Method for embedding authentication information of numeric music works

Abstract

An embedment and extraction method for identification information of digital music works is disclosed that characterized in that the whole processing procedure is divided with decomposition module, lengthen coding processing module, watermark processing module, and output module. The watermark is embedded on lengthen coding zone, the method of lengthen coding space expansion is adopted to realized the lossless identification information embedment of the master data of the lengthen coding. The advantages of the invention are following: amount of information of carrier is great, the effect of the side information parameters which is important to decoding can be avoided, free of the tone quality damage can be assured, the extraction of the identification information and decoding of the variable-length code are fused, watermark extraction can be proceeded with the coding at the same time, so the risk of decoding replaying after the identification is out of consideration.

Description

technical field [0001] The invention relates to an authentication method of a digital music work, in particular to a method for embedding and extracting authentication information of a digital music work. Background technique [0002] MP3 is the abbreviation of MPEG-1 Audio Layer 3, which was developed by MPEG (Moving Picture Experts Group, Moving Picture Experts Group) co-sponsored by ISO (International Standards Organization) and IEC (International Electronic Committee, International Electrotechnical Society) An audio compression technique. In 1987, Fraunhofer IIS-A, a German research institution, began to participate in a sub-project EU147 of the Eureka Project on Digital Audio Broadcasting (DAB). In the process of cooperation with Professor Dieter Seitzer of the University of Erlangen, they invented and designed an algorithm with strong compression ability, which uses advanced "perceptual noise modeling" (Perceptual Noise Shaping) technology. In a standard way (128kbps...

AI Technical Summary

Problems solved by technology

These watermark embedding methods have some common shortcomings, that is, the embedding of the watermark is irreversible to the modification of the MPEG compressed stream, which will affect the sound quality of the MPEG audio; in addition, the strength of the watermark embedding is very small, and the authentication is separated from the decoding of the work. Once authenticated, the decrypted work loses its protection and cannot prevent the watermarked MPEG audio from being illegally copied

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