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Electrocardiogram (ECG) is one testing method for measuring electrical activity of heart. ECG is the graphical representation of the electrical signal generated from heart. Heart is an organ of human which pump blood for the entire body. It require huge amount of data to store and transmit these ECG signals. So it is necessary for compression of the ECG signals. In few last years, many algorithms...
Nowadays, digital image forgery detection is one of the most challenging tasks. In this paper, a new block-based method is proposed to detect tampered region in copy-move forgery case. In the method, feature vectors are extracted using DCT transform from non-overlapping blocks of the image. Then, these vectors are lexicographically sorted. Copied blocks are selected from identical vectors based on...
This paper proposed an adaptive hybrid speech enhancement algorithm to reduce the non-stationary noise of a noise contaminated speech. This approach combines the Discrete Cosine Transform (DCT) with an Adaptive Empirical Mode Decomposition (AEMD). The proposed DCT is an extension to the general DCT and the AEMD was developed by adding an extra noise cancellation block for enhancement. The complete...
Watermarking is a technology that complements cryptography by embedding imperceptible signals in work. Information hiding techniques have recently become important in a number of application areas. Digital audio, video and images are increasingly furnished with distinguishing but imperceptible marks, which may contain a hidden copyright notice that helps to prevent unauthorized copying directly. One...
The advancement in 4G technology mainly depends upon the Orthogonal Frequency Division Multiplexing (OFDM) scheme. OFDM scheme has much betterment like efficient spectrum usage, mitigation of selective fading effects, reduces ICI and ISI, etc. The major disadvantage of this scheme is a high peak to average power ratio (PAPR) which requires a costlier high power amplifier for processing. Partial Transmit...
In this paper we focuses extensively on review of achievement of various non-blind invisible watermarking techniques. The main intention of the proposed techniques is to embed color logo into color host images or videos using transform domain techniques. And this concept is extended to video watermarking with multiple logos such as gray and color logos, to evince the supreme capacity of watermarking...
Normally images obtained from satellites are of low-contrast type which hides major information carried by the image. Hence, image restoration is necessary in the image processing domain to extract all the information present in the images. The low contrast satellite image restoration based on adaptive histogram equalization combined with Discrete Cosine Transform (DCT) and Discrete Wavelet Transform...
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