Speech scrambling based on multiwavelet and Arnold transformations

Speech Scrambling Based on Wavelet Transform

The increased interest in analog speech scrambling techniques are due to the increased visibility and publicity given to the vulnerability of communication systems to eavesdropping of unauthorized remote access (Gersho & Steele, 1984). In wireless communications, including High Frequency (H.F) and satellite communications, it is almost impossible to prevent unauthorized people from eavesdroppin...

3 Speech Scrambling Based on Wavelet Transform

A Color Image Encryption Scheme Based on Arnold Scrambling and Quantum Chaotic

In recent years, several algorithms of image encryption have been proposed independently. In this paper, an algorithm of image encryption based on general twodimensional Arnold transform with keys and quantum chaotic map is proposed. First, the key streams are generated by the two-dimensional logistic map as initial conditions and parameters. Second, general Arnold scrambling algorithm with key...

An Efficient speech scrambling technique based on chaotic mapping and pseudorandom binary scrambling

To enhance the information security in network communications, this paper suggests a new speech scrambling algorithm based on random permutation, chaotic mapping and pseudo random binary scrambling.Firstly random permutation algorithm is used to shuffle the rows of the original speech followed by shuffling the rows using chaotic Bernoulli mapping. This produces an intermediary scrambled speech....

the effects of speech rate,prosodic features, and blurred speech on iranian efl learners listening comprehension

کلید واژه ها به زبان انگلیسی: effect of speech rate on listening comprehension, blurred speech,segmental and suprasegmental features,authentic speech,intelligibility, discrimination, omission, assimilation چکیده: سرعت مطالب شنیداری در کلام پیوسته بطور کلی همواره کابوسی بوده برای یادگیرنده های زبان دوم و بالاخص برای شنوندگان ایرانی. علی رغم عقل سلیم که کلام با سرعت کندتری فعالیتهای درک مطلب شن...