Abstract: A data storage device may be configured with at least one data sector sync mark. Various embodiments are generally directed to a data sector having a sync mark and stored on a data storage medium with the sync mark having either a first or second patterns and a sync circuit configured to distinguish between the two different patterns to identify a status of at least some other portion of the data sector.

Abstract: A transmission/reception system includes first to Nth channels, where N is an integer equal to or greater than 3; a transmission chip suitable for transmitting first to (N?1)th signals through the first to (N?1)th channels and transmitting a correction signal generated by using the first to (N?1)th signals to the Nth channel; and a reception chip suitable for receiving signals of the first to Nth channels and generating restored signals of the first to Nth channels by using the first to Nth channels.

Abstract: Embodiments of the present invention provide a method and a device for decoding Polar codes. A reliable subset is extracted from an information bit set of the Polar codes, where reliability of information bits in the reliable subset is higher than reliability of other information bits. The method includes: obtaining a probability value or an LLR of a current decoding bit of the Polar codes; when the current decoding bit belongs to the reliable subset, performing judgment according to the probability value or the LLR of the current decoding bit to determine a decoding value of the current decoding bit, keeping the number of decoding paths of the Polar codes unchanged, and modifying probability values of all the decoding paths by using the probability value or the LLR of the current decoding bit.

Abstract: A packet data transmitting method and mobile communication system using the same enables transmission of common ACK/NACK information from each sector of a base station to a user entity in softer handover. The method includes receiving via at least one of the plurality of sectors a data packet from the mobile terminal, the data packet being correspondingly received for each of the at least one of the plurality of sectors; combining the correspondingly received data packets, to obtain a signal having a highest signal-to-noise ratio; decoding the value obtained by the combining; determining a transmission status of the data packet according to the decoding; and transmitting to the mobile terminal a common ACK/NACK signal including one of a common ACK signal and a common NACK signal according to the determining, the common ACK/NACK signal being transmitted via each of the at least one sector.

Abstract: A system and method for processing a block Low Density Parity Check (LDPC) code are provided. The system includes, a decoding apparatus for decoding a block LDPC code using a parity check matrix, the parity check matrix including an information part and a parity part, the parity part including a first section (B) including a plurality of first permutation matrices, a second section (D) including a second permutation matrix, a third section (T) including a plurality of identity matrices (I) arranged diagonally within the third section and a plurality of third permutation matrices arranged below the plurality of identity matrices, and a fourth section (E) including a fourth permutation matrix.

Abstract: A storage control apparatus writes n pieces of data (here, n is an integer greater than 1) in a first memory apparatus, and reads the n pieces of written data from the first memory apparatus. A parity calculation unit calculates parity based on divided data extracted from each of the n pieces of data for each certain size, and stores the calculated parity in a second memory apparatus. A read control unit restores, in reading the n pieces of data from the first memory apparatus, at least one of the n pieces of data instead of reading it from the first memory apparatus but using other data having been read from the first memory apparatus among the n pieces of data and the parity stored in the second memory apparatus.

Abstract: The present invention provides various circuits for injecting faults into a larger circuit, sometimes called circuit under test, or CUT. One type of fault injection circuit is a clock controlled fault injection circuit. This type of circuit uses internal scan chains as a way by which a fault injection operation is performed while a system clock is in the off state. Another type of fault injection circuit is a concurrent fault injection circuit. This type of fault injection circuit uses dedicated fault injection scan chains in parallel with or without internal scan chains. Yet another type of fault injection circuit is a hybrid fault injection circuit that uses both clock controlled and concurrent fault injection circuits. Other embodiments are disclosed and still other embodiments would be obvious to those of ordinary skill in the art upon understanding the full scope of the present disclosure.

Abstract: A method begins with a processing module of a centralized digital video storage (DVS) system storing, for playback, a plurality of sets of encoded data slices in storage units, where multi-media content is encoded to produce the plurality of sets of encoded data slices. The method continues with the processing module monitoring the storage units for a failure mode and monitoring a number of subscriber devices requesting playback of the multi-media content. The method continues with the processing module determining whether a sufficient number of unique combinations of a decode threshold number of encoded data slices per set of slices exists to service playback of the multi-media content. When the sufficient number of the unique combinations do not exist, the method continues with the processing module reassigning unique combinations of the decode threshold number of encoded data slices per set of encoded data slices to some of the subscriber devices.

Abstract: A method and a system for controlling a state machine are described. In the method, a script is used via which each arbitrary path in the state machine. The script is created using a language which includes the “data” command, the “data” command allowing reading and writing of data.

Abstract: The present invention provides for applying a cyclic redundancy check (CRC) to a data signal. The present invention includes attaching a first CRC to a first data signal block having a first length, segmenting the first data signal block attached with the first CRC into a plurality of second data signal blocks having a length shorter than the first length, respectively generating a second CRC for each second data signal block, and attaching the generated second CRC to the respective second data signal block. Moreover, the first CRC and second CRC may be generated from respectively different CRC generating polynomial equations.

Abstract: A data storage device includes a data storage medium, and an error correction code unit configured to process an error correction code for data to be stored in the data storage medium. The error correction code unit includes a storage block configured to store the data to be stored in the data storage medium, and an encoder configured to divide the data stored in the storage block into a plurality of data groups according to an address of the storage block, to encode the plurality of data groups, to encode a plurality of parity data groups that are generated by encoding the plurality of data groups, and to generate final parity data.

Abstract: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for use of a detector output by a data decoder. As an example, a data processing system is discussed that includes a data detector circuit operable to provide a first detector output and a second detector output, and a combining circuit operable to combine a first input derived from the first detector output with a second input derived from the second detector output to yield a combined detector output. The combined detector output includes a unified data set element generated by combining an element of the first input with a corresponding element of the second input.

Abstract: A digital broadcasting system and method of processing data are disclosed. Herein, a method of processing data in a transmitting system includes creating a data group including a plurality of mobile service data packets, re-adjusting a relative position of at least one main service data packet of a main service data section, the main service data section including a plurality of main service data packets, and multiplexing the mobile service data of the data group and the main service data of the main service data section in burst units. Herein, a position of an audio data packet among the main service data packets of the main service data section may be re-adjusted. Also, a position of an audio data packet included in the main service data section may be re-adjusted based upon a multiplexing position of the main service data section.

Abstract: Systems and methods are provided for selecting precisions during iterative decoding with a low-density parity check (LDPC) decoder in order to maximize LDPC code's performance in the error floor region. The selection of the precision of the messages may be done in such a way as to avoid catastrophic errors and to minimize the number of near-codeword errors during the decoding process. Another system and method to avoid catastrophic errors in the layered (serial) LDPC decoder is provided. Lastly, a system and method that select precisions and provide circuitry that optimizes the exchange of information between a soft-input, soft-output (SISO) channel detector and an error correction code (ECC) decoder for channels with memory is provided.

Abstract: Systems, methods, and apparatus are provided for improving the iterative decoding performance of a decoder, for example, as used in a wireless communications receiver or in a data retrieval unit. A decoding technique may receive and process a set of channel samples using an iterative decoder. If the iterative decoder output indicates a decoding failure, noise samples may foe combined with the received channel samples to create biased channel samples. Noise sample may be generated using a pseudo-random noise generator and/or by using signals already present in the communications receiver or data retrieval unit. The biased channel samples may be provided to the iterative decoder and the iterative decoder may re-run using the biased channel samples.

Abstract: A method of decoding an array of multi-dimensional code components, the method may include searching in a group of multi-dimensional code components a suspected multi-dimensional code component, wherein the suspected multi-dimensional code component belongs to the array multi-dimensional code components and is associated with a false correction probability that exceeds a false correction threshold; wherein the searching comprises dummy decoding, by a decoder, the group of multi-dimensional code components; and performing at least one non-dummy decoding of multi-dimensional code components of the array without performing non-dummy decoding of the suspected multi-dimensional code component.

Abstract: A method and system are disclosed for providing combined error code protection and subgroup parity protection for a given group of n bits. The method comprises the steps of identifying a number, m, of redundant bits for said error protection; and constructing a matrix P, wherein multiplying said given group of n bits with P produces m redundant error correction code (ECC) protection bits, and two columns of P provide parity protection for subgroups of said given group of n bits. In the preferred embodiment of the invention, the matrix P is constructed by generating permutations of m bit wide vectors with three or more, but an odd number of, elements with value one and the other elements with value zero; and assigning said vectors to rows of the matrix P.

Abstract: In a multi-antenna communication system using LDPC codes, a simple method is used to effectively improve the received quality by performing a retransmittal of less data without restricting applicable LDPC codes. In a case of a non-retransmittal, a multi-antenna transmitting apparatus transmits, from two antennas, LDPC encoded data formed by LDPC encoding blocks. In a case of a retransmittal, the multi-antenna transmitting apparatus uses a transmission method, in which the diversity gain is higher than in the previous transmission, to transmit only a part of the LDPC encoded data as previously transmitted. For example, the only the part of the LDPC encoded data to be re-transmitted is transmitted from the single antenna.

Abstract: The disclosure is directed to a system and method for storing and processing check-node unit (CNU) messages utilizing random access memory (RAM). A decoder includes a layered array of CNUs configured to receive at least one variable-node unit (VNU) message associated with decoded bits of at least one data segment being operated upon by the decoder. The decoder further includes a CNU message converter configured to permutate at least one initial circulant of the VNU message to generate a converted CNU message having sub-circulants sized for RAM-based processing. The decoder further includes RAM configured to store sub-circulants of the converted CNU message at addressable memory blocks for parallel VNU processing.

Abstract: A method of transmitting broadcast signals includes forward error correction (FEC) encoding mobile data; interleaving the FEC encoded mobile data; encoding signaling information for the mobile data; mapping the interleaved mobile data and the encoded signaling information into a data unit, wherein the data unit includes a first region and a second region, wherein the first region is concatenated with the second region, wherein the first region includes known data and the encoded signaling information, and wherein the second region includes known data and the encoded mobile data; and transmitting the broadcast signals including the data unit, wherein the data unit is multiplexed with a data unit of main data in a specific time period, wherein the signaling information includes information of the data unit having the interleaved mobile data.