high temporal resolution video information compatible with a standard television receiver. An auxiliary second channel conveys relatively high spatial resolution, low temporal resolution video information. A high definition television receiver reconstructs original high definition information from the first and second channel information.

Abstract: A widescreen television system includes an auxiliary subcarrier modulated with left and right side panel luminance and chrominance components. The chrominance modulating component represents the difference between the average side panel chrominance information and the original side panel chrominance information. Average left and right side panel chrominance information is respectively conveyed during the horizontal blanking intervals of alternate lines.

Abstract: In a picture-quality improving circuit, a luminance transition is detected on the basis of a luminance signal. Chroma edge characteristics of a color signal are enhanced in accordance with the detected luminance transition. A detection is made as to whether the color signal and the luminance signal are correlated or uncorrelated in transition. When the color signal and the luminance signal are uncorrelated in transition, the enhancement of the chroma edge characteristics of the color signal is interrupted.

Abstract: A P/S converter converts parallel digital video signals such as a luminance signal Y and color difference signals R-Y and B-Y to serial digital video signals which are written into a semiconductor memory. The serial digital video signals read from the semiconductor memory are converted in a S/P converter to parallel digital video signals. A clock generator supplies clock signals to the P/S and S/P converters, such that a phase of the clock signals for the S/P converter has a predetermined relation to a phase of the clock signals for the P/S converter. As a result, the number of input and output pins is decreased in the semiconductor memory to result in the decreased of the fabricating cost thereof.

Abstract: A method and apparatus for generating a multi-carrier high-definition television (HDTV) signal including a digital sound and sync (DSS) component, on a conventional television channel, for example, 6 Hz. MAC derived signal components are quadrature modulated on a plurality of subcarriers and combined in frequency multiplexed form to create an RF signal.

Abstract: In a transmitter/encoder system for processing a widescreen television signal having main panel and side panel information, side panel luminance information and side panel "Q" color difference information modulate one phase of a quadrature modulated 3.58 MHz auxiliary subcarrier, other than the standard NTSC chrominanced subcarrier, having a field reversing phase characteristics. the other (quadrature) phase of the auxiliary subcarrier is modulated with side panel wideband "I" color difference information. The "I" modulated component is filtered by an inverse Nyquist slope filter which mirrors the filter characteristics of Nyquist slop filter used at a receiver/decoder to achieve a desired flat amplitude response when the signal component containing the side panel luminannce and "Q" color difference information is demodulated.

Abstract: A method for encoding a high definition television signal comprising a first frequency spectrum portion for standard resolution and a second high frequency spectrum portion for high resolution consistent with the B-MAC composite signal format comprises the steps or orthogonally sampling the high definition signal, diagonally filtering diagonal resolution information, and decimating alternate samples of alternate lines for folding in high frequency horizontal resolution information by means of a skew-symmetric low-pass filter. A method at a standard television resolution receiver for decoding the high-definition television signal uses a simple low pass filter to recover the baseband television spectrum at standard television resolution.

Abstract: Method for automatically controlling the optimal tuning point for receiving teletext increases or decreases the tuning point of steps of a certain frequency for the byte error at each step tuning point to be detected and memorized so that the tuning point for the minimal byte error is found to provide the optimal tuning frequency for receiving a teletext, thus eliminating the inconvenience of manipulating a key to find the optimal tuning point from the display on a TV screen. The system of the method employs a microprocessor and teletext processor in addition to the tuner.

Abstract: A system for superimposing color characters on video reproduction signals. A character signal is modulated by a color subcarrier phase-locked to a burst signal of video reproduction signal, and the display position of each line is controlled by the pulse obtained on the basis of the horizontal synchronizing signal of the video reproduction signal. A desired color character can be superimposed on a video reproduction signal without drift of the character.

Abstract: A video signal processing device comprises a synthesizing circuit for synthesizing three signals delayed a unitary time with respect to each other, a detecting circuit for detecting correlations of these three signals, and an output circuit for selecting and outputting, on the basis of a result of detection of the correlations, two signals each indicative of an average value of the signals neighboring in terms of time and a signal which may exist intermediate the length of time. The correlation detecting circuit is operable to detect two of the three signals delayed a predetermined time T from each other, which have a closer correlation with each other. The output signal selecting circuit is operable in response to the result of detection performed by the correlation detecting circuit to output the signal indicative of the average value of these two signals having the closer correlation with each other, or the signal existing at the center of the length of time between these two signals.

Abstract: An image processing method is described for the hierarchical storage and display of high resolution digital images in a multiuse environment. The method makes reduced resolution versions of the original image available for quick display on video monitors while providing access to the full resolution image for making photographic quality hardcopies. This multiresolution method also provides for the efficient storage of the data resulting from the use of this method via a hybrid coding scheme. Several embodiments of the method are described.