Method and system for identifying multimedia files

Abstract

The invention provides a method and system for identifying a multimedia file. The method comprises the steps of judging the type of a current multimedia file to be identified; extracting a key frame of a video file, and obtaining an image file to be identified; performing two-dimensional DCT transformation on the image file, and extracting a file characteristic of the image file; performing DWT transformation on an audio file, and extracting a file characteristic of the audio file; and performing exclusive or processing on a file characteristic of the current multimedia file and a watermark ciphertext, and acquiring and storing a zero watermarking of the multimedia file. The system comprises a multimedia file type judgment module, a video characteristic acquisition module, an image characteristic acquisition module, an audio characteristic acquisition module and a zero watermarking acquisition module. The method and the system for identifying the multimedia file provided by the invention realize encryption identification of multimedia files of multiple types on the basis of not modifying original multimedia data, so that the process of identifying the multimedia files is accurate and comprehensive, thereby realizing the effective and reliable protection of multimedia copyright.

Description

technical field [0001] The invention relates to the technical field of urban rail transit, in particular to a method and system for marking multimedia files. Background technique [0002] With the development of science and technology and the continuous improvement of human life, multimedia technology has been more and more widely used, and multimedia (such as video, audio, image, etc.) information is also playing an increasingly important role in our daily life. As a result, the protection of video property rights has gradually become the focus of people's research. As a new digital watermarking technology that does not modify the original video image data, zero watermarking has attracted widespread attention. However, the development of zero watermark technology is not yet mature enough. As a complex communication medium, video is highly variable. We still need to study a lot, and it is impossible to make video, audio and image watermarks overcome common compression and g...

AI Technical Summary

Problems solved by technology

However, the development of zero watermark technology is not yet mature enough. As a complex communication medium, video is highly variable. We still need to study a lot, and it is impossible to make video, audio and image watermarks overcome common compression and geometric attacks.

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