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int | refcount |
| Reference count. More...
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char * | name |
| Printable name for this feature type.
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int32 | cepsize |
| Size of input speech vector (typically, a cepstrum vector)
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int32 | n_stream |
| Number of feature streams; e.g., 4 in Sphinx-II.
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uint32 * | stream_len |
| Vector length of each feature stream.
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int32 | window_size |
| Number of extra frames around given input frame needed to compute corresponding output feature (so total = window_size*2 + 1)
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int32 | n_sv |
| Number of subvectors.
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uint32 * | sv_len |
| Vector length of each subvector.
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int32 ** | subvecs |
| Subvector specification (or NULL for none)
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mfcc_t * | sv_buf |
| Temporary copy buffer for subvector projection.
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int32 | sv_dim |
| Total dimensionality of subvector (length of sv_buf)
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cmn_type_t | cmn |
| Type of CMN to be performed on each utterance.
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int32 | varnorm |
| Whether variance normalization is to be performed on each utt; Irrelevant if no CMN is performed.
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agc_type_t | agc |
| Type of AGC to be performed on each utterance.
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void(* | compute_feat )(struct feat_s *fcb, mfcc_t **input, mfcc_t **feat) |
| Feature computation function. More...
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cmn_t * | cmn_struct |
| Structure that stores the temporary variables for cepstral means normalization.
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agc_t * | agc_struct |
| Structure that stores the temporary variables for acoustic gain control.
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mfcc_t ** | cepbuf |
| Circular buffer of MFCC frames for live feature computation. More...
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mfcc_t ** | tmpcepbuf |
| Array of pointers into cepbuf to handle border cases. More...
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int32 | bufpos |
| Write index in cepbuf. More...
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int32 | curpos |
| Read index in cepbuf. More...
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mfcc_t *** | lda |
| Array of linear transformations (for LDA, MLLT, or whatever)
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uint32 | n_lda |
| Number of linear transformations in lda. More...
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uint32 | out_dim |
| Output dimensionality.
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Definition at line 117 of file feat.h.
◆ bufpos
Write index in cepbuf.
Definition at line 156 of file feat.h.
◆ cepbuf
Circular buffer of MFCC frames for live feature computation.
Definition at line 154 of file feat.h.
◆ compute_feat
void(* feat_s::compute_feat) (struct feat_s *fcb, mfcc_t **input, mfcc_t **feat) |
Feature computation function.
- Parameters
-
fcb | the feat_t describing this feature type |
input | pointer into the input cepstra |
feat | a 2-d array of output features (n_stream x stream_len) |
- Returns
- 0 if successful, -ve otherwise.
Function for converting window of input speech vector (input[-window_size..window_size]) to output feature vector (feat[stream][]). If NULL, no conversion available, the speech input must be feature vector itself.
Definition at line 148 of file feat.h.
◆ curpos
Read index in cepbuf.
Definition at line 157 of file feat.h.
◆ n_lda
Number of linear transformations in lda.
Definition at line 160 of file feat.h.
◆ refcount
Reference count.
Definition at line 118 of file feat.h.
◆ tmpcepbuf
mfcc_t** feat_s::tmpcepbuf |
Array of pointers into cepbuf to handle border cases.
Definition at line 155 of file feat.h.
The documentation for this struct was generated from the following file: