Low-Power Audio Input Enhancement for Portable Devices
With the development of VLSI and wireless communication technology, portable devices such as personal digital assistants (PDAs), pocket PCs, and mobile phones have gained a lot of popularity. Many such devices incorporate a speech recognition engine, enabling users to interact with the devices using...
Main Author: | |
---|---|
Format: | Others |
Language: | en_US |
Published: |
Georgia Institute of Technology
2005
|
Subjects: | |
Online Access: | http://hdl.handle.net/1853/6821 |
id |
ndltd-GATECH-oai-smartech.gatech.edu-1853-6821 |
---|---|
record_format |
oai_dc |
spelling |
ndltd-GATECH-oai-smartech.gatech.edu-1853-68212013-01-07T20:11:54ZLow-Power Audio Input Enhancement for Portable DevicesYoo, HeejongLMS adaptive filterLow-power processingCADSPFloating gate transistorsSpeech processing systemsAnalog electronic systemsMobile computingPortable computers ProgrammingSignal processing Digital techniquesWith the development of VLSI and wireless communication technology, portable devices such as personal digital assistants (PDAs), pocket PCs, and mobile phones have gained a lot of popularity. Many such devices incorporate a speech recognition engine, enabling users to interact with the devices using voice-driven commands and text-to-speech synthesis. The power consumption of DSP microprocessors has been consistently decreasing by half about every 18 months, following Gene's law. The capacity of signal processing, however, is still significantly constrained by the limited power budget of these portable devices. In addition, analog-to-digital (A/D) converters can also limit the signal processing of portable devices. Many systems require very high-resolution and high-performance A/D converters, which often consume a large fraction of the limited power budget of portable devices. The proposed research develops a low-power audio signal enhancement system that combines programmable analog signal processing and traditional digital signal processing. By utilizing analog signal processing based on floating-gate transistor technology, the power consumption of the overall system as well as the complexity of the A/D converters can be reduced significantly. The system can be used as a front end of portable devices in which enhancement of audio signal quality plays a critical role in automatic speech recognition systems on portable devices. The proposed system performs background audio noise suppression in a continuous-time domain using analog computing elements and acoustic echo cancellation in a discrete-time domain using an FPGA.Georgia Institute of Technology2005-07-28T17:49:19Z2005-07-28T17:49:19Z2005-01-13Dissertation2365210 bytesapplication/pdfhttp://hdl.handle.net/1853/6821en_US |
collection |
NDLTD |
language |
en_US |
format |
Others
|
sources |
NDLTD |
topic |
LMS adaptive filter Low-power processing CADSP Floating gate transistors Speech processing systems Analog electronic systems Mobile computing Portable computers Programming Signal processing Digital techniques |
spellingShingle |
LMS adaptive filter Low-power processing CADSP Floating gate transistors Speech processing systems Analog electronic systems Mobile computing Portable computers Programming Signal processing Digital techniques Yoo, Heejong Low-Power Audio Input Enhancement for Portable Devices |
description |
With the development of VLSI and wireless communication
technology, portable devices such as personal digital assistants
(PDAs), pocket PCs, and mobile phones have gained a lot of
popularity. Many such devices incorporate a speech recognition
engine, enabling users to interact with the devices using
voice-driven commands and text-to-speech synthesis.
The power consumption of DSP microprocessors has been
consistently decreasing by half about every 18 months, following
Gene's law. The capacity of signal processing, however, is still
significantly constrained by the limited power budget of these
portable devices. In addition, analog-to-digital (A/D) converters
can also limit the signal processing of portable devices. Many
systems require very high-resolution and high-performance A/D
converters, which often consume a large fraction of the limited
power budget of portable devices.
The proposed research develops a low-power audio signal
enhancement system that combines programmable analog signal
processing and traditional digital signal processing. By
utilizing analog signal processing based on floating-gate
transistor technology, the power consumption of the overall
system as well as the complexity of the A/D converters can be
reduced significantly. The system can be used as a front end of
portable devices in which enhancement of audio signal quality
plays a critical role in automatic speech recognition systems on
portable devices. The proposed system performs background audio
noise suppression in a continuous-time domain using analog
computing elements and acoustic echo cancellation in a
discrete-time domain using an FPGA. |
author |
Yoo, Heejong |
author_facet |
Yoo, Heejong |
author_sort |
Yoo, Heejong |
title |
Low-Power Audio Input Enhancement for Portable Devices |
title_short |
Low-Power Audio Input Enhancement for Portable Devices |
title_full |
Low-Power Audio Input Enhancement for Portable Devices |
title_fullStr |
Low-Power Audio Input Enhancement for Portable Devices |
title_full_unstemmed |
Low-Power Audio Input Enhancement for Portable Devices |
title_sort |
low-power audio input enhancement for portable devices |
publisher |
Georgia Institute of Technology |
publishDate |
2005 |
url |
http://hdl.handle.net/1853/6821 |
work_keys_str_mv |
AT yooheejong lowpoweraudioinputenhancementforportabledevices |
_version_ |
1716474182117621760 |