52results about How to "Improve decompression efficiency" patented technology

The invention provides a method for compressing or decompressing name data, and equipment thereof, wherein the method comprises the steps of: for aiming at a preset name database which comprises a plurality of name data, generating a compressed character string set which covers all name data in the name database, wherein the character strings in the compressed character string set are generated based on total or partial characters of each name data; according to the frequency of the character strings in the compressed character string set, establishing a Huffman tree which corresponds with the compressed character string set, and generating a compression code table which comprises compression codes of all character strings in the compressed character string set; and in performing compression coding on one name datum, according to the character string contained in the name datum, obtaining the compression code which corresponds with each character string from the compression code table, and obtaining the compression codes of the name datum through combination. The method of the invention can improve compressing/decompressing efficiency for the name data.

The invention discloses a data sending method which is applied to data merging device so as to increase data transmission efficiency. The method comprises the following steps of receiving M data packets sent by a sending device, where the M is an integer greater than 1; dividing the M data packets into at least one type according to message types of data packets, wherein the message types form one-to-one correspondence with the types; according to the divided types, merging the M data packets into the N data packets, wherein each data packet in the N data packets at least includes information used for indicating all the data packets of one type, and the N is an integer less than the M; and sending the N data packets to a data splitting device, wherein the data splitting device is used to split the N data packets into the M data packets, and send the M data packets to a receiving device.

The invention provides a traffic information file compression and decompression method and device. The traffic information file compression method comprises creating an empty compression file according to a preset compression cycle, compression range, and compressed file storage position when the file compression conditions are triggered, wherein a file name of the empty compression file conforms to set rules; obtaining a source traffic information file to be compressed and a directory structure of the source traffic information file and performing compression on the source traffic information file; outputting the compressed traffic information file and the directory structure to the created empty compression file and storing and receiving the output compression file. According to the traffic information file compression and decompression method and device, the automatic decompression of the traffic information file is achieved and accordingly the efficiency of the decompression of traffic information data is improved.

The invention discloses a method and a device used for decompressing the compressed packet of a movable terminal; the method comprises the steps as follows: a PC decompression engine is transplanted and a decompression interface is provided for the decompression engine; the decompression interface is internally provided with a decompression filtration field; when the decompression interface is called to decompress the compressed packet, the decompression engine jumps over the content of the compressed packet corresponding to the decompression filtration field and decompresses the other content in the compressed packet. The method and the device can effectively reduce the system expense during the decompression process of the movable terminal and improve the decompression efficiency of the movable terminal.

The invention discloses a JPEG (Joint Photographic Experts Group) image decompression method, device and platform. The method includes the following steps that: an FPGA (Field Programmable Gate Array) end receives the encoding information of images to be decompressed sent by a CPU (Central Processing Unit) end; the FPGA end adaptively determines the number of the processing paths of Huffman decoding through using a preset JPEG image decoding algorithm and according to the number of the images to be decompressed; the FPGA end performs Huffman decoding operation in parallel on the plurality of paths of the data of the images to be decompressed according to the encoding information and the number of the processing paths of the Huffman decoding; the FPGA end adaptively determines the number of the processing paths of inverse discrete cosine transformation and RGB transformation according to the number of the processing paths of the Huffman decoding; and the FPGA end performs inverse discrete cosine transformation and RGB transformation in parallel on the plurality of paths of the data of the images to be decompressed which have been subjected to the Huffman decoding according to the determined number of the processing paths, so that decompressed image data are obtained. Thus, with the JPEG image decompression method, device and platform of the invention adopted, the bottleneck of decompression performance can be eliminated, and decompression efficiency can be improved.

The invention discloses a compressed image information reading control method and device. According to the invention, corresponding header information is obtained and written into corresponding addresses of a buffer memory according to an image operation demand. therefore, during a decompression process, header information required can be output directly from the buffer memory, thereby avoiding time delay caused by calling and bus reading operation and improving image decompression efficiency. By adding the buffer memory outside a decompressor, a part of header information is pre-fetched and buffered through a new reading control logic, so that the reading frequency of the header information is effectively reduced, and the delay of the decompressor from sending a header information requestto returning compressed video data is reduced.

The invention discloses a method for decompressing a gzip format file, and a storage medium. Target file head field is identified so as to obtain the amount of storage blocks pre-stored in a target file and the storage capacity value of each storage block, so that a plurality of storage blocks in the target file can be simultaneously decompressed. Compared with the prior art that the storage blocks in the target file are decompressed one by one, the scheme can simultaneously decompress a plurality of compression blocks each time so as to improve the decompression efficiency of the target file.In addition, the invention also discloses a device for decompressing the gzip format file, and also has the above effects.

A robust header compression processing method and a robust header compressor are disclosed. The method includes: a compressor processing a plurality of data packets at the front of a packet flow by using an Internet Protocol (IP) identifier random behavior pattern, and determining an IP identifier behavior pattern according to characteristics of IP identifiers in the plurality of data packets at the front; and the compressor processing subsequent data packets of the packet flow according to the determined IP identifier behavior pattern. With the robust header compression processing method and the robust header compressor, waste of wireless resources can be avoided, and a utilization rate of the wireless resources can be enhanced.

The invention relates to a pressurizer for a hydrogen fuel vehicle and a braking gas taking and pressurizing system and method. The pressurizer comprises a barrel with the two ends sealed, a piston plate set capable of moving along the axis of the barrel is arranged in the barrel and divides an inner cavity of the barrel into a pressure reducing cavity and a pressurizing cavity which are isolated,and one end of the pressure reducing cavity can communicate with the high-pressure gas supply end of a vehicle-mounted hydrogen system; a hydrogen outlet is formed in the middle of the barrel and used for communicating an inner cavity of the barrel with the low-pressure gas return end of the vehicle-mounted hydrogen system; the end, away from the pressure reducing cavity, of the pressurizing cavity can be unidirectionally communicated with the external atmospheric environment and the air cylinder. When the piston plate group moves towards the pressurizing cavity to a limit position, the hydrogen outlet is exposed in the pressure reducing cavity; and when the piston plate group moves towards the pressure reducing cavity to a limit position, the hydrogen outlet is not communicated with thepressurizing cavity.

The invention relates to the technical field of data processing, and discloses a file decompression method and device. The file decompression method comprises the steps of obtaining a to-be-decompressed compressed file, wherein the to-be-decompressed compressed file comprises N fragment compression units; determining an undecompressed fragmentation compression unit in the N fragmentation compression units as a first fragmentation compression unit, and determining a decompressed fragmentation compression unit in the N fragmentation compression units as a second fragmentation compression unit; acquiring second decompressed data corresponding to the second fragment compression unit; and decompressing the first fragment compression unit, and taking the decompressed first decompressed data and the second decompressed data as the decompressed data of the compressed file to be decompressed. By adopting the method provided by the invention, the time loss caused by re-decompression from the beginning after file decompression interruption can be reduced, and the decompression efficiency is improved.

A method for representing the items of a data, especially an audio data, by using fixed bits, is provided. The method can improve the speed to compress and decompress the data and reduce the load of the processor.

The invention relates to a decoding method, a processor, a decoding device and a storage medium. The method comprises: decoding data subjected to run-length coding in model data. By adopting the method, the operation correctness can be ensured on the premise of data compression.

The embodiment of the invention provides an address compression method, an address decompression method, a compressor and a decompressor. The address compression method and the compressor can improve the address compression ratio. The address compression method includes the steps that the compressor receives a plurality of operation request messages sent by a first processor; then, compression algorithms corresponding to operation request messages with the same flow number are determined according to address characteristics formed by address information carried by all the operation request messages with the same flow number; at last, addresses carried by the operation request messages with the same flow number are compressed according to the determined compression algorithms. The address compression method, the address decompression method, the compressor and the decompressor are suitable for the field of computers.

The invention discloses a method for decompressing a gzip formatted file. When a target file is decompressed, since the number of storage blocks and storage capacity values of the storage blocks in the target file can be obtained, multiple storage blocks in the target file can be decompressed simultaneously. Compared with a method of decompressing the storage blocks in the target file one by one in the prior art, the disclosed method obviously shortens the decompressing time of the target file, and the decompressing efficiency of the target file is improved. Besides, the invention further discloses a device for decompressing the gzip formatted file and a storage medium. The device and the storage medium have the same advantages.

To suppress occurrence of a defective coating film layer without lowering a decompression efficiency in a coating apparatus for forming a coating film layer on a continuously traveling web. The web W is tightened on a backing roll 11. A coating head 21 is arranged in a shoulder portion of the web W-supported backing roll 11 and a decompression chamber 22 is arranged on the upper stream side of the coating head. A guide plate 24 abutting on the web W is arranged on a back plate 22b of the decompression chamber 22 on the upper stream side. When a gap between the guide plate 24 and the surface of the web W is defined as Db, the length Lb of the guide plate 24 along the traveling direction of the web is set to be equal to or longer than twenty times of the gap Db.