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

The invention provides a method and equipment for compressing and decompressing name data. Wherein the method includes: for a preset name database containing a plurality of name data, generating a compressed character string set covering all name data in the name database, the character strings in the compressed character string set are based on each name data Generated by all or part of the characters; according to the frequency of the strings in the compressed string set, create a Huffman binary tree corresponding to the compressed string set, and generate a list that includes all the strings in the compressed string set The compression code table of the compression code; when compressing and coding a name data, according to the character string contained in the name data, the compression code corresponding to each character string is obtained from the compression code table, and the compression code of the name data is obtained by combining . The present invention can improve the compression / decompression efficiency of name data.

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 the field of data compression and discloses an X-BIT compressed encoding algorithm. The X-BIT compressed encoding algorithm comprises the following steps: data is prepared and converted, and the data is subjected to time difference, value sorting, calculating the maximum digit number of sequence numbers, generating sequence number compressed stream, generating state compressed stream, generating time difference compressed stream and generating difference value compressed stream, and finally, the outputted results of the steps are combined to form a byte stream, namely the compressed result. Compared with the prior art, the X-BIT compressed encoding algorithm has the beneficial effects that 1, the compression ratio is high; 2, the data causes no distortions; and 3, the decompression rate is high.

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.

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 page dot matrix self-adaptive compression method and device. The method comprises the steps that page dot matrix data in VDP work are acquired with a page acting as a unit; the page dot matrix data are compressed in turn and compression ratio of each page is recorded; and a compression mode is dynamically regulated according to compression ratio, and the compression mode comprises a previous-page-based encoding compression mode and a run length encoding compression mode. The invention also discloses a page dot matrix self-adaptive reduction method and device. With application of the method, decompression efficiency can be enhanced.

The invention discloses a software product-based installation package decompression method and device, wherein the method includes: acquiring software product identification information corresponding to the product installation package to be decompressed; acquiring a decompression strategy corresponding to the software product identification information from a preset storage location Information, decompression strategy information corresponding to different software product identification information is stored in the preset storage location; according to the obtained decompression strategy information, the installation package of the product to be decompressed is decompressed. In this way, different decompression policy information can be automatically adapted to different product installation packages to be decompressed, so that the product installation package to be decompressed can be decompressed according to the appropriate decompression policy information. The whole process does not require manual participation, saving a lot of human resources, and This solution can also improve decompression efficiency, adapt a suitable decompression strategy for each product installation package to be decompressed, and effectively reduce the error rate in the decompression process.