Digital video transcode detection method
A digital video and detection method technology, applied in the field of digital video resource transcoding detection, can solve the problems of destroying the originality and authenticity of the video, difficult to judge the authenticity of the video resource, destroying the copyright protection of the original video, etc.
Inactive Publication Date: 2013-04-10
TIANJIN UNIV
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Problems solved by technology
After some copyright-protected video resources are transcoded and compressed, the copyright protection information will be lost or damaged, and the originality of the video resources will be difficult to verify; at the same time, people can also perform a series of tampering during the transcoding process Operations, such as region copy and deletion, make it difficult to judge the authenticity of video resources
The video transcoding process may destroy the copyright protection of the original video and perform other tampering operations, destroying the originality and authenticity of the video. Therefore, detecting whether the digital video has been transcoded is an important basis for verifying the originality of the video
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[0046] figure 1 An overall flowchart illustrating the video transcoding detection system of the present invention. In step A, the video resource is completely decoded through the data analyzer, and the image content data in it is obtained, including information such as reconstruction DCT coefficients, quantization scale factors, motion vectors, motion errors, and pixel values. In step B, model the DCT coefficients, motion vectors, and motion errors respectively, and draw corresponding curves. In step C, feature analysis is performed on statistics of video data, various feature quantities are extracted, and finally feature vectors are synthesized. In step D, video resources are classified into two categories by a classifier with mature technology: transcoded and compressed video resource files and original compressed video resource files.
[0047] The data statistical modeling module first divides the data into three types of data sets: intra-frame coding frame (I frame) data...
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The invention belongs to the technical field of video detection, and relates to a digital video transcode detection method. The method comprises the following steps: building a sample bank; carrying out complete decoding to video data in a video file and obtaining relevant digital video content data in the video file, and building a video file dataset; carrying out respective data modeling to a discrete cosine transformation (DCT) coefficient of all frames and a motion vector and a motion error of a P frame and a B frame, and carrying out feature extraction to the dataset, wherein five features are extracted, namely a periodic feature and a singular point of a DCT curve, an image resampling feature, motion vector similarity and motion error curve periodicity; forming a feature vector, and building a classifier and carrying out training; reading a to-be-detected video file and obtaining a feature vector, and carrying out classification detection to the detected video data using the classifier. By means of the digital video transcode detection method, any pre-process, like adding digital watermarking information and the like, is not needed to a digital video, and the digital video transcode detection method has the advantages of being strong in practicability and small in calculated quantity.
Description
Technical field [0001] The invention belongs to the technical field of video detection, and in particular relates to a digital video resource transcoding detection method, which judges the authenticity of the digital video resource by analyzing whether the video resource is transcoded from other video resources. Background technique [0002] In the past few decades, digital video coding technology has been changing with each passing day, developed rapidly, and has been widely used, such as network video transmission, digital video broadcasting (DVB), digital video disc (DVD), digital video camera, video conferencing, distance teaching, etc. Just some typical examples. Different application scenarios have different requirements for video codecs, video data storage formats, network transmission equipment, etc., and the coding standards formulated for specific fields are also different. The H.26x standard is mainly used in occasions such as video telephony and video conferenci...
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Login to View More IPC IPC(8): G06T7/00G06T7/20H04N7/26H04N19/40
Inventor徐俊瑜苏育挺
OwnerTIANJIN UNIV