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Input is data received by humans or machines that is used to produce an output or result. Voice recognition is a type of input that allows machines to understand spoken commands through software. The document traces the history of voice recognition from its beginnings in the 1950s recognizing only digits to its current use in applications like in-car systems, healthcare, education, and the military. It describes how voice recognition works by capturing the voice, extracting it, decoding it using acoustic or language models, and converting it into a digital signal for the software to interpret and act on. Potential drawbacks include lack of accuracy, misinterpretation due to inability to understand context, time costs during initial adaptation periods, errors from accents or speech patterns, and interference

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167 views2 pages

Summary of Presentation

Input is data received by humans or machines that is used to produce an output or result. Voice recognition is a type of input that allows machines to understand spoken commands through software. The document traces the history of voice recognition from its beginnings in the 1950s recognizing only digits to its current use in applications like in-car systems, healthcare, education, and the military. It describes how voice recognition works by capturing the voice, extracting it, decoding it using acoustic or language models, and converting it into a digital signal for the software to interpret and act on. Potential drawbacks include lack of accuracy, misinterpretation due to inability to understand context, time costs during initial adaptation periods, errors from accents or speech patterns, and interference

Uploaded by

DineshPabbi
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Summary Of Presentation

Submitted by- Dinesh


Pabbi(2015CSA1453)
What is an Input?

Input is the data received by humans/machines according to which they


produce result/output.

Input is given by an input device.

Examples of input devices areMouse , Keyboard , Scanner , Mic (for voice recognition) etc

What is Voice recognition


Voice or speech recognition is the ability of a machine or program to receive,
understand and carry out spoken commands.
These commands are usually pre defined in the form of software and hence carry
out commands only understood by the software.
So voice recognition is way of giving an input.

History of Voice recognition

1950s and 1960s: Baby Talk-The first speech recognition systems could
understand only digits. (Given the complexity of human language, it makes
sense that inventors and engineers first focused on numbers.) Bell
Laboratories designed in 1952 the "Audrey" system, which recognized digits
spoken by a single voice.

1970s: Speech Recognition Takes Off-The DoD's DARPA Speech Understanding


Research (SUR) program, from 1971 to 1976, was one of the largest of its
kind in the history of speech recognition.

2000s: Speech Recognition Plateaus--Google Comes Along-Speech


recognition technology development began to edge back into the forefront
with one major event: the arrival of the Google Voice Search app for the
iPhone and android.

The Future: Accurate, Ubiquitous Speech-The explosion of voice recognition


apps indicates that speech recognition's time has come, and that you can
expect plenty more apps in the future.

Use of Voice recognition

In-car systems- Simple voice commands may be used to initiate phone calls,
select radio stations or play music from a compatible smartphone, MP3 player
or music-loaded flash drive. Voice recognition capabilities vary between car
make and model.

Health care-Prolonged use of speech recognition software in conjunction


with word processor has shown benefits to short-term-memory restrengthening.

Military- Substantial efforts have been devoted in the last decade to the test
and evaluation of speech recognition in fighter aircraft.

Usage in education and daily life-For language learning, speech recognition


can be useful for learning a second language. It can teach proper
pronunciation, in addition to helping a person develop fluency with their
speaking skills.

Working of Voice recognitionVoice recognition being a unique input requires a way to capture, process and
decode the command received. When a voice input is given, the extractor
extracts the voice and passes it to decoder based on either acoustic or language
model. This decoded voice input is converted into digital signal and the software
studies the digital command and gives output accordingly. The diagram shows
the basic working of a voice recognition system.

Drawbacks of Voice recognition

LACK OF ACCURACY AND MISINTERPRETATION-Programs cannot understand


the context of language the way that humans can, leading to errors that are
often due to misinterpretation.

TIME COSTS AND PRODUCTIVITY-Some Programs adapt to your voice and


speech patterns over time; this may slow down your workflow until the
program is up to speed.

ERROR DUE TO ACCENTS AND SPEECH RECOGNITION-Voice recognition


systems can have problems with accents.

NOISE INTERFERENCE-To get the best out of voice recognition software, you
need a quiet environment which is not always possible.

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