<< Chapter < Page
  From matlab and simulink to real     Page 3 / 3
Chapter >> Page >
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

How we are making nano material?
what is a peer
What is meant by 'nano scale'?
What is STMs full form?
scanning tunneling microscope
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.
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
sciencedirect big data base
Introduction about quantum dots in nanotechnology
Praveena Reply
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
characteristics of micro business
for teaching engĺish at school how nano technology help us
How can I make nanorobot?
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
how can I make nanorobot?
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
what is the actual application of fullerenes nowadays?
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
is Bucky paper clear?
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!

Source:  OpenStax, From matlab and simulink to real-time with ti dsp's. OpenStax CNX. Jun 08, 2009 Download for free at http://cnx.org/content/col10713/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'From matlab and simulink to real-time with ti dsp's' conversation and receive update notifications?