JDSP

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	Please follow these steps in order to become acquainted with J-DSP


Step
3		Review of J-DSP demos
		This part provides the first actual experience with J-DSP. By starting any of the demos below, the J-DSP editor loads automatically with a predefined simulation. You need to press the [I Accept] button when asked. Then simply experiment with the demos. The next step will instruct you how to create your own simulations in J-DSP.

		Step 3a Demo 1: Pole-Zero demo
		This demo shows the animations of the frequency response by placing/moving the poles and zeros in the z-plane. It also demonstrates that zeros create spectral valleys and poles create spectral peaks. The impulse response of the filter can be viewed in the plot window. By moving the poles/zeros in the z-plane one can obtain a desired frequency response and its corresponding filter coefficients.

		Step 3b Demo 2: LPC vocoder demo
		Linear prediction is a widely used method that characterizes the shape of the speech spectrum with a small number of parameters that can be coded efficiently. Linear predictive coding (LPC) predicts a time-domain speech sample based on a linearly weighted combination of previous samples. It represents the frequency shaping attributes of the vocal tract in the source-system filter model. This demo gives a brief overview of linear prediction coders (LPC). It also demonstrates the analysis-synthesis method of speech coding. The resonant frequencies of the vocal tract (also called formants) can be viewed in the frequency response plot.