Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Engineering Expert

1. Aim

This assignment is designed to give students insight into various aspects of Real-time embedded systems. Students are required to use the DSP/BIOS operating system and TMS320C6713 DSK board to solve, implement and test real-time programming problems.

2. Learning Objectives

This assignment will enable you to:

1) Understand a real-time system and its software design challenges.
2) Analyse the requirements and needs of a real-time system.
3) Design and optimise software to meet the real-time requirements.
4) Integrate the DSP/BIOS operating system and application programs into a design.

3. Specification

You are required to design and implement a DSP/BIOS application which runs on the C6713 DSK. The application should perform audio signal processing to meet the following specification.

3.1 I/O specification

The architecture your application must adhere to is shown in figure given below.

1520_Audio processing architecture.jpg

3.1.1. HWI design notes

The application should read and prepare 16 bit stereo audio samples to and from the AIC23 codec at a sampling frequency of 44.1 kHz. You must use HWI objects with the interrupts posted by the serial port in order to execute this task. Two separate interrupts (and ISRs) are needed to handle reading and writing of samples to the port. This is not the most efficient way to handle the I/O, nonetheless it is exactly how you are instructed to implement this.

3.1.2. Frame buffer management design notes

You must make use of DSP/BIOS communication & synchronisation modules. One of the most obvious choices would be use of SEM and QUE modules to implement a pointer exchange, the MBX and PIP modules can also give the required functionality. You must describe your solution in your report.

3.2 SWI audio processing specification

A SWI must be posted as each full frame of data is passed to the input buffer to instigate the processing. You must ensure that the SWI runs once for every time it is posted, otherwise the latency of audio output will increase over time.

3.2.1. Fourier transform

For the first processing stage you must prepare a function to find out the frequency spectrum of the current frame.

3.2.2. Beat Detector

In this stage of the assignment you are asked to prepare a function to pulsate the DSK LEDs in synchronisation to the rhythm of a music input signal. The principle assumes that percussive instruments will have highest energy content in a music signal.

3.2.3. Filtering and inverse FFT

For this task you must prepare a function to filter the data, the definition of this term with respect to signal processing is to selectively modify the shape of a signal's frequency spectrum. The operation can be performed efficiently in the frequency domain by attenuating to zero coefficients outside the band you wish to keep.

3.2.4. Output multiplexer

The final function allows user to select either the unprocessed or processed audio data for output. This function should check the status of one of the user DIP switches, according to switch value either the original input data or resultant from the IFFT function is copied into a frame used to pass output data to the transmit ISR.

4. Requirements

Your task is as follows:

1. Implement the audio processing application in a DSP/BIOS project.

2. Experimentally measure the execution times for your HWI and SWI objects. In your report describe how the measurements were taken, give results and comment on the instantaneous and average CPU load.

3. You must also document the following aspects in your report:

a) Briefly describe configuration settings required outside of your code for your scheduling objects.

b) Outline your solution to management of the input/output frame buffers; give pseudocode where appropriate, concentrate on aspects of scheduling and synchronisation.

c) Describe work required to utilise the TI DSPLIB functions for the FFT & IFFT, particularly on the interfacing of your code/data structures with theirs’.

d) Give pseudocode for your implementation of the beat detection scheme, include description of your implementation of circular buffering.

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M9729

Have any Question? 


Related Questions in Computer Engineering

Write a program that draws a circle with radius 100 and

Write a program that draws a circle with radius 100 and center (200, 200). Ask the user to specify the x- and y-coordinates of a point. Draw the point as a small circle. If the point lies inside the circle, color the sma ...

Assignment 1information security within organizations has

Assignment 1 Information security within organizations has evolved and has become much more complex.  In a written paper, answer the following questions:  How has computer security evolved into modern information securit ...

1 search your librarys database and the web for an article

1. Search your library's database and the Web for an article related to individuals violating their organization's policy and being terminated. Did you find many? Why or why not? 2. Go to the (ISC)2 Web site at www.isc2. ...

Design an algorithm that accepts as input a given

Design an algorithm that accepts as input a given permutation of the ten digits and returns as output the next permutation in the set in lexical order. As an example, if we have: Current permutation is: 7 9 0 1 6 3 8 5 4 ...

Identify the different types of problem insurance claims

Identify the different types of problem insurance claims. Tell why you think a particular claim can be a "headache".Discuss follow-up techniques for tracking unpaid insurance claims

1 when an http server receives a request message from an

1. When an HTTP server receives a request message from an HTTP client, how does the server know when all headers have arrived and the body of the message is to follow? 2. In a nonpersistent HTTP connection, how can HTTP ...

Design and implement a word-searching algorithm that on

Design and implement a word-searching algorithm that on finding a mismatch with the current word simply reads characters to the start of the next word before attempting a match again.

Filtering using phase one of the limitations of the

Filtering using phase) One of the limitations of the noise-smoothing linear filters is that their frequency response has zero phase. This means the phase distortions due to noise remain unaffected by these algorithms. To ...

It was suggested there that the data may be subject to

It was suggested there that the data may be subject to recall or measurement errors. Assuming that these recall errors are potentially concentrated among high counts, reestimate the Poisson and NB2 models after sequentia ...

The algorithm we have developed may not reproduce the

The algorithm we have developed may not reproduce the original text if the output was used as input. This would happen because if there was a space at the end of an input line it would be turned into two spaces in the re ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro