Microsoft Speech Platform

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ISpPhoneticAlphabetConverter

New in SAPI 5.3

Enables applications to convert phonemes from SAPI to the Universal Phone Set (UPS) and from UPS to SAPI.

New applications should use the UPS phone set. To use this interface, applications must call SetLangId to set the language in use, hence the phone set, to which the SAPI phonemes belong. Then it can call the SAPI2UPS and UPS2SAPI methods to perform alphabet conversions.

When to Use

Legacy applications using SAPI phone sets can use this interface to convert existing pronunciations to the UPS phone set. These languages use a SAPI phone set:

• English (en-US)
• Chinese (zh-CN)
• German (de-DE)
• Spanish (es-SP)
• French (fr-FR)
• Japanese (ja-JP)

In addition, SAPI supports the UPS for those and all other languages. Thus, alphabet conversion only applies to the above languages.

Implemented By

• SpPhoneConverter

Methods in Vtable Order

ISpPhoneticAlphabetConverter Methods	Description
GetLangId	Gets the LANGID of the language of the SAPI phone set being used for conversion.
GetMaxConvertLength	Get the maximum length of a string after conversion.
SAPI2UPS	Returns the UPS phone id of the specified SAPI phone.
SetLangId	Sets the language of the SAPI phone set to be used in the conversion.
UPS2SAPI	Returns the SAPI phone id of the specified UPS phone.