Patent application number | Description | Published |
20100213990 | HIGH FREQUENCY POWER SWITCHING CIRCUIT WITH ADJUSTABLE DRIVE CURRENT - A MOSFET pre-driver circuit with highly adjustable drive current for a high frequency switching power MOSFET circuit decreases the peak of the drive current and power loss of the pre-driver while maintaining power loss of the power stage so that total power loss is decreased and circuit efficiency is increased. A resistor arranged in series with a source of the MOSFET of the pre-driver circuit is provided to adjust the drive current. | 08-26-2010 |
20110090955 | Predictive Adaptive Scan Ordering for Video Coding - An apparatus comprising an inter-prediction motion compensation unit, a transform unit coupled to the inter-prediction motion compensation unit, a quantization unit coupled to the transform unit such that the transform unit is positioned between the inter-prediction motion compensation unit and the quantization unit, a scanning unit coupled to the quantization unit such that the quantization unit is positioned between the transform unit and the scanning unit, and an adaptive scan order predictor unit coupled to the inter-prediction motion compensation unit, the quantization unit, and the scanning unit. An apparatus comprising an entropy decoding unit, an inverse scanning unit coupled to the entropy decoding unit, an inverse quantization unit coupled to the inverse scanning unit such that the inverse scanning unit is positioned between the entropy coding unit and the inverse quantization unit, and an adaptive scan order predictor unit coupled to the entropy decoding unit and the inverse scanning unit. | 04-21-2011 |
20120170859 | METHOD AND APPARATUS FOR REALIZING ADAPTIVE QUANTIZATION IN PROCESS OF IMAGE CODING - A method and apparatus for realizing adaptive quantization in the process of image/video coding, which includes the following steps: acquiring the parameter information of the neighbor blocks of the current block; determining the quantization mode of the current block according to the parameter information of the neighbor blocks; and performing quantization processing on transform coefficients of the current block by using the determined quantization mode. Wherein, block coding type and motion vector of the neighbor blocks are used as the parameter information for determining the quantization mode of the current block. An apparatus for adaptive quantization in process of image/video coding is provided. The invention can use different quantization mode for adaptive quantization in different image content of an image sequence, thereby improving the subjective quality of the compressed images at the same bit rate. | 07-05-2012 |
20130177075 | Weighted Prediction Method and Apparatus in Quantization Matrix Coding - A method for decoding and reconstructing a QM associated with a picture, wherein the method comprises acquiring at least one reference QM and at least one weighting factor associated with the reference QM, wherein the reference QM is a previously decoded QM, and computing a predicted matrix using the reference QM and the weighting factor associated with the reference QM, wherein the predicted matrix is used to reconstruct the QM. In another embodiment, a method for encoding a QM associated with a picture, wherein the method comprises acquiring a first QM reference and a second QM reference, acquiring a first weighting factor that corresponds to the first QM reference and a second weighting factor that corresponds to the second QM reference, obtaining the predicted QM using the first QM reference, the second QM reference, the first weighting factor, and the second weighting factor. | 07-11-2013 |
20130188702 | Simplification of Mode Dependent Intra Smoothing - An apparatus comprising a processor configured to determine whether to apply an intra smoothing filter for a prediction unit (PU) based on a lookup table (LUT), wherein the LUT comprises data indicating the intra smoothing filter should not be applied for any PU with a block size of 8×8 pixels and associated with directional prediction mode. The disclosure also includes a method comprising generating reference samples, determining a size of a PU block, and selecting the reference samples based on PU block size, wherein filtered reference samples are not selected for PU blocks with a size of 8×8 pixels and associated with directional prediction mode. | 07-25-2013 |
20130188703 | Reference Pixel Reduction for Intra LM Prediction - A video codec comprising a processor configured to generate a prediction block for a chroma block, wherein the prediction block comprises a predicted chroma sample, wherein the predicted chroma sample is based on a filtered reconstructed luma sample located in a corresponding reconstructed luma block, a plurality of downsampled filtered reconstructed luma samples located in positions neighboring the corresponding reconstructed luma block, and a plurality of downsampled chroma samples located in positions neighboring the chroma block. | 07-25-2013 |
20130272391 | Method and Apparatus of Quantization Matrix Coding - A method of coding a quantization matrix (QM) comprising non-uniformly downsampling the QM to generate a plurality of downsampled quantization coefficients. Also, an apparatus used in video encoding comprising a processor configured to non-uniformly downsample a QM to generate a plurality of downsampled quantization coefficients, scan the downsampled quantization coefficients, and encode the downsampled quantization coefficients based on scanning the downsampled quantization coefficients to generate encoded coefficients, and a transmitter coupled to the processor and configured to transmit a bitstream comprising a picture parameter set containing the encoded coefficients. | 10-17-2013 |
20140086313 | METHOD AND APPARATUS FOR REALIZING ADAPTIVE QUANTIZATION IN PROCESS OF IMAGE CODING - A method for realizing adaptive quantization in image encoding and dequantization in image decoding is disclosed. In the adaptive quantization method, an image to be encoded is divided into one or more blocks, and each block is transformed to obtain one or more transform coefficients, the method comprising: acquiring parameter information of neighbor blocks of a current block; determining a quantization mode for the current block according to the parameter information of the neighbor blocks; and quantizing transform coefficients of the current block in the determined quantization mode. The quantization mode includes at least one of quantization matrix, quantization parameter and quantization step. | 03-27-2014 |
20140112593 | METHOD AND APPARATUS FOR OBTAINING SIZE OF TRANSFORM BLOCK - The present disclosure provides a method for obtaining a size of a transform block, where the method includes: obtaining a dividing manner of an image block; and obtaining size information of a post-dividing transform block according to the dividing manner of the image block and a width and a height of a pre-dividing transform block. By using the method for obtaining a size of a transform block provided in this embodiment of the present disclosure, a size of a transform block may be coded according to a dividing manner of an image block or a height and a width of a pre-dividing transform block, thereby effectively improving coding efficiency. | 04-24-2014 |
20140198179 | METHOD AND APPARATUS OF DEPTH PREDICTION MODE SELECTION - There is disclosed a method, apparatus and computer program product for prediction mode selection for coding a block of a depth map. An ordered list of coding modes is obtained, wherein the ordered list of coding modes comprises a plurality of coding modes each of which is capable of being used for coding of the block. A plurality of depth modeling modes (DMMs) each of which is capable of being used for coding of the block are obtained. And whether a DMM of the plurality of DMMs is to be added into the ordered list of coding modes in accordance with a decision condition is determined. | 07-17-2014 |
20140241427 | METHOD AND APPARATUS FOR CODING MATRIX AND METHOD AND APPARATUS FOR DECODING MATRIX - The present disclosure provides a method and an apparatus for coding or decoding a matrix, includes: dividing a matrix into layers according to a preset quantity of divided layers, and grouping matrix elements into different layers; performing, according to a determined layer number of a highest layer to be coded and in an order of layers one by one, coding processing on matrix elements at each layer to be coded; for a layer having a layer number less than or equal to the layer number of the highest layer to be coded, writing residual data between an original matrix element value corresponding to the layer and a corresponding matrix element predicted value into a bit stream; for a layer having a layer number greater than the layer number of the highest layer to be coded, writing no coded data of the layer into the bit stream. | 08-28-2014 |
20140307787 | METHOD AND APPARATUS OF DEPTH PREDICTION MODE SELECTION - There is disclosed a method, apparatus and computer program product for prediction mode selection for coding a block of a depth map. An ordered list of coding modes is obtained, wherein the ordered list of coding modes comprises a plurality of coding modes. And whether a depth modeling mode and/or a region boundary chain mode is to be added into the ordered list of coding modes in accordance with a decision condition is determined. | 10-16-2014 |
20150049807 | Method And Apparatus Of Derivation For A Binary Partition Pattern - There is disclosed a method, device and computer-readable storage medium for decoding video data. The method includes: obtaining a reference sample array of a video block; obtaining a sum of the reference sample array; calculating a threshold by performing arithmetic right shift to the sum, a shift value of the arithmetic right shift being determined according to size information of the video block; and determining the binary partition pattern by comparing the reference sample array with the threshold. | 02-19-2015 |