2018
DOI: 10.1117/1.jei.27.1.013031
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Detecting double compressed MPEG videos with the same quantization matrix and synchronized group of pictures structure

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Cited by 8 publications
(2 citation statements)
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“…However, if there are more images available from the same, unknown source, e.g. the frames in a video file [ [49] , [50] , [58] , [91] , [92] , [93] , [94] , [95] , [97] , [98] ], much better estimations of the PRNU pattern can be obtained by averaging techniques. In the newer cameras one has to compensate for motion compensation [ 82 , 84 , 88 , 90 ].…”
Section: Camera Identification Of Images and Videomentioning
confidence: 99%
“…However, if there are more images available from the same, unknown source, e.g. the frames in a video file [ [49] , [50] , [58] , [91] , [92] , [93] , [94] , [95] , [97] , [98] ], much better estimations of the PRNU pattern can be obtained by averaging techniques. In the newer cameras one has to compensate for motion compensation [ 82 , 84 , 88 , 90 ].…”
Section: Camera Identification Of Images and Videomentioning
confidence: 99%
“…Proponen detectar la compresión doble de MPEG con el mismo QS. La extracción de características se produce durante la compresión repetida del vídeo en el mismo factor de calidad.En[28] analizan la degradación que se produce durante una recompresión encontrando que la variación de las características de un vídeo tienden a estabilizarse tras múltiples recompresiones.En[29] estudian los efectos de la recompresión en los fotogramas predictivos para generar un vector de características con el cual detectar doble compresión a nivel GOP.Para un vídeo ordinario (descargado de Internet o grabado con ciertos dispositivos móviles), la presencia de signos de doble compresión puede no ser sospechosa pero tampoco…”
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