Audio watermarking method based on MP3 encoding principle

Abstract

The invention discloses an audio watermarking method based on the MP3 encoding principle, which belongs to the technical field of multimedia digital watermarks. The method includes two processes, i.e. watermark embedment and watermark extraction; a watermark is embedded into a low-frequency MDCT (Modified Discrete Cosine Transform) coefficient as an encoding process is carried out synchronously; in order to enhance the robustness of the watermark, an appropriate audio segment is chosen in combination with the frequency domain masking effect in a human auditory system to be embedded; and in order to resist desynchronization attacks, a synchronization mechanism is introduced. By processing the encoding process, the method fulfills the injection of the watermark, and the method can effectively resist common audio attacks, and also has good robustness on desynchronization attacks (such as shearing attacks, time scaling and the like). While taking audio watermark robustness into consideration, the method guarantees the auditory invisibility of audio contents, the computational complexity of the algorithm is low, and the method is easy to implement.

Description

technical field [0001] The invention belongs to the technical field of multimedia digital watermarking, and in particular relates to an audio watermarking method based on the principle of MP3 encoding. Background technique [0002] In recent years, with the mass production and distribution of digital music products, especially the popularity of MP3, the importance of digital audio product copyright protection has become increasingly prominent, and digital watermarking technology has emerged as the times require. [0003] The sensitivity of the human auditory system (HAS) and the variety of audio editing software on the Internet make the research on audio watermarking more challenging. In recent years, various algorithms based on time domain, frequency domain and compression domain have been proposed for audio watermarking. The time-domain audio watermarking algorithm has low computational complexity and is easy to implement, but its resistance to attacks is poor. The basic...

AI Technical Summary

Problems solved by technology

A variety of synchronization codes have been proposed to resist desynchronization attacks, such as exhaustive search, display synchronization, and constant watermarks. Although these methods have reduced the impact of desynchronization attacks on watermark extraction to a certain extent, they still have limitations.

The designed algorithm can resist a specific desynchronization attack, but it is still not effective against other deliberate attacks

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