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In this recent multimedia world, the significant challenges are the optimized use of storage space and Bandwidth. In order to reduce the storage space of images and transmission of information with limited Bandwidth availability, Image compression plays a imperative role by diminishing the size of image and to utilize the Bandwidth in economical and valuable manner without degrading the quality of...
Image pre-processing techniques are used to improve the quality of an image before processing into an application. This uses a small neighborhood of a pixel in an input image to get a new brightness value in the output image. These preprocessing techniques are also called as filtration and resolution enhancement. The medical image quality parameters are mainly noise and resolution. The main objective...
Multiband OFDM is the optimum candidate for high rate wireless applications over short distances. The aim of this contribution is to investigate the performance of convolutional code and Reed Solomon code combination for multiband OFDM cognitive radio system. Analysis showed that better performance could be achieved with RS-CC combination than single codes. Furthermore the fast Fourier transform and...
Electrocardiogram (ECG) is one of the most important noninvasive tools for the diagnosis of cardiac arrhythmia. Automatic beat classification in ECG is a topic of continuing research. In this paper, automatic classification of 3 beat types — normal sinus rhythm, premature ventricular contraction and left bundle branch block is implemented. QRS detection is done using the Pan Tompkins algorithm. Wavelet...
As the technology develops, people looks forward more on Speech analysis for Speaker Recognition. A large multichannel corpus, including mobile phone, mobile phone headset, laptop microphone and laptop headset, is collected to evaluate the system performance. Also, a comparative study among wavelet packets and DWT on a gender based Speaker recognition database is evaluated in this paper. This work...
In the present work, we propose a new weighted fusion scheme using Daubechies complex wavelet transform (DCxWT). Shift sensitivity and lack of phase information in real valued wavelet transforms motivated to use DCxWT for multimodal medical image fusion. It was experimentally found that shift invariance and phase information properties improve the performance of image fusion in complex wavelet domain...
Video copy detection is an active research area as copyright issues continue to be a challenge to the multimedia industry. A content-based video copy detection method using discrete wavelet transform is presented here. Daubechies wavelet transform is used to obtain feature descriptor from video frames. The computation required for similarity search is also reduced in this work. MUSCLE-VCD-2007, the...
In this study, we are presenting WWT (Walsh Wavelet Transform) technique to compress an image. In recent times, DWT (Discrete Wavelet Transform) & WT (Walsh Transform) are developed as a prevalent methods for compressing an image. In this, WT (Wavelet Transform) is one such significant transform of image compression. Outcome of this is altered with the wavelet type changes. In this paper, we used...
This paper presents a new method for vehicle license plate localization. The proposed method uses wavelet decomposition for localizing the license plate. We first preprocess the image by masking the non-license plate border with the prior knowledge of the distance of the vehicle. We then use the unique property of sudden and a frequent transition which takes place across characters of the license...
It is always desired to have high transmission rates over severe time-dispersive multi-path channels without usage of a complex receiver implementation. In this case the Multicarrier Code Division Multiple Access (MC-CDMA) is used which is a combination of conventional Code Division Multiple Access (CDMA) and Orthogonal Frequency Division Multiplexing (OFDM). Better BER performances are achieved by...
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