摘要:
Various embodiments of the present invention are related to methods and apparatuses for decoding data, and more particularly to methods and apparatuses for probability-based multi-level LDPC decoding. For example, in one embodiment an apparatus includes a horizontal updater in a low density parity check decoder operable to iteratively perform row processing to update probabilities of multi-level symbol values, a vertical updater in the low density parity check decoder operable to iteratively perform column processing to update the probabilities of the multi-level symbol values, and a check sum calculation circuit operable to calculate total soft values for the multi-level symbol values.
摘要:
In general, in a first aspect, the invention features a method that includes forming a first layer comprising a first material over a surface of a second layer, wherein forming the first layer includes sequentially forming a plurality of monolayers of the second material over the surface of the second layer, the second layer comprises a plurality of rows of a second material extending along a first direction and spaced from one another in a second direction orthogonal to the first direction, and the first layer conforms to the surface of the second layer. The method further includes removing portions of the first layer to produce a plurality of rows of the first material extending along the first direction and spaced from one another in the second direction and removing portions of a third layer comprising a third material, where the portions correspond to intervals between the second plurality of rows so that removing the portions forms a plurality of rows of the third material extending along the first direction and spaced apart from one another. The first and second materials are different.
摘要:
A hard disk drive or other storage device comprises a storage medium, a read head configured to read data from the storage medium, and control circuitry coupled to the read head and configured to process data received from the read head. The control circuitry comprises read channel circuitry that includes a low-density parity check decoder or other type of decoder.Power management circuitry associated with the read channel circuitry is configured to detect a power control condition of the read channel circuitry and to control insertion of idle clock cycles in a clock signal supplied to the decoder responsive to the detected power control condition. For example, the read channel circuitry may comprise a clock generator configured to gate the clock signal responsive to a control signal from the power management circuitry.
摘要:
Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is disclosed that includes a media defect detector circuit. The media defect detector circuit is operable to compare a data input derived from a medium against at least a first defect level to yield a first level output, and a second defect level to yield a second level output; and provide a combination of the first level output and the second level output as a defect quality output. A value of the defect quality output corresponds to a likelihood of a defect of the medium.
摘要:
A project management server automatically monitors the progress of an Enterprise Resource Planning (ERP) project represented by developing business configuration content for the ERP system. The project management server maintains a set of data representing a previous status of the development of business configuration content for the ERP system. The project management server requests a new set of data from the ERP system. The new set of data represents the current status of the development of business configuration content for the ERP system. The project management server automatically compares the two sets of data to determine the progress of the ERP project, generates a report showing the progress and updates the old set of data with the new set of data.
摘要:
Various embodiments of the present invention provide systems and methods for decoding codewords in a multi-section non-binary LDPC decoder. For example, an LDPC decoder is disclosed that includes a variable node processor operable to perform variable node updates based at least in part on check node to variable node messages and to generate variable node to check node messages, and a check node processor operable to process the variable node to check node messages in groups across each of a plurality of sections of an H matrix and to generate the check node to variable node messages.
摘要:
Various embodiments of the present invention provide systems and methods for generating a code format. One method discussed includes: Various embodiments of the present invention provide methods for generating a code format. Such methods include: receiving an indication of a low weight codeword having a trapping set; selecting an initial value for a base matrix; testing the low weight codeword after modification by the initial value to determine an updated weight of the low weight codeword; and testing the low weight codeword after modification by the initial value to determine whether the trapping set remains.
摘要:
A gas sensor includes a housing having disposed therein a membrane electrode assembly comprising a sensing electrode, a counter electrode, and a polymer membrane disposed between the sensing electrode and the counter electrode. The polymer membrane comprises an ionic liquid retained therein. The sensor also includes a catalyst support that can be stable in a range of potentials to allow for detection mode and catalyst regeneration mode to be operative. The sensor further includes a circuitry and algorithm to implement the catalyst regeneration mechanism electrochemically. The sensor further includes a chamber for reference gas to which the counter electrode is exposed, and a chamber for test gas to which a gas to be tested is exposed. The sensor also includes a pathway for test gas to enter the chamber and a measured electrical circuit connecting the sensing electrode and the counter electrode.
摘要:
Various embodiments of the present invention provide systems and methods for data processing. For example, data processing systems are disclosed that include a data decoding system. The data decoding system includes a data decoder circuit and a simplified maximum likelihood value modification circuit. The data decoder circuit is operable to apply a data decode algorithm to a decoder input to yield a first decoded output and an indication of at least one point of failure of the first decoded output. The simplified maximum likelihood value modification circuit is operable to identify a symbol of the first decoded output associated with the point of failure, and to modify a subset of values associated with the identified symbol to yield a modified decoded output.
摘要:
Methods and systems for communicating information are disclosed, including creating sequence instructions configured to define a set of permitted sequences for a plurality of documents. The sequence instructions may be sent to a user and interpreted using an active user interface for the user to select one or more sequences from the set of permitted sequences. The plurality of documents may then be executed in response to the selecting one or more of the sequences.