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This paper presents a study on how the performance of Phonetic engine(PE) varies with different set of spectral features selected for it. An exclusive study is carried out with a PE developed in the Manipuri language. Here, we built the PE using phonetic transcriptions and modeling of each phonetic unit by Hidden Markov Model (HMM). The symbols of International Phonetic Alphabet (IPA) (revised in...
Several methods have been explained for blind source separation (BSS) in the literature. Those methods fail when considered for separation of speech signals. This paper mainly focuses on blind speech signal separation from the observations using canonical correlation. The performance of the proposed method is evaluated in terms of signal to interference ratio (SIR) and time domain waveforms of separated...
Wireless sensor networks are very suitable for remote sensing and monitoring tasks. Sensor nodes being battery operated devices and other limited resources present many challenges for protocols in WSNs. Researches are being continuously conducted with the purpose of combating these issues. Clustering in WSNs aim to distribute the energy load of the nodes by assigning some aggregator nodes or cluster...
With the rapid emergence of cloud and its magnificent features such as high availability, reliability and security, a large number of clients are moving to the cloud platform. This migration of clients has led to increased burden on the resources such as CPU, network and memory. Hence, the problem of high power consumption, increased carbon footprints and need for higher cooling effects arose. However,...
The conventional private and public key cryptosystems suffer from issues of key exchange and key distribution respectively. A better alternative is to use identity of a user as the public key. Identity-based encryption is well accepted worldwide but its key revocation issue makes it insecure. Attribute Based Encryption, using attributes of a user instead of identity combats these issues. Though many...
A compact wideband quarter-wave transformer using microstrip lines is presented. The design relies on replacing a uniform microstrip line with a multi-stage equivalent circuit. The equivalent circuit is a cascade of either T or π networks. Design equations for both types of equivalent circuits have been derived. A quarter-wave transformer operating at 1 GHz is implemented. Simulation results indicate...
Circularly polarized microstrip antenna realized by cutting unequal arm length U-slot is discussed. In 2.3 GHz frequency band, it gives VSWR and axial ratio bandwidth of 9 and 4%, respectively. In the reported work, a detailed explanation about the working of circular polarized antenna in terms patch resonant modes and the equations/design procedure to realize similar antennas at different frequency...
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