language_identifier_scope

Enables automatic language identification and sets its scope.

Value
  • user-defined (default): automatically identify the language when the application explicitly labels a block of text as unknown.
  • message: automatically identify the language on each input message (typically a sentence).
  • none: disable the feature

How to set

Shown in precedence order (see Configuration precedence):

Set in the session xml file for the application. Configure the <speechsynth> element located under <sessionparameters>, <speechserver>.

API—Set as TTS_PARAM_LID_SCOPE.

Usage

Seldom used (because the default is usually satisfactory).

For a user-defined scope, you can label a block of input text as having an unknown language:

Control sequence: <ESC>\lang=unknown\

SSML:  xml:lang="unknown"

For each text region where the language is unknown, Vocalizer detects the language on a sentence-by-sentence basis:

  1. Vocalizer identifies the language Vocalizer
  2. If the current voice does not support the language, and Vocalizer detects another voices that does, it selects the new voice.
  3. Vocalizer restores the original voice at the end of the synthesis operation or when it encounters an <ESC> \lang=normal\ control sequence.

Related properties:

language_identifier_mode

language_identifier_languages