TTS
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... text into audio, also known as Text-to-Speech (TTS). Many multimedia
applications can benefit from having automatic speech recognition
...
... (ASR) and text-to-speech (TTS) processing available as a distributed,
network resource. This requirements ...
... There is a broad range of systems that can benefit from a unified
approach to control of TTS, ASR, and SI/SV. These include
...
... performs the back-end speech processing. It may generate an RTP
stream as output based on text input (TTS) or return recognition
results in response to an RTP stream as input (ASR ...
... the Application Server to control the ASR or TTS Server using
SPEECHSC as a control protocol ...
... 11] gateway may combine the ASR and TTS functions on the
same platform as the Media Processing Entity. Note that VoiceXML ...
... SPEECHSC. The following subsections provide a number of
example use cases of the SPEECHSC, one each for TTS, ASR, and SI/SV.
...
... TTS Example ...
... would most likely just output a busy signal to the POTS phone.
However, with SPEECHSC access to a TTS server, it can provide a
spoken error message. The VoIP ...
... SPEECHSC server, open an RTP stream between itself and the server,
and issue a TTS request for the error message, which will be played
to the user on the POTS phone.
...
... modalities of SPEECHSC may be inconvenient or simply inappropriate
for disabled users. Hearing-impaired individuals may find TTS of
limited utility. Speech-impaired users may be unable to make use of
ASR ...
... SPEECHSC framework what speech process produced the output. For
example, an RTP stream containing the spoken output of TTS should be
identifiable as TTS output, and the recognized utterance of ASR ...
... RTP stream containing the spoken output of TTS should be
identifiable as TTS output, and the recognized utterance of ASR
should be identifiable as having been produced by ASR ...
... TTS Requirements ...
... Application Server, using a control protocol, to request the TTS
Server to play back text as voice in an RTP stream.
...
...
The SPEECHSC framework MAY assume that all TTS servers are capable of
reading plain text. For reading plain text, framework MUST allow the
...
...
formatted text. Internationalization of TTS in the SPEECHSC
framework, including multi-lingual output within a single utterance,
is accomplished via SSML ...
... system is that user perception of the quality of the interaction
depends strongly on the ability of the user to interrupt a prompt or
rendered TTS with speech. Interrupting, or barging, the speech
output requires more than energy detection from the user's direction.
Many advanced systems halt the media towards the user by employing
...
... o Combination in series of engines that may then act on the input or
output of ASR, TTS, or Speaker recognition engines. The control
MAY then extend beyond such engines to include other audio input
...
... SDP.
TTS looks very much like playing back a file. Extending RTSP looks
promising for when one requires VCR controls ...