Abstract: Circuitry for selectively reducing noise which results from film granularity, circuitry imperfections and other sources of random signal degradation by averaging, non-recursively, between 2 and 9 frames of digitized video information. By such averaging, since the noise is random, it is filtered out leaving only the desired picture. The averaging is performed only on areas of the picture which are close in both amplitude and color in adjacent frames. In this connection, in cases where there is no motion or scene change between adjacent frames, the entire picture corresponding to such frames can be processed according to the present invention.

Abstract: A high index color encoding system (10) is provided for the purpose of receiving RGB video input from a personal computer or similar device and generating video signals in other formats for use by conventional video equipment. The color encoding system (10) includes operational circuitry (30) adapted to shape and modify the chrominance portions of the signals at a relatively high carrier frequency of four times the NTSC standard frequency with the lower NTSC output carrier being reconstituted by a doubly balanced mixer (266) component, thus substantially improving signal quality. The operational circuitry further includes synchronization generation circuitry (148), a Y, I, Q matrix (66) for creating luminance and chrominance components from RGB signals, an I, Q modulator (96) for producing high quality chrominance output and a dynamic aperture (246) for enhancing the rise slope of the luminance signal, among other components.

Abstract: A jet nozzle for use in propelling a trolley or sledge provided with a television or video camera along a conduit, such as a sewer, for use in inspecting the interior of the conduit, the jet nozzle comprising a casing having an end wall provided with a plurality of discharge openings communicating with a chamber formed between said end wall and a transverse wall, an inlet in communication with the chamber and connected to a home, a bearing provided on the casing mounting a connector member for connecting the jet nozzle to the trolley or sledge and allowing the casing to rotate relative to the connector member.

Abstract: A time-division bit number circuit that comprises a bit number expansion system and/or a bit number reduction system. The bit number expansion system converts an N bits signal to a 2N bits signal, while the bit number reduction system converts the 2N bits signal to the N bits signal where N is an integer. Thus, according to the time-division bit amount circuit, the number of memory can be saved, the area of circuit can be reduced and the pattern area of substrate can be reduced.

Abstract: A video IF signal detector includes a first phase detector detecting a phase difference between an input video IF a signal and a first reference signal. A low pass filter acts on an output signal from the first phase detector. A VCO generates the first reference signal and a second reference signal in response to an output signal from the low pass filter. The first reference signal and the second reference signal have a fixed phase relation with each other. The first phase detector, the low pass filter, and the VCO compose a PLL. A second phase detector detects a phase difference between the input vido IF signal and the second reference signal and extracts a baseband video signal from the input video IF signal. The PLL is enabled during a first period where the input video IF signal is independent of display information. The PLL is disabled during a second period where the input video IF signal represents the display information.

Abstract: A motion detector detects motion of pictures represented by a composite color television signal and generates a motion signal representing the detected motion of pictures. A spatiotemporal filter extracts a color signal from the composite color television signal. A subtractor subtracts the color signal from the composite color television signal and thereby generates a luminance signal. The spatiotemporal filter includes a spatial filter. A pass band of the spatial filler is varied in accordance with the motion signal.

Abstract: An image processing system comprising a first and second video signal sources providing a main-field video signal and sub-field video signal, respectively, means for compressing the sub-field video signal on the time axis, and a signal merging unit which merges the compressed sub-field video signal into the main-field video signal and delivers the resulting signal to a television receiver set, wherein the signal compressing means comprising a dual-port memory having a first and second ports and operating to compress the sub-field video signal on the time axis and store the compressed signal, and control means for controlling the reading and writing of the memory for the sub-field video signal, the control means comprising a first control section for writing the sub-field video signal into the first port of said memory, a second control section for transferring a signal from the first port to the second port, and a third control section for reading out a signal from the second port, said memory implementing th

Abstract: An extended definition television (EDTV) system transmits, receives and displays both EDTV and NTSC signals using a NTSC channel bandwidth. The system procudes an EDTV broadcast signal having a picture with a 16:9 aspect ratio and at least one adjacent horizontal border to produce an overall image apsect ratio of 4:3. Picture information is also selectively modulated onto the horizontal border. The EDTV broadcast signal is transmitted in a NTSC format, and a receiving circuit is provided comprising a display with a 16:9 aspect ratio, a detector for determining whether an EDTV or other type of signal is being received, and an expansion circuit responsive to the detector to produce an expanded picture for display. When an EDTV signal is received, it is expanded and filtered vertically and is expanded horizontally and the 16:9 picture is displayed on the 16:9 display. The receiving circuit derives picture information from both the picture portion and the border portion of the EDTV signal.

Abstract: A digital television receiver capable of storing a desired television image information in response to an image storage instruction signal and reproducing the stored image information as a still image on the screen of a display tube (116) at any time as required. This digital television receiver comprises a control circuit (117', 122a) for writing desired image information in any of field memories (120a, 120b) in response to pressing of a memo key (128) of a remote controller (118), and a control circuit (117', 122b) for repeatedly reading out image information written in the field memories (120a, 120b) in response to pressing of a call key (129) of the remote controller (118) and supplying the information to a color matrix circuit (114).

Abstract: A focus adjustment changeover circuit for a projection display television receiver having red, green and blue-emission CRTs includes a changeover switch for selecting an operating mode in which a level of current is supplied to the static focus coil of the blue-emission CRT such as to precisely focus the electron beam of that CRT, so that projection lens focus adjustment for that CRT can be easily performed with a test pattern signal being projected, and an operating mode in which the current supplied to that static focus coil causes the electron beam of the blue CRT to be slightly defocused, so that white balance adjustment of the television receiver can be executed while a television picture is projected.

Abstract: A motion detector detects motion of pictures represented by a composite color television signal and generates a motion signal representing the detected motion of pictures. A spatiotemporal filter extracts a color signal from the composite color television signal. A subtracter subtracts the color signal from the composite color television signal and thereby generates a luminance signal. The spatiotemporal filter includes a spatial filter. A pass band of the spatial filter is varied in accordance with the motion signal.

Abstract: There is provided a data transmitting system for digitizing color video data and transmitting, in which one picture plane is divided into a plurality of picture planes, every area corresponding to n (n is an integer 2 or more) luminance signal blocks as a unit for block encoding of a luminance signal and also corresponding to m (m is an integer less than n) chrominance signal blocks as a unit for block encoding of a chrominance signal, and the luminance signal and chrominance signal included in each area are respectively block encoded and are included in the same sync block and transmitted.

Abstract: A composite video signal generation method and device comprises circuits for processing a digital signal, by which the circuits can be integrated. The method comprises the steps of calculating a digital luminance signal and two digital chrominance signals combined from digital primary color component signals, balance-modulating a subcarrier by the two digital chrominance signals, and combining the balance-modulated signals and the luminance signal. In the balance-modulation step, a series of phase information values by adding one by one a value of a sampling period of the digital primary color component signal per a subcarrier period is obtained, cosine function values and sine function values are operated in response to the phase information values, and the cosine function values and the sine function values are multiplied by the two digital chrominance signals, respectively.

Abstract: In this invention, by using first and second 1H delay means, first to third band pass means near 3.58 MH.sub.H, first to third polarity inverting means, first to fifth adding means and first to third intermediate value detecting circuits, from a composite video signal fed as an input, a chrominance signal in which no luminance signal component is mixed can be obtained, a chrominance signal having no such resolution reduction as dulling in the vertical direction can be obtained and a luminance signal having no chrominance signal component mixed in and having no such resolution reduction as dulling in the vertical direction can be obtained. Further, a chrominance signal component can be effectively separated in the edge part of a video image in which the luminance variation is large.

Abstract: A frame buffer memory capable of storing video data for plural frames of pictures with memory areas irrelevant to the display being reduced to a minimum, which video data consist of a number of pixels unequal to a power of "2" in the vertical and horizontal directions, respectively. The frame buffer memory is realized by using multi-port video RAMs and includes a plurality of regions for display and auxiliary regions. The regions for display includes at least first and second display regions which partially overlap each other. The auxiliary regions store the video data contained in the overlapping portion (overlapping region) of the first and second display regions, the video data stored in the auxiliary region being transferred to the overlapping region as occasion requires.

Abstract: In a color television system, the color signals produced by a luma-chroma IC are summed to produce a signal representative of processed luminance information not otherwise readily available. Pulses of the summed signal corresponding to retrace blanking pulses contained in the color signals, are stripped away in order to reduce errors when attributes of the summed signal are determined, e.g., by an average detector. The detector provides a control signal for modification of a luminance signal, such as by "white stretch".

Abstract: An adaptive comb filter employs vertical and horizontal edge detectors to selectively activate a vertical high-pass filter and a horizontal band-pass filter during the occurrence of vertical and horizontal edges in a received television signal, for use in the chrominance/luminance separation process. Artifacts such as "hanging dots" and "crawling dots", inherent in prior art comb filter circuits during the occurrence of vertical and horizontal edges in the composite television signal, are greatly reduced in the process.

Abstract: A method and apparatus for causing a video camera to produce a video signal to selectively cue special effects, comprising an optical chromakey field including a transparent assembly an illumination apparatus. The transparent assembly is placed in the field of view of the video camera. The on-camera talent can see through the transparent assembly to view a monitor or other object located behind the transparent assembly. The illumination apparatus selectively illuminates the transparent assembly. The transparent assembly presents light of a certain color for reception by the video camera. When special effects are selected, the video camera produces a characteristic video signal operative to cue the special effects.

Abstract: A method and apparatus for keying digital color TV signals without exceeding the normal sampling frequency (13.5 MHz) and without obtaining a degraded image. A digital keying signal and a digital color TV signal are supplied to upsamplers (10,12), respectively, which double the sampling frequency of the incoming signal by linear interpolation. The 27 MHz sampled outputs are keyed in multiplier (14). In one line to a switch (24) the 27 MHz, 12 MHz bandwidth keyed signal is passed through low pass filter (16) and demultiplexer (18). The latter removes each alternate sample to provide a 13.5 MHz signal of 6 MHz bandwidth. In a second line to the switch the keyed signal is demultiplexed to provide a signal which would have resulted without upsampling, which is then delayed (22). Edge detector (26) senses high frequency keying signals and controls switch (24). In the absence of such high frequency keying signals the signal to the second line to the switch is taken.

Abstract: A system for encoding a progressive scan widescreen EDTV signal so as to be compatible with a standard NTSC receiver develops an auxiliary signal containing vertical-temporal information derived from image frame difference information of the progressive scan signal. The auxiliary signal facilitates the conversion of the encoded NTSC compatible signal to pro-scan format in a widescreen progressive scan receiver.