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7596741 Packet protection for header modification  
A network device is provided which can include logic associated with the operations of a data communications protocol stack. The logic can operate to receive a packet to the network device and...
7587657 Method and apparatus for iterative error-erasure decoding  
Methods and apparatus are provided for improved iterative error-erasure decoding. A signal is decoded by obtaining a plurality of symbols associated with the signal and one or more corresponding...
7496826 Method, system, and apparatus for adjacent-symbol error correction and detection code  
A circuit and method for generating an Error Correcting Code (ECC) based on an adjacent symbol codeword that is formed in two clock phases among other techniques are described. In one embodiment,...
7461320 Memory system and method having selective ECC during low power refresh  
A computer system includes a processor coupled to a DRAM through a memory controller. The processor switches the DRAM to a low power refresh mode in which DRAM cells are refreshed at a sufficiently...
7447974 Memory controller method and system compensating for memory cell data losses  
A computer system includes a memory controller coupled to a memory module containing several DRAMs. The memory module also includes a non-volatile memory storing row addresses identifying rows...
7310765 Method and apparatus for checking read errors with two cyclic redundancy check stages  
A system for detecting errors in received input data includes a first error detection circuit. The first error detection circuit is configured to receive the input data. The input data includes at...
7290197 Correcting data using redundancy blocks  
Errors in data retrieved from a storage medium are corrected by retrieving a plurality of data blocks and a plurality of redundancy blocks associated with the plurality of data blocks from the...
7284164 Method and apparatus for error correction of read data in a disk drive  
A disk drive comprising a read channel including a decoder and an EP unit, and a disk controller including an error correction unit is disclosed. The EP unit generates error positional information...
7277498 Mapping method of code word with QAM modulation  
In the code word mapping operation of a radio communication system, mapping patterns are provided for different S/N ratios, the code word bits produced from a coder are not equally assigned to...
7266748 Method and apparatus for correcting C1/PI word errors using error locations detected by EFM/EFM+ decoding  
A method and system for error correcting C 1 /PI words using error locations detected by EFM/EFM+ decoder are provided. The method for channel decoding and error correcting includes: (a) setting up...
7260848 Hardened extensible firmware framework  
A method for hardening an extensible firmware framework and system in which the framework is implemented. In accordance with the method, a resource access policy that defines rules to allow or...
7231580 Nonvolatile memory apparatus and data processing system  
The reliability of data is significantly increased without considerably increasing costs by performing minor data corrections within an information storage device and performing major error...
7213191 System and method for securely storing data in a memory  
A system for securely storing data in a memory includes a memory ( 1 ) and a CPU (Central Processing Unit) ( 2 ). The memory is divided into a plurality of fixed-size blocks ( 10 ) for storing...
7181669 Device and method for block code error correction  
A device and method for block code error correction. The device includes a block code input unit, an erasing address table, an error table and a decoder. The block code input unit is used to input...
7171607 Apparatus and method for verifying erasure correction function  
When a special write command from a host is executed, switching is performed so that the data designated by the command will not be input to an ECC generator. In accordance with an erasure pointer...
7168026 Method and apparatus for preservation of failure state in a read destructive memory  
One aspect of the invention provides a novel scheme to preserve the failure state of a memory location. According to one embodiment, the data is read from a memory location in a read-destructive...
7165195 Method, system, and apparatus for bit error capture and analysis for serial interfaces  
An apparatus and method to facilitate validation and/or test of serial interfaces by analyzing error event types based at least in part on a code-stamp, compare engine logic and a memory for error...
7051238 Method and system for using machine-architecture support to distinguish function and routine return values  
A method and system for nearly immediately trapping a failure-to-check-a-return-value error in a computer program. Modern processor architectures, such as the Intel® IA-64 processor architecture,...
7020810 Method and apparatus for propagating error status over an ECC protected channel  
System and methods for propagating error status over an error checking and correcting (ECC) protected channel. A first device receives data and an error status associated with the data. The first...
6981197 Enhanced interleave type error correction method and apparatus  
An enhanced interleave type error correction method is provided in which decoding of an enhanced interleave block is done. Subsequently the decoding may be done by decoding the estimated codewords...
6735733 Method for the correction of a bit in a string of bits  
A method for the correction of an erroneous bit in a string of bits includes providing, in the string of bits, for a first parity bit computed from the other bits of the string of bits at a point...
6732320 Method and system for improved error correction in optical media data processing  
The present invention provides a method and system for error correction in optical media data processing. The method includes demodulating a data using a conversion table; marking errors which...
6704371 Receiver for communication  
A low noise and lower power consumption receiver including a CRC error correction circuit which is constructed at low cost, prolongs a life of a battery and enhances a receiving sensitivity. The...
6701481 Recording apparatus, recording system and error notification method  
A recording apparatus is provided with a recording medium, an error correction circuit and an error processing circuit. The error correction circuit corrects errors in read data which are read from...
6415411 Error correcting decoder  
The error correcting decoder using an erasure flag process for a digital signal, according to the present invention, comprises: a row code word corrector for correcting errors in each row; a column...
6339627 Synchronization detector capable of detecting location of frame without synchronization signal included in the frame  
A synchronization detector has three registers to memorize individual patterns of three successive frames. A decoder produces a frame location signal on the basis of the individual patterns. A...
6163871 RAM based error correction code encoder and syndrome generator with programmable interleaving degrees  
Encoders, syndrome generators, and methods for generating ECC check bytes and partial syndromes from a user data sector using a single RAM unit. The user data includes a plurality of data bytes....
6101619 Method for improving access performance on track with re-allocation sector in a hard disk drive  
A hard disk drive replaces a defective sector with a spare sector. When accessing a track having the defective sector, all normal sectors except for the defective sector are formerly accessed and...
6081919 Coding and decoding system using CRC check bit  
A coding and decoding system which uses CRC check bits is disclosed. When a coding apparatus performs coding, symbol interleaving is performed after coding by an outer code of a concatenated code,...
6079045 Transmission system and recording system having a simplified symbol detector  
In a transmission system or recording system, a detector (16,30) using quality measures indicating the quality of the received signal is applied. In contradistinction with the prior art system the...
6040953 Adaptive data recovery method and means tuned to thermal asperities in a cyclic, multitracked magnetic storage subsystem  
A method and system for resolving error or erasure in binary data streams read back using MR heads from a cyclic, multitracked recording medium. The method assesses whether an erasure or error was...
6038692 Error correcting memory system  
An error correcting memory system, which writes and reads m-bit data and an error marking n-bit pointer by a predetermined rule, includes a first memory for m-bit data; a second memory for the...
6009500 Replacement of erroneous firmware in a redundant non-volatile memory system  
The original firmware of a computing device is stored in a fixed non-volatile ROM-type memory while any subsequently issued replacement firmware correcting or upgrading erroneous firmware contained...
5942004 Device and a method for storing data and corresponding error-correction information  
The invention relates to a multi-level storage device including: at least a first plurality of cells storing an identical first number (greater than one) of binary data, and at least a...
5942001 Information processing apparatus  
Channel data obtained from a reproduced signal is input to a demodulation ROM as an address and demodulated. In the demodulated channel data, the data whose data pattern is not consistent with a...
5920580 Multiple error detection in error detection correction circuits  
A multi-error detector uses single byte error correcting-double byte error detecting codes but detects some multiple errors including double, triple, quadruple and more errors in a code. To detect...
5901159 Apparatus and method for decoding a coded digital signal  
Digital signal decoder which decodes coded data, for example, a coded digital video signal, that has error-correcting data such as C1/C2 convolutional Reed-Solomon type data added thereto. The...
5850403 Process of selectively protecting information bits against transmission errors  
Based on the sequence of the information bits to be transmitted, the coder forms a second sequence of bits c n , which includes a redundant subset. A differential coding of the form d n =c n ♁d...
5844920 Thermal asperity compensation using multiple sync marks for retroactive and split segment data synchronization in a magnetic disk storage system  
A magnetic disk storage system is disclosed wherein byte synchronization to sector data is achieved even when noise in the read channel, due for instance to a thermal asperity (TA), corrupts the...
5751733 Interleaved redundancy sector for correcting an unrecoverable sector in a disc storage device  
A disc drive storage system is disclosed that employs sector level and track level error correction systems (ECS), wherein the track level error correction capability is increased by interleaving...
5748649 System enabling a magnetic code recorded on a magnetic track to be properly decoded in the form of a binary message  
The magnetic code may include a run of b spoiled bits in a position that is locatable. The system consists in adding a check structure of k bits to the m-bit message in such a manner that the...
5740187 Data processing using interpolation of first and second information based on different criteria  
A data reproducing apparatus having: an error correcting circuit for correcting an error in an error correcting block in accordance with an error correcting code, the error correcting block...
5732093 Error correction method and apparatus on optical disc system  
An error correction method and apparatus for optical disc systems, capable of performing error correction procedures selectively according to the type of optical disc being used, such as CD-DA and...
5727003 Method and apparatus for flash burst error correction  
An error correction system (20) operates on clock cycles to decode a sequence of error correcting symbols (R(x)) received from a disk drive (24), and alternatively to encode data in a codeword for...
5701314 On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive  
In a magnetic disk drive storage system comprising a sampled amplitude read channel and an on-the-fly error correction coding (ECC) system, a thermal asperity compensation technique wherein: a...
5684810 Error correcting decoder and error correction decoding method  
After one dimension of error detection and correction has been performed on a block of data, error correction in the other dimension may be selected to be either erasure-and-error correction or...
5627844 Address generator for EFM decoder employing scrambling counters  
An address generator in the demodulator for an optical disk system generates addresses necessary for recording demodulated EFM in a predetermined area of a memory in the demodulator of an optical...
5623507 Error pointers for enhanced error correction  
Signal processing circuitry receives input signals representing modulation encoded binary data signals. The signal processing circuitry contains a plurality of signal quality detectors which...
5588010 Parallel architecture error correction and conversion system  
A system and method for converting data with one error correction code format to data with a different error correction code format, including provisions for correcting the errors in the input data...
5541939 Error correction code decoder and a method thereof  
An error correction decoder that, if the sum of the number of instances of error data and possible error data is in the range of the error correction capacity of the decoder, recognizes all the...
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