Patent application number | Description | Published |
20110075287 | System and method for map detector for symbol based error correction codes - A system for decoding data includes a symbol based error correction code device. The error correction code device includes a channel detector configured to generate probability mass function (PMF) information. The error correction code device further includes a decoder coupled to the channel detector. The decoder is configured to use the PMF information from the channel detector to perform an error correction code operation. The decoder also is configured to generate PMF information. The channel detector is configured to receive extrinsic PMF information in a turbo equalization scheme. | 03-31-2011 |
20110085628 | ADAPTIVE DATA DEPENDENT NOISE PREDICTION (ADDNP) - A method is provided. The method comprises calibrating noise prediction parameters by adapting one or more biases, adapting one or more filter coefficients using the adapted one or more biases, and adapting one or more prediction error variances using the adapted one or more biases and the adapted one or more filter coefficients. | 04-14-2011 |
20120036395 | DETECTING DATA-WRITE ERRORS - An embodiment of a data read path includes recovery and decoder circuits. The recovery circuit is operable to recover coded data from a storage medium, and the decoder circuit is operable to detect, in the recovered data, a write error that occurred during a writing of the coded data to the storage medium. For example, such an embodiment may allow detection of a write error that occurred while writing data to a bit-patterned storage medium. | 02-09-2012 |
20120036414 | RENDERING DATA WRITE ERRORS DETECTABLE - An embodiment of a data write path includes encoder and write circuits. The encoder circuit is operable to code data so as to render detectable a write error that occurs during a writing of the coded data to a storage medium, and the write circuit is operable to write the coded data to the storage medium. For example, such an embodiment may allow rendering detectable a write error that occurs while writing data to a bit-patterned storage medium. | 02-09-2012 |
20130275714 | MAPPING BETWEEN PROGRAM STATES AND DATA PATTERNS - The present disclosure includes methods and apparatuses for mapping between program states and data patterns. One method includes: programming a group of G memory cells such that a combination of respective program states of the group maps to a constellation point corresponding to a received N unit data pattern, the group used to store N/G units of data per memory cell; wherein the constellation point is one of a number of constellation points of a constellation associated with mapping respective program state combinations of the group of memory cells to N unit data patterns; and wherein the constellation comprises a first mapping shell and a second mapping shell, the constellation points corresponding to the respective first and second mapping shells determined, at least partially, based on a polynomial expression of order equal to G. | 10-17-2013 |
20140036589 | MEMORY CELL STATE IN A VALLEY BETWEEN ADJACENT DATA STATES - The present disclosure includes apparatuses and methods related to memory cell state in a valley between adjacent data states. A number of methods can include determining whether a state of a memory cell is in a valley between adjacent distributions of states associated with respective data states. The method can also include transmitting a signal indicative of a data state of the memory cell and whether the state of the memory cell is in the valley. | 02-06-2014 |
20140164867 | STOPPING CRITERIA FOR LAYERED ITERATIVE ERROR CORRECTION - The present disclosure includes apparatuses and methods related to stopping criteria for layered iterative error correction. A number of methods can include receiving a codeword with an error correction circuit, iteratively error correcting the codeword with the error correction circuit including parity checking the codeword on a layer-by-layer basis and updating the codeword after each layer. Methods can include stopping the iterative error correction in response to a parity check being correct for a particular layer. | 06-12-2014 |
20140244964 | DUAL MAPPING BETWEEN PROGRAM STATES AND DATA PATTERNS - The present disclosure includes methods and apparatuses for dual mapping between program states and data patterns. One apparatus includes a memory and a controller configured to control a dual mapping method comprising: performing a base conversion on a received data pattern and mapping a resulting base converted data pattern to one of a first number of program state combinations corresponding to a first group of memory cells; and determining a number of error data units corresponding to the base converted data pattern and mapping the number of error data units to one of a number of second program state combinations corresponding to a second group of memory cells. The number of error data units are mapped to the one of the second number of program state combinations corresponding to the second group of memory cells without being base converted. | 08-28-2014 |
20140351491 | MAPPING BETWEEN PROGRAM STATES AND DATA PATTERNS - The present disclosure includes methods and apparatuses for mapping between program states and data patterns. One method includes: programming a group of G memory cells such that a combination of respective program states of the group maps to a constellation point corresponding to a received N unit data pattern, the group used to store N/G units of data per memory cell; wherein the constellation point is one of a number of constellation points of a constellation associated with mapping respective program state combinations of the group of memory cells to N unit data patterns; and wherein the constellation comprises a first mapping shell and a second mapping shell, the constellation points corresponding to the respective first and second mapping shells determined, at least partially, based on a polynomial expression of order equal to G. | 11-27-2014 |
20150162089 | MAPPING BETWEEN PROGRAM STATES AND DATA PATTERNS - The present disclosure includes methods and apparatuses for mapping between program states and data patterns. One method includes: programming a group of G memory cells such that a combination of respective program states of the group maps to a constellation point corresponding to a received N unit data pattern, the group used to store N/G units of data per memory cell; wherein the constellation point is one of a number of constellation points of a constellation associated with mapping respective program state combinations of the group of memory cells to N unit data patterns; and wherein the constellation comprises a first mapping shell and a second mapping shell, the constellation points corresponding to the respective first and second mapping shells determined, at least partially, based on a polynomial expression of order equal to G. | 06-11-2015 |
20150270855 | DETERMINING SOFT DATA USING A CLASSIFICATION CODE - Apparatuses and methods for determining soft data using a classification code are provided. One example apparatus can include a classification code (CC) decoder and an outer code decoder coupled to the CC decoder. The CC decoder is configured to receive a CC codeword. The CC codeword includes a piece of an outer code codeword and corresponding CC parity digits. The CC decoder is configured to determine soft data associated with the piece of the outer code codeword, at least partially, using the corresponding CC digits. | 09-24-2015 |
20150286522 | DUAL MAPPING BETWEEN PROGRAM STATES AND DATA PATTERNS - The present disclosure includes methods and apparatuses for dual mapping between program states and data patterns. One apparatus includes a memory and a controller configured to control a dual mapping method comprising: performing a base conversion on a received data pattern and mapping a resulting base converted data pattern to one of a first number of program state combinations corresponding to a first group of memory cells; and determining a number of error data units corresponding to the base converted data pattern and mapping the number of error data units to one of a number of second program state combinations corresponding to a second group of memory cells. The number of error data units are mapped to the one of the second number of program state combinations corresponding to the second group of memory cells without being base converted. | 10-08-2015 |
Patent application number | Description | Published |
20140153332 | DETERMINING SOFT DATA FROM A HARD READ - Apparatuses and methods involving the determination of soft data from hard reads are provided. One example method can include determining, using a hard read, a state of a memory cell. Soft data is determined based, at least partially, on the determined state. | 06-05-2014 |
20140208054 | DETERMINING SOFT DATA FOR FRACTIONAL DIGIT MEMORY CELLS - Apparatuses and methods for determining soft data for fractional digit memory cells are provided. One example apparatus can include a controller to determine states of memory cells of a group of memory cells operated as fractional digit memory cells, and determine soft data based, at least partially, on dimensions to which particular memory cells correspond with respect to the group of memory cells, determined states of the memory cells with respect to a state adjacent a state corresponding to a swapping shell, and whether a particular memory cell is a candidate for swapping. | 07-24-2014 |
20140208189 | DETERMINING SOFT DATA USING A CLASSIFICATION CODE - Apparatuses and methods for determining soft data using a classification code are provided. One example apparatus can include a classification code (CC) decoder and an outer code decoder coupled to the CC decoder. The CC decoder is configured to receive a CC codeword. The CC codeword includes a piece of an outer code codeword and corresponding CC parity digits. The CC decoder is configured to determine soft data associated with the piece of the outer code codeword, at least partially, using the corresponding CC digits. | 07-24-2014 |