34 results about "Television lines" patented technology

A television line doubler (interlaced to progressive scan converter) incorporating the following aspects—an improved field motion detector which does not treat low frequency vertical transitions as motion; a frame motion detector having an improved ability to differentiate motion from subcarrier signal components; a sawtooth artifact detector; a sawtooth artifact detector in combination with a film pattern detector, such that the artifact detector can take the film pattern detector out of film mode earlier than it would if it only were responsive to a break in the film pattern; tandem field motion detectors; an improved field based film detector; film pattern detectors and motion detectors used therewith which operate by performing end-of-field calculations; the combination of a field motion detector and a frame motion detector such that the frame motion detector provides a motion signal used as a verification by the field motion detector; an improved NTSC film detector requiring a minimum number of NTSC film pattern sequences; and an improved PAL film detector employing a minimum motion threshold detector.

The present invention relates to a CCD camera resolution measurement device based on triangle direction identification and a method thereof, belonging to the photoelectric test field. The device comprises a CCD camera to be measured, a resolution target, an even illumination lamp house and a high resolution monitor. The revolution target adopts an equilateral triangle pattern to substitute an ordinary grid pattern. In the test process, the identification of the orientation of the equilateral triangle substitutes the conventional fringe resolution so that the Morie fringe influence in the conventional grid pattern resolution test can be effectively avoided. The television line number corresponding to the correct decision probability higher than 75 percent is determined to be the limiting resolution of the camera. In order to improve the measuring accuracy, a value interpolation calculation is adopted for the standard grid interval so scheme out a novel television resolution target. The measurement accuracy can be largely improved by cooperating two targets. The method and the device can be applied to the performance evaluation of various visible light CCD cameras.

The invention relates to a method for manufacturing a television line chart for testing the resolving power of a photoelectronic imaging system. The manufacturing method comprises the following steps: gathering parameters for manufacturing the chart, and calculating the optimal focusing distance; calculating the line pair length of the possible measuring range of the optical system according to the parameters; filming the manufactured line pair with an optical imaging system to be tested, and taking 80% of the ultimate resolution line pair as the basis; testing whether the resolving limit of the filming area falls in the line pair, and if yes, measuring the size of the chart in the focusing position; and determining the optimal line pair combination in all the areas for manufacturing the chart. Compared with the prior art, the invention has the following advantages: the resolving power of the optical system to be tested can be subjected to a quantitative test; the universality is good; the problem that the focusing distance is limited by the size of the chart is solved; the cost is low; the imaging conditions of the testing areas can be reflected more clearly; the invention can not be limited by the number of pixels or the definition; and with the Chart information, the invention is more suitable for mass production.

A new copy protection signal includes resistance to certain circumvention devices and includes improved playability. The new copy protection signal causes the certain circumvention devices to pass substantially the copy protection effects to a video recorder or to allow for content control effectiveness on a compliant device. The new copy protection signal also causes the circumvention device to add or enhance copy protection effectiveness, which is contrary to the circumvention device's original intent of removing or reducing copy protection effectiveness. The new copy protection signal is provided by inserting or adding one or more pseudo sync pulses or one or more pseudo sync/AGC pulse pairs immediately after, or one line after, a vertical sync signal in at least one television line.

The invention discloses a no-power-line television based on a Type-C interface, comprising a sound box, a signal board and a display module. The signal board is arranged in the sound box; the signal board comprises a power supply module, a switch module, a first Type-C interface and an audio frequency processing module; the display assembly comprises a second Type-C interface, a display driving module, a control module and a display screen. The invention can realize signal transmission and power supply through arranging the signal board in the sound box, outputting 5V,12V and 20V voltage to various module for supplying power, integrating all interfaces on the sound box, and thus the signal and television display can be finished through the Type-C interface. In the meantime, the television line can realize the plugging in both directions and provides convenience to usage.

The invention discloses a DBA (dynamic bandwidth allocation) algorithm for realizing TDMA (time division multiple address) access in a C-HPAV network communication system realizing the community antenna television broadband access EOC standard of the State Administration of Radio, Film and Television through a cross-layer network flow predicting method. The method includes that on the basis of a C-HPAV system architecture, during TDMA time slot DBA, in a CLT (coax line terminal), and for each CNU (coax network unit), namely an EOC terminal, an MAC layer records the number of physical layer PBs sent by uplink and downlink of each period of the CNU in continuous N communication periods, a sequence of the number of the physical layer PBs counted by the MAC layer in first N communication periods is taken as a sample, the sequence is subjected to weighted averaging to acquire a prediction value of the number of the physical layer PBs sent by the CNU in the N+1th communication period, the prediction value is taken as a basis for bandwidth allocation of the MAC layer, and self-adaptive dynamic bandwidth allocation is realized.

A transforming device for transforming computer graphics signals to television signals is provided. The transforming device includes a scaled-down line generating unit that receives the computer vertical line and generates the scaled-down vertical line, a controller that receives the scaled-down vertical line, and a scaled-down buffer that stores the scaled-down vertical line or the value of the scaled-down vertical line performed by the weighted-averages method. The content of the scaled-down buffer is transmitted to a weighted-averages operation unit, and then it is performed by the weighted-averages method with the next scaled-down vertical line. When a TV line is generated, it is the output of the transforming device. The present invention has the advantage of reducing the needed buffers in the transforming process and thereby reducing the cost.

The invention discloses a three-line hanging support. The three-line hanging support comprises a cross beam, a longitudinal beam and a fixing device connected with an electric rod. The cross beam comprises a fixed end and a connection end. The fixed end of the cross beam is connected with the fixing device. The longitudinal beam is perpendicularly fixed to the connection end of the cross beam. Insulators are further fixed on the cross beam on two sides of the longitudinal beam. The three-line hanging support has the advantages that after the device is used, an electric power line is connected with the insulators, a communication line and a broadcast television line are respectively hung on two ends of the longitudinal beam, the longitudinal beam is arranged to facilitate the fixing of lines and the installation of an equipment box; in addition, after the device is used, the lines on the electric rod are very clear, the electric power line, the television line and the communication line are separated from each other, a worker is no longer distributed by the lines when climbing the electric rod, and the line maintenance is convenient.

Provided is a subwoofer with volume being controlled by a television sound envelope line. The subwoofer comprises a low pass filter, an audio sensor, a frequency spectrum modification circuit and a voltage-controlled gain amplifier. The lower pass filter has an input end in connection with an output end of a television line and filters required lower-frequency audio signals. The audio sensor is disposed adjacent to a loudspeaker of a television. Audio signals of the television that are detected by the audio sensor go through the frequency spectrum modification circuit, and feedback of low sound and other unwanted components are filtered, thereby forming a level envelop line representing the real-time volume of the television. Then the volume of the low-frequency audio signals outputted by the low pass filter is controlled by the level via the voltage-controlled gain amplifier. The low-frequency audio signals drive the loudspeaker after being amplified by an original low sound amplifier of the television. The subwoofer of the invention has the advantages that the subwoofer has a simple structure, is easy to implement, can be matched with all televisions, compensates the low sound components with low cost and significantly improves the sound quality.

The invention provides multipurpose pliers used for television line assembly. One pliers head of the pliers body is provided with a television line skin stripping groove and a television line inner sleeve stripping groove. The other pliers head is provided with a cutter which is used with the pliers head and can be debugged. A television line copper core diagonal cutter is arranged on the upper end of a pliers head. A fixed column which is used for being inserted into a television line connector is arranged on one side. A television line tightening clamp which is used in cooperation is arranged in the middle. When the multipurpose pliers is used, a television line is placed into the skin stripping groove; after the pliers body is shut, the pliers body is rotated to strip the skin; the television line is placed into the inner sleeve stripping groove; the pliers body is rotated to strip an inner sleeve; the inner copper core diameter is cut into a tilted head by the diagonal cutter on the upper end; the connector needing to be connected is spun on the fixed column; the television line and the copper core tilted head are directly inserted, and a sleeve hoop is spun off; the television line is placed into the tightening clamp, and the pliers body is shut to fix the connector. The multipurpose pliers provided by the invention have the complete function of television line assembly, and have the advantages of scientific structure and convenient use.

A CATV connector includes a tab and a wiring section, A tab end is provide at that end of the tab, At that end of the connected part, there is a terminal corresponding to the connected part, The terminal is connected with the connector end, the connector head forms a connector channel along a first central axis thereof, the connector portion forms a connector channel along a second central axis thereof, the connector channel is in communication with the connector channel, and the connector end is connected with the connector end in a rotational manner. The cable television connector provided by the invention can automatically recover the coiled line when the television line or the signal line is wound, thereby avoiding the bending or even breaking of the line due to the wound line, and prolonging the service life of the television line or the signal line.