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| Number | Title | Issue Date |
| 7426315 | Method for reducing blocking artifacts A method for removing blocking artifacts from moving and still pictures, comprising classifying horizontal and vertical boundaries in each picture as blocky or non-blocky; for each blocky boundary, defining an adaptive, picture content-dependent, one-dimensional fil... | 09/16/2008 |
| 7379609 | Image processing apparatus and method for conversion between raster and block formats An image processing apparatus for converting image data between a raster format and a block format including an image data processor for providing the image data including a luminance component and at least one chrominance component in the raster format, at least tw... | 05/27/2008 |
| 7376280 | Video encoding and decoding A method for encoding video with a two-dimensional (2D) transform separable to two one-dimensional (1D) transforms. The method receives an array of values for a sub-section of an image, performs a first 1D-transform of the array, transposes the resulting array, and ... | 05/20/2008 |
| 7330595 | System and method for video data compression A system and method perform video data compression in a manner that limits the need for external memory access. Accordingly, the operational frequency of the local data bus is reduced and power consumption is therefore minimized. In this manner, the present inventio... | 02/12/2008 |
| 7292634 | Image coding method and apparatus A motion detection block includes a wavelet transform section which receives a current image I1 and a reference image I2 as inputs. The motion detection section detects a motion vector using size-reduced images RI1 and RI2 generated by tr... | 11/06/2007 |
| 7292730 | Two-dimensional inverse discrete cosine transforming Implementing a two-dimensional inverse discrete cosine transform function includes executing two one-dimensional inverse discrete cosine transforming functions. Each of the one-dimensional functions is controlled to operate on a matrix of coefficients in either of t... | 11/06/2007 |
| 7170940 | Moving picture encoding system A moving picture encoding system capable of bit rate control, by which moving pictures are encoded while maintaining high quality even when there are substantial changes in the size of objects and the characteristics of texture is provided. A predictive area calcula... | 01/30/2007 |
| 7092118 | Progressive image transmission using discrete wavelet transforms Disclosed herein is a method of storing and of progressively transferring a still image so that it can be conveniently previewed during the transfer and so that a user can terminate the transfer at an early stage if the image turns out to be undesirable. The methods... | 08/15/2006 |
| 7082210 | Moving object detector and image monitoring system A coded stream analyzer (102) variable-length decodes an incoming coded stream and extracts encoding parameters for each macroblock, such as an encoding mode, DCT coefficient values, the amount of codes of DCT coefficients, the amount of codes of each macrobl... | 07/25/2006 |
| 7027058 | Host device, image display device, image display system, image display method, panel attribute reading-out method and image display control method To make it possible to execute the same application regardless of the number of connected panels even in a multi-panel environment. A host system, which transfers an image signal to a plurality of panels connected thereto, comprises: a panel ID recognition section f... | 04/11/2006 |
| 6999514 | Motion compensation with subblock scanning According to an example embodiment, the present invention is directed to pixel-data processing that includes scanning a first 2×2 line in each of a series of immediately adjacent pixel blocks, prior to scanning a second 2×2 line in each of the series of pixel bloc... | 02/14/2006 |
| 6996176 | Motion estimation process and system using sparse search block-matching and integral protection Methods and systems for obtaining a motion vector between two frames of video image data are disclosed. Specifically, methods and systems of the present invention may be used to perform a block-matching algorithm over a two-dimensional search area in a manner that r... | 02/07/2006 |
| 6977961 | Method and apparatus for macroblock DC and AC coefficient prediction for video coding Existing video data compression algorithms exploit the fact that the DCT coefficients in the neighbouring blocks are sometimes similar to those in the current block. This means that if the blocks contain completely different coefficients, for coding video data is di... | 12/20/2005 |
| 6963608 | Method and apparatus for providing rate control in a video encoder A method and apparatus are provided for controlling the quantization level in a digital video encoder that comprises a plurality of parallel compression engines (12). The input picture is partitioned into a number of panels (10) and each panel is proce... | 11/08/2005 |
| 6961084 | Programmable image transform processor A programmable image transform system has a programmable addressing and arithmetic blocks. In the programmable addressing block, an input address generator has an input addressing microsequencer and an input addressing memory that stores an input addressing procedur... | 11/01/2005 |
| 6947060 | Image forming apparatus, electron beam apparatus, modulation circuit, and image-forming apparatus driving method An image forming apparatus which performs pulsewidth modulation with a pulsewidth set by counting a clock. Especially, for grayscale level correction by setting the frequency of the clock, the periodic clock is counted, and an output pattern is changed in accordance... | 09/20/2005 |
| 6937659 | Apparatus and method for compressing video information A method and apparatus is disclosed for efficiently encoding data representing a video image, thereby reducing the amount of data that must be transferred to a decoder. The method includes transforming data sets utilizing a tensor product wavelet transform which is ... | 08/30/2005 |
| 6925119 | Process and system for the compression of digital video signals, a system and a computer program product therefor A process for encoding digital video signals organized in frames comprises the operations of dividing the frames into blocks starting from macroblocks subjected to motion-compensation and applying to the blocks a discrete cosine transform in such a way as to generat... | 08/02/2005 |
| 6920177 | Method and apparatus for accomplishing multiple description coding for video A method and apparatus for utilizing temporal prediction and motion compensated prediction to accomplish multiple description video coding is disclosed. An encoder receives a sequence of video frames and divides each frame into non-overlapping macroblocks. Each macr... | 07/19/2005 |
| 6904175 | Image compression using an interger reversible wavelet transform with a property of precision preservation A wavelet-based image compression system and method are presented. Compression is accomplished by performing a wavelet transformation of an input digital image. The resulting wavelet coefficients are compared to a threshold value. Coefficients falling below the thre... | 06/07/2005 |
| 6888564 | Method and system for estimating sharpness metrics based on local edge kurtosis The present invention relates to a method and system for evaluating the quality of video data without gaining access to the source data. The system is configured to estimate sharpness metrics by detecting edge pixels and enclosing them with 8×8 pixel blocks. For ea... | 05/03/2005 |
| 6870885 | Apparatus and method for decoding and computing a discrete cosine transform using a butterfly processor An apparatus to determine a transform of a block of encoded data the block of encoded data comprising a plurality of data elements. An input register is configured to receive a predetermined quantity of data elements. At least one butterfly processor is coupled to t... | 03/22/2005 |
| 6862278 | System and method using a packetized encoded bitstream for parallel compression and decompression A system and method are disclosed for parallel compression and decompression of a bitstream. For compression, the bitstream is separated into a plurality of components, and the components are encoded using a compression algorithm. Packets are then constructed from t... | 03/01/2005 |
| 6847686 | Video encoding device Video encoding device including a video input processor, for receiving said video signal, a global controller, for controlling the global operation of the video encoding device, a motion estimation processor, a digital signal processor and a bit-stream processor, wh... | 01/25/2005 |
| 6804457 | Digital video signal recorder/reproducer and transmitter When recording/reproducing a digital video signal having 1080 effective lines, an MPEG stream can be extracted on the reproducing side with a simple structure and without causing serious deterioration of the image quality, and without wastefully consuming the capaci... | 10/12/2004 |
| 6788811 | Coding apparatus, decoding apparatus, coding method, decoding method, amd computer-readable recording medium for executing the methods A coding apparatus which can simplify a coding circuit and also simplify the processing of quantization. Image data that consists of R-, G-, and B-color components read from a scanner into buffers is subjected to transformation using a position correlation for each ... | 09/07/2004 |
| 6724939 | Low complexity JPEG decoder A decoder includes an indexing and thresholding stage that receives a compressed image matrix and produces therefrom a signal that is based on a comparison of at least one element in the compressed image matrix with a predetermined threshold value. A transform stage... | 04/20/2004 |
| 6628839 | Image coding system converting apparatus, image coding system converting method, and recording medium An image coding system converting apparatus is arranged by employing input means 102 for sequentially reading an input bit stream, a decoder unit 103 for decoding inputted data, a data buffer 104 for saving either non-compression image data or image data ... | 09/30/2003 |
| 6611274 | System method, and computer program product for compositing true colors and intensity-maped colors into a frame buffer The color of a pixel is represented in a pixel storage word, wherein color coordinate data and intensity data are coded separately in two fields of the pixel storage word, the color field and the intensity field. This permits a range of colors to be repre... | 08/26/2003 |
| 6597394 | Programmable image transform processor for digital image processing A programmable image transform processor has a programmable addressing and arithmetic blocks. In the programmable addressing block, an input address generator has an input addressing microsequencer and an input addressing memory that stores an input addre... | 07/22/2003 |
| 6567117 | Method for regulating image quality, picture communication equipment using same and recording medium having recorded therein a program for executing the method In a regulation of a total image quality for an encoded picture, parameter conversion data which define applicable coding bit rates and coding frame rates for each image format are previously stored in a storage 13. An image quality regulating parameter i... | 05/20/2003 |
| 6535646 | Discrete cosine transform method and apparatus A linear transform apparatus for implementing a linear transform on input data values to produce linear transformed output data, the apparatus comprising: input means for inputting input data values one after another to each of a series of multiplication ... | 03/18/2003 |
| 6480664 | Trick mode VTR which generates trick play data from a stream of images containing intra-pictures and predictive pictures and selects specific DCT coefficients for intra-pictures Tape formatting, tracking and trick mode data generation are disclosed for providing trick modes for compressed video stored on a video tape. The tape is formatted so that trick mode data is recorded at normal speed within certain areas delineated by pred... | 11/12/2002 |
| 6363176 | Picture data decompression apparatus The invention provides a picture data decompression apparatus which reduces the time required for decompression of picture data and operates at a high speed. The picture data decompression apparatus includes a module switching section for extracting code ... | 03/26/2002 |
| 6347116 | Non-linear quantizer for video coding A quantizer and dequantizer for use in a video coding system that applies non linear, piece-wise linear scaling functions to video information signals based on a value of a variable quantization parameter. The quantizer and dequantizer apply different non... | 02/12/2002 |
| 6345125 | Multiple description transform coding using optimal transforms of arbitrary dimension A multiple description (MD) joint source-channel (JSC) encoder in accordance with the invention encodes n components of a signal for transmission over in channels of a communication medium. In illustrative embodiments, the invention provides optimal or ne... | 02/05/2002 |
| 6333951 | Image processing system The present invention provides an image decoding and reconstruction system for successively reading out and decoding compression video data constituting one screen page and reconstructing an image with a memory of a small capacity. The system of the inven... | 12/25/2001 |
| 6311224 | Dynamically selectable data compression techniques based on processing capacity An apparatus is provided with operating logic for performing a number of data compression operations, and control logic for dynamically selecting one or more of the data compression operations, and have the selected data compression operation(s) performed... | 10/30/2001 |
| 6167086 | Overhead data processor in a memory efficient image processing system In an MPEG compatible image signal processor an MPEG data stream is decoded, decompressed and recompressed before blocks of image pixel values are stored in memory. The recompression system evaluates block data to determine the range and minimum pixel val... | 12/26/2000 |
| 6137835 | Picture coding apparatus using orthogonal transforms A picture coding apparatus includes a first compressing device for offset sampling input signals, and a second compressing device, having at an orthogonal transform circuit and a quantization device, for compressing the output from the first compressing d... | 10/24/2000 |
