448results about How to "Improve read performance" patented technology

Systems and methods for configuring a RFID tag reader based upon one or more aspects of an environment of the RFID tag reader are disclosed. In one embodiment, a tag reader is deployed into an environment that includes readable RFID tags capable of storing dynamic data, and a characteristic of the environment of the tag reader is identified. Based upon the identified characteristic, the configuration of the tag reader is adjusted. In variations, the tag reader is configurable based upon information received from RFID tags. In another embodiment, a configurable RFID tag reader includes a processing portion that sends a first signal to each of a plurality of RFID tags. The processing portion receives information from at least one of the plurality of RFID tags, and adjusts a configuration of the RFID tag reader based upon at least a portion of the information.

The present invention relates to a fine-granularity files and directory edition management method based on snapshots, belonging to the multi-version document system field. The present invention separates a name space consisting of files and dirnames in a whole file system from an edition space representing the generating periods of different editions, and adopts relatively independent strategies to execute management, forming a hierarchical two-dimensional structure, i.e. forming a hierarchical structure from a root directory to a file in the name space; in the edition space, the editions of files and directory are organized through an index structure chronologically, forming a hierarchical structure in the edition space. The retrieval of the name space adopts an index strategy based on dynamic hash. The retrieval of the edition space adopts an index strategy based on a red-black tree. The directory edition and file edition respectively adopt a red-black tree structure variant aiming at the respective characteristics. The present invention can greatly improve the usability and the performance of the system, and controls the amount of consumption of time and space resulting from the maintenance of historical editions in an acceptable scope.

A method of storing a file in a memory. An explicit command is issued to a file system to store the file in accordance with a desired performance characteristic of the file such as enhanced write performance, enhanced read performance or enhanced latency performance. The file system stores the file in the memory in accordance with the desired performance characteristic. Preferably the desired performance characteristic is achieved by storing the file in a physically contiguous portion of the memory or in a logically contiguous portion of the memory. After the explicit command has been issued for each of a plurality of files, the files may be stored concurrently.

A method and system are disclosed for handling logical-to-physical mapping in a storage device. The method includes the storage device storing in fast access memory, such as DRAM, only a fixed-size subset of the primary mapping table in non-volatile memory, along with contiguity information of physical addresses for logical address not in the subset that are adjacent to the logical addresses in the subset. The system includes a storage device having volatile memory, non-volatile memory and a controller in communication with the volatile and non-volatile memory that is configured to carry out the method noted above.

Improving a process in which information is read, modified, and written, and in which reading information is more costly (e.g., slower) than writing information. The information may be pixel information from a second (or remote) image and the modification may be a blending operation with a first (or local) image. The pixel information of the second (or remote) image may be stored in a video display frame buffer at a display adapter. The display adapter may be coupled via a bus, such as a PCI bus for example, with a CPU (or other machine) which performs the modification, such as image blending for example. This process is improved by limiting the number of reads of the pixel information of the second (or remote) image. Further, reads may be combined when doing so improves read performance and when alignment conditions are met. All modify and all or some write steps may be performed after all read steps have been performed, rather than performing all three (3) steps on a pixel-by-pixel, or pixel vector-by-pixel vector basis.

Aspects of the present invention provide high-performance indexing for data-intensive systems in which “slicing” is used to organize indexing data on an SSD such that related entries are located together. Slicing enables combining multiple reads into a single “slice read” of related items, offering high read performance. Small in-memory indexes, such as hash tables, bloom filters or LSH tables, may be used as buffers for insert operations to resolve slow random writes on the SSD. When full, these buffers are written to the SSD. The internal architecture of the SSD may also be leveraged to achieve higher performance via parallelism. Such parallelism may occur at the channel-level, the package-level, the die-level and / or the plane-level. Consequently, memory and compute resources are freed for use by higher layer applications, and better performance may be achieved.

Systems and methods for configuring an RFID tag reader based upon one or more aspects of an environment of the RFID tag reader are disclosed. In one embodiment, a tag reader is deployed into an environment that includes readable RFID tags capable of storing dynamic data, and a characteristic of the environment of the tag reader is identified. Based upon the identified characteristic, the configuration of the tag reader is adjusted. In variations, the tag reader is configurable based upon information received from RFID tags. A method for enhancing RFID tag reading performance for example includes sending a first signal to each of a plurality of RFID tags. Information is received from at least one of the plurality of tags, at an RFID tag reader, and a configuration of the tag reader is adjusted based upon at least a portion of the received information.

A flash memory device comprises an array of memory cells arranged in rows and columns and a word line voltage generating circuit adapted to generate a plurality of read voltages at the same time during a multi-bit read operation. The device further comprises a row selecting circuit adapted to select one of the rows and drive the selected row with a word line voltage, and voltage lines transmitting the respective read voltages to the row selecting circuit as the word line voltage. The read voltages are supplied to the respective voltage lines before starting read periods of the multi-bit read operation.

A method for rating an information recording medium according to the present invention includes the steps of: receiving a digital read signal, which has been generated based on an analog read signal representing information that has been read from the information recording medium, and shaping the waveform of the digital read signal; subjecting the shaped digital read signal to maximum likelihood decoding, thereby generating a binarized signal showing a result of the maximum likelihood decoding; and calculating the quality of the digital read signal based on the shaped digital read signal and the binarized signal. If the quality of the read signal is calculated by a PRML method in which a number of zero-cross portions are included in a merging path of a minimum difference metric, the quality is calculated by using only a state transition pattern in which only one zero-cross portion is included in a merging path of a non-minimum difference metric.

An electro-optical imaging reader includes a chassis mounted in a housing, a window spaced from a rear wall of the chassis, an imaging module for capturing return light from a target through the window over an imaging field of view, a controller for operating the reader in a standby state in which no target is read, and for processing the captured return light to read the target during a reading state, and an object sensing assembly supported by the rear chassis wall and spaced from the window. The object sensing assembly senses the presence of an object bearing the target in front of the window by detecting return sensing light from the object through the window over a sensing field of view that at least partially overlaps the imaging field of view, and triggers the controller to change from the standby state to the reading state upon such detection.

The embodiment of the invention provides a file merging method and device. The file merging method comprises the steps of carrying out partitioning on sections in the charge of nodes in a cluster system according to key value information of user data, determining that each node meets a first triggering condition, reading at least two first files from disks of the nodes to caches corresponding to the nodes, respectively determining the target partition which each key value belongs to according to the key values of the data, corresponding to users, stored in the first files, merging the data with the same key value, and storing the merged data corresponding to the key values into the corresponding target partitions. Partitioning is carried out on the sections in the nodes, the data are merged once, and the data with the same key value are stored in the same partition. In the inquiry process, the partitions where the data are located are determined according to the key values, and then the files in the partitions are scanned. As the number of the files in each partition is small, data screening only needs to be carried out on fewer files, and therefore the read performance is improved.

A memory device includes an array of memory cells arranged as a plurality of rows and columns, each row being coupled to an associated read word line, and each column forming at least one column group, where the memory cells of each column group are coupled to an associated read bit line. Each column has an active mode of operation where a read operation may be performed on an activated memory cell within that column group, and a non-active mode of operation where the read operation is not performable. Precharge circuitry is used, for each column group, to precharge the associated read bit line to a first voltage level prior to the read operation. Each memory cell includes coupling circuitry connected between the associated read bit line and a reference line associated with the column group containing that memory cell.

Method and apparatus for building large memory-resident hash tables on general purpose processors. The hash table is broken into bands that are small enough to fit within the processor cache. A log is associated with each band and updates to the hash table are written to the appropriate memory-resident log rather than being directly applied to the hash table. When a log is sufficiently full, updates from the log are applied to the hash table insuring good cache reuse by virtue of false sharing of cache lines. Despite the increased overhead in writing and reading the logs, overall performance is improved due to improved cache line reuse.

A mass storage device having at least one flash memory device and DRAM or SRAM-based cache within a package, and which comprises co-processor means within the package for performing compression and decompression of cached data before writing the cached data to the flash memory device.

This invention advances a kind of general slow storage method which is used to fetch the storied data in the slow storage. In that includes: step one, in the slow storage sets up an interface used to fetch the external data connecting with the external data source; step two, separate the slow storage area into multiple slow storage sector and storage one data only in one slow storage sector and then locate the names for every slow storage sector and the data main key value; step three, when the slow storage system receiving the data access request call on the corresponding slow storage sector according to the request access slow storage sector's name and data main key value and then judge the slow storage sector whether storied the request data if it had storied it would output the request data and if not it would fetch the request data from the external data source through the interface and preserve the request data at the slow storage sector and then output it.

A subscriber identity module (SIM) card includes: a printed circuit board; a circuit provided on the printed circuit board and capable of executing SIM and RFID functions; a set of circuit contacts provided on the printed circuit board, electrically connected to the circuit via conductive paths, and conforming to a SIM specification; a set of antenna contacts provided on the printed circuit board and electrically connected to the circuit via conductive paths; and a protective plate fixed to the printed circuit board and conforming to standard dimensions of the SIM card. An assembly of the SIM card and a RFID antenna is also disclosed.

An error correction circuit, an error correction method, and a semiconductor memory device including the error correction circuit are provided. The error correction circuit includes a partial syndrome generator, first and second error position detectors, a coefficient calculator, and a determiner. The partial syndrome generator calculates at least two partial syndromes using coded data. The first error position detector calculates a first error position using a part of the partial syndromes. The coefficient calculator calculates coefficients of an error position equation using the at least two partial syndromes. The determiner determines an error type based on the coefficients. The second error position detector optionally calculates a second error position based on the error type. The semiconductor memory device includes the error correction circuit, an error checking and correcting (ECC) encoder generating syndrome data based on information data and generating the coded data by combining the syndrome data with information data, and a memory core storing the coded data. Multi-bit ECC performance is maintained and ECC for a predetermined (1 or 2) or less number of error bits is quickly performed.

Read-assist circuits for memory bit cells employing a P-type Field-Effect Transistor (PFET) read port(s) are disclosed. Related memory systems and methods are also disclosed. It has been observed that as node technology is scaled down in size, PFET drive current (i.e., drive strength) exceeds N-type FET (NFET) drive current for like-dimensioned FETs. In this regard, in one aspect, it is desired to provide memory bit cells having PFET read ports, as opposed to NFET read ports, to increase memory read times to the memory bit cells, and thus improve memory read performance. To mitigate or avoid a read disturb condition that could otherwise occur when reading the memory bit cell, read-assist circuits are provided for memory bit cells having PFET read ports.

The invention discloses a fragment rewriting method for a data repetition removing system. A cache as a rewriting sensing cache is added in data removing; data items in the rewriting sensing cache are container identifications referenced by a data block; and if the container identifications referenced by the data block which is confirmed as a data fragment are stored in the rewriting sensing cache, data are not required to be rewritten, or else, the data fragment is required to be rewritten. According to the fragment rewriting method, the cache of which the time is the same with the reading time of the data and the cache strategies are the same is added in the data repetition removing process, unnecessary repeated data block rewriting is avoided, and the shortcoming of the existing arithmetic is overcome. Compared with the existing fragment removing arithmetic, the fragment rewriting method has the advantages that influence on reading performance due to the data fragment is reduced, and the reading performance is improved by rewriting the data fragment; and less repetition rate loss is guaranteed while the reading performance is improved.

A memory cell array is physically divided into an even number of sectors, with each pair of sectors sharing read circuitry. The outputs of the shared read circuitry are commonly connected to form data lines spanning the height of the array, which are input to global sense amplifiers. A two-stage sensing scheme is employed, with first stage and global sense amplifiers. The driving capability of the first stage sense amplifier can be used to decrease the time to charge or discharge the data lines, which reduces the total signal development time and consequently improves read performance. Granularity of the array can be adjusted by dividing groups and sub-groups of memory cells within a sector accordingly. In a read operation, the bit line in the opposite sector at the same column location is used as reference bit line, which greatly improves matching of bit line loading for the sensing.

The invention discloses a distributed video monitoring storing system and a method thereof and relates to a distributed storage technology and a video monitoring technology. The system comprises a local region unit (000), a first other region unit (100), a second other region unit (200)... and an N region unit (N00), and the units are mutually communicated through network elements in the units; the structure of the local region unit (000) and structures of the other region units are the same; the local region unit (000) comprises a video monitoring front end (010), a network element (020), a video monitoring platform (030) and a video storing node (040); the video monitoring front end (010), the video monitoring platform (030) and the video storing node (040) are connected with the network element (020) respectively. By means of the distributed video monitoring storing system and the method thereof, video storing and reading performances are improved, storing space and business balance of video storing nodes in region units can be guaranteed, and usability and performances of the distributed storing system can be improved.

An arrangement for, and a method of, reducing image blur in response to motion of an imaging reader for imaging symbols to be read, employs an illuminating light assembly supported by the reader for illuminating a symbol with illumination light having an intensity level over an illumination time period, a solid-state imager supported by the reader and having an array of image sensors for capturing return light from the symbol over a field of view over an exposure time period, a motion sensor, such as a gyroscope or an accelerometer, supported by the reader for detecting the motion of the reader, and for generating a motion signal in response to the detected motion of the reader, and a controller operatively connected to the motion sensor, for dynamically controlling at least one of the time periods and the intensity level in real time in response to the motion signal to optimally image the symbol.

A substantially uniform distributed illumination pattern of light is generated on and along a symbol to be read by image capture. A solid-state imager is mounted on a tilted printed circuit board in a tilted handle of an ergonomic reader. An imaging lens assembly captures return light over a field of view from the symbol along an imaging axis, and projects the captured return light onto the imager. An illumination light source is mounted on the board for emitting illumination light at an acute angle of inclination relative to the imaging axis. An optical component includes a first lens portion with a polynomial incident surface for intercepting, bending and aligning the emitted illumination light to generate the pattern in a scan direction along the symbol, and a second lens portion with a toroidal or cylindrical aspherical surface for collimating the aligned illumination light to generate the pattern in a transverse direction.

A subscriber identity module (SIM) card includes: a printed circuit board; a circuit provided on the printed circuit board and capable of executing SIM and RFID functions; a set of circuit contacts provided on the printed circuit board, electrically connected to the circuit via conductive paths, and conforming to a SIM specification; a set of antenna contacts provided on the printed circuit board and electrically connected to the circuit via conductive paths; and a protective plate fixed to the printed circuit board and conforming to standard dimensions of the SIM card. An assembly of the SIM card and a RFID antenna is also disclosed.

A prefetch control apparatus includes a prefetch controller for controlling prefetch of read data into a cache memory caching data to be transferred between a computer apparatus and a storage device, and which enhances a read efficiency of the read data from the storage device, a sequentiality decider for deciding whether the read data that are read from the storage device toward the computer apparatus are sequential access data, a locality decider for deciding whether the read data have locality of data arrangement in the predetermined storage area, in a case where the read data that are read from the storage device toward the computer apparatus have been decided not to be sequential access data, and a prefetcher for prefetching the read data in a case where the read data has the locality of the data arrangement.

The combination of a rooftop optical element and a soft edge aperture stop, as well as the introduction of a negative spherical aberration in a positive focusing lens, improve working distance and depth of focus in both moving beam and imaging readers for electro-optically reading indicia such as bar code symbols, especially for close-in symbols, and moreover tend to reduce undesirable light intensity modulation in the beam profile thereby improving reader performance.

The invention provides a novel organization mode of single-scene image tile data. Particularly, emphasis is laid on storing each tile data continuously, resampling to image data and randomness of a data reading position in a reading process of the tile data are reduced, and the reading efficiency of the tile data is improved, so that time consumption of map tilt rendering is reduced greatly, and real-time dynamic rendering of mass data is ensured. The organization mode comprises the steps of selecting a global geographical reference grid multilevel-division single-scene image, constructing a quadtree storage structure of the image tile data, reading the image data (retaining primitive attributes such as the band number of the data, and bit depth) within a geographical range of tiles for each division tile, forming the complete and continuous tile data, compressing and storing the tile data in a hard disk file, adopting the multilevel tile data of a quadtree structure organization image, and ensuring efficient retrieval and reading of the tile data.

The invention relates to a combined data compression algorithm based on effect optimization. The combined data compression algorithm comprises the following steps of forming a compression algorithm set by selecting multiple compression algorithms according to to-be-compressed data types, main characteristics and / or time limiting factors, and obtaining an average decompression speed Di of decompression algorithms to which the multiple compression algorithms correspond; analyzing to-be-compressed data requirements, dividing to-be-compressed data into multiple data blocks, and obtaining public parameters of a computer system; calculating the compression effect values of the multiple compression algorithms used by each data block; comparing the compression effect values of the multiple compression algorithms, and selecting the algorithms with smallest compression effect value as optimal algorithms; implementing data compression calculation according to the optimal algorithm to which each data block corresponds. According to the combined data compression algorithm based on the effect optimization, the advantages of the multiple compression algorithms are fused; meanwhile, the influences of data reading speeds and disk space resources are considered; the data compression effect can be furthest improved, and the performance of practical data reading can also be improved.