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The Audio Conference Bridge enables a voice call with multiple (n>2) attendants. The algorithm monitors the voice signals from all attendants, and creates the signals to be transmitted to the attendants. In this module the implementation of such a bridge is described, The implementation is based on the integration of user-specific driver with the Simulink environement building blocks.


The Audio Conference Bridge enables a voice call with multiple (n>2) attendants, as described in Figure 1. The algorithm monitors the voice signals from all attendants, and creates the signals to be transmitted to the attendants.

This application cannot be implemented using solely the DSK6713, as it has only 2 analog ports. Therefore two daughterboards, the TLV320AIC20/20KEVM and the DSP/CODEC development platform, are used. In this example we will integrate an algorithm based on Simulink blocks, with a legacy driver.

This module demonstrates the use of the device driver building blocks together with legacy code integration to implement a custom device driver on the DSK6713. This feature allows the use of the Simulink® environment with user-specific drivers.

A wide range of algorithms exist, in the current chapter a simple algorithm based on finding the maximum level among 3 attendants is implemented

The Audio Conference Bridge

The platform

The DSK6713 supports stereo analog inputs and outputs. The Audio Conference Bridge application demands more analog ports. In this example we will use TLV320AIC24EVM An additional board the DSP-CODEC Platform () is also needed. This board mainly interfaces between the TLV320AIC24EVM connector and the peripherals connector in the DSK6713. (). This board contains two TLV320AIC24 () stereo CODECs, thus supporting 4 audio channels. The system is shown in Figure 2.

The TLV320AIC24 implements the smart time division multiplexed serial port (SMARTDM™). The SMARTDM port is a synchronous 4-wire serial port in TDM format for glue-free interface to TI DSPs. The TLV320AIC24 can be gluelessly cascaded to any SMARTDM-based device to form a multichannel CODEC, and up to eight TLV320AIC2x CODECs can be cascaded We will use a single EVM board in this example. .

The SMARTDM port is connected to the Multichannel Buffered Serial Port (McBSP) in the DSP as shown in Figure 3.

The TLV320AIC24 supports various types of analog interfaces, and can operate with sampling rates to 104 KSPS, with 16 bit samples. The block diagram is shown in Figure 4. The TLV320AIC24 features are summarized in Figure 5.

The Platform
TLV320AIC24 Interface
TLV320AIC24 Block Diagram
TLV320AIC24 Features Summary

The tlv320aic24 driver

Principle of operation

The driver operates in a double-buffering scheme as shown in Figure 6. There are two buffers in each direction (Receive/Transmit). For each frame to processes occur simultaneously:

Questions & Answers

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
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
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
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Do you know which machine is used to that process?
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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