Nippon Television Network Corp.

Kabushiki Kaisha Toshiba

Oki Electric Industry Co., Ltd.

Kabushiki Kaishi Toshiba

Keio Electronic Laboratory Corporation

Yoshihide Kimata

Yoshio Sugimori

Kiyoyuki Kawai

Yoshihiko Ogawa

Yosai Araki

Seijiro Yasuki

Tadao Kurosaki

Joji Urano

Koichi Nakagawa

Masayuki Ishida

Toshiya Ito

Susumu Takayama

Tomoji Arai

A processing apparatus employs motion-adaptive processing to create a progressive scanning signal from an interlaced television scanning signal. The interlaced scanning signal is input to a field delay circuit and to a vertical highpass filter, the output of the field delay circuit is input to a field delay circuit and to a vertical lowpass filter, and the output of the field delay circuit is input to a vertical highpass filter. The outputs of the vertical highpass filters are added together at an adder. The output of the adder is added to the output of the vertical lowpass filter to create an interpolation signal. The interpolation signal and direct-type signal, being time-compressed, are coupled to a switch where they are alternately selected to obtain a progressive scanning signal with improved image quality, irrespective of whether the input signal represents a still or moving image.

Processing apparatus for progressive scan generation of a television

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.

Video switcher apparatus for wide screen EDTV signals

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.

Color television camera with details of luminance signal formation

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.

Television system

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.

Television system for transmitting auxiliary image signals in the black

A first image signal for a screen wider than that obtained by a TV signal of an existing television system is converted to a multiplexed signal that can be reproduced with a receiver of the existing television system, and input to a selector. The selector divides the input signal into a center portion signal and upper and lower black bar portions signals of the screen. The multiplexed signal has a center portion signal as an image display portion and upper and lower black bar portion signals as non-image portions. A difference signal (first LD signal) is multiplexed on the upper and lower black bar portion signals. A rearranging unit, a 5-time expander, a double speed converter, a delay unit, and a selector reproduce the first LD signal from the upper and lower black bar portion signals. A delay unit and a double speed converter double-speed convert the center portion signal. A line interpolator and a selector generate a progressive scanning signal. A 5.fwdarw.6 converter expands the progressive scanning signal in the vertical direction. The first LD signal is added to the interpolated scanning line of the first field by an adder. An LD generator generates a second LD signal from the compensated progressive scanning signal in the same manner as on the transmission side. A line interpolator and a selector also generate a progressive scanning signal. The second LD signal is added to the interpolated scanning line of the second field by an adder.

Multiplexed signal receiving apparatus

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.5 converter is processed by an LD generator to generate a motion image compensation signal (LD signal). The LD and Vh signals are selectively output from a mixer in accordance with the image motion. A compensation signal output from the mixer is processed by an H-LPF, a 1/5-time compressor, and a rearranging unit, so that it can be multiplexed on upper and lower black bar portions formed on upper and lower portions of the center panel, and supplied to the selector.

Multiplexed signal transmitting and receiving apparatus

Addition signal multiplexing apparatus for a television system

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.

High resolution color television system

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.

Anti-ringing device for television transmission system

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. The high frequency component is de-emphasized in a characteristic opposite of emphasis characteristic of the transmitter in accordance with the amplitude of the low frequency component and the de-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 displayed.

Low-noise television system

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.

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Tokyo, Japan

Yoshihide Kimata