Global Sources
EE Times-Asia
Stay in touch with EE Times Asia
?
EE Times-Asia > Embedded
?
?
Embedded??

Introduction to audio processing using the WOLA Filterbank coprocessor

Posted: 26 Feb 2009 ?? ?Print Version ?Bookmark and Share

Keywords:coprocessor? audio processor? DSP? application note?

The Toccata Plus, BelaSigna 200 and Orela 4500 audio systems consist of a 16bit programmable DSP and two audio coprocessors: the I/O processor (IOP) and the WOLA filterbank coprocessor. Both the IOP and the WOLA filterbank coprocessor are integrated into the Toccata Plus, BelaSigna 200 and Orela 4500 series products, as dedicated coprocessors, running in parallel with the main DSP core (RCore). Both the IOP and the WOLA filterbank coprocessor are highly configurable. They are major components of the audio signal processing chain.

Specifically, the IOP automatically and without user intervention, manages the transfer of digital audio data from the input stage (ADC) to the input FIFO and from the output FIFO to the output stage (DAC). The WOLA coprocessor implements a weighted overlap-add filterbank that performs time domain-to-frequency domain and frequency domain-to-time domain transforms efficiently. Numeric

precision is maintained by using block floating-point arithmetic in the WOLA filterbank coprocessor.

This document provides an overview of the features and typical usage of the IOP and the WOLA filterbank coprocessor. It also describes the basic considerations when selecting WOLA filterbank parameters and compromises for specific applications.

View the PDF document for more information.





Article Comments - Introduction to audio processing usi...
Comments:??
*? You can enter [0] more charecters.
*Verify code:
?
?
Webinars

Seminars

Visit Asia Webinars to learn about the latest in technology and get practical design tips.

?
?
Back to Top