If you’ve never seen speech recognition demonstrated by a trained user, you’re in for a shock. A person speaks into a microphone headset and, as they speak, the words pop up on the screen. It is amazing to watch and even more amazing to use it.
With recent speech products you can speak at a normal speaking speed (about 120 words per minute).
How does Speech Recognition work?
Speech Recognition programs use probability and mathematical functions to determine the most likely word or phrase. To identify what is spoken, the computer goes through these five steps:
- Speech input (User)
- Prefiltering
- Feature extraction
- Comparison and matching
- Text output
After you install the program, the user should undergo training but if you use Dragon NaturallySpeaking you can still achieve a reasonable result without it. Having said that, it is certainly better to go through the training process. This involves reading aloud from a prepared text for a minimum of five minutes. The computer listens to this dictation and the software analyzes how the user pronounces each word. It then stores the data and prepares a unique user profile for the user.
Further improvement in speech recognition occurs as you continue to use the software and correct recognition errors. The Speech Recogniton software becomes more accurate as it learns your particular speaking style. Dragon NaturallySpeaking offers to analyse your email and documents to assess and register the vocabulary you use. This is an additional bonus not found in Windows 7 Speech Recognition program.
Who uses Speech Recognition?
Users of speech recognition products are mostly professional people who use words extensively as part of their job. Most of them are already comfortable speaking their thoughts. So you will find lawyers, doctors, and teachers are the early adopters.
People with disabilities limiting their use of the computer keyboard or mouse can find speech recognition programs a boon as they can perform many computer tasks ranging from writing documents to sending email. This can be liberating for them.
What are the advantages in using Speech Recognition?
- You can “command and control” the computer simply by using your voice. This means you can command and control:
- Menus and dialog boxes
- Edit and format text
- Launch applications
- Open and save files
- Cut and paste
Other Benefits:
- You can also speak faster than you can type.
- While your fingers may develop muscle fatigue, your voice will not.
- The computer knows how to spell many of the words you speak probably better than you do.
For Speech Recognition to be effective you need a fast and powerful personal computer, up-to-date software compatable with Windows 7 and to enrol in its training program so that it can recognize your voice.
Hardware Requirements for Speech Recognition
Here is a list of essential hardware requirements to run speech recognition software efficiently.
- CPU: Minimum 2.4 GHz Pentium® III/IV Processor IBM-compatible PC – the more powerful Dual Core and Quad Core CPUs are better.
- Operating System: For versions higher than Version 9.5 Dragon NaturallySpeaking you will need Vista or Windows 7.
- Sound Card: Industry standard 16 bit sound card or built-in audio systems on desktops and portables, including the Creative Labs SoundBlaster® 16 or higher
- Hard Disk Requirements: 40 GIG or higher – you need 1 GIG for program storage and 40-60+ Mbytes for user voice file.
- Memory Requirements: Minimum 1 GIG RAM – the more the better! I have 3 GIG on the laptop and 4 GIG on the Desktop.
- Microphone Headset: A good quality USB from these sources:
- Andrea Electronics
- Plantronics
- Sennheiser
- Logitech
Speech Recognition Software
The Main Players
There have been many take-overs in the Speech Recognition industry. ScanSoft, once a big player, was taken over by Nuance. Similarly, IBM’s speech recognition software was sold off to ScanSoft in 2003. MacSpeech is powered by Dragon NaturallySpeaking engine. This makes Nuance the lead player in Speech Recognition.
- Dragon NaturallySpeaking (Version: Standard. Preferred, Professional, Medcial and Legal)
- Microsoft Windows Speech Recognition (Windows Vista and Windows 7)
- MacSpeech (Versions MacSpeech Dictate, MacSpeech Medical and MacSpeech Legal . All powered by Dragon NaturallySpeaking engine.
Catering for Different Languages and Different English Accents
- Microsoft Speech Recognition is available in English (U.S.), English (U.K.), German (Germany), French (France), Spanish (Spain), Japanese, Chinese (Traditional), and Chinese (Simplified).
- Dragon NaturallySpeaking is available in English, French, German, Spanish, Italian and Dutch language versions. The English versions cater for the following accents, US, UK, Australian, Indian, and SE Asian.
- MacSpeech caters for 13 English language variations, nine with U.S. spelling and four with U.K. spelling.
In the next post on Speech Recognition we’ll look at these aspects:
In this post we’ll be looking at Windows 7 Speech Recognition program and considering these aspects:
- Accessing Windows 7 Speech Recognition
- Training the Software
- Reviewing Speech Recognition Commands
- Taking the Speech Tutorial
Read Related Posts
-
Looking at Speech Recognition Programs Part 1
-
Looking at Speech Recognition Part 3
-
How to Use Speech Recognition with Windows 7
-
Looking at Speech Recognition Part 4
-
Windows 7 Speech Recognition Profile Tool
Windows 7 Family Pack Supplies Running Low
Copies of the Windows 7 Family Pack, which includes three upgrade licenses for Windows 7 Home Premium, are becoming harder to find in the United States, both in retail stores and online. The offer, announced by Microsoft in July and offered for $150, was said to be “while supplies last,” but I don’t think anyone was expecting supplies to run so low so soon.
Microsoft issued a brief statement about the shortage of copies:
This is bad for consumers, especially as the holiday season approaches in the midst of the recession – late shoppers may find themselves out of luck if they attempt to purchase the Family Pack as a gift.
It’s also bad in a general sense, as it eliminates the most reasonably-priced Windows 7 upgrade from Microsoft’s product lineup. I know that business is business and you have to do what’s best for the bottom line, but this leaves the cheapest Windows 7 upgrade option sitting at $119 for an upgrade pack of Windows 7 Home Premium. OEM copies of the OS are slightly cheaper, sitting around $100, but that’s still twice as expensive as a Family Pack license and not technically legal for individuals, besides. All of a sudden, Windows 7 is a slightly harder sell – not something Microsoft needs.
Microsoft has said in the past that it might make the Family Pack a more permanent offering depending on consumer response, but they’ve said nothing to indicate that they plan on replenishing supplies. Tell us how you feel about this situation in the comments section!
Read Related Posts