Broadcasting server system for protecting and managing digital broadcasting contents and an operation method thereof

A method for operating a broadcasting server system for protecting and managing digital broadcasting contents, the method comprising the steps of:

• a) generating access control information and a control word based on subscriber information, the access control information including CAT, entitlement control message (ECM) and entitlement management message (EMM);
• b) generating additional data including use control metadata, tool information metadata and content purchase information metadata to protect and manage the digital broadcasting contents;
• c) receiving an identification of a broadcasting content, which is referred to as a content ID, and the use control metadata and watermarking an audio/video (A/V) media signal by using the content ID and the use control metadata as watermarks, the use control metadata including copy control information (CCI), broadcasting flag (BF) and retention information (RI);
• d) compressing the watermarked A/V media signal;
• e) encrypting the compressed A/V media signal;
• f) receiving and multiplexing the compressed and encrypted A/V media signal to thereby output a media transport stream;
• g) receiving and re-multiplexing the media transport stream, the additional data and the access control information to thereby output a re-multiplexed signal;
• and
• h) scrambling the re-multiplexed signal by using the control word.

A computer-readable recording medium for recording a program that implements a method for operating a broadcasting server system that protects and manages digital broadcasting contents, comprising the steps of:

• a) generating access control information and a control word based on subscriber information, the access control information including CAT, entitlement control message (ECM) and entitlement management message (EMM);
• b) generating additional data including use control metadata, tool information metadata and content purchase information metadata to protect and manage the digital broadcasting contents;
• c) receiving an identification of a broadcasting content, which is referred to as a content ID, and the use control metadata and watermarking an audio/video (A/V) media signal by using the content ID and the use control metadata as watermarks, the use control metadata including copy control information (CCI), broadcasting flag (BF) and retention information (RI);
• d) compressing the watermarked A/V media signal;
• e) encrypting the compressed A/V media signal;
• f) receiving and multiplexing the compressed and encrypted A/V media signal to thereby output a media transport stream;
• g) receiving and re-multiplexing the media transport stream, the additional data and the access control information to thereby output a re-multiplexed signal;
• and
• h) scrambling the re-multiplexed signal by using the control word.