Digital audio watermarking algorithm for copyright management

Abstract

The invention relates to a method for performing copyright management by utilizing digital audio watermarking. The method comprises the following steps: embedding a watermarking signal in a logarithm domain of the audio signal energy so that the decoding is unrelated to the amplitude; reasonably designing the frame structure of the embedded watermarking information so that the timing statistical accuracy of a de-embedded result reaches second, and the decoding time accuracy and decoding accuracy rate are not influenced under the operations of cutting, splicing and inserting other audio signals and the like; encrypting the embedded information by an RSA (Asymmetric Algorithm) digital signature algorithm so that the embedded information has security; and effectively reducing interference ofthe carrier audio to the watermarking information by the embedding algorithm by using the relativity of the short-time stability of the audio so as to obviously improve the success rate and accuracy rate solved by the watermarking. In the method, a digital watermarking technology is introduced to identify the audio materials in a medium library, and then the broadcast flow or audio file are decoded and analyzed to obtain the service conditions of materials, thereby acquiring copyright payment information.

Description

technical field [0001] The invention proposes an audio watermark algorithm for copyright management of media assets. Background technique [0002] As an important direction in the field of information security technology, digital audio watermarking technology has been widely used in authenticating multimedia sources, conducting ownership authentication and tracking unauthorized behavior, and has a very broad application prospect [1] . During the production process of radio and television programs, it is hoped that the use of multimedia materials can be statistically analyzed in a timely manner, so as to manage the use of media materials and copyrights. By adding watermark information used to identify specific materials in multimedia materials, and then obtaining the use of related materials through watermark decoding, it can provide more convenient and powerful support for the media asset management process. [0003] Based on actual needs, we need the watermark to have the...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the fact that the robustness and time accuracy of the embedded watermark information in the current algorithm are not high, and the watermark information is seriously lost after random cutting and splicing operations of multimedia editing, which makes it difficult to embed the embedded watermark information. Watermark information analysis to obtain the use of multimedia materials for accurate statistics and other issues, the present invention proposes an audio watermark algorithm for media copyright management

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