09-03-2011, 04:51 PM
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ABSTRACT
In its most generic sense a voice portal can be defined as "speech enabled
access to Web based information". In other words, a voice portal provides
telephone users with a natural language interface to access and retrieve Web
content. An Internet browser can provide Web access from a computer but
not from a telephone. A voice portal is a way to do that.
Here we would describe the various technology factors that are making voice portal the next big opportunity on the web as well as the various approaches service providers and developers of voice portal solutions can follow to maximize this exciting new market opportunity anywhere.
Speech-enabled internet portals or voice portals are quickly becoming the hottest trend in E-commerce-broadening the access to internet content to everyone with the most universal communications device of all, a telephone. Customers just dial into voice portal's prescribed number and they use simple voice commands to access whatever information they need. It's quick, easy and effective.
INTRODUCTION
Definition:
In its most generic sense a voice portal can be defined as "speech enabled access to Web based information". In other words, a voice portal provides telephone users with a natural language interface to access and retrieve Web content. An Internet browser can provide Web access from a computer but not from a telephone. A voice portal is a way to do that.
Overview:
The voice portal market is exploding with enormous opportunities for service providers to grow business and Revenues Internet access uses rapidly advancing speech Recognition technology to give users any time Communication and access-the Human Voice- over an office, wireless, or home phone. Here we would describe the various technology factors that are making voice portal the next big opportunity on the web as well as the various approaches service providers and developers of voice portal solutions can follow to maximize this exciting new market opportunity anywhere.
WHY VOICE
Natural speech is modality used when communicating with other people. This makes it easier for a user to learn the operation of voice-activate services.
As an output modality, speech has several advantages:
Auditory input does not interfere with visual tasks, such as driving a car.
It allows for easy incorporation of sound-based media, such as radio broadcasts, music, and voice-mail messages.
Advances in TTS (Text To Speech) technology mean text information can be transferred easily to the user.
Natural speech also has an advantage as an input modality, allowing for hands-free and eyes-free use.
With proper design, voice commands can be created that are easy for a user to remember.
These commands do not have to compete for screen space.
Speech can be used to create an interface that is easy to use and requires a minimum of user attention.
SPEECH TECHNOLOGY
This voice portals uses speech technology in order to build applications that make computers available everywhere. It also brings together the spoken language components together with other modes of human-computer interaction to form a unified, consistent computing environment.
Speech technology has been categorized into following:
Automatic Speech Recognition
Speech authentication
Text to speech
Automatic Speech Recognition
Automatic Speech Recognition (ASR) is technology that allows a computer to identify the words that a person speaks into a microphone or telephone. Depending on how the task is constrained, different levels of performance can be attained; for example, recognition of continuous digits over a microphone channel (small vocabulary, no noise) can be greater than 99%. If the system is trained to learn an individual speaker's voice, then much larger vocabularies are possible, although accuracy drops to somewhere between 90% and 95% for commercially-available systems. For large-vocabulary speech recognition of different speakers over different channels, accuracy is no greater than 87%, and processing can take hundreds of times real-time.
The dominant technology used in ASR is called the Hidden Markov Model, or HMM. This technology recognizes speech by estimating the likelihood of
each phoneme at contiguous, small regions (frames) of the speech signal. Each word in a vocabulary list is specified in terms of its component phonemes. A search procedure is used to determine the sequence of phonemes with the highest likelihood. The phoneme sequence with the highest total likelihood is identified with the word that was spoken.
Speech Authentication
When passwords are guessed or stolen, we usually aren't aware of the loss at the time. On the other hand, with smart cards and the like, the likelihood of a scam is reduced. To break into an account, someone would have to steal your smart card, but then you'd be more likely to know of the loss in time to do something about it.
Because speech authentication is completed over a telephone with no additional hardware or software required for the end user, it is the only biometric that can be implemented today for an entire customer base. Voice authentication can, of course, also be established by a user and his or her speech-enabled PC or handheld device.
Speech authentication is based on an analysis of the vibrations created in the human vocal tract. The shape of a person's vocal tract determines the timbre and resonance of the voice, and everyone's vocal tract is fairly distinct in shape and size.
ABSTRACT
In its most generic sense a voice portal can be defined as "speech enabled
access to Web based information". In other words, a voice portal provides
telephone users with a natural language interface to access and retrieve Web
content. An Internet browser can provide Web access from a computer but
not from a telephone. A voice portal is a way to do that.
Here we would describe the various technology factors that are making voice portal the next big opportunity on the web as well as the various approaches service providers and developers of voice portal solutions can follow to maximize this exciting new market opportunity anywhere.
Speech-enabled internet portals or voice portals are quickly becoming the hottest trend in E-commerce-broadening the access to internet content to everyone with the most universal communications device of all, a telephone. Customers just dial into voice portal's prescribed number and they use simple voice commands to access whatever information they need. It's quick, easy and effective.
INTRODUCTION
Definition:
In its most generic sense a voice portal can be defined as "speech enabled access to Web based information". In other words, a voice portal provides telephone users with a natural language interface to access and retrieve Web content. An Internet browser can provide Web access from a computer but not from a telephone. A voice portal is a way to do that.
Overview:
The voice portal market is exploding with enormous opportunities for service providers to grow business and Revenues Internet access uses rapidly advancing speech Recognition technology to give users any time Communication and access-the Human Voice- over an office, wireless, or home phone. Here we would describe the various technology factors that are making voice portal the next big opportunity on the web as well as the various approaches service providers and developers of voice portal solutions can follow to maximize this exciting new market opportunity anywhere.
WHY VOICE
Natural speech is modality used when communicating with other people. This makes it easier for a user to learn the operation of voice-activate services.
As an output modality, speech has several advantages:
Auditory input does not interfere with visual tasks, such as driving a car.
It allows for easy incorporation of sound-based media, such as radio broadcasts, music, and voice-mail messages.
Advances in TTS (Text To Speech) technology mean text information can be transferred easily to the user.
Natural speech also has an advantage as an input modality, allowing for hands-free and eyes-free use.
With proper design, voice commands can be created that are easy for a user to remember.
These commands do not have to compete for screen space.
Speech can be used to create an interface that is easy to use and requires a minimum of user attention.
SPEECH TECHNOLOGY
This voice portals uses speech technology in order to build applications that make computers available everywhere. It also brings together the spoken language components together with other modes of human-computer interaction to form a unified, consistent computing environment.
Speech technology has been categorized into following:
Automatic Speech Recognition
Speech authentication
Text to speech
Automatic Speech Recognition
Automatic Speech Recognition (ASR) is technology that allows a computer to identify the words that a person speaks into a microphone or telephone. Depending on how the task is constrained, different levels of performance can be attained; for example, recognition of continuous digits over a microphone channel (small vocabulary, no noise) can be greater than 99%. If the system is trained to learn an individual speaker's voice, then much larger vocabularies are possible, although accuracy drops to somewhere between 90% and 95% for commercially-available systems. For large-vocabulary speech recognition of different speakers over different channels, accuracy is no greater than 87%, and processing can take hundreds of times real-time.
The dominant technology used in ASR is called the Hidden Markov Model, or HMM. This technology recognizes speech by estimating the likelihood of
each phoneme at contiguous, small regions (frames) of the speech signal. Each word in a vocabulary list is specified in terms of its component phonemes. A search procedure is used to determine the sequence of phonemes with the highest likelihood. The phoneme sequence with the highest total likelihood is identified with the word that was spoken.
Speech Authentication
When passwords are guessed or stolen, we usually aren't aware of the loss at the time. On the other hand, with smart cards and the like, the likelihood of a scam is reduced. To break into an account, someone would have to steal your smart card, but then you'd be more likely to know of the loss in time to do something about it.
Because speech authentication is completed over a telephone with no additional hardware or software required for the end user, it is the only biometric that can be implemented today for an entire customer base. Voice authentication can, of course, also be established by a user and his or her speech-enabled PC or handheld device.
Speech authentication is based on an analysis of the vibrations created in the human vocal tract. The shape of a person's vocal tract determines the timbre and resonance of the voice, and everyone's vocal tract is fairly distinct in shape and size.
