The field of computer science that deals with designing computer systems that can recognize spoken words. Note that voice recognition implies only that the computer can take dictation, not that it understands what is being said. Comprehending human languages falls under a different field of computer science called natural language processing.
A number of voice recognition systems are available on the market. The most powerful can recognize thousands of words. However, they generally require an extended training session during which the computer system becomes accustomed to a particular voice and accent. Such systems are said to be speaker dependent.
Many systems also require that the speaker speak slowly and distinctly and separate each word with a short pause. These systems are called discrete speech systems. Recently, great strides have been made in continuous speech systems — voice recognition systems that allow you to speak naturally. There are now several continuous-speech systems available for personal computers.
Because of their limitations and high cost, voice recognition systems have traditionally been used only in a few specialized situations. For example, such systems are useful in instances when the user is unable to use a keyboard to enter data because his or her hands are occupied or disabled. Instead of typing commands, the user can simply speak into a headset. Increasingly, however, as the cost decreases and performance improves, speech recognition systems are entering the mainstream and are being used as an alternative to keyboards.
- voice response system
A form of speech synthesis in which sentences are formed by concatenating pre-recorded words from a database. Unlike a TTS system, which uses speech synthesis to form spontaneous sentences and/or phrases based on human phonetics, a voice response system operates with a limited vocabulary in situations where the sentences and/or phrases that are formed follow […]
Voicemail is a computerized system that enables support for answering, storing and relaying telephone call messages. Also spelled as voice mail, voicemail records and stores incoming messages, enabling playback of the messages from the same phone number or from another telephone. Voicemail is a basic feature of most modern cellular telephones, digital phones and corporate […]
- VoIP call
A Voice over IP call, or VoIP call, utilizes packet-switched Voice over Internet Protocol (VoIP) or Internet telephony as opposed to the circuit-switched telephony used by the traditional Public Switched Telephone Network (PSTN). The advantage to VoIP phone calls is that unlike regular long-distance calls, calls made through a VoIP phone service are free – […]
- VoIP PBX
A Voice over Internet Protocol (VoIP) private box exchange (PBX) is a business telephone system that provides services similar to a standard PBX, but does so over a company’s LAN or WAN data network rather than through the circuit-switched networks used by the traditional Public Switched Telephone Network (PSTN). Also referred to as an IP […]
- VoIP service provider
A voice over Internet Protocol (VoIP) service provider offers VoIP Internet telephony solutions to residential and commercial customers. Also known as an Internet phone service provider, a VoIP service provider generally provides the VoIP hardware and services to subscribers at a monthly rate, although hosted VoIP services are also quite common. As with all VoIP […]