The Theory And Application Of Audio Information Hiding

Audio information hiding applies to secret communication and digital right protection. Supported by the National Natural Science Foundation under grant number 90604022 and the Beijing Natural Science Foundation under grant number 4062025, the algorithms of audio information hiding and application to digital rights management are researched in the dissertation. The main work that is presented in this dissertation is below:a) Designing robust audio watermarking algorithm applying to digital right protection. Synchronic digital audio watermarking algorithm based on quantizing wavelet domain parameters is presented, experimentations show the algorithm is robust to several attacks such as Guass-yawp, lossy compression, re-quantization and re-sampling. A watermarking algorithm for MIDI file is presented based on the principle of modifying instruction. The algorithm can be applied to right protection for MIDI file. Unsymmetrical audio watermarking algorithm is researched. An unsymmetrical audio watermarking algorithm and the method of increasing capacity of the algorithm are presented.b) Designing algorithms of steganography and steganalysis for MP3 file applying to secret commnication. A steganography algorithm for MP3 file is presented which has the characteristics of low complexity, imperceptibility, big capacity, it is based on Huffman codes in III layer compression standard. Presenting an efficient detection algorithm for MP3Stego steganography tool.c) In order to transmit secret information, a speech hiding algorithm which is robust...