Browse Definitions:
Definition

Speech Application Program Interface (SAPI)

Contributor(s): Joe Joseph

SAPI (Speech Application Program Interface) is an application program interface (API) provided with the Microsoft Windows operating system that allows programmers to write programs that offer text-to-speech and speech recognition capabilities. Interfaces are provided for the C, C++, and Visual Basic programming languages. Using Microsoft's COM (Component Object Model) architecture, SAPI is the most widely used speech application program interface used today. In the future, Microsoft plans to embed speech technology using SAPI into their operating system.

SAPI has seven main components:

  • Voice Command: Voice Command is a high-level interface that provides command and control speech recognition for applications. Voice Command allows a developer to create a Voice Command menu that contains voice commands, such as "new file" or "send mail to someone@anywhere.net" that a user speaks into a microphone or other audio device. The user can control the computer without needing a keyboard or mouse.
  • Voice Dictation: Voice Dictation allows the user to dictate into any application that supports speech recognition. An invisible or virtual edit box receives the text the user dictates and displays the text in an application window. Voice Dictation allows text formatting such as capitalization, translation of punctuation words into punctuation symbols, built-in glossary entries, and correction of the last word spoken or a selected word. Applications that use Voice Dictation classify speech by topics that use different language styles. Topics include e-mail speech, formal writing, or programming speech. Voice Dictation stores the information for each topic on your hard drive.
  • Voice Text: Voice Text converts text into speech that is played over computer speakers or sent over a telephone line. The speech played has several different modes, each with a different voice.
  • Voice Telephony: Voice Telephony uses telephony controls that are similar to Windows controls. Windows controls include buttons, list boxes, sliders and other objects that can be manipulated by a mouse or keyboard. Telephony controls are codes that recognize spoken responses such as Yes or No, your phone number, the date, and the time. Telephony controls create a dialogue between the user and the computer. For example, a user calls a vendor to order an item. The user then answers several questions by speaking into the telephone receiver. The telephony controls recognize these responses and sends them to the application that processes responses. Telephony controls also handle error conditions (these are common with spoken numbers or when the caller does not respond) and variations of answers such as "January 4th" or "tomorrow."
  • Direct Speech Recognition: This is a low-level interface similar to Voice Command. The main difference is Direct Speech Recognition speaks directly to the speech engine. This gives the application more control and speed.
  • Direct Text To Speech : This is a low-level interface similar to Voice Text that also speaks directly to the speech engine.
  • Audio Objects: An Audio Object tells the speech engine where to get its audio.

The future of speech technology will include products that allow you to do such things as surfing the Internet using speech and asking your television what is showing tonight. Software developers are developing applications that understand concepts. For example, if you tell your computer to print a certain document, your application will know whether to print it on your printer or the network's printer. Speech technology is important for medical professionals, law enforcement personnel, the physically handicapped, as well as many business and home users.

This was last updated in August 2005

Continue Reading About Speech Application Program Interface (SAPI)

Start the conversation

Send me notifications when other members comment.

By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

Please create a username to comment.

-ADS BY GOOGLE

File Extensions and File Formats

Powered by:

SearchCompliance

  • smart contract

    A smart contract, also known as a cryptocontract, is a computer program that directly controls the transfer of digital currencies...

  • risk map (risk heat map)

    A risk map, also known as a risk heat map, is a data visualization tool for communicating specific risks an organization faces. A...

  • internal audit (IA)

    An internal audit (IA) is an organizational initiative to monitor and analyze its own business operations in order to determine ...

SearchSecurity

  • evil maid attack

    An evil maid attack is a security exploit that targets a computing device that has been shut down and left unattended.  An evil ...

  • Common Body of Knowledge (CBK)

    In security, Common Body of Knowledge (CBK) is a comprehensive framework of all the relevant subjects a security professional ...

  • rootkit

    A rootkit is a program or, more often, a collection of software tools that gives a threat actor remote access to and control over...

SearchHealthIT

  • value-based healthcare

    Value-based healthcare, also known as value-based care, is a payment model that rewards healthcare providers for providing ...

  • health informatics

    Health informatics is the practice of acquiring, studying and managing health data and applying medical concepts in conjunction ...

  • clinical trial

    A clinical trial, also known as a clinical research study, is a protocol to evaluate the effects and efficacy of experimental ...

SearchDisasterRecovery

  • crisis communication

    Crisis communication is a method of corresponding with people and organizations during a disruptive event to provide them with ...

  • Zerto

    Zerto is a storage software vendor that specializes in enterprise-class business continuity and disaster recovery in virtual and ...

  • crisis management plan (CMP)

    A crisis management plan (CMP) is a document that outlines the processes an organization will use to respond to a critical ...

SearchStorage

  • SSD write cycle

    An SSD write cycle is the process of programming data to a NAND flash memory chip in a solid-state storage device.

  • data storage

    Data storage is the collective methods and technologies that capture and retain digital information on electromagnetic, optical ...

  • hard disk

    A hard disk is part of a unit -- often called a disk drive, hard drive or hard disk drive -- that stores and provides relatively ...

SearchSolidStateStorage

  • hybrid hard disk drive (HDD)

    A hybrid hard disk drive is an electromechanical spinning hard disk that contains some amount of NAND Flash memory.

Close