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For each frame the counter correspondent to the loudest channel is incremented. When a channel counter equals a threshold The requirement for a threshold amount of wining rounds was set in order to prevent random noise or occasional “spikes” from interfering with the algorithms function. This threshold is configurable. In this example it was set to 10. , the correspondent channel is selected.

For Each 64 samples frame the following algorithm is implemented:

    Output channel selection procedure

  1. Find Maximum Input Level
  2. Increment Counter correspondent to the “loudest” channel
  3. If the Counter value =10 THEN:
  4. Broadcast correspondent input channel to all outputs
  5. Reset Counter

This section will describe the process of generating a real-time application using Simulink blocks for the algorithm itself and the driver introduced in the previous chapter. The Simulink model is shown in Figure 21 The algorithm is implemented for 4 channels, however we will use only three of them. .

Simulink Model

The block diagram shown in Figure 20 is translated to the model shown in the following figures.

  • The conference algorithm routes a selected channel to the 4 outputs:
Signal Routing
  • The input level is measured for 4 channels:
Algorithm Model
  • The 4 level values compose a 4 element vector. This vector is fed to the “Max abs value” block:
Finding the Maximum Level
  • The index of the Maximum level enters the index selection block. The correspondent channel is incremented and compared to the threshold.
Index Selection
  • If the counter value equals the threshold, the index is selected as input to the conference block

The real-time model can be found in the file C67_Simulink_conference.rar.

References

  1. "TLV320AIC20K/24KEVM User's Guide ", TI Document SLAU088A, April 2005 ( (External Link) )
  2. "DSP−CODEC Development Platform User's Guide", TI Document SLAU090, September 2002 ( (External Link) )
  3. "Low Power Highly-Integrated Programmable 16-Bit 26-KSPS Dual Channel CODEC (Rev. D)" TI Document SLAS363D, March 2002 –Revised April 2005 ( (External Link) )

MATLAB and Simulink are registered trademarks of The MathWorks, Inc. See www.mathworks.com/trademarks for a list of additional trademarks. Other product or brand names may be trademarks or registered trademarks of their respective holders.

Appendix a – configuration

Tlv320aic24k&Codec development platform

Analog ports

The following table is based on the one the Codec’s EVM Datasheet.

It matches the board connectors with the inputs and outputs.

(Notice, this table includes corrections and elaborations in compare to the one in the Datasheet).

  • We are using the TLV320AIC24KEVM is 24K.

The Inputs and Outputs of a certain channel are set by its 6a and 6b registers.

Those registers can be set, like before, between the initialization of the Handle and its activation.

If, for example, the input samples of channel 0 in the CODEC should be received from INP3 According to the table the connection is to J10, since we are working with 24K EVM and channel 0 is located at the master side.) . The configuration should be as follows:

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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
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