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: An adaptive digital video signal processing apparatus and method for Y/C separation. In the video signal processing apparatus, an adaptive 2D BPF carries out Y/C separation through comb filtering and bandpass filtering selected according to local characteristics of an image (e.g., based on the direction in which an edge in the image extends in vertical and horizontal directions. The adaptive 2D BPF performs 2D bandpass filtering in general case. The 2D BPF adaptively executes a series of selections of the various filtering operations in a continuous manner.

Abstract: Video signal processing systems and methods for detecting horizontal synchronization signals within video signals. Digital filtering methods are implemented for processing analog video signals to determine time varying characteristics of video signals to detect the starting and ending positions of horizontal synchronization pulses in a video signal with increased accuracy. In addition, adaptive methods are implemented for dynamically determining various video signal parameters over time, such as blanking level BL, threshold value (slice) level and synchronization level SL using information extracted from digitally filtered video signals.

Abstract: A flash memory system includes a memory unit including a main cell that stores main data and a parity cell that stores parity data, and an ECC receiving a codeword including the stored main data and the stored parity data, performing error correction on the codeword by executing an operation on a finite field with respect to the codeword, and an element of the finite field comprising a codeword corresponding to an erased page of the memory unit.

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 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: An apparatus and method of controlling a digital video (MPEG) player for reverse-play. The MPEG player is comprised of an I-frame buffer for storing I-pictures encoded from P-pictures by a video decoder, a B-frame buffer for storing B-pictures, and an I-frame encoder for decoding a P-picture into an I-picture. In the MPEG player, a picture group being played at present is decoded for reverse play and a previous picture group is decoded for preparation of the reverse-play. Reverse-play in soft 1-times (×1) by means of a frame memory of small capacity is achieved irrespective of the picture number and classes in picture groups.

Abstract: Provided are an arbiter capable of improving memory access efficiency in a multi-bank memory, a memory access arbitration system including the arbiter, and an arbitration method thereof, where the arbiter detects requests that are not included in a busy bank, and allows the requests corresponding to a bank receiving the largest number of pending requests priorities; and write request information generated by masters is stored in a predetermined buffer to be output as additional master request information, and provides the corresponding master with an opportunity to generate new request information.

Abstract: Apparatus and method for dispatching a very long instruction word (VLIW) instruction having a variable length are provided. The apparatus for dispatching a VLIW instruction includes a packet buffer for storing at least one or more VLIW instructions, and a decoding unit configured to constitute a VLIW instruction to be currently executed among the VLIW instructions stored in the packet buffer and decode predetermined bits of each sub-instruction contained in the VLIW instruction. The apparatus dispatches a corresponding sub-instruction to an FU which corresponds to each sub-instruction, based on the results of decoding performed in the decoding unit, position information on the sub-instructions that are placed on the packet buffer, and position information on the sub-instructions that are placed in the current VLIW instruction. Sub-instructions can be effectively dispatched to corresponding FUs using simple decoding logic even in a case where the length of the VLIW instruction is not fixed.

Abstract: The disclosure is a data processing device with selective data cache architecture and a computer system including the data processing device. The data processing device is comprised of a microprocessor, a coprocessor, a microprocessor data cache, an X-data cache, and a Y-data cache. The microprocessor fetches and executes instructions, and the coprocessor carries out digital signal processing functions. The microprocessor data cache stores data provided from the microprocessor. The X-data cache stores a first group of data provided from the coprocessor while the Y-data cache stores a second group of data provided from the coprocessor.

Abstract: An adaptive quantization controller and methods thereof are provided. In an example method, motion prediction may be performed on at least one frame included in an input frame based on a reference frame. A prediction error may be generated as a difference value between the input frame and the reference frame. An activity value may be computed based on a received macroblock, the received macroblock associated with one of the input frame and the prediction error. A quantization parameter may be generated by multiplying a reference quantization parameter by a normalization value of the computed activity value. In another example method, an input frame including an I frame may be received and motion prediction for the I frame may be performed based at least in part on information extracted from one or more previous input frames. In a further example, the adaptive quantization controller may perform the above-described example methods.

Abstract: A computer system embedding buffers therein for performing a digital signal processing (DSP) data access operation includes a DSP core,a data cache, first and second buffer modules, an external memory and a central processing unit (CPU) core. The CPU core executes instructions and the DSP core processes data in accordance with the instructions. The data cache stores temporary data associated with the DSP core. The first buffer module stores input data received by the DSP core while the second buffer module stores output data provided from the DSP core. The external memory stores the temporary data, the input data, and the output data, wherein the input and output data are received by and provided from the DSP core in series through the first and second buffer modules without going through the data cache.

Abstract: A hierarchical motion estimator and a motion vector generating method for compressing image data, having both a high frequency component and a low frequency component, rapidly and correctly compress the image data without increasing memory requirements. The motion estimator includes a first data processing block, a second data processing block and a motion estimation block. The motion vector generating method generates current image hierarchical data, generates reference image hierarchical data and then generates a motion vector based on high-frequency current image hierarchical data, low-frequency current image hierarchical data, high-frequency reference image hierarchical data and low-frequency reference image hierarchical data.

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 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.