235 results about "Systematic code" patented technology

A redundant file server includes at least two dual processor boards. Each physical processor has two logical processors. The first logical processor of the first physical processor of each board executes storage system code under the Microsoft NT(TM) operating system. The second logical processor of the first physical processor of each board executes control station code under the Linux operating system. The first logical processor of the second physical processor of each board executes data mover code. The second logical processor of the second physical processor of each board is kept in a stand-by mode for assuming data mover functions upon failure of the first logical processor of the second physical processor on the first or second board.

The universal forward error-correction coding system provides adjustable code rates and coding gains to greatly benefit the design of many modern digital communications (data storage) systems. The channel encoding and decoding methods are universal such that a single encoder and a single decoder can be used to implement all the forward error-correction codes of different code rates. This universal forward error-correction coding system also includes a novel systematic code generation procedure that has the capability of generating many classes of codes that provide the best balance between coding gain performance and implementation complexity.

The specification describes a two-dimensional symbol code for representing binary data, which symbol code is constructed from a plurality of graphical symbols arranged next to one another, wherein the symbol code is formed from precisely two different symbols having the same surface area which differ in their areal brightness distribution and each code a value from a binary data word. The symbols have a complementary brightness distribution. In a method for reading this two-dimensional system code, the system code has a filter applied to it which matches the brightness distribution of one of the two complementary symbols, wherein in the event of a match one symbol is recognized and in the event of no match the other symbol is recognized.

The present invention relates to a method for constructing LPDC code check matrix and encoding and decoding devices using the same. The encoding device encodes the inputted binary information and outputs the encoded system code sequence of position transformation. The encoding device comprises: a matrix multiplication module outputting a check sequence p which is obtained through the binary information sequence m multiplied with a matrix; a sorting index module having N memory units storing index values of a sorting table IDX in turn; and a sorting output module for sorting the m and p and outputting a code word c based on the index value stored in the sorting index table. The present invention constructs the LDPC code check matrix using an algebraic structure, obtaining the LDPC code with stable performance. In addition, the encoding and decoding devices of the present invention occupy less memory, which is preferable for optimization of the devices.

The invention relates to a method for designing systematic codes of an irregular low density parity check code and communication system thereof, wherein a semi-random generation method is employed to obtain a base check matrix, then each element of the basis matrix is expanded to a window pane sub-matrix, thus irregular LDPC code check matrix can be obtained, which first conducts pre-transformation to row/line weight distribution pattern when producing the Hb, and a specific matrix whose non-zero row/line element number is greater than 1 to create a systematic code to simplify the encoder arrangement.

A method of performing multiple operations on a flash memory device is described. This is made possible through the implementation of multiple partitions within the flash memory. The partitions are used to store data, application code, and system code. Low level functions within the system code process the data and handle preemption functions within the flash memory.

A boot-up operation system is provided. In one exemplary embodiment, the system includes a CPU, a bootstrap memory, a boot memory, a main memory, an I/O port and CPU operating system code. When the system is turned on, the CPU executes the bootstrap program which directs it to determine whether the boot memory contains the necessary code to perform the boot-up operation. If the boot memory contents are usable for boot-up operation, the CPU starts executing a boot program that is stored in the boot memory. If the boot memory contents are not usable for boot-up operation, the bootstrap program directs the CPU to download a copy of the CPU operating system code from outside the system using the I/O port. After the download, the CPU stores a copy of the downloaded operating system code and the boot program into the boot memory for future use.

The invention discloses a single sign-on server. The single sign-on server comprises a memory and a processor; a single sign-on program which can be run in the processor is stored in the memory. Whenthe program is carried out by the processor, steps below are realized: obtaining a sign-on request sent from a client to the server based on a reorientation information sent by a service system; obtaining account information from the sign-on request, obtaining a system identifier of the service system and an associated white list from the reorientation information and judging whether account information exists in the white list; if so, verifying the account information and a password in the sign-on request; if the verification passes, returning token information to the client for storage and storing the token information after the token information is associated with the account information of the client. The invention also provides a single sign-on method and a computer readable storage medium. According to the single sign-on server, the single sign-on method and the computer readable storage medium, a system code amount is reduced, the system reusability is improved, and centralizedmanagement of each service system authority in the single sign-on system is realized.

A method for generating block codes from Golay code and a method and apparatus for encoding data are provided. The method can effectively generate codes having various lengths, various dimensions, and superior hamming weight distribution, and encodes data such as control information having various lengths into codes having strong resistance to channel errors, resulting in an increase of error correction performance.

The invention discloses a code generation method and apparatus. The method comprises the steps of performing semantic analysis on a physical data model (PDM) file to obtain a PDM file object; converting the PDM file object into a table directory tree, wherein the table directory tree comprises a table object corresponding to the PDM file object; displaying the table directory tree in a visual interface; determining a table object needed to be subjected to code generation in the visual interface, and performing table structure information configuration on the determined table object; configuring system parameters and system code templates, and configuring self-defined parameters and self-defined templates; filling a template group composed of the system code templates and the self-defined templates with the table structure information, the system parameters and the self-defined parameters to generate a preview code; and after the preview code is confirmed to be correct, generating foreground and background codes corresponding to the preview code. According to the code generation method and apparatus, the software program development efficiency can be improved, the development cost can be reduced, and the development cycle can be shortened.

A check matrix generation method for generating a check matrix H1 of a code H1 from a check matrix H0 of a code C0, where codes C0 and C1 are LDPC systematic codes having different encoding ratios in a rate-compatible relationship and information bit sizes of the systematic codes C0 and C1 are K, and parity bit sizes thereof are M0 and M1 (M1−M0=L) respectively. The method comprising steps of: selecting L number of rows out of the check matrix H0; separating an information bit portion and a parity bit portion constituting each of the selected rows into two respectively, such that each of the separated information bit portions includes one or more non-zero elements which are “elements different from 0”; creating a new first row by coupling one separated information bit porting and one separated parity bit portion and creating a new second row by coupling another separated information bit portion and another separated parity portion; and generating the check matrix H1 of the systematic code C1 by placing the new first and second rows in place of each of the selected L number of rows in the check matrix H0.

The invention discloses a cross-domain single sign-on method for system integration. The method comprises steps: 1) when a user firstly accesses a subsystem, proxy service intercepts the request and jumping to a unified sign-on interface is carried out; 2) the user fills information such as the username and the password in the sign-on interface; 3) a single sign-on server verifies the user information, and a unique authorization code is generated; 4) a simulated sign-on mode is used to send the authorization code and the sign-on information to all systems; and 5) when the user uses the authorization code to access the system or other systems again, sign-on again is not needed. The cross-domain single sign-on method for system integration has the advantages that the configuration is simple; the original system code is not invaded; seamless access to systems crossing domains and distributed under multiple domain names can be realized, and the method is applicable to a high-concurrency scene, and supports a time-limiting sign-on-free feature.

A method and apparatus for performing encoding and decoding of bit chain data packets conveying errors which do not spread on more than n bits, at very high speed. In one embodiment, a matrix of the corresponding Systematic code is built using p×p matrix blocks comprising elements of a galois field, generated by an irreducible generator polynomial of degree p, p being greater or equal to n.

The invention provides an account checking system and method. A first configuration module sets an account checking information import template for configuration of a user and extracts first account checking information corresponding to configuration information from a target account checking data source according to the input configuration information, the first account checking information includes multiple pieces of bill information, and each piece of bill information includes payment serial number information, order information, transaction amount information, transaction date information and a transaction company. A second configuration module is used for extracting second account checking information corresponding to the first account checking information from a reference account checking data source. A matching module is used for matching of the first account checking information and the second account checking information and transmitting matching failure information to a display module to display the matching failure information when matching of a certain piece of bill information in the first account checking information and the bill information in the second account checking information fails, and the matching failure information includes the payment serial number information of the bill information. Real-time configuration and real-time application can be realized without modifying the system code level.

The invention discloses a system boot method and apparatus. The method comprises the steps of loading a system boot mirror image in an SD password card after a system is powered on, and loading a system code mirror image according to the system boot mirror image; calculating the system code mirror image to obtain a calculated hash value, and meanwhile, decrypting a signed hash value attached to the system code mirror image through a first public key stored in the SD password card to obtain a decrypted hash value; and judging whether the calculated hash value is the same as the decrypted hash value or not, and if yes, executing the system code mirror image. By implementing the system boot method and apparatus, the verification of the system code mirror image of each stage in a terminal is realized, the effect of preventing the tampered system code mirror image from being executed is achieved, and the effect of security verification is achieved in a system boot process, so that the security of the terminal and data information stored in the terminal is improved.

A method and system are disclosed. In one embodiment, the method includes invoking a run-time measurement agent (RTMA) to run on a trusted platform, the RTMA measuring a core system code block multiple times after a single boot on the trusted platform; and a trusted platform module storing these multiple measurements.

The embodiment of the invention discloses a protective method for a software program. The method presets a virtual system instruction set; a software virtual system which can run the instruction of the virtual system instruction set is constructed; the software virtual system runs on a computer and provides a part of running environment to the software program; before the software program is executed, a program source code needing protection in the software program is converted into a virtual system instruction according to the virtual system instruction set to obtain an object code comprising a virtual system code segment; when the object code is executed, the software virtual system is used for interpretive execution in the virtual system code segment. The embodiment of the invention also provides a dictate converter and the software virtual system. The technical proposal of the invention makes it hard for a software cracker to actualize the reverse process such as disassembly or decompiling, thereby effectively protecting the software program.

Embodiments of the subject invention relate to systems, methods, and devices providing a reduced number of selectable inputs that enable efficient communication. One aspect of what is disclosed are embodiments of a systematic code, which systematic code enables efficient communication. Another aspect of the invention is the implementation of embodiments of a systematic code on interactive devices, thereby enabling efficient communication using such interactive devices.