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147results about How to "Reduce the number of reads and writes" patented technology

Method and system for data caching of solid state disk

The invention is applied to the technical field of storage, and provides a method and system for data caching of a solid state disk. The method for the data caching of the solid state disk comprises the following steps: setting a part of memory of a system memory as a data buffer cache of the solid state disk; caching read and write data of the solid state disk into the data buffer cache of the solid state disk. Therefore, the method and system of the data caching of the solid state disk reduces the visit times of the solid state disk and lengthens the service life of the solid state disk.
Owner:RAMAXEL TECH SHENZHEN

Network television direct broadcasting system

The invention provides a network television direct broadcasting system. The system comprises a streaming media signal acquisition server, a streaming media signal receiving server and a streaming media content transmitting server, wherein the streaming media signal acquisition server is used for acquiring the original streaming media signal from a program signal source in real time and generating a streaming media direct broadcasting file by coding; the streaming media signal receiving server is used for acquiring the streaming media direct broadcasting file from the program signal source in real time and buffering streaming segments; the buffering of the streaming segments is to establish an index for each key frame of the streaming media direct broadcasting file; and the streaming media content transmitting server is used for acquiring the streaming media direct broadcasting file from the streaming media signal receiving server and transmitting the streaming media direct broadcasting file to a network player for playing in real time. The system has the functions of direct broadcasting, playback, multi-screen signal acquisition, code optimization, multi-rate coding, automatic cutting, multi-packet transmission and the like.
Owner:CHINA DIGITAL VIDEO BEIJING

Method and device for acceleratively starting operating system, and method, device and terminal for generating prefetched information

The invention discloses a method and a device for acceleratively starting an operating system and a method, a device and a terminal for generating prefetched information, and belongs to the field of operating systems. The method for acceleratively starting the operating system includes acquiring at least one piece of prefetched information, which contains file paths of data blocks required by a process, deviation values and length values, of the to-be-accelerated process in a starting procedure of the operating system; and setting positions which are indicated by the file paths and the deviation values as starting positions according to the prefetched information, reading the data blocks with the reading lengths equal to the length values into a cache of the system, and completing the starting procedure of the process by the aid of the data blocks in the cache of the system. By means of prefetching the data blocks required by the integral or partial process in the starting procedure, frequency of page faults in the starting procedure and read-write frequency for a low-speed memory are greatly reduced, starting time of each process corresponding to a program can be effectively shortened, and the effect of remarkably increasing the starting speed of the operating system is achieved.
Owner:TENCENT TECH (SHENZHEN) CO LTD

Switching system routing table management method

The method includes procedures: (1) establishing hash table on software layer; the hash table records indexes for list items of each route; (2) looking up the hash table to obtain needed index of list item; (3) based on having looked indexes of list items of routes to search route table of hardware; based on searched result to carry out deletion or insertion. Maintaining a hash table of recording indexes for list items of each route through software, when looking up, inserting, or deleting list items of route, the invention first obtains indexes for list items of the route in corresponding TCAM table through looking up hash table in software; and after having looked the corresponding list item, the invention prevents reading list item of hardware route item by item in each time. Through reducing time to read / write route item of hardware, the invention raises performance of system, and lowers cost.
Owner:ZTE CORP

LDPC (low density parity code) layering BP (belief propagation) decoding algorithm based on least-mean-square-error criterion and decoder structure

The invention discloses an LDPC (low density parity code) layering BP (belief propagation) decoding algorithm based on a least-mean-square-error criterion. In the algorithm provided by the invention, the complexity of algorithm implementation is reduced through constructing a linear equation to approach to the operational formula at a check node in the BP algorithm, and the decoding performance of the algorithm is improved by utilizing the least-mean-square-error criterion to solve the optimum solution of a linear equation coefficient. Simultaneously a layering decoding idea is introduced into the algorithm, the convergence of the algorithm can be improved, and the requirement on the memory space is reduced. Based on the algorithm, the invention provides a LDPC decoder structure provided with a partial parallel structure and used for a multimedia wireless sensing network. The decoder supports the decoding of the LDPCs with various code lengths and code rates, and has the advantages ofless system resource occupation, high data throughput, low system power consumption, and the like.
Owner:SOUTHEAST UNIV

Solid-state drive device and data read-write method based on solid-state drive device

The embodiment of the invention discloses GNSD (Global Navigation Satellite System) solid-state drive equipment and a data read-write method based on the same, and the solid-state drive equipment comprises a flash memory for storing first data, an SSD DRAM used for storing the mapping table and the second data; a DRAM translation layer (DTL) used for controlling access to the SSD DRAM; a controller used for determining that the read data is stored in the SSD DRAM and / or the flash memory according to the mapping table when the host reads the data and also used for storing the written data intothe SSD DRAM or the flash memory according to the number of the available DRAM entries in the mapping table when the host writes the data. By adopting the method and the device, the writing and erasing times of the flash memory can be effectively controlled, so that the durability of the flash memory is improved.
Owner:INFOMICRO ELECTRONICS SHENZHEN

Coding and decoding circuit of super high frequency radio frequency personal identification system

The invention discloses a coding and decoding circuit for a system of ultra-high frequency radio frequency identification (UHF RFID). Every time when error codes are found, the coding and decoding circuit based on the prior cyclic redundancy check (CRC) circuit resends, thus frequency of communication between a reader-writer and a tag can be increased in the situation of long distances of reading and writing and serious noise interference. If the speed of reading and writing is definite, time for successfully reading once is certainly extended, thereby influencing practicability and reliability of the UHF RFID system in the situation of reading and writing at high speed. To solve the problem, the invention is provided with a convolution error correcting code, adopts concatenation connection with the CRC circuit to reduce frequency of reading and writing, so as to improve the successful reading rate of the system in certain time. The CRC circuit of the invention is a parallel circuit with compact conformation and fast arithmetic designed based on FPGA, thereby further reducing time of communication between the reader and the tag, and increasing the amount of tag identification in unit time.
Owner:HUNAN UNIV

Magnetic disc data protection method

The invention discloses a magnetic disc data protection method, which comprises: receiving a magnetic disc operation request, and counting the degree of access heat of a requested vector; when the degree of the access heat of the requested vector meets a hot point requirement, copy is unavailable and the free space of the magnetic disc is greater than a preset free space threshold, generating a copy of the requested vector; and when the data in the requested vector and the data in the copy of the requested vector are consistent during reading and writing operation, selecting a vector which is at the shortest distance to the current position of a magnetic head for operation, or when the data in the requested vector and the data of the copy of the requested vector are inconsistent, selecting the vector with the latest data from the two vectors for operation. When the hot vector or the copy of the hot vector has a fault, data in a mirror sector are used for restoring the failed vector. In the invention, the fault probability of the hot vector is reduced by reducing the reading and writing times of the vector and the reliability of the data in the hot vector is guaranteed; meanwhile, while the system request is responded to, the data at the shortest distance to the magnetic head are fed back, so higher reading and writing performance are provided.
Owner:HUAZHONG UNIV OF SCI & TECH

Index combining method and index combining device

The invention discloses an index combining method and an index combining device. The index combining method comprises the following steps: determining whether not less than n sub-indexes of which the sizes meet preset combining conditions based on a preset reference exist in an index base or not, wherein n is an integer and is greater than or equal to 2, and the preset reference is related to thesizes of the preset sub-indexes; if the sub-indexes exist, taking the determined sub-indexes as a sub-index set; if the sub-indexes in the sub-index set are combined, computing the sizes of new sub-indexes to be acquired; searching not less than m sub-indexes of which the sizes meet the preset conditions based on the reference related to the sizes of the new sub-indexes in residual sub-indexes, wherein m is the integer and is greater than or equal to 1; if the sub-indexes are searched, adding the searched sub-indexes into the sub-index set, and executing the computing step and the searching step to the new sub-index set; and if the sub-indexes are not searched, combining the sub-indexes in the sub-index set. The method and/or the device of the invention can be used for obtaining relatively stable optimized system performance under dynamic text set environment.
Owner:FUJITSU LTD

Original and accompaniment switching method and device

The invention provides an original and accompaniment switching method and device. The method comprises the following steps: after a first switching command input by a user through a touch screen in a KTV (Karaoke Television) is received, audio equipment is controlled to only play a first audio track corresponding to the first switching command, and the audio equipment is controlled to only play a second audio track corresponding to a second switching command after the second switching command input by the user through the touch screen in the KTV is received to switch an original and an accompaniment. Since a KTV set top box only obtains one music file, i.e. a video file, corresponding to a current playing task, the original and the accompaniment can be switched through switching of different audio tracks, so that the original and accompaniment switching method only needs to read and write a hard disk where a song library is stored for one time, hard disk reading and writing frequencies are reduced, and the service life of the hard disk is prolonged. In addition, since one song file is read from the hard disk where the song library is stored, the occupancy rate of transmission bandwidth is lowered so as to lighten the intranet transmission burden of the KTV.
Owner:BEIJING LUOHA TECH

Blocking storage system of video monitoring data

The present invention provides a blocking storage system of video monitoring data. The system is characterized by comprising: a memory used for storing video monitoring data and provided with a continuous storage space; a data block conversion unit, used for dividing each-path data of multi-path video monitoring data into at least one data block, and communicating with the memory in a unit of data blocks; and a serial communication unit, used for storing the data blocks into the continuous storage space sequentially in a serial communication manner or reading the data blocks from the continuous storage space. According to the storage system of the video monitoring data provided by the present invention, the problems of lowering read / write efficiency of a disk and reducing service life of the disk, which are caused by keeping moving a head of the disk to perform a positioning write operation by a parallel processing mode of the disk when multi-path videos are written, are avoided.
Owner:四川奇迹云科技有限公司

Data fragmentation transmission method and device and computer equipment

PendingCN112632008ASolve the problem of poor throughputImplement logical mergingFile access structuresSpecial data processing applicationsFile allocationEngineering
The invention discloses a data fragmentation transmission method and device and computer equipment, and the method comprises the steps: respectively distributing a unique identification code for each target fragmentation file; according to the unique identification code of each target fragmentation file, obtaining meta attribute information of each target fragmentation file; determining an original arrangement sequence of each target fragment file according to the meta-attribute information; when a fragment merging request is received, generating a merged meta-attribute information list according to the original arrangement sequence and the meta-attribute information of each target fragment file. By implementing the method and the device, the problem that the throughput capacity of the server is poor due to the fact that the data read-write frequency is high in the related technology is solved, logic combination of the fragmented files is realized by combining the unique identification codes allocated to the fragmented files and the generated combined element attribute information list, a new file does not need to be generated by splicing, the seriality during file uploading can be ensured, the operation steps are simplified, and the data throughput capacity of the server and the user experience are improved.
Owner:HUALU OPTICAL STORAGE RES INST DALIAN CO LTD
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