Novel method of digital watermarking for protecting literary property of music works

Abstract

The invention belongs to an information safety, multimedia information processing field, in particular, the invention is a new digital watermark method for protecting copyright of a music production, mainly comprises a synchronization code, a watermark embedding and detecting. At first, the invention performs information embedding by segmenting the music production and dividing each music data segment into two front and rear portions. The synchronization code is embeded into the front portion by modifying a statistical average value of a plurality of sampled values, and the rear portion is used for embedding watermark information, the embedding process comprises: performing DWT on the music data segments, then performing DCT on low-frequency coefficients in a wavelet field, embedding the encrypted watermark information in the low / middle frequency coefficients of the DCT field by a self-adaptive quantization method, finally obtaining the digital music production with embeded watermark information by a reverse converting process and re-combining the music data segments. Detecting the digital watermark is a reverse process of the embedding process. The invention can be used in music productions of different types independent of adjustment of a threshold value.

Description

technical field [0001] The invention belongs to the technical field of information hiding and digital watermarking in multimedia information security, and specifically relates to a new method of digital audio watermarking, which can effectively resist the very difficult time-domain synchronization attack in audio watermarking technology, and has great significance for the copyright protection of music works. practical value. Background technique [0002] With the rapid development of network technology (especially Internet technology) and multimedia information processing technology, the protection of intellectual property rights of digital works has become a key problem that needs to be solved urgently. In this background, digital watermarking technology has been widely concerned by people, and has become a hot spot in the field of network information security research. According to the scope of application, digital watermarking can usually be divided into image watermarki...

AI Technical Summary

Problems solved by technology

However, most of the current watermark embedding methods based on the synchronization code scheme have the following deficiencies: (1) the length of the Barker code used is too short, which can easily cause false synchronization and affect the robustness of the synchronization signal; (2) only the synchronization code is embedded in the On a single sample value of digital audio, the ability to resist attacks is greatly reduced (especially attacks such as resampling and MP3 compression); (3) the quantization step size cannot be determined in combination with the auditory masking characteristics (that is, a fixed watermark embedding depth is adopted) , affecting the imperceptibility of digital watermarking

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