47results about How to "Fast decompression" patented technology

The invention presents new methods of compression, transmission, and decompression of video signals providing increased speed and image quality and for protecting against camcorder piracy. Methods based on selecting an anchor frame, wavelet transformation with decimation and time stamping can provide one-pass encoding of signals in which the amount of bits of information needed to be transmitted can be substantially reduced, thereby increasing the speed of transmission of digital signals over networks. Decompressing signals, along with interpolation methods to re-create portions of images of lesser importance in visual perception, can provide coordinated video and audio presentations of high quality in real-time over all kinds of networks and frame interpolation resulting in a displayed frame rate significantly higher than 30 fps. The use of randomly selected anchor frames can render reconstructed transmitted images of poor quality for pirates who do not have access to identities of anchor frames.

The invention provides methods for processing data compression and decompression. The method for processing data compression comprises the following steps of: acquiring a file size before the compression; dividing a file which is not compressed into n segment according to the file size before the compression, calculating an index table size, and setting an index table at a head position of a compressed file; and compressing all the segments sequentially, writing the compression data into the compressed file, and recording the initial positions of all the segments in the compressed file to record items. The method for processing data decompression comprises the following steps of: receiving a user request instruction; according to the user request instruction, calculating the segment numbers of the acquired data, and reading the initial positions in the index table; sequentially reading and decompressing the data of all the segments according to the initial positions of the acquired data; and returning the data which are requested by a user to an upper layer. During the compression process, manual intervention is not needed; and during the decompression process, decompression is carried out segment by segment according to the user request, so the decompression speed is fast.

The invention presents new methods of compression, transmission, and decompression of video signals providing increased speed and image quality. Methods based on wavelet transformation with decimation and time stamping can provide one-pass encoding of signals in which the amount of bits of information needed to be transmitted can be substantially reduced, thereby increasing the speed of transmission of digital signals over networks. Decompressing signals, along with interpolation methods to re-create portions of images of lesser importance in visual perception, can provide coordinated video and audio presentations of high quality in real-time over all kinds of networks.

The invention presents new methods of compression, transmission, and decompression of video signals providing increased speed and image quality and for protecting against camcorder piracy. Methods based on selecting an anchor frame, wavelet transformation with decimation and time stamping can provide one-pass encoding of signals in which the amount of bits of information needed to be transmitted can be substantially reduced, thereby increasing the speed of transmission of digital signals over networks. Decompressing signals, along with interpolation methods to re-create portions of images of lesser importance in visual perception, can provide coordinated video and audio presentations of high quality in real-time over all kinds of networks and frame interpolation resulting in a displayed frame rate significantly higher than 30 fps. The use of randomly selected anchor frames can render reconstructed transmitted images of poor quality for pirates who do not have access to identities of anchor frames.

The invention relates to a method for coding electronic books, electronic newspapers and electronic magazines with hyperlink. The method comprises the following steps of: firstly, processing text and graph typesetting information input by a user through a TTK-format electronic book editor to generate a TTK-format electronic book with hyperlink, processing the text and graph typesetting information input by the user according to a Json protocol to generate the TTK-format electronic book, and compressing and packing the TTK-format electronic book; secondly, utilizing the Internet to download the TTK-format electronic book of the first step to terminal equipment which is an electronic reader; and finally, reading the decoded TTK-format electronic book on the electronic reader by the user.

The invention discloses a software installation method and device. The method comprises the following steps: an installation program file in a software installation package is decompressed into a memory, wherein the software installation package comprises an installation program file for guiding an installation program and a compressed program file; the compressed program file comprises other program files except the installation program file in the software installation package; the installation program file is operated to decompress the compressed program file in the software installation package into an appointed position; a main software program which is decompressed from the software installation package is started; meanwhile, the installation program file enters into the backstage to continuously guide software installation until the installation of all program files in the software installation package is accomplished. By adopting the method and the device, the problems that the process of software installation is lengthy and complex and the installation takes a long time are solved.

The present invention relates to a method and system for rendering real-time video based on OpenGL. The method comprises the following steps: using FFMPEG to write a decoding library of H264 data in the operating system of the GPU; initializing the size of the YUV window in the GPU; transmitting the network in real time The H264 data is decoded in the decoding library, and the decoded H264 data is decompressed according to macros and variables to obtain YUV data, and the YUV data is sent to the initialized YUV window; the initialized YUV is rendered on the screen by calling OpenGL The YUV data in the window, and display the video frame corresponding to the YUV data according to the defined width and height of the video frame in the YUV window. The invention reduces the utilization rate of the CPU and solves the problem of hot smart devices; at the same time, because OpenGL is used for rendering, the time for rendering a frame is much faster than the time for converting pictures, so the delay is not obvious when viewed for a long time.

The invention discloses a method for processing data of a resource description framework. The method comprises the following steps of: (1) processing the data of the resource description framework by using a Hash algorithm to generate an N*3 matrix, wherein N is an integer of more than 1, and three columns of the matrix respectively represent a subject array, a predicate array and an object array; (2) determining a maximum value eidmax in the subject array and the object array and a maximum value pidmax in the predicate array; (3) establishing an associated matrix M of the data of the resource description framework, wherein the size of the associated matrix is (eidmax+1)*N, and initializing all bits of the associated matrix M to 0; (4) according to the matrix, setting a bit value in the associated matrix, and converting the data of the resource description framework; and (5) compressing the associated matrix M. By adoption of the method, a large number of data of the resource description framework can be efficiently stored.

An embedded device is hibernated by storing state data of the embedded device to a non-volatile data storage medium, and powering off the embedded device. The embedded device is later woken up in response to the detection of a wakeup event from a wakeup source. The state data stored in the RAM of the embedded device comprises one or more registers of a Central Processing Unit (CPU) of the embedded device, one or more registers of a system-on-chip (SOC) of the embedded device, and the system and applications code and data. Waking the embedded device comprises loading, from the non-volatile data storage medium, initial memory sections that are used to run a kernel of the embedded device. State data that is stored in the RAM of a system is compressed by dividing the RAM into a plurality of sections and independently choosing, for each section in the plurality of sections, a compression arithmetic. For each section, a compression arithmetic that has a high decompression speed is selected. The selected compression arithmetic is used to compress data in the section.

A fast data compression method approximating dynamic Huffman coding for applications with exteremely large data sets is disclosed. The method includes periodic regeneration of the Huffman coding tables and use of precomputed information to speed up encoding and decoding.

The embodiment of the invention provides a monochrome image compression method and device, a medium and electronic equipment. The monochrome image compression method comprises the following steps: acquiring the pixel information of a target image to be compressed; dividing multiple pixel points with the same color values and continuous addresses into pixel groups according to the pixel informationof the target image to obtain at least one pixel group; and sequentially storing the pixel data of the pixel groups and storing the pixel points of a non-pixel group in the pixel information to generate the compression data of the target image. Through the adoption of the technical scheme, the space can be saved, and the compression efficiency is improved.

The invention discloses an industrial time sequence data compression method and system. The method comprises the following steps: acquiring time sequence data of m acquisition points at n acquisition time points; forming an m * n sparse matrix delta(m * n) according to the collected industrial time series data; compressing the sparse matrix delta(m * n) by using a compression algorithm to obtain a data frame, wherein the data frame comprises a matrix head, content information of a matrix and a check value, and the matrix head comprises a matrix identifier with length and width, Huffman coding information, a reference timestamp and an acquisition time point difference value; sending the data frame and the Huffman coding information to a server; controlling the server to decompress the data frame according to the Huffman coding information to obtain decompressed data and timestamps of the data at different moments; and storing the timestamps and the corresponding decompressed data together according to the timestamps of the data at different moments. The method has the advantages that the purpose of efficiently and losslessly collecting and storing time sequence data can be achieved.

The invention relates to a chip excitation method, a chip excitation device, a chip excitation system, computer equipment and a storage medium and belongs to the technical field of integrated circuittests. The method comprises the following steps of decomposing compressed excitation data into a plurality of pieces of data to obtain a plurality of compressed excitation sub-data; grouping the plurality of compressed excitation sub-data, and respectively decompressing each group of compressed excitation sub-data through a plurality of decomposition units to obtain a plurality of excitation sub-data; integrating the plurality of excitation sub-data to obtain the excitation data; and inputting the excitation data into a chip for excitation. With the above-mentioned technical scheme, the problem that the data transmission speed of storage equipment is slow or even cannot catch up with the analysis speed of excitation information due to the influence of the data transmission speed of an interface is solved, the decompression speed for the compressed excitation data is improved and the speed for excitation of the chip is further improved.

The invention discloses a gastrointestinal fluid pressure reducing device for the gastrointestinal surgery department. The gastrointestinal fluid pressure reducing device comprises a drainage pipe anda storage bucket, the storage bucket comprises a first bucket and a second bucket internally provided with liquid level sensors, a liquid inlet corresponding to a liquid drainage opening of the firstbucket is formed in the upper end of the second bucket, an electromagnetic valve is arranged on the liquid drainage opening, a groove is formed in the lower end of the first bucket, a protrusion structure matched with the groove is arranged at the upper end of the second bucket, an input pipe is arranged at the upper end of the first bucket and is inserted into a sucking pump and a controller inside the first bucket, an air purification chamber and an ozonator are arranged at one side of the first bucket in sequence, an inlet of the air purification chamber is connected with an output pipe ofthe sucking pump, an outlet of the air purification chamber is connected with the input end of the ozonator, the output end of the ozonator is connected with an air outlet pipe device, an isolation hood sleeves the drainage pipe, elastic strips are arranged at the two sides of the isolation hood, a sterilization chamber is arranged at one side of the second bucket, and an ultraviolet lamp is arranged inside the sterilization chamber. The gastrointestinal fluid pressure reducing device is high in drainage speed and good in pressure reducing effect, and gas is sterilized to be prevented from polluting the environment.

The invention relates to a binary image lossless compression and decompression IP core based on an FPGA. The binary image lossless compression and decompression IP core based on the FPGA comprises a register used for storing binary image data, an FIFO unit used for reading the binary image data in the register, an MR compression module which reads the original binary image data in the register through the FIFO unit and compresses the read original binary image data, and an MR decompression module which is used for reading the compressed binary image data in the register through the FIFO unit and decompressing the read compressed binary image data. The binary image lossless compression and decompression IP core based on the FPGA has the advantages of being good in binary image compression effect and high in compression and decompression speed. The binary image lossless compression and decompression IP core based on the FPGA can achieve a good application prospect in G3 equipment, G4 equipment and the application technology field.

The invention presents new methods of compression, transmission, and decompression of video signals providing increased speed and image quality and for protecting against camcorder piracy. Methods based on selecting an anchor frame, wavelet transformation with decimation and time stamping can provide one-pass encoding of signals in which the amount of bits of information needed to be transmitted can be substantially reduced, thereby increasing the speed of transmission of digital signals over networks. Decompressing signals, along with interpolation methods to re-create portions of images of lesser importance in visual perception, can provide coordinated video and audio presentations of high quality in real-time over all kinds of networks and frame interpolation resulting in a displayed frame rate significantly higher than 30 fps. The use of randomly selected anchor frames can render reconstructed transmitted images of poor quality for pirates who do not have access to identities of anchor frames.

The invention discloses a pipeline millisecond online data compound compression / decompression method, belonging to the field of data compression. The method comprises the following steps of: firstly, performing wavelet decomposition for the data, screening high-frequency and low-frequency wavelet coefficients with a threshold value, then, performing lossy compression for the data corresponding to the screened high-frequency wavelet coefficient through a SPIHT algorithm, performing lossy compression for the data corresponding to the screened low-frequency wavelet coefficient through a LZ77 algorithm, and finally obtaining the compression result. In an upper computer, data is decompressed through dSPIHT and dLZ77 methods. The compression method provided by the invention can reduce compression ratio under the premise of guaranteeing information integrity, save space for storage of millisecond data of a lot of pipelines and improve speed of data transmission; and the decompression method provided by the invention not only can guarantee decompression speed, but also can guarantee accuracy and integrity of recovered information.

The invention provides a telephone number attribution data compression algorithm, which comprises the following steps: 1) sorting and recording all region names, and taking record numbers as the index values of the region names; 2) sorting number segment data, replacing the region name corresponding to each number segment into the index value; 3) sorting and segmenting the number segment data according to the number segment, and independently compressing the data of each block of number segment; 4) obtaining the number segment through a telephone number; 5) finding corresponding block information through the number segment; 6) decompressing block data to obtain the index value of the corresponding region name of the corresponding number segment; and 7) obtaining the region name through the index value. The number segment data is partitioned, and each block of data is independently compressed; during retrieval, the corresponding block can be firstly found through the number segment, and the data of the block is then decompressed to obtain the index value; the corresponding region name is finally found through the index value; and therefore, the decompressed data is small, a compression rate is high, and operation speed is high.

A fast, raster-based, enhanced, data compression technique for the printing of compound documents, including pre-processing images in an original page description form of the data before the page data is rasterized, greatly improving compressibility. Unscaled image data is filtered before it is rasterized to the final printing resolution. The filtering specifically enables a separate, near loss-less, compression algorithm to operate on a rasterized page description with high compression ratios. A data compression technique enables a system to compress compound document using a relatively fast and simple algorithm with near loss-less print quality.

The invention provides a compression packet decompression method and device based on a matching tree, and a storage medium. The method comprises the following steps: a matching tree construction stepof constructing a matching tree based on a decompression configuration file; extracting step of reading the file name of the file in the compressed package, matching the file name with the matching tree, extracting the file if the matching is successful, and not extracting the file if the matching is unsuccessful. Thus, the required files are decompressed, and unwanted files are not decompressed,the decompression speed is greatly improved, the access times to the disk are reduced, the IO performance of the disk is improved, the energy consumption of the terminal equipment is reduced, the occupancy of the storage space is reduced, the running speed of the terminal equipment is improved, and the user experience is improved.

The invention relates to a streaming media playback method and streaming media playback equipment. The playback method comprises the following steps of: pre-cutting a video frame of a streaming media to form a plurality of small block frames, and distributing a frame number to each small block frame, so that the numbered small block frame number comprises a frame sequence identifier of an original video frame and a position identifier in the original video frame; then compressing the small block frames respectively, and storing the small compressed block frames into the same file of a hard disk sequentially; and decompressing the small block frames to corresponding positions of corresponding video frames by a plurality of threads of a multi-core central processing unit (CPU) according to the frame sequence identifier and the position identifier of the original video frame of each small block frame so as to synthesize a video frame to be played. According to the method, the decompression speed of the CPU can be increased greatly, and a phenomenon that a picture shakes can be avoided.

The invention provides a numeric data compression method based on bitwise variable-length storage. The numeric data compression method comprises the steps: judging the data type of to-be-compressed data; querying a memory binary storage mode of the to-be-compressed data, judging whether the adjustment of the length of the data type unit meets a compression condition or not, and determining the to-be-compressed data again; performing variable-length storage on the to-be-compressed data so as to store the to-be-compressed data according to the minimum length, and achieving data compression processing: in the integer data compression process, removing continuous 0 storage bits in the binary storage unit from a high bit to a low bit, and only storing 1-containing valid bits; in the floating point type data compression process, carrying out bit reduction storage according to the actual size and the precision range of the numerical value. By means of the storage mode of the data in the computer, bit-by-bit variable-length storage is achieved, up-down associated information and other key information between the data do not need to be considered, compression bits do not need to be stored,and compression storage can be achieved to the maximum extent on an existing storage structure.

The invention discloses an index data compression method of a web diagram. After dividing the index data (degrees and displacements) into blocks containing hundreds to thousands of nodes, then most ofthe blocks contain only low degree nodes, and the degree and displacement differences in these blocks can usually be stored in one or two bytes, and the compression rate of the index data can reach more than 50% (from the previous four bytes to one or two bytes), which improves the compressibility; The degree and displacement codewords of the same node are stored in the same cache line with highprobability through the cross storage of degree and displacement codewords, so the cache hit rate can be greatly improved; Through the fixed-length encoding to achieve real random access, the fixed-length encoding makes the index of the node compressed data be calculated, and according to the subscript for real random access, the decompression speed is improved.

A method and system allows for fast compression and decompressing of data using existing repetitive interleaved patterns within scientific data (floating point, integer, and image). An advantage of the method and system is that it is so fast that it can be used to save time due to a lower amount of data transferred / stored in scenarios like network transfer, disk or memory storage, cache storage or any other real-time applications where time plays a crucial role.

The invention provides a telephone number attribution data compression algorithm, which comprises the following steps: 1) sorting and recording all region names, and taking record numbers as the index values of the region names; 2) sorting number segment data, replacing the region name corresponding to each number segment into the index value; 3) sorting and segmenting the number segment data according to the number segment, and independently compressing the data of each block of number segment; 4) obtaining the number segment through a telephone number; 5) finding corresponding block information through the number segment; 6) decompressing block data to obtain the index value of the corresponding region name of the corresponding number segment; and 7) obtaining the region name through the index value. The number segment data is partitioned, and each block of data is independently compressed; during retrieval, the corresponding block can be firstly found through the number segment, and the data of the block is then decompressed to obtain the index value; the corresponding region name is finally found through the index value; and therefore, the decompressed data is small, a compression rate is high, and operation speed is high.

The invention discloses a method for compressing and decompressing a ring image, which comprises determining a reference data point in the ring image during the compression process, obtaining and saving characteristic data of the reference data point; The relative position between adjacent data points, determine the relative data of each data point relative to the previous data point and save it; during the decompression process, determine the starting position of the ring image according to the characteristic data of the reference data point; from the starting position At first, according to the relative data of each data point relative to the previous data point, the image of each data point is sequentially drawn to obtain a circular image. The invention is specially used for extracting the ring image, reduces the amount of data extracted during image compression, and improves the decompression speed during subsequent decompression, so that the user feels better. The invention also discloses a device, equipment and computer-readable storage medium based on the above method.

The invention relates to a remote system for automatically controlling a pressure regulating valve, and belongs to the field of mechanical manufacturing. The remote system for automatically controlling the pressure regulating valve is used for remote control of the pressure regulating valve in an oil field drilling blowout prevention safety device. The remote system for automatically controlling the pressure regulating valve is composed of a handle, a screw rod, a locking handle, a worm wheel, a worm, a spring seat, a small spring, a large spring, an air motor, a valve body and the like. The remote system for automatically controlling the pressure regulating valve is characterized in that the air motor is arranged outside the valve body, and a worm wheel and worm device is arranged in thevalve body; an output shaft of the air motor is connected with the worm; and the worm wheel and the screw rod are connected with each other through an inner screw thread of the worm wheel and an outerscrew thread of the screw rod. The remote system for automatically controlling the pressure regulating valve has the advantages of convenient remote control, good pressure regulation stability, highdecompression speed, unchanged set value after gas cut-off and the like.