289results about How to "Easy to decode" patented technology

A method of optimizing decoding of MPEG4 compliant coded signals is provided, comprising: disabling processing for non-main profile sections; performing reference frame padding; performing adaptive motion compensation. The method of decoding further including performing fast IDCT wherein an IDCT process is performed on profile signals but no IDCT is performed based on whether a 4×4 block may be all zero, or only DC transform coefficient is non-zero, and including CAVLC encoding of residual data. Reference frame padding comprises compensating for motion vectors extending beyond a reference frame by adding to at least the length and width of the reference frame. Adaptive motion compensation includes original block size compensation processing for chroma up to block sizes of 16×16.

Provided are a method and apparatus for decoding a mixed code that is a combination of first and second code images. In the method, a mixed code image is obtained by receiving the original image having the mixed code image and removing noise from the original image. Next, the colors, shades, and brightnesses of pixels of the mixed code image are categorized into groups based on a predetermined threshold, the mixed code image is divided into first and second code images, and first and second information are extracted by decoding the first and second code images, respectively. The first and second code images can be effectively decoded by decoding interpretation information, construction information, error control information, and code direction information stored in the first and/or second code images.

The present invention discloses a method for coding and decoding two-dimensional bar codes. The coding method comprises a data code word generating step, an error-correcting code word generating step, a main code pattern frame generating step and a code pattern image forming step through code word filling. The decoding method is that: a gray scale image of a code pattern is acquired through a digital photography mode; the gray value distribution of different pixels in the gray scale image is counted; a threshold value is determined; the gray scale image is converted into a binary image and an edge image is acquired; the four-corner coordinate of each macro block in the code pattern and the center coordinate of each unit module inside the macro blocks are calculated; the bit value stored by each unit module is determined so as to acquire a data code word matrix corresponding to the decoded code pattern; the data code word is read according to a correct center macro block and the code pattern direction; RS error-correcting algorithm is used to correct the errors in the code word according to a preset error-correcting grade; the data code word is output and recovered as a binary number.

Disclosed is a process of determining, at a point during shipment, whether the solid phase refrigerant in a shipment is sufficient to preserve the shipment cargo, which is blood or other biological products, for the remaining shipment period, by: monitoring the temperatures encountered to said point and estimating the temperatures likely to be encountered during the remaining shipment period; determining the likelihood that the remaining refrigerant can maintain the shipment cargo within a specified temperature range during the remaining shipment period; and if the risk that the remaining refrigerant cannot maintain the shipment cargo within said range during the remaining shipment period is above a cut-off level, then taking action to preserve the value of the cargo.

An embodiment of the invention relates to a method for coding and decoding a video image, coding equipment and decoding equipment. The method comprises steps as follows: determining a motion vector group of a current coding block; determining a prediction value of a first component set of a motion model initial vector of the current coding block according to the motion vector group; determining a to-be-transmitted value of the first component set according to the prediction value of the first component set; coding the to-be-transmitted value of the first component set and sending the coded to-be-transmitted value to a decoding end. According to the method for coding and decoding the video image, the coding equipment and the decoding equipment, the motion model initial vector of the current coding block is determined according to the motion vector group, the to-be-transmitted value of a motion model is determined according to the motion model initial vector and is coded and transmitted, so that the decoding end can decode according to the to-be-transmitted value of the motion model, and the volume of data transmitted during coding and decoding and occupied bit number can be reduced.

A communication system, network interface and communication port is provided that includes a media local bus. The local bus is connected between a controller and one or more multimedia devices located within a node of the communication system. The controller periodically broadcasts sync signals to the source device, or devices, to synchronize data transmission partitioned into time slots. Each time slot represents is dedicated to a particular data type. Thus, time slot 1 can accommodate packetized data, time slot 2 can accommodate synchronous data, time slot 3 can accommodate control data, and time slot 4 can accommodate isochronous data. Various combinations and variations of those time slots can occur where fewer than four data types can be present within a frame or all four data types can be present. The local bus includes a signal line and one or more data lines.

A method and apparatus for decoding an image are provided. The method includes: decoding information representing that a first block of the image has been encoded in a first mode; and reconstructing the first block by setting pixel values of the first block to be identical with pixel values of a second block of the image that is adjacent to the first block and has been decoded prior to the first block, wherein the first mode is a mode for encoding information representing that the first block is identical or similar to the second block and has been encoded in the first mode, instead of encoding the pixel values of the first block.

The invention discloses a decoding and sequencing method by real-time synthesis of two nucleotides into deoxyribonucleic acid (DNA). Single-sequencing reactions are performed on two different nucleotides of X and Y simultaneously and a base sequence fragment code of XYn is obtained according to the quantitative relation between the number of synthesizing nucleotides and the number of the detected molecules which are generated in real time. The sequencing comprises two sets of sequencing reactions on the same template; and in either set of sequencing, a cycle that two different nucleotides synthesize the sequencing reaction simultaneously is performed on deoxyadenosine triphosphate (dATP), deoxycytidine triphosphate (dCTP), deoxyguanosine triphosphate (dGTP) and deoxy-thymidine triphosphate (dTTP) containing four nucleotides in the mode that each nucleotide is used once in a cycle. After a plurality of sequencing reactions, information of a plurality of XYn ranked according to a sequencing order by the first set is obtained. When the set of sequencing reactions is completed, denaturation is performed to eliminate the extended strand of a sequencing primer and the sequencing primer is re-crossed to perform the second set of sequencing reactions; information of a plurality of XYn ranked by the second sequencing reaction is obtained; the specific base sequence of nucleic acid fragment to be detected is assembled by decoding the information of a plurality of XYn ranked according to a sequence order by the two sets.

The present invention discloses a disturbance-based cyclic redundancy check (CRC)-auxiliary medium-short code length Polar code effective-decoding method, falling within the technical field of error correction coding. The method of the present invention comprises: firstly, performing CRC coding on an information bit to be transmitted, and then coding a Polar code after the CRC coding. At a receiving end, if code words of an SC decoder cannot pass CRC, a disturbance operation is activated to make the SC decoder generate better code words. The disturbance operation refers to: adding a tiny independent noise to a channel output sequence for disturbance, and then performing decoding again by using the disturbed sequence. When the decoder generates code words capable of passing CRC or reaches a re-decoding count threshold, the method announces completion of decoding. A numerical simulation experiment shows that under the conditions of the same bit error rate and code error rate, compared with an SC decoding method, the decoding method provided in the present invention can obviously improve a bit signal to noise ratio. Moreover, along with the improvement of a channel environment, the decoding complexity of the method of the present invention is approximate to the complexity O (NlogN) of SC decoding.

The invention relates to a communication method for solving problems due to a hidden terminal in a wireless network based on a wireless interference cancellation technique and a node full-duplex mode. Under a wireless local area network physical layer, wireless network nodes are coded into special interference signals by an OFDM (Orthogonal Frequency Division Multiplexing) technology, and overlapped into data signals in the air by means of ''attachment''. The control information and the data information can be transmitted in parallel, thus, the resource consumption on control information can be saved. The nodes for receiving the data information can remove the interference signals by an interference canceling technology in order to obtain the original data. The node for receiving the control information can demodulate the control signal from the mixed signal by an energy detecting technology, so as to obtain the physical address of the node which is transmitting in a collision domain, as well as establishing a relative node list. By inquiring the transmitting state and the receiving state of adjacent nodes, the node can determine whether it is the hidden terminal, so as to avoid transmission of conflict data and increase channel utilization rate.

The invention relates to a method for single-mute absolute encoding, which comprises that: black strips and white strips are etched on a grating in an alternating way; a black strip and a white strip which are adjacent form a code bit; at least one code bit forms an identification code, at least one code bit forms a positional code, and all positional codes contain the same number of code bits; the number of the identification codes is the same as that of the positional codes and the identification codes and the positional codes are arranged in an alternating way; at least one code bit in each identification code is different of all code bits in each positional code; a code bit in each positional code forms a binary bit and is defined as 0 or 1 according to the width of the black strip of the code bit; the whole grating contains (m+p)*2 code bits at most, wherein m represents the number of the binary bits constituted the m bits of the positional codes and p represents the number of the code bits of the identification codes; an identification code and a positional code which are adjacent form a first code area; two adjacent first code areas form a secondary code area; and a bit sequence of a second positional code of each second code is the bit sequence after bitwise Not of a first positional code.

In the context of packet-oriented data transmission via a network, an apparatus for transmitting a sequence of data packets checks whether a packet is missing or faulty. In this case, a replacement packet is provided which is a valid packet with regard to a packet syntax which, however, has a predetermined contents characteristic. On the decoder side, a basic decoder recognizes the packet as a valid packet and decodes same, whereas an extension decoder can enable an error concealing measure on the basis of an indication in the replacement packet to the fact that this is a replacement packet, in order to provide a higher-quality audio reproduction.

The invention discloses a cooperative diversity scheme for wireless sensor networks based on the decoding and forwarding of distributed space-time codes, which comprises cluster head determination, cooperative establishment, time-slot planning and data transmission. The cooperative diversity scheme effectively solves the problems that a plurality of prior cooperative schemes such as amplify-and-forward, decode-and-forward, coded cooperation and so on have complicated design, difficult realization, low diversity efficiency, difficult cooperative synchronization and so on, effectively improves the frequency spectrum efficiency and the energy efficiency of the system, and greatly decreases the system energy consumption of the wireless sensor networks.

The invention discloses a relay-assisted environmental backscatter communication method. A relay assists a radio frequency transmitter and a backscatter communication device to communicate with respective target receivers at the same time. The backscatter communication device modulates the own information to the signal of the radio frequency transmitter, the relay decodes the information by adopting a serial interference elimination mode, forwards decoded information to respective information receivers in a non-orthogonal multiple access manner, and optimizes the performance of environment backscatter communication by optimizing the reflection coefficient of the environment backscatter communication device and a power distribution factor of the relay on the premise of ensuring the communication quality of the radio frequency communication link. Compared with a traditional decoding forwarding relay communication system, the relay-assisted environment backscatter communication method provided by the invention can obviously improve the communication performance of the system.

The invention discloses a decoding method, a decoding module, a signal processing method and a signal processing device, wherein the decoding method, the decoding module, the signal processing method and the signal processing device are based on difference Manchester encoding. In the decoding process of the decoding method, signals based on the difference Manchester encoding are sampled according to a preset sampling interval, a series of sampling sites are obtained, then the amplitude-time characteristic of the obtained sampling sites is converted into the time characteristic, and thus time stream data corresponding to the series of sampling sites are obtained; then, according to the time difference relation between the intersection point of the waveform phase overturning point corresponding to a code element 0 and a code element 1 in the difference Manchester encoding and the X axis and the last intersection point of the waveform corresponding to a previous code element and the X axis, a code element value is analyzed from the time stream data, the obtained code element value is converted, and then original data sent by a sender can be obtained. The decoding process is simple, decoding efficiency and decoding accuracy are high, and particularly the secret key communication real-time performance and precision requirements can be well met.

The invention relates to a method for optimizing multi-channel distribution in a distributed wireless local area network based on a self-adaptive learning model. In the invention, channel distribution information is provided for a medium access control sub-layer by using an interference adding module and an interference detection module of a physical layer based on an orthogonal frequency division multiplexing technology, so that a distributed node is helped to adaptively select a non-conflict channel under the non-synergistic condition for transmitting. The interference adding module is used for coding channel distribution information into an interference signal by using a communication interference technology for transmitting together with data information. An original data receiving node is used for eliminating the interference signal through an interference counteracting module to obtain original data. A channel access strategy for marking a control signal and a corresponding access channel is stored in each node. The node is used for adjusting and learning the channel access strategy by using a channel distribution module according to the detected control signal, so that a multi-channel time division multiplexing effect is achieved finally, and the consumption of network resources by the transmission of synergic information is avoided.

Methods and apparatus are provided for reading and writing data in q-level cells of solid-state memory, where q>2. Input data is encoded into codewords having N q^ary symbols, wherein the symbols of each codeword satisfy a single-parity-check condition. Each symbol is written in a respective cell of the solid state memory by setting the cell to a level dependent on the q^ary value of the symbol. Memory cells are read to obtain read signals corresponding to respective codewords. The codewords corresponding to respective read signals are detected by relating the read signals to a predetermined set of N-symbol vectors of one of which each possible codeword is a permutation.

The invention discloses a method and a device for accurately positioning a two-dimensional bar code. The method comprises the steps of carrying out image preprocessing on a two-dimensional image when an image sensor acquires the two-dimensional image; and completing binarization processing in the image preprocessing and carrying out accurate positioning on the two-dimensional image. The accurate positioning comprises the steps of carrying out primary positioning on a region where the two-dimensional bar code is located by depending on an image feature formed by a black-and-white module on the two-dimensional bar code after image pre-processing; and carrying out secondary traversal scanning on the primarily positioned two-dimensional code region and acquiring four vertexes of the two-dimensional code so as to realize accurate positioning. According to the embodiment of the invention, the method depends on the unique image feature formed by the black-and-white module on the two-dimensional bar code after preprocessing, that is, an obvious black-and-white contour line is provided, thereby carrying out primary positioning on the region where the two-dimensional code bar is located accurately as far as possible; and then secondary traversal scanning is carried out on the primarily positioned two-dimensional code region so as to realize accurate positioning finally.