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Data Type Conversion to 16-bit Integer

Setting the relational operator type

Double click on the “Relational Operator” block. Change the “Relational operator” to “==”. Click on the “Signal Data Types” tab.

Changing the Relational Operator

Setting the relational operator data type

Set the “Output data type mode” to “Boolean”.

Changing the Output Data Type

Joining the blocks

Move the blocks and join them as shown in the Figure below.

Joining the Blocks

Checking the dyadic analysis filter bank

Double click on the “Dyadic Analysis Filter Bank” block. The values of the Dyadic Analysis Filter Bank are shown below. You do not need to change them yet. Click on “OK”.

Checking the Dyadic Analysis Filter Bank

Checking the delay alignment

The delay alignment is shown below, with different delay times for the different frequencies.

Checking the Delay Alignment

Checking the soft threshold

The “Soft Threshold” sets the threshold below which noise is ignored for each of the four channels. Zero means no noise reduction.

Checking the Thresholds

Checking the dyadic synthesis

Double-click on the “Dyadic Synthesis Filter Bank”. There is no need to change the values at this time. Click on “OK” when done.

Checking the Dyadic Synthesis Filter Bank

Returning to the parent system

From the Toolbar, select the “Up Arrow” icon. This returns you to the next higher level.

Returning to the Parent System

Building the model

Selecting real-time workshop

Select Tools ->Real-Time Workshop ->Build Model.

Building the Model

The completed model running on code composer studio

From the folders on the left, select the source code for the project.

The Completed Model Running under Code Composer Studio

Different settings on the c6713 dsk

Microphone straight through to loudspeakers

To check out the microphone and loudspeakers, set the DIP switches on the C6713 DSK as follows:

Switch Position 0

The microphone is fed directly to the loudspeakers. There is no noise reduction.

Switch position for wavelet noise reduction

To run the “Wavelet Noise Reduction” subsystem, set the DIP switch to 1.

Switch Position 1 for Wavelet Noise Reduction

Modifying the model

The next stage is to modify the model. We will change the wavelet type to “Symlets”.

Changing the filter type

Double-click on the “Dyadic Analysis Filter Bank” block. Change the “Filter” field to “Symlets”. Click on “OK”.

Dyadic Analysis Filter Bank set to Symlets

Updating the dyadic synthesis filter bank

The wavelet type should be the same as that used in the Dyadic Analysis Filter Bank. Double-click on the “Dyadic Synthesis Filter Bank” block. Change the “Filter” field to “Symlets”. Click on “OK”.

Configuring the Dyadic Synthesis Filter Bank

Building the model

Select Tools ->Real-Time Workshop ->Build Model.

Building the Model

Running the updated model

Run the updated model and listen to the effect of using different filter types.

Some things to try

You may wish to experiment with different settings. Here are some suggestions.

Change the wavelet types

Inside the “Dyadic Analysis Filter Bank” are different wavelet types. Which are suitable for wavelet denoising and which are not? Note: you will also have to alter the values used in the “Dyadic Synthesis Filter Bank”.

Available Wavelet Types

Change the delay alignment times

Experiment with the delay alignment times. Try higher and lower values.

What is the effect of completely removing the “Delay Alignment” block?

Change the noise reduction thresholds

In the “Soft Threshold” block, change the values. The existing vector of [3, 2, 1, 0] reduces high frequency noise, but does not affect low frequencies.

Create your own subsystem

Add your own subsystem block controlled by the DIP switches and add your own wavelet denoising algorithm. Choose your own wavelet, number of channels, sampling frequency and thresholds.

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
yes that's correct
I think
Nasa has use it in the 60's, copper as water purification in the moon travel.
nanocopper obvius
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
how nano science is used for hydrophobicity
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
what is differents between GO and RGO?
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
analytical skills graphene is prepared to kill any type viruses .
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
The nanotechnology is as new science, to scale nanometric
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
what school?
biomolecules are e building blocks of every organics and inorganic materials.
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