The Visible Spectrum

Tigra Hints is free javascript widget that displays pop-up box with notes (also known as tooltips or hints) when mouse appears over any HTML element on the page. Any HTML is welcome inside the box: lists, tables, images etc. This component makes the site more informative and easy to use while...

An LPC vocoder (Linear-Predictive Coder), is a lossy compression technique that is highly optimized for low-bitrate speech transmission.The problem here that we solve is to take a speech waveform with an 8kHz sampling rate, code it to a much lower bit-rate so that it can be transmitted over a...

This is an old program (1.999) that I have written for understanding radiation patterns of antennas. Basically I was looking for the relationship between interference diagram (Fourier transform of ilumination, usually called Array Factor) and 3D radiation pattern of the Array. For that reason, it...


Platforms: Matlab

This program generates filtered BPSK with proper pulse shaping filters such as ideal Nyquist, Raised cosine, Square root raised cosine and Gaussian filters. Determine the power spectrum of filtered BPSK signals.


Platforms: Matlab

EDFT (Extended Discrete Fourier Transform) algorithm produces N-point DFT of sequence X where N is greater than the length of input data. Unlike the Fast Fourier Transform (FFT), where unknown readings outside of X are zero-padded, the EDFT algorithm for calculation of the DFT using only...


Platforms: Matlab

This software has been realized at the CNS Technology Lab at Boston University - http://techlab.bu.edu. The main author of this software is Chaitanya Sai ( http://techlab.bu.edu/members/sai/ ).CONFIGR (CONtour FIgure GRound) is a computational model based on principles of biological vision that...


Platforms: Matlab

These algorithms are an implementation of the iterative amplitude adapted Fourier Transform method of Schreiber and Schmitz to make surrogate time series. These surrogate time series or fields were made to have the Power spectrum and the amplitude distribution (or PDF) from a measurement, but...


Platforms: Matlab

Low-pass filters allow the low frequency components of an input signal to pass through while attenuating (reducing) high frequency components. Measurement noise fall into the high frequency range of the signal spectrum, while the underlying process signal usually lies towards the low frequency...


Platforms: Matlab

In the context of seismic analysis of structures, various earthquake inputs may be required depending upon the nature of analysis being carried out. The response spectrum of an earthquake is the most favored seismic input for earthquake engineers. A displacement response spectrum is the plot of...


Platforms: Matlab

Features:1) All colors have nearly the same luminescence (ideal for lifetime images that will be displayed with an additional transparency map to "mask" places where the lifetime is not well defined)2) Color vision deficient persons can only see reduced color: as much as 10% of adult male persons...


Platforms: Matlab

There are many ways to convert high dynamic range (HDR) images to low dynamic range (LDR) versions suitable for display. This tone renderer simulates the properties of a generic transparency (positive) film, such as Kodak's Ektachrome or Fuji's Velvia.Unlike tone mapping operators (such as...


Platforms: Matlab

The three-dimensional viewing of MRI images can help understand the position of (double) oblique slices as often used in cardiac MRI.The function returns a figure handle which can be used as input argument to display a second slice in the same figure. the other output is a handle for the slice...


Platforms: Matlab

This soccer season, denoising the noise from the vuvuzela has become very popular, as many fans find the noise from this instrument distracting from the game. In this example, we analyze the vuvuzela spectrum and identify its fundamental and first few harmonic frequencies. We then use parametric...


Platforms: Matlab

Acquires buffers of data from the system default sound card, calculates the power spectrum of the data and plots this along with the raw sampled data to screen.Useful as a quick and dirty (and completely uncalibrated) audio frequency spectrum analyser.See http://iheartmatlab.blogspot.com for...


Platforms: Matlab

This Wordpress Widget allows you to display the recent posts of your blogroll links via RSS Feeds as a sidebar widget. The Plugin works without javascript and without AJAX. It uses the Wordpress standard links database and honors the visible and target settings as defined for each link (private...


Platforms: PHP

This WordPress Widget allows you to display the recent posts of your blogroll links via RSS Feeds as a sidebar widget or via shortcode [blogroll] in any post or article on every position you want to. The Plugin works without javascript and without AJAX. It uses the WordPress standard links...


Platforms: PHP

ct_gearth is a new content type based on the Google Earth API. Users can attach .kml files to a node (with upload module), which in turn is displayed through the Google Earth API. If a user attaches several .kml files it is possible to choose between them via a drop-down box.This module is part...


Platforms: PHP

Analog heaven Ultra Analog is about capturing the unique warmth and feel of analog circuitry. At the heart of Ultra Analog are the best alias free oscillators of the industry, featuring standard wave shapes, hard sync, sub oscillators and integrated pitch envelopes. Ultra Analog also features...


Platforms: Mac

MR Noise is a broadband noise reduction processor. It distinguishes itself by being both great sounding and incredibly easy to use. Like most noise reduction systems, MR noise works in the frequency domain, and requires that the noise spectrum be learned before noise reduction can commence. If...


Platforms: Mac

LibXtract is a simple, portable, lightweight library of audio feature extraction functions. The purpose of the library is to provide a relatively exhaustive set of feature extraction primatives that are designed to be 'cascaded' to create a extraction hierarchies. For example, 'variance',...


Platforms: Mac