Abstract: A digital processing system and method for tracking a subcarrier included in a video signal are provided, where a phase comparator tracks the phase of a color burst signal based on predetermined supposed phases, Y/C separation and demodulation are carried out based on a compensation phase that is updated by a phase compensator in response to the tracked phase, and the Y/C separation and demodulation are performed based on a compensation frequency determined by a frequency compensator by checking short-term and long-term variations in the updated compensation phase.

Abstract: A circuit for reducing cross-color artifacts in video data can include three luminance/chrominance (Y/C) separator circuits each configured to provide sets of chrominance coordinates based on a respective three contiguous composite video frames. A first circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the first, second and third contiguous composite video frames. A second circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the second and third contiguous composite video frames and a fourth contiguous composite video frame. Related methods and computer program products are also disclosed.

Abstract: A digital video signal processing apparatus and method for adaptive spatio-temporal Y/C separation in multiple directions. In the digital video signal processing apparatus, an adaptive three-dimensional band pass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering when the edge direction is fixed vertically/horizontally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically, the 3D BPF performs 2D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering and 2D band pass filtering according to the spatio-temporal local characteristics of the image.

Abstract: A digital video signal processing apparatus and method for field-based adaptive Y/C separation includes an adaptive 3D BPF performing Y/C separation according to local comb filtering/1D band pass filtering when the edge direction is fixed vertically/horizontally in response to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally or vertically, the 3D BPF performs 2D/3D band pass filtering in all directions. The 3D BPF adaptively and continuously carries out comb filtering, 1D band pass filtering and 2D/3D band pass filtering in response to the spatio-temporal local characteristics of the image.

Abstract: A disc cartridge is provided. The disc cartridge includes: a lower housing having a window for allowing a recorder or reader to access to a read-out surface of a disc; and an upper housing coupled to the lower housing to ejectably receive the disc between the lower housing and the upper housing, and having at least a portion rotatable up and down with respect to one side of the lower housing until the disc can be ejected.

Abstract: A digital video signal processing apparatus and method for frame-based adaptive spatio-temporal Y/C separation. In the digital video signal processing apparatus, an adaptive three-dimensional bandpass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering/frame comb filtering when the edge direction is fixed vertically/horizontally/temporally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically/temporally, the 3D BPF performs 2D or 3D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering, frame comb filtering and 2D/3D band pass filtering according to the spatio-temporal local characteristic of the image.

Abstract: A digital video signal processing apparatus and method for detecting data in a vertical blanking interval (VBI) includes a re-sampler generating, from input video data, first re-sample data at a VBI data rate and second re-sample data with a data rate twice as high as the VBI data rate, a signal tracking unit tracking an existence of a clock run-in and a phase of the clock run-in from the second re-sample data and calculating an average of the clock run-in, and a slicer determining a logical value of the first re-sample data according to the average of the clock run-in and outputting the determined logical value as VBI data, wherein the re-sampler determines a compensation phase from the tracked phase of the clock run-in, re-samples the input video data according to the compensation phase with the VBI data rate and generates the first re-sample data.

Abstract: A method and apparatus for recording/reproducing data is disclosed. The apparatus for recording/reproducing data comprises a diffraction element splitting light diffracted or reflected from a recording medium into a main beam and first and second sub beams, the main beam and the first and second sub beams having no interference from one another; a light-receiving part detecting the main beam and the first and second sub beams; and a controller controlling a position of the diffraction element based on at least one light capacity of the detected beams or the detected position.

Abstract: The present invention provides a disc cartridge assembly, by which loading/unloading of a disc is facilitated to enable both one use in a cartridge state and the other a use as a single disc entity. The present invention includes a lower case having a window for a drive access, an upper case provided onto the lower case, the upper case having an exposure window provided to a central part to expose a label face of a disc, a rotating ring rotatably provided within the upper and lower cases to receive an outer circumference of the disc, at least one shutter provided within the upper and lower cases to open/close the window by interoperating with a rotation of the rotating ring, and a rotating means for rotating the rotating ring by interoperating with an external device.

Abstract: A video signal processing apparatus may include a frame memory and a separator and deinterlacer circuit. The frame memory may store an interlaced video signal. The separator and deinterlacer circuit may execute operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The apparatus may output a sequential video signal. A data processing system may include the video signal processing apparatus. A method for processing video signals may include storing an interlaced video signal in a frame memory and executing operations of separating and deinterlacing the interlaced video signal stored in the frame memory. The method may also include outputting a sequential video signal.

Abstract: For spatial resolution conversion of an image signal, a magnitude of a motion vector is compared to a threshold value. Single channel interpolation is performed if the magnitude of the motion vector is greater than a threshold value, and multi-channel interpolation is performed otherwise. In addition, single channel interpolation is performed for spatial resolution conversion of any frame that does not refer to another frame.

Abstract: A video decoder removes noise caused by a luminance signal component when separating a chrominance signal from a composite video baseband signal.

Abstract: A synchronization detector of a video signal processor includes a line buffer, a parameter extraction unit and synchronization detection unit. The line buffer sequentially stores a digital video signal corresponding to an input analog video signal, line by line of the input analog video signal. The parameter extraction unit continuously extracts horizontal synchronization parameters from the digital video signal stored line by line and continuously extracts vertical synchronization parameters from a portion of the digital video signal stored line by line. The synchronization detection unit generates horizontal and vertical synchronization signals of the input analog video signal using time information related to local minimum values of the horizontal synchronization parameters and time information related to local minimum values of the vertical synchronization parameters.

Abstract: A synchronization detecting apparatus includes a counter, an error detector, and a line length generator. The counter counts to a predetermined counter value in response to a clock signal. The error detector generates an error, which is the difference between a current counter value received from the counter and a previous line length, in response to a synchronization flag signal. The line length generator generates a current line length based on a compensated error and the predetermined counter value. The synchronization flag signal has an active level at a transitioning edge of a synchronization pulse signal contained in an input signal.

Abstract: A digital video signal processing apparatus and method for adaptive spatio-temporal Y/C separation in multiple directions. In the digital video signal processing apparatus, an adaptive three-dimensional band pass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering when the edge direction is fixed vertically/horizontally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically, the 3D BPF performs 2D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering and 2D band pass filtering according to the spatio-temporal local characteristics of the image.

Abstract: A circuit for reducing cross-color artifacts in video data can include three luminance/chrominance (Y/C) separator circuits each configured to provide sets of chrominance coordinates based on a respective three contiguous composite video frames. A first circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the first, second and third contiguous composite video frames. A second circumcircle calculator circuit is coupled to the three Y/C separator circuits and is configured to provide a circumcircle for a set of chrominance coordinates corresponding to the second and third contiguous composite video frames and a fourth contiguous composite video frame. Related methods and computer program products are also disclosed.

Abstract: A digital video signal processing apparatus and method for compensating a chrominance (C) signal includes receiving the C signal separated from an input video signal and compensating the C signal in at least one dimension thereof to generate a compensated C signal. A comparator may determine whether a portion of a Y signal in the input video signal is present in the C signal. The compensator may compensate the C signal only when the comparator determines a portion of the Y signal is present in the C signal. The comparator may calculate a variation between current C data of the input video signal and adjacent C data and compare the variation to a threshold value.

Abstract: A digital video signal processing apparatus and method for field-based adaptive Y/C separation includes an adaptive 3D BPF performing Y/C separation according to local comb filtering/1D band pass filtering when the edge direction is fixed vertically/horizontally in response to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally or vertically, the 3D BPF performs 2D/3D band pass filtering in all directions. The 3D BPF adaptively and continuously carries out comb filtering, 1D band pass filtering and 2D/3D band pass filtering in response to the spatio-temporal local characteristics of the image.

Abstract: A digital video signal processing apparatus and method for frame-based adaptive spatio-temporal Y/C separation. In the digital video signal processing apparatus, an adaptive three-dimensional bandpass filter (3D BPF) performs Y/C separation using local comb filtering/1D band pass filtering/frame comb filtering when the edge direction is fixed vertically/horizontally/temporally according to spatio-temporal local characteristics of an image using spatio-temporal filters. When the edge direction is not fixed horizontally/vertically/temporally, the 3D BPF performs 2D or 3D band pass filtering in all directions. Thus, the 3D BPF continuously carries out comb filtering, 1D band pass filtering, frame comb filtering and 2D/3D band pass filtering according to the spatio-temporal local characteristic of the image.

Abstract: A digital video signal processing apparatus and method for detecting data in a vertical blanking interval (VBI) includes a re-sampler generating, from input video data, first re-sample data at a VBI data rate and second re-sample data with a data rate twice as high as the VBI data rate, a signal tracking unit tracking an existence of a clock run-in and a phase of the clock run-in from the second re-sample data and calculating an average of the clock run-in, and a slicer determining a logical value of the first re-sample data according to the average of the clock run-in and outputting the determined logical value as VBI data, wherein the re-sampler determines a compensation phase from the tracked phase of the clock run-in, re-samples the input video data according to the compensation phase with the VBI data rate and generates the first re-sample data.