TY - CONF T1 - Exploring compression effects for improved source camera identification using strongly compressed video T2 - Image Processing (ICIP), 2011 18th IEEE International Conference on Y1 - 2011 A1 - Chuang,Wei-Hong A1 - Su,Hui A1 - M. Wu KW - camera KW - cameras;video KW - coding; KW - compression;computer KW - compression;video KW - estimation;photoresponse KW - forensics;data KW - identification;video KW - non-uniformity;reliability;source KW - PRNU AB - This paper presents a study of the video compression effect on source camera identification based on the Photo-Response Non-Uniformity (PRNU). Specifically, the reliability of different types of frames in a compressed video is first investigated, which shows quantitatively that I-frames are more reliable than P-frames for PRNU estimation. Motivated by this observation, a new mechanism for estimating the reference PRNU and two mechanisms for estimating the test-video PRNU are proposed to achieve higher accuracy with fewer frames used. Experiments are performed to validate the effectiveness of the proposed mechanisms. JA - Image Processing (ICIP), 2011 18th IEEE International Conference on M3 - 10.1109/ICIP.2011.6115855 ER -