Patent ID: 11882299
Assignee: NATIONAL UNIVERSITY OF DEFENSE TECHNOLOGY
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  Y | IPC G  H

Claim 5:
6. The predictive contrastive representation method according to claim 5, wherein the step of sampling the prediction situational label data according to the corresponding optimal loss in the predictive contrastive loss function to obtain the sampling probability of the positive sample comprises:
sampling the prediction situational label data according to the corresponding optimal loss in the predictive contrastive loss function to obtain the following sampling probability of the positive sample:, p
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wherein i denotes a serial number of the positive sample, j denotes a serial number of the negative sample, N denotes a total number of negative samples, p(st|ct) denotes a joint distribution probability of situational information si in the positive sample and the temporal coding information ct at the current moment, p(si) denotes an occurrence probability of the situational information si in the positive sample, p(sj|ct) denotes a joint distribution probability of situational information sj in the negative sample and the temporal coding information ct at the current moment, and p(sj) denotes an occurrence probability of situational information sj in the negative sample.