A method for transmitting data from an ultrasonic sensor to a computer system includes forming a feature vector signal from an electric reception signal; recognizing signal objects in the reception signal and classifying the signal objects according to predetermined signal object classes. The signal objects are forms or sequences of forms. At least one object parameter allocated to the signal object and one symbol for the signal object class are allocated to each signal object, or for each signal object, at least one signal object parameter and a symbol object are determined. The method further includes transmitting the symbol and the at least one signal object parameter to the computer system as data of a recognized signal object. One of the forms in the signal object belonging to the signal object class includes a peak, and one of the transmitted signal object parameters is an amplitude of the peak.

A method for pre-processing files that can improve file compression rates of existing general-purpose lossless file compression algorithms, particularly for files on which traditional algorithms perform poorly. The elementary cellular automata (CA) pre-processing technique involves finding an optimal CA state that can be used to transform an original file into a format (i.e., an intermediary file) that is more amenable to compression than the original file format. This technique is applicable to multiple file types and may be used to enhance multiple compression algorithms. Evaluation on generated files, as well as samples selected from online text repositories, finds that the CA pre-processing technique improves compression rates by up to 4% and shows promising results for assisting in compressing data that typically induce worst-case behavior in standard compression algorithms.

A system and method for concurrent encryption and lossless compression of data with an algorithm executing on a computer platform. The lossless compression component of the algorithm consists of preprocessing the data with a Burrows-Wheeler transformation followed by an inversion ranking transformation in advance of employing an entropy coder, such as binary arithmetic coder. The frequency vector of the Inversion Ranking transformation is then encrypted and transmitted along with the compressed data with only the frequency vector encrypted. Since the frequency vector is required for decompression, no further encryption of the compressed data is necessary to secure the compressed file.

A method for storage system data aware compression, the method may include pre-compressing data units received by the storage system, by different pre-compression units to provide different pre-compressed versions of the data units; wherein the different pre-compression schemes are associated with different compression schemes, wherein at least some of the different compression schemes are data type specific compression schemes; calculating entropies of the different pre-compressed versions; and selecting a compression scheme out of the different compression schemes based on the entropies of the different pre-compressed versions.

A system and method for data compression with genomic encryption, which uses frequency analysis on data blocks within an input data stream to produce a prefix table, representing a first layer of transformation, and which applies a Burrow's-Wheeler transform (BWT) to the data inside the prefix table, representing a second layer of transformation, and which compresses the transformed data. In some implementations, the system and method may further include applying the BWT to a conditioned stream of genomic data, wherein the conditioned stream of genomic data is accompanied by an error stream comprising the differences between the original data and the encrypted data.

Methods and apparatus for compressing and decompressing genetic information from an individual. In one arrangement, a data compression method generates a compressed representation of at least a portion of an individual's genome by receiving an input file having a representation of the genome as a sequence of variants defined relative to a reference genome. A reference database having a plurality of reference lists of genetic variants from other individuals is accessed. Each reference list has a sequence of genetic variants from a single, phased haplotype. Two mosaics of segments from the reference lists are identified which match the genome to within a threshold accuracy. Each mosaic represents a single one of the two haplotypes of the individual's genome and includes a portion of the sequence of genetic variants from one of the reference lists. The compressed representation is generated by encoding the two mosaics and deviations from the two mosaics.

A video coding mechanism is disclosed. The mechanism includes partitioning a first picture into a plurality of tiles. A group of the tiles is assigned into a first tile group. The first tile group is a rectangular shape that wraps around the first picture in a horizontal direction and a vertical direction. The first tile group is encoded into a bitstream. A flag is encoded into a parameter set in the bitstream to indicate the first tile group is an arbitrary tile group. The bitstream is stored for communication toward a decoder.

The present invention provides a method for performing optical image detection using a camera module comprising a Digital MicroMirror Device, a first point Photo Detector, a second point Photo Detector, a first lens and a second lens. The method comprises: mapping incident light onto an image plane of the DMD to form a light irradiance map; selecting N pixels on the DMD for time frequency coding; associating each selected pixel with a unique Walsh code time sequence; time frequency coding by the DMD the optical irradiance values of each selected pixel using a plurality of selected bits of its associated Walsh code time sequence; detecting the time frequency coded optical irradiance values of the selected pixels simultaneously at the first point Photo Detector and at the second point Photo Detector; and performing simultaneous signal processing on the time frequency coded optical irradiance values detected by the first point Photo Detector and by the second point Photo Detector to determine the light intensity of each of the selected pixels and produce an image of the incident light.

The present disclosure relates to an infrared remote control code matching method and apparatus, a computer device, and a readable storage medium. The method includes that: an infrared remote control code stream is acquired; a data region of the infrared remote control code stream is divided into multiple data subregions according to occurrence frequencies of the code data in the infrared remote control code stream; an encoding process is performed on each piece of code data in the infrared remote control code stream according to a size of each piece of code data in the infrared remote control code stream and the multiple data subregions to obtain an encoded stream; and the encoded stream is matched with an encoded infrared remote control code stream recorded in an infrared remote control code library to find a corresponding infrared remote control code stream from the infrared remote control code library.

Systems and methods may provide flexible picture partitioning, a method includes receiving a coded picture that is partitioned into a plurality of coding tree units (CTUs), wherein at least one row or column of CTUs, among the plurality of CTUs of the coded picture, that is adjacent to a boundary of the coded picture has a size dimension that is smaller than a corresponding size dimension of each CTU among the plurality of CTUs that is not adjacent to any boundary of the coded picture; and decoding the coded picture based on the plurality of CTUs, wherein the at least one row or column of CTUs includes a first CTU row or a first CTU column of the coded picture that is adjacent to a top boundary or left boundary of the coded picture, respectively.