HD급 셋톱박스에서 MPEG 스트림의 복호화 기법

초록

Nowadays, according as the distribution and duplication digital contents has been made easily, we need to encrypt contents before transmission and we should allow certified user to only access the decrypted contents. In this paper, we propose a decryption method of encrypted MPEG stream in HD set-top box. The process passes through entropy decoding, decryption, entropy encoding and transfer stream into MPEG stream buffer. The experimental result shows that the decryption process does not affect video output in real time.