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| Number | Title | Issue Date |
| 8164490 | Data compression/decompression method and computer readable storage medium storing compression/decompression program Repetitive portions are sequentially detected in compression target data, and it is determined whether the approximately corresponding position of each repetitive portion is under a word-repetition condition, which is a position corresponding to a multiple of a leng... | 04/24/2012 |
| 8149147 | Detecting and reordering fixed-length records to facilitate compression Disclosed herein are one or more embodiments that facilitate compression of a source file having a fixed-length record therein. One or more of the disclosed embodiments detect the fixed-length records and determine a reordering plan for the source file, including de... | 04/03/2012 |
| 8077063 | Method and system for determining bit stream zone statistics An input bit stream is received and zone statistics such as zones count, zones center bit positions, and zones lengths are determined, where a zone is a set of non-transitioning bits in the input bit stream. Beginning and ending bit positions for each zone are deter... | 12/13/2011 |
| 8018359 | Conversion of bit lengths into codes Various embodiments are provided to reduce a processing time taken when plural bit lengths each assigned to plural strings are converted into plural codes. In one exemplary embodiment, in response to input of the plurality of bit lengths, a number of strings assigne... | 09/13/2011 |
| 7952499 | Random access in run-length encoded structures Random access to run-length encoded data values is provided. A target value is identified by a logical index into a structure of run-length-encoded values. To access the value, a bookmark is selected based on the logical index, on a maximum logical index of the book... | 05/31/2011 |
| 7926007 | Writing apparatus, writing data conversion method, and computer-readable recording medium storing program using Huffman tree for converting writing data in lithographic process A writing apparatus includes a unit storing writing data, a unit which acquires pattern information on patterns defined in the data, a unit which generates a table where each pattern information corresponds to a number of times each pattern information is used, for ... | 04/12/2011 |
| 7701369 | Method and encoder for encoding a size of a data section and method and decoder for determining a size of a data section The invention is related to a method for encoding a size of a data section and to an encoder for encoding a size of a data section. The invention is further related to a method for determining a size of a data section and to a decoder for determining a size of a dat... | 04/20/2010 |
| 7567188 | Policy based tiered data deduplication strategy The present invention provides for a method, system, and computer program for the application of data deduplication according to a policy-based strategy of tiered data. The method operates by defining a plurality of data storage policies for data in a deduplication ... | 07/28/2009 |
| 7397411 | Method, apparatus, system, and program for code conversion transmission and code conversion reception of audio data A system and a method of suppressing outstanding degradation of decoded audio quality due to a transmission error of audio coded data are provided without feedback information from a receiver, thereby reducing the increase of the number of necessary transmission ban... | 07/08/2008 |
| 7372377 | Method and apparatus for position identification in runlength compression data A position in runlength compression data corresponding to a desired position in original data can be found fast. Index correspondence information is generated for representing correspondence between indexes representing predetermined positions in data arrangement of... | 05/13/2008 |
| 7365658 | Method and apparatus for lossless run-length data encoding An apparatus and method for lossless run-length data encoding is disclosed. In the first stage of the method, an input data sequence is transformed without increasing its volume in order to obtain long sequences of identical digits. In the second stage, every such s... | 04/29/2008 |
| 7353447 | System and method for representing compressed information The present invention provides a system and method for storing re-synchronization, error correction and/or error detection data within an existing communication protocol, while still maintaining full compliance to a standard, such as the MPEG-2 AAC standard. By doin... | 04/01/2008 |
| 7348904 | Selective updating of compression dictionary A telecommunications network comprises a sending entity (22) and a receiving entity (24) which communicate over a radio interface (26). The sending entity (22) comprises a compressor (40) and a message formatter (34). The co... | 03/25/2008 |
| 7340103 | Adaptive entropy encoding/decoding for screen capture content Adaptive entropy encoding and decoding techniques are described. For example, a screen capture encoder and decoder perform adaptive entropy encoding and decoding of palettized screen capture content in screen capture video. The encoder selects between different entr... | 03/04/2008 |
| 7339506 | Variable length coding method and variable length decoding method An image coding apparatus is provided with a unit operable to scan a two-dimensional array of quantized coefficients into scanned quantized coefficients, the scanning being performed from a low frequency component toward a high frequency component; a unit operable t... | 03/04/2008 |
| 7339505 | Image compression and decompression Techniques employable to compress and decompress images are presented herein. ... | 03/04/2008 |
| 7337118 | Audio coding system using characteristics of a decoded signal to adapt synthesized spectral components A receiver in an audio coding system receives a signal conveying frequency subband signals representing an audio signal. The subband signals are examined to assess one or more characteristics of the audio signal. Spectral components are synthesized having the assess... | 02/26/2008 |
| 7333035 | Data encoding apparatus, data decoding apparatus, data encoding method, data decoding method, and recording medium recorded with program This data encoding apparatus includes: a predictor for calculating a prediction value of target data; a subtractor for calculating the difference between the target data and the prediction value as a prediction error value; an absolute value calculator for calculati... | 02/19/2008 |
| 7330809 | Trace data compression system and trace data compression method and microcomputer implemented with a built-in trace data compression circuit A trace data compression system includes a data acquisition circuit which is configured to acquire address information for identifying an address for reading or writing operation of a microcomputer which performs predetermined processing, and data information as ope... | 02/12/2008 |
| 7330137 | Method and apparatus for RLL code encoding and decoding An encoder and decoder for encoding data bits of a binary source signal into a stream of data bits of a binary channel signal and vice versa includes a conversion table used to map m-bit source words to codeword having a variable code length with a basic code length... | 02/12/2008 |
| 7327293 | Compression and data encoding for transmission over a character-based protocol ACARS systems and methods for compiling messages includes a processing device configured for mapping eight-bit characters in an eight-bit character stream into a six bit map to create a generally six-bit character stream. The processing device is further configured ... | 02/05/2008 |
| 7327289 | Data-modifying run length encoder to avoid data expansion A method of selectively run length encoding data may include removing a trigger value from one or more data elements if the trigger value is present in the one or more data elements and calculating a run length of the one or more data elements. The method may also i... | 02/05/2008 |
| 7324699 | Extension of two-dimensional variable length coding for image compression A method and an apparatus to decode a bitstream that includes codewords formed by a method of encoding series of quantized coefficients of a transform of a block of image data. The encoding method includes forming events from the series of quantized transform coeffi... | 01/29/2008 |
| 7319697 | Data communication system according to a packet-switching principle The present invention relates to a communicating data system comprising devices (11, 12, 13, 14) for routing said data that are interconnected by communication links, the data being transmitted in packets and a packet comprising a header. A transmitting part ... | 01/15/2008 |
| 7317766 | Apparatus and method for demodulating signal An apparatus for and a method of signal demodulation which reduces a number of calculations required for demodulating an M-bit codeword which has been modulated from an N-bit codeword. Probability data for each bit of the M-bit codeword is tested to determine if the... | 01/08/2008 |
| 7312731 | Variable length coding method and variable length decoding method An image decoding apparatus is provided with a unit operable to receive coded data including a coded run value and a coded level value, wherein the coded run value is obtained by coding a run value which indicates the number of continuous quantized coefficients, eac... | 12/25/2007 |
| 7312730 | Variable length coding method and variable length decoding method An image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the nu... | 12/25/2007 |
| 7308150 | Image processing apparatus To provide an image coding apparatus that can generate a code that can be decoded by a general decoding apparatus while attaining a high coding speed. As a result of processing in a plurality of prediction units 21, a control unit 11 generates a predic... | 12/11/2007 |
| 7295610 | Hybrid rate control in a digital stream transcoder A rate controller in run-level domain transcoder, which receives a stream of compressed frames carried in a bit stream, selectively determines whether to quantize and/or threshold portions of a frame carried in the stream of frames. The rate controller determines th... | 11/13/2007 |
| 7292162 | Data coding system and method A data coding system that compresses data and enables data, e.g., prefix addresses, to be represented with significantly fewer memory cells when compared to conventional coding systems. ... | 11/06/2007 |
| 7289658 | Removal of relatively unimportant shapes from a set of shapes A method for reducing a number of shapes, and a computer readable program code adapted to perform said method. The method forms first and second shape patterns. The second shape pattern includes the first shape pattern and error shapes. The error shapes are extracte... | 10/30/2007 |
| 7283069 | Method for encoded or encrypted bit stream synchronization An improved method is provided for identifying a repeated codeword in an incoming bit stream. The method includes: receiving an incoming bit stream having an expected codeword repeated a number of times; determining whether a group of incoming data bits correlates t... | 10/16/2007 |
| 7283591 | Parallelized dynamic Huffman decoder Several code detectors in parallel simultaneously examine varying overlapping segments of a data stream containing variable length codes, referred to as a data window. The data window segments directly address memory structures within each of the code detectors with... | 10/16/2007 |
| 7280057 | Dictionary-based compression and decompression The invention discloses a compressor for encoding data and a decompressor for decoding data. The data compressor comprises an encoder configured to encode a data file using a dictionary-based compression. The encoder is configured to reset the dictionary at least on... | 10/09/2007 |
| 7280055 | Method and apparatus for encoding binary data as a zero terminated string Passing input strings through an application programming interface between functions that take null byte terminated strings as arguments, where at least some of said input strings contain null bytes internally. This is accomplished by storing the positions of the nu... | 10/09/2007 |
| 7275115 | Cable modem system and method for supporting packet PDU compression A cable modem system and method are provided for using a data compression dictionary to transmit compressed payload data in a DOCSIS network while utilizing conventional cable modem termination system (CMTS) equipment. A cable modem system in accordance with the inv... | 09/25/2007 |
| 7263126 | System and method for transcoding with adaptive bit rate control A system and method are provided for adaptive rate control in the transcoding of video streams. The method comprises: accepting frames of an input MPEG encoded video stream; decoding the video stream; determining video stream complexity; for each frame, calculating ... | 08/28/2007 |
| 7262718 | Variable length decoder and variable length decoding method A variable length decoder comprises: a first storage unit that stores encoded data; a variable length decoding unit; a second storage unit that stores coefficient data; a reverse quantizing unit; and a reverse DCT unit. The variable length decoding unit includes a c... | 08/28/2007 |
| 7242328 | Variable length coding for sparse coefficients Coding quantized transform coefficients as occur in image compression includes, for a subset of coefficient amplitude values coding by a first method corresponding to each amplitude of the subset, events of a run of zero or more zero-valued coefficients ending in th... | 07/10/2007 |
| 7236633 | Data compression and decompression techniques for programmable circuits The present invention provides techniques for compressing and decompressing data in a programmable circuit. Programmable circuits can be configured according to user design by configuration data. Configuration data is compressed using a compression algorithm to save... | 06/26/2007 |
