7results about How to "Reduce decoding time" patented technology

The application discloses a real-time video playing method in QT environment, which comprises the following steps: S1, creating a compiling environment; S2, making a transmission service rule; S3, initializing ffmpeg stream pulling and decoding resources; S4, creating a stream pulling main thread; S5, decoding a data packet object obtained by stream pulling; S6, converting a decoded image frame; S7, obtaining the converted image frame and displaying in real time; and S8, releasing decoding channel resources. The application adopts a soft decoding method, effectively reduces decoding time, simultaneously adopts an RTSP video transmission protocol to obtain a video stream, effectively reduces playing delay, and guarantees video playing fluency.

This application provides an encoding and decoding method and related apparatus for non-volatile memory. The encoding method uses the least common multiple of the primitive polynomial of the primitive elements of a finite field and its inverse polynomial as the generator polynomial. The decoding method includes: reading the received sequence and calculating its initial syndrome; if the initial syndrome is not 0, an error exists; adjusting the value of each bit data to obtain two flipped syndromes: a first flipped syndrome and a second flipped syndrome; if both the first and second flipped syndromes are 0, or the product of the first and second flipped syndromes is 1, then it is determined that the bit will be flipped. This application can decode bit by bit in parallel according to the flipped syndrome. Compared with the BCH code error correction scheme, the generator polynomial is different, avoiding high-order power operations of finite field elements during decoding, reducing decoding complexity and decoding delay, and meeting the requirements of fast decoding.

This disclosure provides embodiments of a video encoding / decoding and display method, apparatus, electronic device, and computer-readable medium. One specific implementation of the method includes: splitting each video frame to be encoded to obtain a set of video frame blocks; determining a set of video frame block encoding channels that meet interrupt triggering conditions; performing key video frame block peak shifting processing on each video frame block to be encoded to obtain a set of key video frame encoding blocks and a set of channel delay encoding time differences; performing video encoding on each video frame block to be encoded to obtain a set of video frame block channel bitstreams; determining the decoding and splicing threads for the video frame block channel bitstream set to obtain a set of decoding and splicing threads; performing video frame block decoding and splicing on the video frame block channel bitstream set to obtain a decoded video; and performing video frame display processing on the decoded video. This implementation can improve the balance of the bitstream after video encoding, improve the stability and real-time performance of transmitted video, and reduce video transmission latency.

The application relates to the technical field of motor control, and particularly discloses a resolver software decoding method based on an MCU and a device thereof, the decoding device comprising an MCU, an amplification circuit, two conditioning circuits, two multipliers and two low-pass filters; the MCU comprises a timer, a DAC module, a first ADC module and a second ADC module; the DAC module is connected with a primary side winding of a resolver, a first input end of a first multiplier and a first input end of a second multiplier through the amplification circuit; two secondary side windings of the resolver are connected with a second input end of the first multiplier and a second input end of the second multiplier; and an output end of the first multiplier is connected with the first ADC module through a first filter and a first conditioning circuit, and an output end of the second multiplier is connected with the second ADC module through a second filter and a second conditioning circuit. The application can reduce the cost of a resolver shaft angle calculation system and realize high-precision shaft angle calculation.

The application discloses a video decoding real-time playing method in QT environment, which comprises the following steps: S1, creating a compiling environment; S2, initializing ffmpeg stream pulling and decoding resources; S3, creating a stream pulling main thread; S4, decoding a data packet object obtained by the stream pulling; S5, carrying out format conversion on the decoded image frame; S6, obtaining the image frame after the format conversion and displaying in real time; and S7, releasing the decoding channel resources. The application adopts a soft decoding method, effectively reduces the decoding time, simultaneously adopts an RTSP video transmission protocol to obtain a video stream, effectively reduces playing delay, and guarantees the fluency of video playing.

This invention relates to the field of QR code technology, specifically to a character code generation method, decoding method, and apparatus. The method includes: acquiring text to be encoded and converting it into information to be encoded through an encoding mode; creating a scanning area and filling the scanning area with target text, wherein the version of the scanning area is determined based on the size of the target text and the size of the information to be encoded; splitting the information to be encoded into one or more data modules; matching candidate filling positions for each data module by traversing the outline formed by the strokes of the target text according to the size of the split data modules; and filling each data module into its corresponding filling position after a successful match. This invention provides a QR code encoding and decoding method that can be recognized by both machines and the human eye. Each character has a fixed outline path formed by strokes, and by changing the control points on the outline to embed encoding information, machine recognition and human eye recognition are combined.

The invention relates to a burst error list decoding method of an RS code based on G-FFT. The burst error list decoding method comprises the following steps: initializing parameters, constructing the RS code, folding a receiving vector, carrying out G-IFFT conversion, decoding an IRS code matrix obtained by conversion, carrying out G-FFT conversion, unfolding an obtained inverse matrix, and carrying out burst error screening to generate an output sequence. According to the invention, the problem of burst error list decoding of RS codes is converted into the problem of burst error list decoding of IRS codes by using G-FFT, so that the error correction performance of the RS codes is enhanced. According to the method, the limitation of the prior art is broken through, the burst error can be corrected under the condition of reaching the Single boundary, and when the code length is n, the decoding complexity of the method is only quasi-linear time O (nlogn). The improvement significantly improves the decoding efficiency and reliability, and has important practical application value for a high-speed communication system.