Abstract: A channel memory device adopted for a television or video cassette recorder and the method therefor, can increase alternatives for channels, cope with the change of broadcasting station names and allow a quick and simple channel selection. The channel memory device includes a tuner for demodulating the broadcasting signal received via antennae, an IF unit for detecting the output signal of tuner, a decoder for decoding the broadcasting data output from IF unit, E.sup.2 PROM for storing channel data, a luminance and color signal processor for processing the output signals of IF unit and decoder, a microcomputer for controlling the channel selection and channel memory with respect to decoding and tuning the broadcasting data, and a display for displaying the broadcasting data.

Abstract: A Viterbi decoder for receiving and decoding a signal transmitted through a transmission channel in a vestigial side band (VSB) transmission system, in a high definition television (HDTV), which operates at the same speed as a symbol rate, can simply accomplish a hardware implementation using simplified memory system and a single decoder in order to restore an encoded signal, compared to the conventional art in which 12 decoders are used in restoring the encoded signal. Also, since the memory configuration thereof is regular, when it is intended to extend the observation sections, the memory structure can be extended easily. Moreover, the present invention can be adopted by extending easily to 3-bit 8 state or above as well as to 2-bit 4-state by means of a general Viterbi decoding algorithm.

Abstract: An electron gun for a large-sized color cathode ray tube has three cathodes heated by a heater for emitting thermoelectrons, a first grid for controlling emitted electron beams on one side of the cathodes, a second grid for attracting the thermoelectrons gathered on the cathodes on one side of the first grid, a plurality of electrodes sequentially arranged on the second grid for accelerating and focusing the incoming electron beams, and a bead glass for fixing the electrodes spaced apart by predetermined distances, in which the thickness of the second grid is varied to decrease the divergence angle of the electron beams, and horizontal slits being rotary asymmetrical portions are formed in both sides around electron beam passing holes to contrive a quadrupole effect, thereby compensating for distortion of the electron beams on the periphery of a screen caused by a deflection aberration to thus improve resolution of large-sized Brawn tubes.

Abstract: An apparatus and a method for discriminating between analog and digital video signals in a high definition VCR are disclosed.

Abstract: An array of thin film transistors, which minimizes a stepped part in a cross-over region between a gate bus line and a source bus line. Each thin film transistor in the array has associated therewith a structure which includes: a gate bus electrode located on a substrate surface, a first insulating layer covering the gate bus electrode and the substrate surface, a non-monocrystalline semiconductor layer on the first insulating layer above the gate bus electrode, a second insulating layer on the non-monocrystalline semiconductor layer above the gate bus electrode, an n+ monocrystalline layer on the second insulating layer and the non-monocrystalline layer, and a source bus electrode on the n+ monocrystalline layer. A bus line structure in the array is fabricated by the process described above. In the bus line structure, each of the non-monocrystalline semiconductor layer, the second insulating layer, and the n+ non-monocrystalline semiconductor layer is patterned in the same direction as the source bus line.

Abstract: A B-frame processing apparatus including a motion compensation apparatus in the unit of a half pixel for an image decoder adapted to a video appliance such as HDTV. According to the apparatus, motion compensation in the unit of a half pixel is performed in real time with respect to the image having been motion-compensated by frame memories, the half pixel motion-compensated image data is added by an adder to the image data provided from a restoring section, and then the added image data is provided to the frame memories for performing motion compensation in the unit of a pixel, while the order of the input image is adjusted corresponding to the display order of the final output image.

Abstract: A deck mechanism for a magnetic recording and reproducing apparatus, wherein its fixed base plate and its slide base are slidably coupled to each other without defining a space therebetween. Elements of a tape traveling system are arranged on upper and lower surfaces of the fixed base plate and the upper surface of the slide base. The upper surface of the fixed base plate is mounted with the head drum, a loading motor, a supply slant post assembly, a take-up slant post assembly, a stabilizer, pinch roller arm-driving and pressing mechanisms, a head cleaning mechanism, a capstan shaft of a capstan, all being upwardly protruded from the upper surface of the fixed base plate. The upper surface of the slide base is mounted with a supply reel table, a take-up reel table, a tension adjusting mechanism, and a brake, all being upwardly protruded from the upper surface of the slide base.

Abstract: A liquid crystal display panel provided with a protection film at the edge of each pad part for preventing cause of short circuits between pads and oblique leads of the TCP at bonding the inner leads of the TCP and the pads, including a upper and a lower substrates, a display part divided into a TFT array part formed on the lower substrate having a plurality of gate bus lines and a plurality of source bus lines, and a pixel part formed on the upper substrate and having liquid crystal injected between the upper and the lower substrates, gate pad parts positioned on the lower substrate at one side of the display part each having a plurality of pads each connected to one of the gate bus lines of the TFT array of the display part for supplying driving voltage to the gate bus lines of the TFT array successively through each pad, source pad parts positioned on the lower substrate at the upper and the lower sides of the display part each having a plurality of pads each connected to one of the source bus lines of the

Abstract: A zoom tracking apparatus and method in a video camera. An offset adjustment is achieved by deriving applied voltage of the zoom position sensor only by use of data relating to positions of the zoom lens respectively associated with several optional points and corresponding positions of the focusing lens involving focusing while shifting the zoom lens in one direction. The offset adjustment is, thereby, achieved rapidly and accurately, and an accurate focus upon zoom tracking is obtained. The minimum quantity of trace data is stored in the internal ROM of the control circuit, while a trace tracking of the focusing lens associated with the shift of the zoom lens is achieved in a region where an error may occur possibly upon detecting the position of the zoom lens by use of a focusing evaluation value, thereby capable of achieving the trace tracking accurately.

Abstract: A lift control device with a tilt sensor for controlling a lifter which moves a pickup assembly vertically, includes a light mechanism for emitting a light beam to the surface of a disk, a converting unit for converting a light beam reflected from the surface of the disk into voltage signals, a tilt detecting unit for detecting a tilt between an axis of the light beam and an axis perpendicular to the surface of the disk according to the voltage signals from the converting unit and generating a tilt monitor signal based on the detection, and a driving unit for controlling the lifter and thereby vertically moving the pickup assembly according to the tilt monitor signal.

Abstract: A system for a video cassette recorder is capable of recording/reproducing analog video and audio signals as well as digital video and audio signals for a HDTV.The revolution of a head drum may be determined different from each other depending on the selected mode, i.e., digital or analog signal recording/reproducing mode, and thus the digital signal having a different recording bandwidth from the analog signal can be recorded on and reproduced from a conventional analog tape.

Abstract: A head drum protector for a magnetic recording and reproducing apparatus, such as a slide type camera recorder. The head drum protector is preferably integrated and comprises a head drum protecting wall for protecting a rotary head drum, an opening provided at the lower section of the head drum protecting wall to receive a head base of the rotary head drum and to bring the rotary head protector into engagement with the head base. A pair of support blades extend outwardly from opposite sides of the protecting wall to enlarge the head drum protecting area of the head drum protecting wall and to support an opened tape cassette door. A sensor holder is provided at the lower front of the protecting wall to hold a LED sensor used as a tape end sensor. At a lower section between the protecting wall and the support blade, a fixing part is provided in order to mount the head drum protector on the slide base of the deck mechanism.

Abstract: A front loading device of a magnetic recording and reproducing apparatus comprises a plurality of gears gearing into each other, a worm and a worm gear. One of the plurality of gears engages with an arm gear moving a cassette holder. The worm and the worm gear engage with each other in order to reversibly rotate each other. The worm is coaxially connected to a loading motor in order to cooperate with the loading motor, and the worm gear is integrally formed with another one of the plurality of gears. The device allows a cassette along with the cassette holder to smoothly move inward along a guide opening of a bracket when the cassette is mistakenly inserted into the cassette holder and forcibly pushed such as by a child under the condition that a loading motor is applied with no electric power. Damage to the elements of the device is thereby prevented.

Abstract: An apparatus for preventing a picture fluctuation and correcting a reverse pulse in a servo system for a video cassette recorder having a still or slow motion playback function. The apparatus comprises speed and phase error detectors for detecting speed and phase errors, speed and phase controllers for controlling a speed and a phase in response to output signals from the speed and phase error detectors, mixers for mixing output signals from the speed and phase controllers, a system control circuit for controlling an operation of the servo system, the system control circuit including a correction circuit for varying widths or edges of correction signals in response to speed and phase information, and drivers for driving motors of the servo system in response to the correction signals.

Abstract: A shelf device for a refrigerator includes a bracket horizontally mounted on a back wall of a refrigerating chamber. A shelf assembly is coupled to the bracket so that a user can horizontally displace the assembly to a desired position depending upon a size of an object to be stored.

Abstract: A method for the formation of orientation film of a liquid crystal display. The method comprises the steps of forming polyvinyl-4-fluorocinnamate (hereinafter "PVCN-F") film on the surfaces of two opposite substrates and irradiating the two PVCN-F films formed with linearly polarized UV lights having different energy. The method in accordance with the present invention is capable of not only providing the pretilt angle to a fabricated LCD but also adjusting it by illuminating two substrates with linearly polarized UV beams having different energies from each other, respectively. In addition, the LCD fabricated by the method according to the present invention requires a much lower driving voltage, as compared with the conventional LCD having an orientation film of planar structure. Furthermore, phase distortion and light scattering phenomena do not occur in the LCD, so that display characteristics such as contrast and the like can be improved.

Abstract: Digest playback apparatus and method for a VCR. The digest playback apparatus includes a system controller for outputting a plurality of control signals to control the entire operation of a video cassette recorder system, the plurality of control signals including speed-change multispeed and direction data and audio multispeed change mode ON/OFF data. An analog/digital conversion circuit converts an analog audio signal read by an audio head and then restored to its original state into digital audio data regardless of a speed-change mode. A memory stores the digital audio data from the analog/digital conversion circuit.

Abstract: An apparatus for preventing illegal copying of a digital broadcasting signal, comprises a transmission section for generating a copy prevention signal to determine a display time of each field of a digital video signal on a screen, compressing the digital video signal and the copy prevention signal, modulating the compressed copy prevention signal and digital video signal into the digital broadcasting signal and transmitting the digital broadcasting signal through a transmitting antenna, and a reception section for receiving the digital broadcasting signal transmitted from the transmission section through a receiving antenna, demodulating the received digital broadcasting signal into the digital video signal, expanding the demodulated digital video signal, detecting the copy prevention signal from the expanded digital video signal, generating horizontal and vertical synchronous signals in response to the detected copy prevention signal and displaying the expanded digital video signal on the screen synchronous

Abstract: An audio/video connection apparatus for an audio/video system having a television receiver, an audio amplifier and a plurality of components. The audio/video connection apparatus includes at least one common video connection line for connecting a television receiver to a plurality of components so that video signals from the television receiver can be inputted to the plurality of components; and at least one common audio connection line for connecting an audio amplifier to the plurality of components so that audio signals from the audio amplifier can be inputted to the plurality of components, and so that video and audio signals can be inputted and outputted through the common lines to/from the components, thereby reducing the number of the output/input terminals and lines.

Abstract: An impregnation type cathode for a cathode ray tube includes a porous cathode piece having electron emission material impregnated therein. The porous cathode piece has a layer of W--Sc (or a layer of W--Sc.sub.2 O.sub.3) on its surface and a layer of alloy formed of at least two elements of a group of elements consisting of Ir, Os, Ru, and Re on the layer of W--Sc (or the layer of W--SC.sub.2 O.sub.