50results about How to "Guaranteed decoding performance" patented technology

The invention discloses a video decoding method and device and a storage medium, and the method comprises the steps: obtaining the target type information of a target video when a play instruction ofthe target video is received; acquiring specified type information of a plurality of decoders configured by the terminal; determining a target decoder supporting decoding of the target video in the plurality of decoders by comparing the specified type information of the plurality of decoders with the target type information; and decoding the target video by adopting a target decoder, and playing the decoded video. The embodiment of the invention provides a method for adaptively selecting a target decoder, which does not directly adopt a default decoder to decode a target video, but selects thetarget decoder supporting decoding of the target video by comparing the specified type information of a plurality of decoders with the target type information. By adopting the target decoder to decode the target video, the problem of decoding failure can be avoided, the success rate of video decoding is improved, and the success rate of video playing is further improved.

The invention discloses a method for transmitting the antenna information of a physical broadcast channel and is applied in a wireless communication system, and according to the transmission antenna number of the physical broadcast channel and which time the current sending belongs to in a period, a sending end selects a corresponding scrambling sequence for implementing the scrambling of original information bits, generates a cyclical redundancy check (CRC) code, and sends out the CRC code together with the data; wherein, two antennas and four antennas are corresponding to different scrambling sequences. The method of the invention can well detect the antenna information of the physical broadcast channel and is characterized in that the two situations with two antennas and four antennas are well differentiated, thus ensuring the decoding performance of other physical channels.

The invention relates to the field of communication and discloses a signal detection device and method. According to the signal detection device and method disclosed by the invention, as the in-phase branch demodulation output end of a Costas loop not only is coupled with a bit synchronization device but also needs to be coupled with a code phase tracking device, the change condition of the bit cycle of bi-phase mark data is detected in real time by utilizing the code phase tracking device, and when a code phase is deviated, error correction is performed on the code phase in time so as to ensure the decoding correctness of the bi-phase mark data. The problem that a radio data system / radio broadcast data system (RDS / RBDS) signal cannot be correctly decoded because the number of sampling points of the bi-phase mark data in a unit cycle is changed because of the factors such as the stability of a transmitter crystal oscillator, a Doppler effect and the drifting of a receiver crystal oscillator is effectively solved, and therefore, the RDS / RBDS data demodulation is at a correct bit boundary position all along.

The invention provides a method and terminal for adjusting HARQ buffer memory amounts, and relates to the technical field of communication. The method comprises the steps of reducing the rated HARQ buffer memory amounts of code blocks according to the rated proportions, then judging whether the HARQ buffer memory amounts after reduction are within a preset threshold range or not, if the HARQ buffer memory amounts after reduction are within the preset threshold range, only saving a part of encoding information, setting the rated proportions to guarantee that the encoding performance of the encoding information after reduction can not be greatly reduced, and then setting the threshold range to limit the condition for reducing the HARQ buffer memory amounts. By means of the technical scheme, under the condition that the encoding performance is ensured, the HARQ buffer memory amounts can be reduced in use. The method and terminal for adjusting the HARQ buffer memory amounts are mainly applied to the processes of turbo encoding and decoding and transmission of related information.

The invention provides a method for realizing the equalization of an FBMC system by utilizing improved sphere decoding algorithm, which comprises the following steps: by setting up an FBMC system model, and defining FBMC system parameters, analyzing the main factors of the equalization algorithm performance affecting the FBMC system; carrying out the improved sphere decoding algorithm; and carrying out simulation experiments for the algorithm and comparing; and analyzing simulation results. The improved sphere decoding algorithm means that the equalization of the FBMC system can be realized by lowering the complexity of the sphere decoding algorithm, and comprises the following steps: defining the equalization of the FBMC system; and realizing the equalization of the FBMC system by the method of probability estimate of d'2-LB (k-1) >= | | zk: M-Rk: M, K: Mbk: M | | 2 to lower the complexity of the sphere decoding algorithm. The invention utilizes the improved decoding algorithm to lower the bit error rate and the complexity of equalization algorithm of the FBMC system, and carries out verification by the simulation experiments, and the simulation results show that the improved decoding algorithm obviously lowers the complexity of the algorithm, has less loss of performance, has higher superiority and better meets the requirements of modern communications for real-time signal processing particularly when the signal to noise ratio is smaller, and has good prospects for development.

The invention provides a set based unequal protection decoding method and system. The method comprises that symbol information vectors are divided into different types according to element confidencetherein; and the different types of symbol information vectors are divided into different sets, and decoding is carried out in the unit of set. The method and system can be mainly used to reduce the computing complexity of variable nodes. The sets are divided reasonably and proper unequal protection thresholds are used, so that the decoding efficiency can be improved on the premise that the decoding performance is ensured.

The embodiment of the invention discloses a Viterbi decoding method and a Viterbi decoder. The Viterbi decoding method comprises the following steps: receiving input two-path data; calculating the received two-path data according to a state transfer rule of a state transfer butterfly pair to obtain a branch metric value of each state; performing ACS (add-compare-select) processing in parallel on the path metric values of 16 states at the previous moment aiming at 8 state transfer butterfly pairs each time by use of the calculated branch metric value; storing the path metric value of each state obtained by the ACS processing as well as the state transfer relationship mark of the path metric value; comparing the stored path metric value of each state and searching for the greatest path metric value; and backtracking the greatest path metric value according to the stored state transfer relationship mark, and outputting the decoding result. According to the technical scheme provided by the embodiment of the invention, the decoding speed is effectively increased on the premise of ensuring the decoding effect of the Viterbi algorithm.