This website uses cookies to ensure you have the best experience. Learn more

How Speech Recognition Works.

637 words - 3 pages

Speech RecognitionIntroductionHow does a computer convert speech into data that it can then manipulate or execute? Initially, when we speak, a microphone converts the analogue signal of our voice into digital chunks of data that the computer must analyze. It is from this data that the computer must extract enough information to confidently guess the word being spoken. This is not exactly an easy task for a computer. In fact, in the early 1990s, the best recognizers were yielding a 15% error rate on a relatively small 20,000 word dictation task. Now though, that error percentage has dropped to as low as 1-2%, although this can vary greatly between speakers. So how is this done?PhonemesPhonemes are best described as linguistic units. They are the sounds that group together to form our words, although quite how a phoneme converts into sound depends on many factors including the surrounding phonemes, speaker accent and age. Here are a few examples:aafatheraecatahcutaodogawfoulngsingttalkththinuhbookuwtoozhpleasureEnglish uses about 40 phonemes to convey the 500,000 or so words it contains, making them a relatively good data item for speech engines to work with.Phonemes are often extracted by running the waveform through a Fourier Transform. This allows the waveform to be analyzed in the frequency domain. So, what does this mean? It is easier to understand this principle by looking at a spectrograph. A spectrograph is a 3D plot of a waveform's frequency and amplitude versus time. In many cases though, the amplitude of the frequency is expressed as a colour (either greyscale, or a gradient colour). For example, if I said "Countash" which contains the "sh" phoneme and "assure" which contains the "ss" phoneme, the two phoneme's would appear almost the same on a spectrogram even though they are used in a different context, although the timescale would be slightly different. This shows that it is relatively easy to match up the amplitudes and...

Find Another Essay On How Speech Recognition Works.

Making a Speech Recognition System that Understands Malayalam Words

1144 words - 5 pages 1. INTRODUCTION Speech is the most effective mode of communication used by humans. Automatic speech recognition can be defined as a technology which enables a system to recognize the input speech signals and interpret the meaning, after which the system should be able to generate some control signals. 1.1 AIM Aim of this project is to realize an Automatic Speech Recognition system in hardware which is able to understand limited Malayalam words

Voice Recognition Systems Essay

1248 words - 5 pages Voice Recognition Systems *Works Cited Not Included About twenty years ago voice recognition systems were only see on the science fiction channel of the television and the viewer could only dream of the day when that technology would be possible. I know that when I was younger I would watch Star Trek and see Captain Kirk address the computer by talking to it, and not only did the computer understand his instructions, but

Managing Information Systems In Organizations

2544 words - 10 pages exciting useful tool for computer science. Voice technology is a valuable tool for individuals as a time saver, a necessary tool for the disabled, and has several practical uses in business. In Esther Schindler’s book, The Computer Speech Book, she talks about the need for a voice recognition system: “Right now, to communicate with any computer, you have to learn how to use essentially arbitrary hardware and software. You have to learn how to

Module 1: Why do we care about Human-Computer Interaction? - Case Study

1038 words - 5 pages some hiccups for example Apple’s Siri, has trouble misinterpreting some commands. I had issues with this when I had an IPhone. It is still in the works and is constantly improving. Speech is not “cookie cutter” and what I mean by that is the fact that when developing a speech recognition interface for the masses, it has to be able to conform and cater to the individual user. People speak in different languages as well as have accents and the

Do Hong Kong people showed a high concern towards national events and high recognition on their national identity

383 words - 2 pages I agree with this view to a large extend. I believe that participating on the nation's major events such as economic, social, political events will enhance Hong Kong people's national identity as a Chinese people.Firstly, the magnitude 8 earthquake occurred in Wenchuan of Sichuan in May2008, we can see that many Hong Kong citizens participated actively in the relief works. Hong Kong people showed their recognition towards their identity of

Innovations in Handwriting Recognition

886 words - 4 pages classes (patterns). Quick development of neural networks promotes concept of the pattern recognition by proposing intelligent systems such as handwriting recognition, speech recognition and face recognition. In particular, Problem of handwriting recognition has been considered significantly during the last decades in the academic and industrial fields by employing types of direct matching. Performance of this recognition has been paying strong

EXPLORE Journal 1

559 words - 3 pages recognize those patterns on its own -Some linguists try to find the way sounds and words make patterns acoustically to make computer speech recognition, and also study how the mouth moves when it produces each sound -Some linguists try to improve education of a certain language by finding patterns in that language and also how that language is learned -Linguists study things including: -Studying why humans have a natural understanding of

Free Speech Zones

2317 words - 10 pages novel issues for campuses, with students and faculty using the World Wide Web to communicate disputed ideas, such as that the Holocaust did not occur, that either are offensive to many and arguably wrong, or to provide access to materials such as pornography that some find repulsive (Hall, 2012). Works Cited Fisher, M. (2008). Free Speech v. Censorship. (Cover story). Community College Week, 20(19), 6-7. Gordon , L. (2012, September 18). Bias

Speech Processing Filtering Through Various Multi-Channel Cochlear Implants

2289 words - 9 pages (NIDCD,2013). While many recipients of this innovative device report various levels of success, there remain to be common reports of difficulty with speech processing, especially in the presence of noise. These patient concerns, while complex in each individual case, poses the research question of how many electrodes (or channels) in a cochlear implant are necessary for good speech recognition? This question will be analyzed further in this paper in

Biometric Authentication Technology

1262 words - 5 pages . (2011, Nov 2). Speech Recognition Through the Decades: How We Ended Up With Siri. Retrieved from TechHive: The Autry national Center of the American West. (2014). Retrieved from The Autry:

Language functions as told through figure skating: What skating can teach us about language.

1630 words - 7 pages Anthropologist Dr. William Beeman described the six basic language functions in humans as follows: recognition, storage, physical generation, writing, discourse and expressive culture (lecture presentation, January 19, 2010). Each of these functions plays a part in how language is used. Drawing on Beeman’s lectures and personal experience, I will demonstrate how creating and performing an ice-skating free-style routine highlights each of the

Similar Essays

Wireless Speech Recognition

1209 words - 5 pages : A Space Odyssey. We are now in the year 2001 and we are way past HAL in the field of speech recognition. The technology has come a long way from being able to detect only monotone, machine like language on an inconsistent basis. Today's technologies train the machine to learn how the user talks, and detect the speed of the user's speech, detect any accent the user may have, and other aspects that make each user's speech different. For a long

Speech Recognition

1085 words - 4 pages input by talking. Speech is basically just another user interface, an input method, like using a mouse or a keyboard. According to Webster Speech recognition is simply, it “converts spoken words to text”. If you are not familiar with the term speech recognition it goes by other terms such as automatic speech recognition, computer speech recognition and speech to text. Speech recognition works like this, first you speak into a microphone that is

Speech Recognition

2547 words - 10 pages and with 128 MB RAM). Speech-recognition technology works through a series of complicated algorithms that translate math into words and a program that processes the words. Smaller speech-recognition systems that recognize around 100 words compare sets of acoustic features that are measured in a user's speech with those stored in patterns in templates. But to make a system that will recognize whole vocabularies and multiple voices, developers

Speech Recognition

2808 words - 11 pages Speech Recognition Nowadays, computer systems play a major role in our lives. They are used everywhere beginning with homes, offices, restaurants, gas stations, and so on. Nonetheless, for some, computers still represent the machine they will never know how to use. Communicating with a computer is done using a keyboard or a mouse, devices many people are not comfortable using. Speech recognition solves this problem and destroys the