70 lines
2.1 KiB
Text
70 lines
2.1 KiB
Text
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Speech Dispatcher:
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Key features:
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* Common interface to different TTS engines
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* Handling concurrent synthesis requests -- requests may come
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assynchronously from multiple sources within an application and/or
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from different applications
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* Subsequent serialization, resolution of conflicts and priorities of
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incomming requests
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* Context switching -- state is maintained for each client connection
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independently, event for connections from within one application
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* High-level client interfaces for popular programming languages
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* Common sound output handling -- audio playback is handled by Speech
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Dispatcher rather than the TTS engine, since most engines have limited
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sound output capabilities
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What is a very high level GUI library to graphics, Speech Dispatcher is
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to speech synthesis. The application neither needs to talk to the devices
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directly nor to handle concurrent access, sound output and other tricky
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aspects of the speech subsystem.
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Supported TTS engines:
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* Festival
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* Flite
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* Espeak
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* Cicero
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* IBM TTS
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* Espeak+MBROLA (through a generic driver)
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* Epos (through a generic driver)
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* DecTalk software (through a generic driver)
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* Cepstral Swift (through a generic driver)
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* Ivona
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* Pico
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Supported sound output subsystems:
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* OSS
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* ALSA
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* PulseAudio
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* NAS
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The architecture is based on a client/server model. The clients are all
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the applications in the system that want to produce speech (typically
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assistive technologies). The basic means of client communication with
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Speech Dispatcher is through a Unix socket or Inet TCP connection using
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the Speech Synthesis Interface Protocol (See the SSIP documentation for
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more information). High-level client libraries for many popular
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programming languages implement this protocol to make its usage as
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simple as possible.
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Supported client interfaces:
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* C/C++ API
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* Python 3 API
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* Java API
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* Emacs Lisp API
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* Common Lisp API
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* Guile API
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* Simple command line client
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Existing assistive technologies known to work with Speech Dispatcher:
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* speechd-el
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* Orca (see http://live.gnome.org/Orca/SpeechDispatcher)
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* Yasr
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* LSR
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* BrlTTY
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