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SVC 비디오 스트리밍을 위한 계층적 암호화 제어 기법

Control of Layered Encryption for SVC Video Streaming

  • 투고 : 2010.01.27
  • 심사 : 2010.03.11
  • 발행 : 2010.07.30

초록

최근 다양한 서비스 환경에 대해 적응적인 비디오 품질을 제공할 수 있는 계층 부호화 기술인 SVC 압축 기법의 표준화가 완료되었다. 본 논문에서는 SVC의 비디오 계층간 중요도의 특성을 고려하여 목표로 하는 일정한 계산 복잡도로 암호화 복잡도를 제어할 수 있는 계층적 암호화 기법을 제안한다. 특히, 다양한 서비스 환경에 대해 적응적인 SVC 비디오의 NAL unit의 계층적 분류에 따른 NAL unit의 중요도 분석과 그 중요도에 적합한 암호화 강도를 적용하는 기법을 제안한다. 암호화 시간에 대한 제어 능력과 부적합한 해독키에 의해 재생된 영상의 화질 비교를 통해 제안된 계층적 암호화 기법의 성능이 우수함을 검증한다.

Recently, the standardization of SVC technology which can provide adaptive video quality in diverse service environments has been completed. This paper proposes a layered encryption technique which takes into account the prioritized layer characteristics of SVC and control constant encryption complexity satisfying the target computational complexity. In particular, it analyzes the importance of NAL unit in the SVC video layer and suggests a method to apply appropriate encryption complexity proper for it. The effectiveness of the proposed method is proved through the comparison of time required for encryption and the reconstructed video quality using imperfect decryption key.

키워드

참고문헌

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