75results about How to "Improve decoding rate" patented technology

A quality of service profile for a mobile communication subscriber unit is determined and includes one or more mobile-specific desired quality of service parameters. Actual values for the service parameter(s) is(are) determined and fed back to a link quality controller to determine whether they are in an acceptable range or relationship with corresponding actual quality of service parameter values. A modulation and / or coding scheme for transmitting the information over the radio link is selected or adjusted based on whether the desired and actual quality of service parameters are in an acceptable range or acceptable relationship. A combined “desired” quality of service parameter using the first and second quality of service parameters (or more if desired) may be determined. A combined “actual” quality of service parameter using first and second actual quality service parameter values is determined. Those combined desired and actual quality of service parameters are compared to determine whether they are in an acceptable range or relationship. The modulation or coding scheme (or both) is (are) selected or adjusted based thereon.

A method of transmitting control information in a carrier aggregation system is provided. The method includes: transmitting bandwidth information of a component carrier; configuring downlink control information including an additional indication field and an information field; mapping the downlink control information in any one of containing units having a plurality of predetermined different bit sizes in accordance with the bandwidth information; and transmitting the downlink control information mapped to any one of the containing units, wherein the information field is any one of a plurality of control information formats applicable to the component carrier, and the additional indication field includes information indicating a specific control information format to which the information field corresponds among the plurality of control information formats. Accordingly, the number of blind decoding attempts of a user equipment can decrease in a carrier aggregation system. Therefore, power consumption of the user equipment can decrease, and a decoding rate can increase.

A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success / failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission.

A video stream (for example, H.264 video) includes intra-encoded portions. Decoding an intra-encoded portion utilizes the result of decoding one or more other portions (called predecessors) in the frame. Frame reconstruction involves identifying a portion that has no predecessor portions that have not been decoded and then initiating decoding of the identified portion(s). When the decoding of a portion is substantially complete, then the remaining portions to be decoded are examined to identify portions that have no predecessors that have not been decoded. By carrying out this method, multiple portions may be decoded simultaneously. Each can be decoded on a different work entity, thereby increasing the rate of decoding of the overall frame. Because deblock filtering a predecessor destroys information needed in the intra-decoding of other portions, prefiltered predecessor information is stored in a buffer for subsequent use during intra-decoding, thereby facilitating simultaneous decoding of multiple portions.

Provided are a method and an apparatus for parallel Turbo decoding in LTE, comprising: storing input check soft bits and a frame to be decoded, when storing said frame, dividing the frame into blocks, storing each block respectively as system soft bits; simultaneously performing component decoding once for several blocks of one said frame, and in the process of component decoding, dividing each block into several sliding windows according to a sliding window algorithm, calculating the following parameters according to system soft bits, check soft bits and priori information: branch metric value γ, forward state vector α, backward state vector β, LLR, and priori information, storing the priori information for use in a next component decoding; completing a decoding process after several component decoding; performing a hard decision on LLR, and if judged that a result of the hard decision meets an iteration ending condition, outputting a decoding result, otherwise, performing next iteration decoding.

Disclosed is a data transmission / reception apparatus and method for minimizing decoding errors during high-speed packet transmission in a CDMA mobile communication system. When retransmitting data in the Hybrid Automatic Repeat Request ('H-ARQ') technique, the data transmission / reception apparatus and method performs symbol mapping on coded bits to be retransmitted by allocating different reliabilities to the coded bits according to the number of retransmissions, thus resulting in an improvement of system performance.

The invention improves the refresh rate and minimizes the memory for display when reproducing a color image. A color image encoding device has a creation device which counts the number of colors used in color image data and creates a global palette which lists corresponding indexes when the number of colors is a specified value or less, a block division device which divides the color image data into a plurality of blocks, a local palette creation device which creates a local palette which lists indexes in the global palette when the number of colors in a block is less than the number of colors in the global palette, and a color index assigning device which assigns the indexes in the global palette to the input pixels when the number of colors is the same as the number of colors in the global palette, and assigns the indexes in the local palette to the input pixels when the numbers of colors is different from the number of colors in the global palette.

The invention discloses a nonvolatile storage chip sin burning method and system and belongs to the field of chip technology. The burning method comprises the following steps: collecting a bar code / two-dimension code and analyzing the information loaded by the bar code / two-dimension code; calling a storage chip read-write dynamic link library to burn the information to a storage chip through the storage chip hardware interface of equipment. With adoption of the embodiment of the invention, burnt information is loaded by fully utilizing the advantages of high density, large coding range, high fault tolerance and high decoding rate of the code / two-dimension code; in addition, the information is burnt to the storage chip through the hardware interface of the storage chip on software control equipment, so that the difference between storage chips and the difference of the hardware interface are shielded, a unified burning interface is provided for an application layer so as to complete burning of different chips, the burning procedure is simplified, and the cost is saved.

The invention relates to a high-performance barcode decoding method. The method comprises the steps that the barcode type is judged firstly, scanning and decoding parameters are determined according to the barcode type, and scanning, identification and combination are performed simultaneously and then scanning is completed so that decoding is completed. Compared with the methods in the prior art, the problems in the actual situation that any one scanning line cannot completely scan all the empty image of a barcode image and cannot successfully decode can be effectively handled by the method so that the decoding rate can be enhanced. Meanwhile, the high-performance barcode decoding method also has high performance and has high decoding capacity for the image having interference.

The invention provides a differential Manchester decoding circuit and system. The differential Manchester decoding circuit comprises a filter unit, a clock recovering unit, a code element recovering unit and a decoding unit. The filter unit is used for filtering glitches in input signals and outputting obtained data without the glitches to the clock recovering unit and the code element recovering unit. The clock recovering unit is used for decoding the data without the glitches, obtaining a coupling clock and outputting the coupling clock to the decoding unit. The code element recovering unit is used for shaping the data without the glitches, obtaining combined data and outputting the combined data to the decoding unit. The decoding unit is used for sampling the combined data according to the coupling clock to obtain original data code elements. The differential Manchester decoding circuit is simple in decoding process and high in decoding rate, and the differential Manchester decoding circuit and system are suitable for wireless communication products at low frequencies.

A method for packet retransmission employing feedback information is disclosed. The method for packet retransmission employing feedback information comprises receiving reception acknowledgement information from a receiver after a transmitter transmits packets, the reception acknowledgement information representing channel status information and decoding success / failure of the packets; and changing a retransmission mode in accordance with the channel status information if the reception acknowledgement information represents decoding failure, and transmitting retransmission packets of the packets in accordance with the changed retransmission mode. Thus, it is possible to improve decoding probability of the receiver and increase efficiency of retransmission.

The embodiment of the invention provides a cross-protocol communication method and device from Wi-Fi to BLE. The method comprises the following steps: splitting and encoding each bit of a BLE symbol to generate an initial phase sequence; adjusting the initial phase sequence according to a decoding probability model to obtain a phase sequence with the maximum probability that the BLE symbol is correctly decoded, the decoding probability model being determined according to the probability that an error occurs when a sampling point falls into a specified phase; optimizing the phase sequence according to a phase optimization model to obtain an optimal phase sequence of the BLE symbol, the phase optimization model being an objective function constructed by taking minimum simulation error of Wi-Fi as an objective; and simulating a target waveform by using a Wi-Fi signal to perform cross-protocol communication from Wi-Fi to BLE, the target waveform being a time domain waveform corresponding to the optimal phase sequence. According to the embodiment of the invention, cross-protocol communication from Wi-Fi to BLE can be realized, the Wi-Fi simulation error is small, and the decoding probability of the symbol at the receiving end is high.

Disclosed is a method for transmitting data comprised of bits with higher priority and bits with lower priority output from a coder, using a high-order modulator in which a bit stream comprised of at least 3 bits represents one symbol and includes a first bit part with higher reliability and a second bit part with lower reliability. The method comprises modulating the bits with higher priority and the bits with lower priority such that the bits with higher priority are mapped to the first bit part and the bits with lower priority are also mapped to the first bit part at initial transmission; and modulating the bits with higher priority and the bits with lower priority such that the bits with higher priority are mapped to the second bit part and the bits with lower priority are mapped to the first bit part at retransmission.

The embodiment of the invention discloses a network coding method for the streaming media of a peer-to-peer network. The method includes the following steps that: based on a segment length constraint, nodes are classified, the segment length constraint is a feasible maximum segment length which can be adopted by each node, the nodes are divided into L levels, which respectively have k1 nodes, k2 nodes, ..., kL nodes, and n, which is node number, is equal to k1 plus k2 plus ... plus kL; according to the node levels L, the different segment lengths gi of the nodes of each level are determined, and i is equal to 1, 2, ..., L; according to the node levels L and the segment lengths gi of each level, the data in the segments are randomly network-coded, so that in-segment coding is implemented; the nodes with segment lengths in all the levels cooperate with one another, and the nodes of the high level receive the data requests of the nodes of the same level or the low level, and send data to the request nodes. According to the method provided by the embodiment, the buffers and other resources provided by different nodes are sufficiently utilized, the advantages of network coding are maintained, the utilization rate of network bandwidth can be improved by increasing the effective load rate of coded data, and the method is highly practical.

The invention provides a segmented decoding method for scrambled network video streams and relates to the technical field of processing of the video streams. The method includes: capturing video data packets transmitted from a network, setting a cache for each video stream, sequentially storing the data packets at corresponding positions, and starting video decoding when consecutive data packets reach an appointed size; adopting an FFmpeg technique for decoding of data blocks, modifying corresponding contexts during decoding, and enabling FFmpeg to continue decoding by means of disguising. An independent printed circuit board with a plurality of acceleration units is adopted for decoding, the acceleration units are implemented by means of the FFmpeg technique, and accordingly parallel decoding can be realized; no matter in which sequence the network video streams are received, the video streams can be spliced and decoded to the maximum extend by taking the data blocks as units according to the segmented decoding method which is supportive to parallel decoding of various data streams; by adoption of the segmented decoding method, available frame count receiving rate and decoding rate of the video streams are increased.

The invention provides a BCI (Brain-Computer Interface) system based on selective feeling. The BCI system comprises a vibrating module, wherein the vibrating module is used for providing a vibration simulation signal so as to generate a selective feeling signal; an electroencephalogram signal comprises an imagination movement signal and a selective feeling signal; a signal processing module is used for recognizing the imagination movement intention and / or selective feeling intention of a user and generating a brain-computer control signal. According to the BCI system based on the selective feeling, left-hand imagination movement and right-hand selective feeling BCI, a left-hand selective feeling and right-hand imagination movement BCI or a left-hand selective feeling and right-hand selecting BCI is additionally arranged, so that the recognition rate of the electroencephalogram signal of the user is improved, the decoding rate is improved, the brain of the user is capable of performing communication and control together with an external environment by virtue of the BCI; by virtue of combining respective advantages of different types of BCIs, a hybrid BCI is created, and the application range of the BCI is expanded.

The embodiment of the invention provides a data transmission method, network equipment, communication equipment and a storage medium. The data transmission method comprises the steps that network equipment determines a time window of a target communication equipment group, wherein the distance between two communication devices in the target communication device group is smaller than or equal to athreshold value; wherein the time window is used for enabling at least two communication devices of the target communication device group to send and receive data in the time window through a sidelink, and the network device sends first indication information indicating the time window to the at least two communication devices of the target communication device group. The distance between the twocommunication devices in the target communication device group is smaller than or equal to the distance threshold. For a communication device as a receiving end, the distances between at least two communication devices in the target communication device group and the receiving end are relatively close, so that mutual interference between data sent by the communication devices due to relatively large distance difference between the communication devices sending data in the same time window and the receiving end can be avoided, and the decoding rate of the communication devices at the receivingend can be improved.

The invention provides a segmented decoding method for scrambled network audio MP3 (moving picture experts group audio layer 3) streams and relates to the technical field of processing of audio streams. The method includes: capturing audio MP3 data packets transmitted from a network, acquiring MP3 data frames, storing in caches according to position information, setting a cache for each session, and starting audio decoding when consecutive data packets reach an appointed size; adopting an FFmpeg technique for decoding of data blocks, modifying corresponding contexts during decoding, and enabling FFmpeg to continue decoding by means of disguising. An independent printed circuit board with a plurality of acceleration units is adopted for decoding, the acceleration units are implemented by means of the FFmpeg technique, and accordingly parallel decoding can be realized; no matter in which sequence the network audio MP3 streams are received, the audio streams can be spliced and decoded to the maximum extend by taking the audio frames of a fixed quantity as a unit according to the segmented decoding method which is supportive to parallel decoding of various data streams; by adoption of the segmented decoding method, available frame count receiving rate and decoding rate of the audio streams are increased.

The invention relates to a fountain code coding and decoding method for eliminating short loops and belongs to the technical field of communication. The fountain code coding and decoding method includes: firstly, coding short-code length fountain codes at a transmitting end; secondly, generating fountain codes obtained at a receiving end at the unsuccessful decoding time into a matrix; thirdly, comparing columns of the matrix to obtain an array I and feeding the array I back to the transmitting end; fourthly, finding information source symbols corresponding to n2 element values in the array I sequentially from large to small as coding symbols, and directly transmitting the coding symbols to the receiving end for decoding participation; and finally, enabling the receiving end to use n1 coding symbols received in the step 1 and the n2 coding symbols in the step 4 to eliminate the short loops so that decoding is completed. By the fountain code coding and decoding method for eliminating the short loops, the decoding rate of the short-code length fountain codes is increased greatly, and high-probability decoding of the fountain codes with low coding expenditures is achieved.

A laser scanner for reading a bar code having a plurality of bar code elements. The laser scanner includes a digitizer which receives as an input an analog signal from photodetector circuitry and digitizes the analog signal to produce a digital bar code pattern (DBP) signal representative of the bar code. The DBP signal is input to a decoder which reads and decodes the DBP signal thereby decoding the bar code. The digitizer imposes a short duration correction impulse on the DBP signal whenever successive edges of the same polarity are sensed wherein both of the edges are above a threshold level and further wherein the second edge is of greater magnitude than the first edge. When a correction impulse is received on the DBP signal by the decoder, the decoder corrects the DBP signal by removing the first edge and toggling on the second edge.

The invention discloses an MAC (multiple access control) protocol communication method for an underwater sensor network with an asynchronous duty ratio and network coding. The method comprises the following steps: initializing an MAC protocol, and determining the data exchange time of each pair of transmitting nodes and receiving nodes; determining a coding node in a network coding layer by using a coding node selection algorithm; after the node in the network coding layer is awoken, if the node is a common node, directly transmitting out a received data pack; and if the node is a coding node, transmitting out after coding. The method disclosed by the invention has the advantage of improving the network throughput and the data transmission rate.

The invention discloses an answer sheet scoring and marking system based on an image mode, comprising an image acquisition module, a two-dimensional code detection module, a two-dimensional code identification module and a positioning point determination module, wherein the positioning points comprises a first positioning point and a second positioning point; a position judging module, a unified dividing module used for uniformly dividing the multiple-choice questions, filling in the blanks and solving the questions on the answer sheet. The answer sheet scoring and marking system based on image mode of the invention can dynamically increase according to user input, using the strategy of automatic generation of anchor points for each question, combined with image recognition to solve the problem of test paper printing distortion and black point missing caused by marking failure, by improving the accuracy of recognition to control error, recognition rate rapid declination due to printingdistortion, black point printing incompleteness can be avoided , can serve the needs of large and medium-sized examinations in schools well.

The invention provides a bidirectional cooperative access method based on adaptive multiple decoding, and comprises two parts including "network coding cooperative transmission and processing" and "network coding and decoding mode" during operation. Three new mechanisms including "coding compensation", "cooperative node selection for sending busy tone based on the number of packets" and "adaptivemultiple decoding" are adopted. The first and second new mechanisms work in the "network coding cooperative transmission and processing" part, and the third new mechanism works in the "network codingand decoding mode" part. The three new mechanisms are used, the new access method provided by the invention can enable a selected cooperative node to carry out coding operation on the own data and thereceived data, so that the coding opportunity is improved, a problem of collision caused by the hidden terminal of a candidate cooperative node is avoided, and the decoding success rate of a destination node can be improved. Therefore, the network coding technology is fully used on the whole, so that the end-to-end average time delay of a data frame is reduced, and a purpose of increasing the network throughput is achieved.

The present invention provides a method for coding and decoding a video comprising a multi-view. The method for coding a video, according to one embodiment of the present invention, comprises the steps of: determining whether a current block in a current view is to perform a residual prediction; inducing a first reference block and a second reference block used for the residual prediction of the current block, when the current block performs the residual prediction; generating a residual prediction sample value of the current block, based on a difference value between a sample value of the first reference block and a sample value of the second reference block; and inducing a prediction sample value of the current block by using the residual prediction sample value of the current block.

The invention relates to a method for improving the decoding rate of a QR code, and the method comprises the following steps: obtaining an image of a frame of QR code, carrying out the searching of aposition detection graph on the image, and recording the number of the position detection graphs and key graph information; if the number of the position detection graphs is greater than or equal to aset value, decoding; the number of the position detection graphs is smaller than a set value, conducting smoothing processing on the image, and conducting position detection graph searching processing on the smoothed image, whether the number of the position detection graphs searched after smoothing processing is larger than or equal to the set value or not is judged, conducting decoding processing if the number of the position detection graphs searched after smoothing processing is larger than or equal to the set value, and otherwise the decoding process is ended; and decoding the QR code according to the found position detection graph and the key graph information, outputting a result if the decoding is successful, judging whether the image is subjected to smoothing processing or not ifthe decoding is failed, if the image is subjected to smoothing processing, ending the decoding process, and if the image is not subjected to smoothing processing, returning to the smoothing processing step.

The invention provides a calibration method of a projection module set. The method includes the following steps that: (1) an image pickup module set is calibrated, and internal parameters are obtained; (2) reverse compensation is performed on the image pickup module set according to the internal parameters, so that a distortion-free image can be obtained; (3) the calibrated image pickup module set is adopted to capture a projection image; and (4) the internal and external parameters of the projection module set are calculated according to the captured projection image, and the calibration of the projection module set is completed. With the calibration method adopted, the decoding rate of the projection image can be greatly improved.