Abstract: A cover structure for an electronic circuit module includes a circuit board and a box-shaped cover integrated to each other. An electronic component is mounted on the circuit board. The cover has at least one open side. The cover includes a top plate and a mounting leg. The top plate is disposed so as to oppose the circuit board. The mounting leg is joined to the circuit board. The mounting leg is bent and extends from an outer periphery of the top plate. The top plate includes a bend portion and a cutaway portion. The bend portion is connected to the mounting leg. The cutaway portion is provided near the bend portion.

Abstract: A cover structure for an electronic circuit module includes a circuit board and a box-shaped cover integrated to each other. An electronic component is mounted on the circuit board. The cover has at least one open side. The cover includes a top plate and a mounting leg. The top plate is disposed so as to oppose the circuit board. The mounting leg is joined to the circuit board. The mounting leg is bent and extends from an outer periphery of the top plate. The top plate includes a bend portion and a cutaway portion. The bend portion is connected to the mounting leg. The cutaway portion is provided near the bend portion.

Abstract: A compatible special effect signal can be produced without using an encoder or a special signal processor. Each of EDTV signals is divided into a main screen signal and a compensation screen signal. Compensation screen modification circuits modify the special position and size of the compensation screen signals such that the compensation screen signals match with the main screen signals in spacial position and size. The modified signals and the main screen signals are multiplexed in a frequency domain. The multiplexed signals are gated in response to a wipe signal and the gated signals are mixed with each other. The mixed signal is separated into the main screen signal and the compensation screen signal in the frequency domain. A compensation screen signal restorer circuit converts the frequency separated compensation screen signal into the original compensation signal which is mixed with the main screen signal to generate the wiped wide screen EDTV signal.

Abstract: A high quality non-interlaced television signal is generated without using a large size circuit. Interlaced television signals are obtained from four image pickup devices. A luminance or green signal in the interlaced television signals consists of two interlaced channels. These two channel luminance or green signals are simply combined to produce the non-interlaced signal without modifying the driving frequency of the image pickup devices.

Abstract: A cooperative adaptive low noise television system provides that, prior to transmission, the composite video is separated into chroma and luminance components. The luminance signal is adaptively pre-emphasized, with the amount of pre-emphasis being determined by the luminance transitions level, so that small transitions have more pre-emphasis than large ones. In the receiver, a received luminence signal is submitted to adaptive deemphasis in order to precisely cancel the adaptive pre-emphasis provided prior to transmission, thus reducing transmission noise while restituting a luminance signal free of pre-shoot, over-shoot or resolution losses.

Abstract: The present invention relates a television system by which it is possible to obtain a wide picture with improved vertical resolution over the entire screen of a television receiver without deteriorating the picture quality by avoiding multiplexing of the high-frequency component of the side panel upon the broadcasting screen, and more particularly to a television system which transmits a television signal of having an aspect ratio of 9:16 by the same raster as that of a conventional type television signal with an aspect ratio of 3:4 and which minimizes the black band-like portions appearing upon the upper and lower portions of the screen of a conventional type television receiver.

Abstract: A television system, in which a picture is transmitted from an oblong screen to a television screen having an aspect ratio of 3:4, which is different from that of the oblong screen, and wherein no-picture portions are developed within upper and lower sections of the television screen, signals are transmitted into such upper and lower no-picture portions of the television screen in accordance with detected non-moving and moving picture portions of the oblong screen so as to improve the resolution of the picture image displayed upon the television screen.

Abstract: A wide aspect signal is band-width limited in the vertical spatial frequency by a V-LPF. The wide aspect signal is band-width limited along the temporal spatial frequency and in the vertical and horizontal spatial frequency by a 1/60-sec delay unit, an adder, 1 1/60-sec delay unit, a selector, a V-LPF, and an H-LPF. A motion image signal can be obtained by an adder. A still image signal can be obtained by the selector. The motion and still image signals are mixed by a mixer in accordance with an image motion amount. An output from the substractor is processed by a vertical shifter, an H-LPF, and a 6.fwdarw.5 converter to provide a still image compensation signal Vh. A signal from the V-LPF is compressed in the vertical direction by a 6.fwdarw.5 converter so as to be a center portion signal which can be displayed as an image with the receiver of the existing television system, and supplied to a selector. An output signal from the 6.fwdarw.

Abstract: An apparatus for transmitting an NTSC color signal superposed with a signal corresponding to monochromatic characters with a colored contour, which is obtained from a color character super device, comprises a first circuit responsive the NTSC signal from the color character super device to determine an area on a television receiver screen on which signal out of NTSC signal standard may be displayed, a second circuit for deriving chrominance signal spectrum out of NTSC standard and means for gating the chrominance signal spectrum with an output of the first circuit and then for subtracting the gated chrominance signal spectrum from the NTSC signal to thereby at least reduce signal component thereof out of the NTSC standard signal.

Abstract: The present invention is ingeniously conceived for a transmission system for a first television signal so as to enable a first television signal of a wide aspect screen to be transmitted in one channel and the transmitted television signal to be reproduced on a receiver of a conventional aspect screen. To this end, a screen dividing circuit (12) divides a wide aspect screen signal into a center panel signal and side panel signals. The center panel signal is supplied via a delay circuit (13) to an adder (16). The side panel signals are so allocated as to provide horizontal and vertical signals. The horizontal side signal is supplied via a horizontal overscan multiplexing circuit 16 to the adder (16) where it is multiplexed on a horizontal overscan area of the center panel signal. In the vertical overscan multiplexing circuit, the vertical side signal is time compressed and reverse processed for each line to provide it in a continuous form.

Abstract: A high resolution color television system, in the transmitting device of which part of pixels are thinned out in both horizontal and vertical directions and the remaining pixels are vertically gathered in the central portion of the image screen to form an image signal, leaving upper and lower blank portions, and horizontal and vertical informations indicating the quantitative relations between the removed pixels and the vertically and horizontally adjoining pixels are treated as first and second auxiliary signals and inserted in the upper and lower blank portions to form a television signal for transmission, and in the receiving device of which the image signal and the auxiliary signals are separated from the television signal and respectively treated in a manner opposite to that in the transmitting device to recover the original image signal for display by a kinescope.

Abstract: An anti-ringing device for a television signal transmission system in which the frequency band of a luminance component of a video signal from an image device is limited to prevent visible ringing at the receiver. The device includes a signal delay circuit 2 for delaying the video signal obtained by the image device, a low-pass filter 3 capable of changing the frequency band limitation characteristics thereof, a discriminator 4 for providing an output when the luminance component of the video signal contains a source of ringing, and a switch 5 for normally connecting the output of the delay circuit to a signal processor 6. The switch is responsive to the output of the discriminator for connecting the low-pass filter to the signal processor instead of the delay circuit, whose delay time corresponds to the signal processing time required in the discriminator.

Abstract: In transmitting, on a transmission side, a laterally long image whose aspect ratio is different from a usual television screen having aspect ratio of 3:4, with a top and a bottom portions of the screen being image-free, auxiliary signal obtained by shifting a signal component corresponding to a different in frequency band determined by the number of scan lines corresponding to a height of the image and a signal component exceeding a horizontal frequency band determined by a luster line length to lower frequency sides, respectively, are inserted into the image-free portions, which are used in a receiving side. In the receiving side, the auxiliary signals are separated in time from the image signal and processed separately.

Abstract: A amplitude characteristics of TV vertical frequency signal is improved by operating amplitudes of luminance signal obtained from a horizontal scan in a field and luminance signals obtained from a preceding and a subsequent horizontal scans in the same field and those luminance signals obtained in a preceding field, simultaneously.

Abstract: A low-noise televison system having means for suppressing increased noise without reduction of improved picture quality. In the television broadcast transmitter, a television video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components. The high frequency component is pre-emphasized in a specific emphasis characteristic relating to the amplitude of the low frequency component and the pre-emphasized high frequency component is then combined with the low frequency component and further matrixed with the chrominance signal to recover the video signal to be transmitted. In the television receiver, the received video signal is separated into luminance and chrominance signals and the luminance signal is further separated into high and low frequency components in similar fashion to the transmitter.

Abstract: A music information transmission system in which a music symbol on a music sheet is quantized into a digital signal by inputting that music symbol by using a key board. The digital signal is assembled into a packet, which is multiplexed on a blanking period of a television signal, and is transmitted over the air. At a reception side, the packet is separated from a picture signal, and is stored in a memory. A music player reads out the memory, and decodes the digital signal in the memory. The decoded signal operates the music player to play music. Thus, music information may be transmitted in a very narrow frequency band as compared with a conventional PCM system which quantizes an analog sound signal into a digital signal. The present invention is useful for instance for playing background music in a teletext or a character transmission system multiplexed with a television signal.