Surveillance video transmission apparatus and method and surveillance video receiving apparatus and method

A method for transmitting surveillance video, the method comprising:

• analyzing content of a collected video by recognizing the collected video and detecting an event;
• selecting one of non-encryption mode, regions-of-interest encryption mode and full video encryption mode based on the analysis result of the collected video;
• performing a first video processing, which encodes the collected video, when the non-encryption mode is selected;
• performing a second video processing, which encrypts regions in the collected video corresponding to previously set regions-of-interest and encodes the collected video including the encrypted regions-of-interest, when the regions-of-interest encryption mode is selected;
• performing a third video processing procedure, which sequentially encrypts and encodes the whole of the collected video, when the full video encryption mode is selected;
• and
• transmitting the encoded video, which is obtained through one of the first through third video processing procedures, and encryption-related information to a surveillance video receiving apparatus.

A surveillance video receiving apparatus comprising:

• a video receiving unit configured to receive an encoded video and encryption-related information which are transmitted from a surveillance video transmission apparatus;
• a decryption selection unit configured to extract encryption mode selection information from the encryption-related information and select one of non-decryption mode, regions-of-interest decryption mode and full decryption mode on the basis of the extracted encryption mode selection information;
• and
• a video process unit configured to perform one of a non-decryption, a regions-of-interest decryption and a full decryption on the encoded video according to the selected decryption mode, and store or play the decoded video.

A method for receiving surveillance video, the method comprising:

• receiving an encoded video and encryption-related information which are transmitted from a surveillance video transmission apparatus;
• extracting encryption mode selection information from the encryption-related information and selecting one of non-decryption mode, regions-of-interest decryption mode and full decryption mode on the basis of the extracted encryption mode selection information;
• and
• performing a first video processing, which decodes the collected video, when the non-decryption mode is selected;
• performing a second video processing, which decodes the encoded video and decrypts regions-of-interest within the decoded video, when the regions-of-interest decryption mode is selected;
• performing a third video processing, which sequentially decodes and decrypts the whole of the encoded video, when the full video encryption mode is selected;
• and
• performing one of storing and playing on the decoded video obtained through one of the first to third video processing.