A Bandwidth Extension Technique for Signal Transmission Using Chaotic Data Hiding

Bandwidth extension can be defined as a deliberate process of expanding the frequency range (bandwidth) for signal transmission. Its significant advancement in recent years has led to the technology being adopted commercially in several areas, including psychoacoustic bass enhancement of small loudspeakers and the high frequency enhancement of perceptually coded audio. In this paper, a novel bandwidth extension method based on chaotic data hiding is proposed. More specifically, a hidden channel is created by removing the imperceptible components from the transmitted audio or video. The out-of-band information is then encoded and embedded into the hidden channel without degrading the quality of the bandlimited signal. At the receiver, when the out-of-band information is extracted from the hidden channel, it can be used to combine with the bandlimited signal, providing a signal with a wider bandwidth. To balance the tradeoff between robustness and payload of transmitting the out-of-band information through the hidden channel, the technique of chaotic code division multiple access (CDMA) is employed. Since minimizing the multiple access interference (MAI) is crucial to the detection performance of a CDMA system, we employ a hybrid algorithm based on genetic programming (GP) and DNA computing to generate the desired spreading sequences with low cross-correlation. The effectiveness of the proposed method is validated by applying it to enhance telephony speech quality.

[1]  Riccardo Rovatti,et al.  Chaotic complex spreading sequences for asynchronous DS-CDMA. I. System modeling and results , 1997 .

[2]  Henry Leung,et al.  Design of piecewise maps for chaotic spread-spectrum communications using genetic programming , 2002 .

[3]  Takayuki Nagai,et al.  Speech signal band width extension and noise removal using subband HMN , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[4]  Ezio Biglieri,et al.  Design of spread-spectrum sequences using chaotic dynamical systems and ergodic theory , 2001 .

[5]  Gerhard Schmidt,et al.  Bandwidth Extension of Speech Signals , 2008, Lecture Notes in Electrical Engineering.

[6]  Min Wu,et al.  Multimedia Data Hiding , 2003, Springer New York.

[7]  Henry Leung,et al.  Design of 1-D piece-wise maps for multi-user CDMA communications using a novel GP-DNA algorithm , 2002 .

[8]  Nikos E. Mastorakis,et al.  Recent advances in computers, computing and communications , 2002 .

[9]  Peter Jax,et al.  An upper bound on the quality of artificial bandwidth extension of narrowband speech signals , 2002, 2002 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[10]  Robert M. Gray,et al.  An Algorithm for Vector Quantizer Design , 1980, IEEE Trans. Commun..

[11]  Andrew B. Watson,et al.  DCT quantization matrices visually optimized for individual images , 1993, Electronic Imaging.

[12]  Douglas D. O'Shaughnessy,et al.  Statistical recovery of wideband speech from narrowband speech , 1992, IEEE Trans. Speech Audio Process..

[13]  P. M. Grant,et al.  Digital communications. 3rd ed , 2009 .

[14]  Walter Bender,et al.  Techniques for Data Hiding , 1996, IBM Syst. J..

[15]  John G. Proakis,et al.  Digital Communications , 1983 .

[16]  Ahmed H. Tewfik,et al.  Data hiding for video-in-video , 1997, Proceedings of International Conference on Image Processing.

[17]  John E. Markel,et al.  Linear Prediction of Speech , 1976, Communication and Cybernetics.

[18]  William Feller,et al.  An Introduction to Probability Theory and Its Applications , 1967 .

[19]  W. Bastiaan Kleijn,et al.  Avoiding over-estimation in bandwidth extension of telephony speech , 2001, 2001 IEEE International Conference on Acoustics, Speech, and Signal Processing. Proceedings (Cat. No.01CH37221).

[20]  A. Spanias,et al.  Perceptual coding of digital audio , 2000, Proceedings of the IEEE.

[21]  Lajos Hanzo,et al.  Voice Compression and Communications , 2001 .

[22]  Bernhard E. Keiser,et al.  Digital telephony and network integration , 1985 .

[23]  Peter Jax,et al.  On artificial bandwidth extension of telephone speech , 2003, Signal Process..

[24]  William Feller,et al.  An Introduction to Probability Theory and Its Applications , 1951 .