Parameter-adaptive multidimensional bit rate control method based on video content characteristics

The invention relates to the field of video decoding, in particular to a parameter-adaptive multidimensional bit rate control method based on video content characteristics. The method comprises the following steps: determining an initial coding frame rate according to a channel bandwidth and an initial frame complexity of a video sequence; determining a model parameter update cycle according to a dynamically transformed video, and extracting a video time-space complexity from a sliding window of the current update cycle; meanwhile, determining the length of the next update cycle by combining the bit rate control accuracy of the current update cycle, and updating the multidimensional bit rate control model parameters and the coding parameters. The parameter-adaptive multidimensional bit rate control method based on video content characteristics is superior to internationally similar relevant methods, can effectively improve the subjective quality and objective quality, especially for the video sequence with high time-space complexity, and can slightly reduce the computational complexity.