Abstract: A character editing system for a VCR, comprising a control circuit for performing on-screen display control and recording control operations for character data in a character editing mode; a character recording circuit for encoding character data, demodulating the encoded data and recording the demodulated data on a selected one of stereo audio tracks of a video tape under a control of the control circuit; an audio reproducing circuit for detecting audio signals and character data from the audio tracks and outputting the detected audio signals to speakers; a video reproducing circuit for detecting video signals from a video track of the video tape and demodulating the detected video signals; and a character output circuit for outputting the character data which is to be recorded or the character data which is reproduced by the audio reproducing circuit, placing the data on the reproduced video signal from the video reproducing circuit, under a control of the control circuit.

Abstract: A sample rate conversion device for processing a non-standard television signal converts a sample rate of an output signal component of a color decoder that uses a BL (Burst Locked) clock, which is applied to a memory application part that uses a LL (Line Locked) clock, for a digital television system, such as an IDTV (Improved Definition Television) system, to prevent the degradation of picture quality which may develop when digital processing a non-standard TV signal. The conversion is done by repeating the signal component processed according to the BL clock every time the LL clock is ahead of the BL clock by one clock cycle in the situation when the LL clock is faster than the BL. When the LL clock is slower than the BL clock, the converter skips the signal component processed according to the BL clock every time the LL clock is behind the BL clock by one clock cycle.

Abstract: An apparatus and a method for separating luminance and color signals from an input video signal.

Abstract: A method and apparatus is provided for increasing scanning line numbers for TV video signal utilizing a three dimensional medial filter. The method and apparatus inhibit the picture quality from being deteriorated due to a vertical resolution decreasing, shimmering and step edge phenomenon and the like occurring at the intra-field interpolation system, inter-field interpolation system and motion adaptive interpolation system which are conventional scanning line number increasing systems that increase TV scanning line number.

Abstract: Motion detection and motion estimation apparatus and method thereof. Motion detection becomes correct by taking horizontal/vertical changes of the incoming image into account. Also, motion direction and motion magnitude are detected and motion estimation can be made. The apparatus uses horizontal/vertical difference signals as certain critical values for motion detection judgement, detects left/right motion in the horizontal direction and up/down motion in the vertical direction by performing the exclusive-OR of horizontal/vertical difference signals and frame difference signals, and makes horizontal/vertical motion estimation possible by using a ratio of horizontal/vertical signal sums and frame difference signal sums with respect to a K.times.3 window.

Abstract: An interpolating component generator for a scanning line interpolator using pseudo median filters wherein in generating an interpolating component signal required for converting an image signal of the interlaced scanning system into an image signal of the progressive scanning system, a determination is made whether an inter-field variation is larger than an intra-field variation, based on a determination signal from an inter-field/intra-field determination processor so that an intra-field pseudo median filter is used when the inter-field variation is larger than the intra-field variation, whereas an inter-field pseudo median filter is used when the intra-field variation is larger than the inter-field variation, so as to calculate a pixel value to be finally used in interpolation, thereby solving problems such as a step edge phenomenon and a reduced vertical resolution encountered in fixed intra-field or inter-field interpolation systems, an overlap phenomenon occurring in median filters, arid an increase in c

Abstract: An apparatus and a method for enhancing a transient edge of a video signal.

Abstract: A quadrature modulated luminance/color signal separating device applied in a color television receiver. The most suitable luminance/color signal separation is performed by determining sizes of interference components in gross, fine, and superfine structures, thereby solving cross-color, cross-luminance and deterioration of resolution generated in fixed luminance/color signal separation. According to the present device, a control signal properly corresponding to a composite video signal can be generated using a control signal generated in a spectrum distribution adaptive system, and consistency of control signal can be kept by introducing a concept of IIR filter into the control signal. Also, luminance/color signal separation suitable for human visual characteristic can be done, and the luminance/color separating function in a 2-dimensional region can be improved by interference elimination function.

Abstract: A video signal transient edge enhancing device and method which can clearly display an image by properly enhancing transient edges of video signals having different frequency bands according to the respective frequency bands. The device of the present invention comprises a plurality of transient edge enhancers for enhancing transient edges by respective proper bandwidths with respect to a plurality of input video signals having different frequency bands, and an enhancer selector for selecting one enhancer among the transient edge enhancers according to a selection control signal determined according to bands of the input video signals and outputting a video signal enhanced by the selected enhancer.

Abstract: The present invention relates to a scanning line converting method of television receiver for interpolating the scanning line by processing with two dimensional pseudomedian filtering, and which comprises : a step for setting a center value by peripheral pixel components of the pixels to be interpolated in a video signal of interlaced scanning system; a step for computing with a two dimentional pseudomedian filtering by center value and peripheral pixel components; a step for 2/1 time compressing respectively the computed signal and the video signal; and a step for selectively switching the 2/1 time compressed signals whereby interpolating the scanning line.

Abstract: An apparatus and a method for enhancing a transient edge of a video signal.

Abstract: An apparatus and a method for enhancing a transient edge of a video signal.

Abstract: A television screen aspect ratio converting method and the device thereof which is suitable to display a video signal having a 4:3 screen aspect ratio on a screen having a 16:9 aspect ratio. According to the present invention, scanning lines amounting to 30 lines or less having unimportant information are removed in a vertical direction from an input video signal having a 4:3 screen aspect ratio, vertical interpolation is performed for the removed scanning lines, and then 4/5 time-compression in a horizontal direction is performed, so that the video signal is displayed on a screen having a 16:9 aspect ratio. Accordingly, picture loss in a vertical direction is minimized and the screen expansion in a horizontal direction is within a range such that a general televiewer cannot perceive a variation of image, so that integrity of image to be displayed after the conversion of screen aspect ratio can be maintained as is.

Abstract: An apparatus for separating luminance and color signals from a composite video signal, which is capable of suppressing a cross luminance phenomenon of the luminance signal and a cross color phenomenon of the color signal. The apparatus comprises a first color signal detecting circuit for detecting a first color signal from the composite video signal, the first color signal suppressing a cross luminance phenomenon of the luminance signal from the composite video signal, and a second color signal detecting circuit for detecting a second color signal from the composite video signal, the second color signal suppressing a cross color phenomenon of the color signal from the composite video signal. The first color signal is selected when the color signal of the composite video signal has a large amplitude and no diagonal variation. The second color signal is selected when the color signal of the composite video signal has a small amplitude and the diagonal variation.

Abstract: A luminance/color signal separation apparatus comprising an analog/digital converter for converting a composite video signal inputted therein into a digital composite video signal, an adjacent signal detection circuit for detecting from the composite video signal from the analog/digital converter a target composite video signal from which luminance and color signals are to be separated and vertically and horizontally composite video signals, two-dimensional, horizontal and vertical pseudo median filtering circuits for outputting first to third luminance signals, respectively, a control signal generation circuit for generating horizontal and vertical control signals, a luminance signal selection circuit for selecting one of the first to third luminance signals in response to the horizontal and vertical control signals and outputting the selected luminance signal as the final luminance signal, a delay unit for delaying the target composite video signal by a predetermined time period for a timing matching with t

Abstract: A composite video signal is separated into a luminance signal and a color signal according to spectrum distributions thereof.

Abstract: A microwave oven includes a cooking chamber having a door. A tray is mounted in the chamber by a roller/guide track arrangement such that gravitational force acting on the tray is converted into a force which slides the tray forwardly when the door is opened.

Abstract: An apparatus for interpolating scanning lines of a TV signal in a TV, comprising a scanning line interpolator for discriminating vertical, horizontal and diagonal edge patterns of a received video signal of the TV signal and extracting a signal for interpolation from the video signal using vertical, 45.degree. end 135.degree. diagonal average values, a first time compressor for compressing the time of the interpolation signal from the scanning line interpolator, a second time compressor for compressing the time of the video signal, and a switch for selectively and in turn outputting output signals from the first and second time compressors.

Abstract: An apparatus for fixing rotary heads to an upper drum of a rotary drum of a video cassette recorder includes a guide projection formed on a lower surface of each of the rotary heads, guide grooves formed in the upper drum for engagement with the guide projections of the rotary heads, and setting means for fixing the rotary heads engaged with the guide grooves of the upper drum to the upper drum. The apparatus enables the rotary heads to be mounted on the upper drum simply, accurately, and at constant angular intervals.

Abstract: A tape recording system for use in a video cassette tape recorder capable of recording a reproducing signal of a video tape to another video tape by directly interfacing the reproducing high frequency signal without reproducing signal processing and recording signal processing, which includes a reproducing signal switching unit for buffering and outputting a high-frequency reproducing signal without a demodulation processing, a recording signal switching unit for controlling the level of a video signal into a proper recording current corresponding to the characteristic of video head without a modulation processing so as to directly switch the video signal to a recording section, and a level displaying unit for comparing the recording signal of the recording signal switching unit and a reference frequency.