Journal of Korea Multimedia Society (한국멀티미디어학회논문지)

Korea Multimedia Society (한국멀티미디어학회)
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An Information Security Scheme Based on Video Watermarking and Encryption for H.264 Scalable Extension

H.264 Scalable Extension을 위한 비디오 워터마킹 및 암호화 기반의 정보보호 기법

  • Received : 2011.01.05
  • Accepted : 2012.03.05
  • Published : 2012.03.31
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Abstract

Recently, H.264 SE(scalable extension) has become a standard of next generation multimedia service which is one source, multi-user service in the telecommunication environment of different kinds of networks and terminal equipments. But existing DRM schemes for multimedia service are not fit for H.264 SE system. Because the amount of transmitted multimedia data is changed considering network environment and terminal equipments' performance by the system, but in the existing DRM schemes, the amount of handled multimedia data are not variable according to network environment and terminal equipments' performance. In this paper, an information security scheme combined video watermarking and encryption is presented for H.264 SE. Amount of watermarks and embedding positions are calculated by the frame number of enhancement layers which are created according to the state of networks and terminal equipments. In order to minimize delayed time by video watermarking and encryption, the video data are watermarked and encrypted in the H.264 SE compression process. In the experimental results, we confirmed that proposed scheme is robust against video compression, general signal processing and geometric processing.

최근, 이종 단말 및 네트워크간의 통신 환경에서도 one source, multi-user 서비스를 지원하기 위한 H.264 SE(scalable extension)가 차세대 멀티미디어 서비스를 위한 표준으로 자리매김 하고 있다. 하지만, 기존의 DRM 기법들은 네트워크 전송 환경 및 단말의 성능에 따라 전송 데이터 량을 가변하는 H.264 SE 시스템에는 합하지 않다. 본 논문에서는 H.264 SE에 적합한 비디오 워터마킹과 암호화 기법을 결합한 정보보호 기법을 제안한다. 제안 논문에서 워터마크 삽입량 및 삽입 위치는 네트워크 및 단말의 상태에 따라 결정되는 enhancement layer들이 포함하는 프레임 수를 이용해 계산된다. 또한 비디오 워터마킹과 데이터 암호화로 인해 발생하는 비디오 부호화 과정에서의 시간지연을 최소화하기 위해 두 과정을 비디오 압축 시 동시에 수행한다. 실험 결과, 본 제안 기법은 비디오 압축 및 일반 신호 처리, 기하학적 처리에 강인함을 확인하였다.

Keywords

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