Patent ID: 11025866

Abstract:
A network separation device that can separate an internal network and an external network with little changes in the networks in a video surveillance system providing monitoring picture data through the internal network and the external network. The network separation device receives monitoring picture data from a monitoring camera that acquires a monitoring picture, transmits outbound picture data unidirectionally to an external network client through an external network in response to a request of the external network client, and transmits inbound picture data to an internal network client through an internal network in response to another request from of the internal network client. The network separation device includes: a raw data extraction unit configured to receive the monitoring picture data and extract raw picture data from the monitoring picture data; a unidirectional data generation unit configured to receive the raw picture data and generate a unidirectional data by controlling a data flow of the raw picture data such that the raw picture data is transferred in one predetermined direction only; a first picture data generator configured to generate the outbound picture data by encoding the unidirectional data according to a first coding scheme; and a second picture data generator configured to generate the inbound picture data by encoding the unidirectional data according to a second coding scheme.