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This paper presents a simple and effective steganography approach applied to 5.3 Kbps G.723.1 low-rate coded speech, based on analyzing the redundancy of coded parameters. Augmented identity matrix is used to reduce the modification to cover speech and enhance the imperceptibility of the mixed speech correspondingly. The scheme is with good transparency and low computational complexity, which is easy...
The adaptive multirate wideband (AMR-WB) speech codec and variable-rate multimode wideband (VMR-WB) speech codec are two coding standards based on CELP model for processing wideband input speech. When communication occurs between them, transcoding must be performed to translate the encoding format from one standard to another one. In this paper, an effective transcoding scheme is presented which makes...
This paper proposes a novel scheme for speech secure communication based on information hiding and Compressed Sensing (CS). The scheme first uses CS technology to compress the secret speech and reduce the information bit rate to be embedded, which is significantly different from state-of-art secret speech processing methods. Secret bit stream is then embedded into cover speech based on SCS (Scalar...
Todaypsilas P2P media streaming application periodically suffers from routing hotspots, a.k.a., flash crowds. A routing hotspot is typically created by an unanticipated new event that triggers an unanticipated surge of users that request streaming service from some particular peers, temporarily overwhelming the peerpsilas delivery capabilities. In this paper, we consider how to discover the routing...
Digital steganography introduces statistical distortion to some extent. Thus, steganalysis can be used to classify an object with or without hidden information. In this paper, we present a novel approach to detect the presence of LSB (least significant bit) steganographic messages in the voice secure communication system. A distance measure, which has been proved to be sensitive to LSB steganography...
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