39results about How to "Solve confidentiality issues" patented technology

The application discloses a kind of dynamic controllable video encoding method and device, method includes introducing controllable coding module in video acquisition end, control is carried out to the real-time switching of video stream in combination with encryption control signal;Using encrypted video platform, the coding control instruction including non-encryption encoding instruction and encryption encoding instruction is issued through network control interface;Video encoding is carried out using layered coding strategy;When video does not need to be encrypted, non-encryption encoding mode instruction is issued by platform;When video needs to be encrypted, encryption encoding mode instruction is issued by platform, and video acquisition terminal switches to encryption mode;In encrypted video platform client, corresponding session key is obtained from key management module according to session identification in video frame header, received encrypted video stream is decrypted and played, and decryption end adopts frame-level decryption strategy, only complete decryption is carried out to key frame, and prediction frame is reconstructed by referring to decrypted frame, effectively solve the problem of video security and video sharing.