33results about How to "Increase compression rate" patented technology

The embodiment of the invention discloses a method for compressing film thumbnails, comprising the following steps: carrying out loss compression on the film thumbnails to acquire film thumbnails with specific digits; carrying out run coding on the film thumbnails with the specific digits; and carrying out lossless compression on the film thumbnails which are subjected to the run coding to acquire compressed pictures. The embodiment of the invention also provides a device for compressing film thumbnails. In the invention, the loss compression, the run coding and the lossless compression are combined effectively to compress the film thumbnails, thus having the advantages of higher compression ratio, high compression efficiency, low degree of distortion and fast decoding speed.

The invention specifically relates to a three-dimensional model data compression method and system, and the method comprises the steps: enabling each floating-type top coordinate in to-be-compressed three-dimensional model data to be divided into high 8-bit data and low 24-bit data; respectively arranging the high 8-bit data and low 24-bit data according to a preset sequence, and storing the ordered high 8-bit data and low 24-bit data; enabling a first index value in the to-be-compressed three-dimensional model data to serve as a reference value, and calculating the offset relative to an (N-1)-th index value except the N-th index value, wherein the index value is an integer, the offset of the N-th index value relative to the (N-1)-th index value is equal to the difference between the N-th index value and the (N-1)-th index value, and N is not less than two; and carrying out the LZMA coding of the to-be-compressed three-dimensional model data processed through the above steps. Through the above technical scheme of the invention, the method can improve the compression rate of three-dimensional model data.

The embodiment of the invention discloses methods and devices for compressing and decompressing data. The method for compressing the data comprises the following steps of receiving a first data packet to be compressed; and compressing the first data packet by utilizing a first reference dictionary, so as to form a first compressed data packet, wherein spaced continuous data packets with preset length exist between the first reference dictionary and the first data packet before the first reference dictionary is corresponding to the first data packet, the first compressed data packet carries data packet information corresponding to the first reference dictionary. According to the methods and devices disclosed by the embodiment of the invention, the data compression efficiency and the data decompression efficiency can be improved.

A method and apparatus of encoding and decoding an Extensible Markup Language (XML) document using a path code is provided. A method of encoding an XML document, the method including: searching the XML document for all element tags and all attributes including character data; extracting an XPath of each of the retrieved element tags and attributes; converting the extracted XPath into a predetermined path code; and expressing an occurrence indicator of each of all element tags included in the converted XPath.

An itemized data compressing and packing method comprises a packing process and a data reading process. The packed file includes a file header and an index chain and a data chain which are mutually independent and are connected with the file header. The index chain stores index data node information, and the data chain stores data storage node information. The index chain includes an index data block 1, an index data block 2, ..., and an index data block n (n>=2), and each index data block is corresponding to an index data node. The data chain includes a data storage block 1, a data storage block 2, ..., and a data storage block n (n>=2), and each data storage block is corresponding to a data storage node. The index data blocks are mapped to the data storage blocks one by one. The address of a next index node is stored at the end of each index data block, and the address of a next data node is stored at the end of each data storage block.

The invention relates to a compressor and a control method and controller thereof. The compressor comprises a push head and a hydraulic oil cylinder which is suitable for driving the push head. The method includes the steps that whether the initial return position of the push head is a full-stroke position or not after the current compression operation is completed is determined, and the full-stroke position corresponds to the maximum elongation position of the push head; and when it is determined that the initial return position of the push head is the full-stroke position after the push headcompletes the current compression operation, compression is stopped, the hydraulic oil cylinder is controlled to drive the push head to return to the initial position of a compression stroke, and theinitial position corresponds to the minimum elongation position of the push head. According to the scheme, the energy efficiency of the compressor can be improved and the service life of the compressor can be prolonged.

The invention provides a hardware compression system and method based on a pipeline mode. The hardware compression system based on the pipeline mode comprises a management control unit, a pipeline matching unit, a standard format conversion unit, a static Huffman coding unit and a data stream generation unit, and the management control unit is used for controlling and coordinating data transmission of other units, obtaining to-be-compressed data and outputting compressed data. The pipeline matching unit is used for calculating the same matching position of the current input character and the previous input character, and the current input character is continuously matched with the same length. The standard format conversion unit is used for converting the input characters into a standard data format. The static Huffman coding unit is used for coding the data in the standard data format into a Huffman coding stream. The data stream generation unit is used for converting the non-fixed-length code stream into a fixed-length code stream and outputting the fixed-length code stream. According to the technical scheme provided by the embodiment of the invention, the data compression rate is improved, and the time for occupying the central processing unit and the memory resources are reduced.

The present invention provides a method and system for compressing CR images with equal resolution. The method includes receiving multiple CR images; randomly selecting two consecutive images from them, and calculating the binary data of all corresponding pixel points in the two consecutive images Middle D i The total number of the same pixels, and then calculate the first probability that the total number accounts for the number of pixels in the image, and compare it with the two preset thresholds to find out the number of suspected high and median data ; According to the sum of the two digits, calculate the second probability that the first j digits are the same, and find out the high and median data; put the high and median data in each image together to form a new data block, and the previous one The data block is the reference data block, compare all subsequent data blocks with the previous reference data block, give 1 if the data is the same, and give 0 if the data is different, and use different comparison units for high-order data and median data to form a mark data block; for mark data The flag bit data in the block is run-length coded and arithmetic coded.

The invention relates to an accelerated realization method of DCT algorithm and DWT algorithm based on CUDA framework for image compression, belonging to the field of image compression. The existing image processing methods have the problem of low compression rate. A DCT algorithm based on the DWT architecture and an accelerated implementation method of the DWT algorithm for image compression, analyzing the software system and hardware system of the CUDA platform, and building the CUDA platform based on VS2010 under the Windows operating system; the DCT algorithm and the DWT algorithm respectively Mapped to the kernel function of the two-layer CUDA execution model, the improved DCT algorithm and DWT algorithm are obtained, and the improved DCT algorithm and DWT algorithm are respectively implemented on the GPU side; the improved DCT algorithm is run on the CUDA platform. The invention is applicable to the realization of DCT algorithm and DWT algorithm on CUDA platform. Parallel execution of the calculation process can obtain a compression ratio of several tens of times relative to the CPU, thereby effectively improving the compression rate of digital image compression.

The invention discloses a high-speed real-time downhole compression method of a neutron logging tool while drilling based on a small dictionary. The dictionary is initialized when the power is turned on, and then the original downhole data is cached; the compression is started after the 8-byte shift register is full. , 8-byte data is searched in 8 small dictionaries at the same time, and the matching length and matching address can be output in one clock cycle. If there are multiple dictionaries matching at the same time, select the 10bits address corresponding to the dictionary with the longest matching length as compression code output; convert the 10bits compressed code into 8bits data and then serially convert and store it in Flash; at the same time update the address of the small dictionary and write the matched character string and the next character into this address; update the shift register; and so on until Compression ends.

The invention provides a high-speed lossless data compression system based on a content addressable memory, which relates to the technical field of the data compression of a hardware system. The invention solves the problems of low compression rate, heavy consumption of limited RAM resources in a hardware chip, indefinite search cycle, and the like, and solves the problem that address conflict exists in the dictionary searching which is realized by adopting a hash table address module. The invention comprises a clock module, an input data buffer module, a dictionary module, an LZW algorithm kernel module and an output encoding module, wherein, the dictionary module is constructed by the CAM inside an FPGA, the bit width of the CAM is 17, and the depth of the CAM is 512; the address of thememory in the CAM corresponds to the code of the LZW algorithm in the LZW algorithm kernel module, and the memory comprises a comparator and a trigger; the trigger is used for storing data, and the comparator is used for comparing input data with the data in the trigger and outputting a matching signal. The data compression system realizes the high-speed lossless data compression based on the FPGAand enlarges the range of application.

The invention discloses a recorded waveform data processing method and a recorded waveform data processing device, wherein the recorded waveform data processing method comprises the steps of acquiring the number of periodical sampling points of recorded waveform data, wherein the recorded waveform data are electric energy quality monitoring data; and performing inter-cycle differential calculation on the sampling point data at the same position between the cycles for obtaining differential data, so that advantages of low subsequent processing data volume, high processing speed in compression or transmission, and the like are realized. The recorded waveform data processing method and the recorded waveform data processing device can reduce data volume of to-be-compressed data or to-be-transmitted data, thereby reducing compression calculation amount and data volume after compression, and improving compression rate. Furthermore the recorded waveform data processing method and the recorded waveform data processing device can relatively effectively reduce storage and / or transmission load of the mass recorded waveform data of an electric energy quality monitoring terminal.

The invention discloses a data transmission method. The method comprises the following steps: dividing data to be transmitted into data blocks with preset data block sizes; and sequentially sending the target data block message obtained by compressing and packaging each data block to a receiving end. Therefore, the data can be partitioned before data transmission, compressed and packaged one by one, and then sent to a receiver one by one, so that the one-time calculation amount and transmission amount are effectively reduced, consumption of a large number of calculation resources is avoided, and the transmission speed can be effectively increased. Meanwhile, each data block can be judged, if the current data block does not need to be compressed, computing resources are not wasted to compress the current data block, the data compression rate is further increased, and therefore the data transmission rate is increased. The embodiment of the invention further provides a data transmission device and system, and the above technical effects can also be achieved.

The invention discloses an energy-saving garbage leachate treatment device, which comprises a driving seat, a feed end, a treatment box, a garbage discharge port and a liquid separation cylinder. One side of the treatment box is hinged with an inspection door, and the other side of the treatment box is The bottom of the side is equipped with a liquid outlet pipe, and the top of the treatment box is connected with a feed end, and the center of the top of the feed end is connected with a drive seat, and the top of the feed end on both sides of the drive seat is provided with a feed port. The outer side of the tank is uniformly hinged with an adjustment plate, and solar panels are installed on the adjustment plates. A liquid guide seat is installed at the center of the inner bottom of the treatment box, and a blanking seat is installed inside the treatment box above the liquid guide seat. A liquid separation cylinder is arranged inside the treatment box above the unloading seat. The invention can effectively crush the garbage, and carry out bag-breaking treatment on the bagged garbage, avoid leachate remaining in the garbage, fully separate the garbage and the leachate, improve the separation rate of the garbage and the leachate, and increase the compression rate of the garbage.

The embodiment of the invention discloses a data compression system and method which are used for improving the compression rate of an LZW compression algorithm. The system comprises: a dictionary memory for storing a first number of sub-dictionaries, each sub-dictionary comprising a second number of storage areas, each storage area corresponding to a hash value; a parallel computing module used for acquiring to-be-compressed data, obtaining a current character and a prefix character string corresponding to the to-be-compressed data, and performing XOR calculation on the current character and the prefix character string according to bits to obtain a first hash value, and adding the offset to the first hash value to obtain a second hash value, and finally obtaining index contents from the storage areas corresponding to the first hash value and the second hash value in parallel; a coding state machine, which is used for determining the matching condition of the current character, the prefix character string and the index content; a selection arbiter which is used for determining the storage area to be written and the content written into the storage area to be written according to the matching condition, or determining the output content according to the matching condition.

The present invention provides a preprocessing method and system for realizing similar image compression based on FPGA, which belongs to the technical field of image processing. The method of the present invention receives multiple similar images by using an external FPGA chip; calculates pixels at the same position in multiple similar images The average or median of the point data constitutes a model image; each similar image is compared with the model image respectively, and the absolute value of the difference between the data of the pixel points at the same position is calculated; if more than two consecutive If the absolute value of the difference corresponding to the pixel is less than or equal to the preset model threshold, the position information of the first pixel and the number of consecutive pixels are output; otherwise, the original image data is output. The invention utilizes an external FPGA chip for processing, has high compression rate and short compression time, and can release the computer to do other processing, and the compressed data can be further compressed by traditional compression methods to improve image compression rate.

The invention discloses a novel axial-flow turbo-machine. The novel axial-flow turbo-machine comprises a shell and a driving motor, the output end of the driving motor is fixedly provided with a rotating shaft extending into the shell, a fan blade assembly is arranged on an air inlet of the shell, the fan blade assembly comprises a fixed ring plate, an annular groove is formed around the circumference of the inner wall of the fixed ring plate, an annular bearing is fixed to the rotating shaft, rotary cutting blades are fixed to the annular bearing, the bottoms of the ends, not making contact with the annular bearing, of the rotary cutting blades are fixedly provided with arc sliding blocks, the arc sliding blocks are located in the annular groove one by one, and the rotary cutting blades can do circumference motion between the annular bearing and the inner wall of the fixed ring plate. The machine is reasonable in structural design and convenient to use, the rotary cutting blades can do independent high-speed rotation, the rotary cutting rate of the air is improved, and the rate of air compression in a compression room can be improved.

The invention discloses a high-speed lossless data compression method based on a GPU-CPU hybrid platform. The method includes: allowing a CPU to read a data file to be compressed, copying the data file to be compressed from a memory to a global memory of a GPU, setting a thread block set bk(a) of the GPU, setting the number b of threads in each thread block, setting a length c of a compression dictionary window, setting a head hand p_dic_h pointing to a first compression dictionary window, setting the size d of a pre-reading window, setting a hand p_pre_r pointing to a first pre-reading window, setting an initial value p_dic_h-c of the hand, initializing an operating thread set threads(a*b), c*d in size, and (a*b / 2) / c matrixes gMatrix, calling the (a*b / 2)-th thread in the operating thread set threads(a*b) to process q=(a*b / 2) / c data, c+d in length, in the data file to be compressed, searching for oblique segments having most continuous 1 from each of the q result matrixes gMatrix, and determining a three-element result array locations(p) of each result matrix. The method has the advantage that compression rate of massive data can be increased greatly.

The invention specifically relates to a three-dimensional model data compression method and system, and the method comprises the steps: enabling each floating-type top coordinate in to-be-compressed three-dimensional model data to be divided into high 8-bit data and low 24-bit data; respectively arranging the high 8-bit data and low 24-bit data according to a preset sequence, and storing the ordered high 8-bit data and low 24-bit data; enabling a first index value in the to-be-compressed three-dimensional model data to serve as a reference value, and calculating the offset relative to an (N-1)-th index value except the N-th index value, wherein the index value is an integer, the offset of the N-th index value relative to the (N-1)-th index value is equal to the difference between the N-th index value and the (N-1)-th index value, and N is not less than two; and carrying out the LZMA coding of the to-be-compressed three-dimensional model data processed through the above steps. Through the above technical scheme of the invention, the method can improve the compression rate of three-dimensional model data.

The invention discloses a leachate treatment device of a garbage transfer station, which comprises a feed end, a treatment box, a garbage discharge port and a liquid separation cylinder. One side of the treatment box is hinged with an inspection door, and the bottom of the other side of the treatment box is A liquid outlet pipe is installed, and a control button is installed on one end of the treatment box. A controller is installed inside the treatment box below the control button. The treatment box below the controller is provided with a garbage discharge port. A liquid guide seat is installed in the center of the end, and a discharge seat is installed inside the treatment box above the liquid guide seat, and a liquid separation cylinder is arranged inside the treatment box above the discharge seat. The invention can effectively crush the garbage, and carry out bag-breaking treatment on the bagged garbage, avoid leachate remaining in the garbage, fully separate the garbage and leachate, improve the separation rate of garbage and leachate, increase the compression rate of garbage, and facilitate Transportation and treatment of lumpy garbage.