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SPPHRASE (SAPI 5.4)

Speech API 5.4
Microsoft Speech API 5.4

SPPHRASE

SPPHRASE contains information about speech recognition information, including hypotheses, false recognitions, recognitions, and alternate recognitions.

The information in the phrase includes, language, audio and event timing, text (display and lexicon), inverse text replacements, semantic tags (i.e., properties), and depending on the engine, an optional block of engine-specific phrase data.

SAPI typically provides the application with a pointer to a block of memory that has been allocated by CoTaskMemAlloc, which the application must free using CoTaskMemFree when it is finished with the phrase information.

typedef struct SPPHRASE
{
    ULONG                       cbSize;
    LANGID                      LangID;
    WORD                        wReserved;
    ULONGLONG                   ullGrammarID;
    ULONGLONG                   ftStartTime;
    ULONGLONG                   ullAudioStreamPosition;
    ULONG                       ulAudioSizeBytes;
    ULONG                       ulRetainedSizeBytes;
    ULONG                       ulAudioSizeTime;
    SPPHRASERULE                Rule;
    const SPPHRASEPROPERTY     *pProperties;
    const SPPHRASEELEMENT      *pElements;
    ULONG                       cReplacements;
    const SPPHRASEREPLACEMENT  *pReplacements;
    GUID                        SREngineID;
    ULONG                       ulSREnginePrivateDataSize;
    const BYTE                 *pSREnginePrivateData;
    LPWSTR                      pSML;
    SPSEMANTICERRORINFO        *pSemanticErrorInfo;
    SPSEMANTICFORMAT 	        SemanticTagFormat;
} SPPHRASE;

Members

cbSize
The size of this structure in bytes.
LangID
The language ID of the phrase elements.
wReserved
Reserved for future use.
ullGrammarID
ID of the grammar that contains the top-level rule used to recognize this phrase.
ftStartTime
Absolute time for start of phrase audio as a 64-bit value based on the Win32 APIs, SystemTimeToFileTime and GetSystemTime. When an application uses wav file input, SAPI sets the stream position and start time information to zero.
ullAudioStreamPosition
The starting offset of the phrase in bytes relative to the start of the audio stream. If downsampling an audio stream, ullAudioStreamPosition will be the byte position within the original stream.
ulAudioSizeBytes
Size of audio data, in bytes, for this phrase.
ulRetainedSizeBytes
Size, in bytes, of the retained audio data (in the user-specified retained-audio format).
See also ISpRecoContext::SetAudioOptions for more information about specifying the retained audio format
ulAudioSizeTime
Length of phrase audio in 100-nanosecond units.
Rule

Information about the top-level rule (and rule-reference hierarchy) used to recognize this phrase.

pProperties
Pointer to the root of the semantic-tag property tree.
pElements
Pointer to the array of phrase elements (the number of elements is contained in Rule). Each phrase element includes position and text information, including lexical and display forms.
cReplacements
Number of text replacements. Text replacements are generally based on engine-defined Inverse Text Normalization rules (e.g. recognize "five dollars" as "$5").
pReplacements
Pointer to the array of text replacements.
SREngineID

GUID that identifies the particular speech recognition (SR) engine that recognized this phrase.

ulSREnginePrivateDataSize
Size of the engine's private data, in bytes.
pSREnginePrivateData
Pointer to the engine's private data.
Engine private data is specific to each SR engine, and the format and structure of the data is not defined by SAPI.
pSML
Pointer to the SML (the XML containing the reco result).
pSemanticErrorInfo
Points to a structure containing the error information if an error occurred while generating the SML.
SemanticTagFormat
Specifies the value of the tag-format attribute in a grammar. For more information, see SPSEMANTICFORMAT. This member is defined only for SAPI 5.4 and later.
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