45results about "Code conversion" patented technology

Various embodiments of the present invention provide systems and methods for data processing. For example, a variable iteration data processing system is disclosed that includes a first detector, a second detector, a decoder and a unified memory buffer. An input data set is received by the first detector that performs a data detection and provides a first detected data set. The decoder receives a derivative of the first detected data set and performs a decoding operation that yields a decoded data set. In some cases, the derivative of the first detected data set is an interleaved version of the first detected data set. The decoded data set is written to a unified memory buffer. The first decoded data set is retrievable from the unified memory buffer and a derivative thereof is provided to the second detector. In some cases, the derivative of the decoded is a de-interleaved version of the decoded data set. The second detector is operable to perform a data detection on the derivative of the decoded data set and to provide a second detected data set that is written to the unified memory buffer.

A mobile radio telecommunications system is described in which the same user message is transmitted with forward error correction (FEC) codes on three separate channels to a receiver. The FEC codes for the three signals are different, e.g. different bits are punctured in the first signal compared with the second signal and so on. The receiver includes a plurality of data receivers for extracting the receiver signals as well as a forward error correction decoder for substantially simultaneously decoding the differently forward error correction coded signals. The extracted decoded signals can be used individually or combined in a variety of ways to improve reception.

Integrated circuit memory devices include an array of nonvolatile N-bit memory cells, where N is an integer greater than one. Control circuitry is also provided to reliably read data from the N-bit memory cells. This control circuitry, which is electrically coupled to the array, is configured to determine, among other things, a value of at least one bit of data stored in a selected N-bit memory cell in the array. This is done by decoding at least one hard data value and a plurality of soft data values (e.g., 6 data values) read from the selected N-bit memory cell using a corresponding plurality of unequal read voltages applied to the selected N-bit memory cell during a read operation.

A MIMO transmitter including an interleaving system for parsing encoded bits to a plurality of spatial streams and a plurality of interleavers to interleave bits for spatial streams such that at least a first spatial stream uses a first stream interleaver that interleaves with a pattern distinct from a second stream interleaver interleaving for a second spatial stream.

A storage device comprising has a storage medium, a read-write mechanism, an object-based file system interface, and a controller. The read-write mechanism is adapted to read and to write data from and to the storage medium. The object-based file system interface within the storage device is adapted to organize and access data on the storage medium as objects and to access attributes of each data object. The controller is adapted to generate redundancy data for each data object to be stored on the storage medium according to the associated attributes and to store the data object and its associated redundancy data on the storage medium.

A system and a method for the scalable coding of a multi-channel audio signal comprising a principal component analysis (PCA) transformation of at least two channels (L, R) of the audio signal into a principal component (CP) and at least one residual sub-component (r) by rotation defined by a transformation parameter (θ), comprising the following steps: formation of a frequency subband-based residual structure (Sf_r) on the basis of the at least one residual sub-component (r), and definition of a coded audio signal (SC) comprising the principal component (CP), at least one residual structure (Sf_r) of a frequency subband and the transformation parameter (θ).

A method for compressing files utilizing a dictionary within a data-processing system is disclosed. A binary file commonly available to a data-compressing system during compression and to a data-decompressing system during decompression can be served as a dictionary file. A first dictionary array is initially generated utilizing the dictionary file. Each entry within the first dictionary array includes a set of unique bit patterns from the dictionary file. An input file is parsed into multiple blocks, with each block having the same length as each entry within the first dictionary array. The input file is then compared against the first dictionary array, and each entry within the first dictionary array that includes the same bit patterns as a block from the input file is marked accordingly. A second dictionary array that includes all the marked entries from the first dictionary array is subsequently generated, and this second dictionary array is utilized in the compression of the input file. During compression, any block from the input file having a bit pattern found in the second dictionary array will be replaced by a corresponding index to the second dictionary array.

A transmitting unit divides a transmit data into a plurality of code blocks, and encodes each of the plurality of code blocks to generate a transmission signal. The transmitting unit transmits the transmission signal, and a receiving unit receives the transmission signal as a reception signal. The receiving unit receives performs an iterative decoding to each of the plurality of code blocks of the reception signal. The iterative decoding is terminated to a first code block group in which an error has not been detected before a first setting iteration count. The receiving unit, when being an error in the reception signal, transmits a retransmission request feedback data which contains a NACK data and a data indicating the first code block group to the transmitting unit. First resources are assigned for each of the plurality of code blocks of the transmission signal. The transmitting unit assigns resources of the first code block group of the plurality of code blocks of the transmission signal to second resources which are fewer than the first resources, based on the retransmission request feedback data, and retransmits the transmission signal to the receiving unit.

Methods and apparatus are provided for coding and decoding a digital audio signal. Decoding includes: decoding according to an inverse transform decoding of a previous frame of samples of the digital signal, which is received and coded according to a transform coding; and decoding according to a predictive decoding of a current frame of samples of the digital signal, which is received and coded according to a predictive coding. The predictive decoding of the current frame is a transition predictive decoding which does not use any adaptive dictionary arising from the previous frame. At least one state of the predictive decoding is reinitialized to a predetermined default value, and an add-overlap step combines a signal segment synthesized by predictive decoding of the current frame and a signal segment synthesized by inverse transform decoding, corresponding to a stored segment of the decoding of the previous frame.

An Forward Error Correction (FEC) apparatus and method for reducing Bit error rates (BER) and Frame Error Rates (FER) using turbo decoding in a digital communication system. In a constituent decoder for decoding a turbo code, a first adder calculates the LLR of a received code symbol by calculating the difference between the probability of the code symbol being 1 and that of the code symbol being 0 at an arbitrary state of a turbo decoding trellis. A second adder adds the transmission information and a priori information of the code symbol. A third adder calculates the difference between the outputs of the first and second adders as extrinsic information. A first multiplier multiplies the output of the third adder by a predetermined weighting factor as a feedback gain. A correction value calculator calculates a correction value using the difference between the best metric and the second best metric of the code symbol. A fourth adder adds the correction value to the output of the first multiplier.

A method for calculating a direct mode motion vector for a bi-directionally predictive-picture includes: calculating S based on TRB, TRD, and N; calculating Tx based on MVx, the S, and the N; calculating Ty based on MVy, the S, and the N; obtaining a sum of the Tx, MVDx and δ1x, and using the obtained sum as MVFx; obtaining a sum of the Ty, MVDy and δ1y, and using the obtained sum as MVFy; obtaining a sum of the MVFx, δ2x, and a minus value of the MVx, and using the obtained sum as MVBx; and, obtaining a sum of the MVFy, δ2y, and minus value of the MVy, and using the obtained sum as MVBy.

Techniques for data storage are provided. In one aspect, a method for writing one or more magnetic memory cells comprises the following steps. Data is written to one or more of the magnetic memory cells. It is detected whether there are any errors in the data written to the one or more magnetic memory cells. The data is rewritten to each of the one or more previously written magnetic memory cells in which an error is detected.

A method begins by a dispersed storage (DS) processing module monitoring storage of data, wherein the data is encoded using a dispersed storage error coding function to produce a plurality of sets of encoded data slices and is stored as the plurality of sets of encoded data slices. The method continues with the DS processing module determining analysis priority of the data in accordance with an analysis prioritization protocol. When the analysis priority of the data compares unfavorably to a first priority threshold, the method continues with the DS processing module issuing a command to delete an encoded data slice from each set of at least some of the plurality of sets of encoded data slices.

A method, system and memory controller are provided for implementing ECC (Error Correction Codes) control to provide enhanced endurance and data retention of flash memories. The memory controller includes a VT (threshold voltage) monitor to determine VT degradation of cells and blocks; the VT monitor configured to store information about the determined VT degradation; a first ECC engine having a first level of ECC capability; a second ECC engine having a second level of ECC capability, the second level higher than the first level, the second ECC engine having a longer latency than the first ECC engine; a logic to issue a read request to a particular cell/block, and, using the determined VT degradation, use the first ECC engine if the determined VT degradation is less than a threshold and to use the second ECC engine if the determined VT degradation is above the threshold.

A data output apparatus converts input data into data that changes less than the input data, and outputs the converted data to a memory.

Disclosed herein is a method of generating an encoded data packet over GF(2). The method comprises determining 303 a plurality of data packets in dependence on a Latin rectangle, wherein the plurality of data packets have equal length; and generating 305 an encoded data packet by bitwise XORing the determined plurality of data packets. The efficiency of encoding, decoding, and transmission over a network of data packets are all improved, as well as the security properties of the transmitted information.

A compression technique compresses interaction data. The interaction data can include a matrix of interaction data used in solving an integral equation. For example, such a matrix of interaction data occurs in the moment method for solving problems in electromagnetics. The interaction data describes the interaction between a source and a tester. In one embodiment, directional sources and/or directional testers are described. The directional sources produce a very weak (or negligible) effect except in selected directional regions. The directional testers are relatively insensitive to an incoming effect except in selected directional regions. Depending on their locations and directional properties, relatively many of the directional sources and directional testers interact weakly (or negligibly). The weak interactions can be effectively removed from the interaction matrix, thereby reducing the effective size of the interaction matrix.

An apparatus and method for minimizing the quantization noise as muting are provided, and particularly applied to a Delta-Sigma modulator that is used to process digital-to-analog conversion. By means of a zero-sampling detection circuit and a dynamic gain mechanism, a dynamic gain is introduced to minimize the quantization noise occurred as muting. The method preferably includes a first step for receiving the signals by the Delta-Sigma modulator inputted from an audio decoder, and a next step for detecting signal zero by a zero-sampling detection unit and counting the number of the signals with signal zero. The mute state is entered when the number of signal zeros reaches a pre-set number. At the moment, the signaling route is switched to another route with dynamic gain mechanism. Further, the dynamic gain mechanism is activated for producing a dynamic gain, which will be fed back to the input end of the modulator.

A method and apparatus are described for determining whether to convey a communication signal in a compressed form along a communication path. The method comprises the steps of: (i) providing the communication signal that should be conveyed along said communication path; (ii) determining whether at least part of the communication signal comprises data having a non-random distribution; (iii) if the at least part of the communication signal is determined to comprise data having at least partially a non-random distribution, applying a compression algorithm onto that at least part of the communication signal to form a compressed form of the communication signal provided; and (iv) conveying the communication signal in its compressed form along the communication path.

The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for performing data decoding including selective complexity data decoding.

Methods, devices and systems enhance compression and decompression of data values when they comprise a plurality of semantically meaningful data fields. According to a first inventive concept of the present invention disclosure, compression is not applied to each data value as a whole, but instead to at least one of the semantically meaningful data fields of each data value, and in isolation from the other ones. A second inventive concept organizes the data fields that share the same semantic meaning together to accelerate compression and decompression as multiple compressors and decompressors can be used in parallel. A third inventive concept is a system where methods and devices are tailored to perform compression and decompression of the semantically meaningful data fields of floating-point numbers after first partitioning further at least one of said data fields into two or a plurality of sub-fields to increase the degree of value locality and improve compressibility of floating-point values.

Methods and apparatus for constructing a parity check matrix for use in a low-density parity check (LDPC) coding scheme are provided. The apparatus includes at least one index generator for generating row indexes of “1”s, which indicate row positions of the “1”s in each column of the parity check matrix, wherein the index generator is implemented by a modular shift register generator that generates a row index of a “1” at each clock.

Image data having ultra-high definition at a high frame rate is processed to obtain image data, having a basic format, from which an image having high definition at a basic frame rate is to be obtained, image rate, having a first enhancement format, from which an image having high definition at a high frame rate is to be obtained, image data, having a second enhancement format, from which an image having ultra-high definition at a basic frame rate is to be obtained, and image data, having a third enhancement format, from which an image having ultra-high definition at a high frame rate is to be obtained. A basic video stream containing an encoded image data of the image data having the basic format, and a predetermined number of enhancement video streams containing the encoded image data of the image data having the first, second, and third enhancement formats are produced.