Analysis of the possibility of using G.729 codec for steganographic transmission
| Autor: | Jaroslaw Wojtun, Michał Ciołek, Jerzy Dolowski, Zbigniew Piotrowski |
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| Rok vydání: | 2017 |
| Předmět: |
Steganography
Adaptive Multi-Rate audio codec Computer science Speech recognition ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Codebook Code (cryptography) Codec Algebraic code-excited linear prediction Data_CODINGANDINFORMATIONTHEORY Enhanced Variable Rate Codec Algorithm Decoding methods |
| Zdroj: | SPIE Proceedings. |
| ISSN: | 0277-786X |
| DOI: | 10.1117/12.2270069 |
| Popis: | Network steganography is dedicated in particular for those communication services for which there are no bridges or nodes carrying out unintentional attacks on steganographic sequence. In order to set up a hidden communication channel the method of data encoding and decoding was implemented using code books of codec G.729. G.729 codec includes, in its construction, linear prediction vocoder CS-ACELP (Conjugate Structure Algebraic Code Excited Linear Prediction), and by modifying the binary content of the codebook, it is easy to change a binary output stream. The article describes the results of research on the selection of these bits of the codebook codec G.729 which the negation of the least have influence to the loss of quality and fidelity of the output signal. The study was performed with the use of subjective and objective listening tests. |
| Databáze: | OpenAIRE |
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