add blank scale for wfst decoding #1646
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thx, any numbers? |
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robin1001
reviewed
Jan 8, 2023
runtime/core/decoder/asr_decoder.cc
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| @@ -107,6 +107,10 @@ DecodeState AsrDecoder::AdvanceDecoding(bool block) { | |||
| std::vector<std::vector<float>> ctc_log_probs; | |||
| model_->ForwardEncoder(chunk_feats, &ctc_log_probs); | |||
| int forward_time = timer.Elapsed(); | |||
| for (int i = 0; i < ctc_log_probs.size(); i++) { | |||
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if (opts_.ctc_wfst_search_opts.blank_scale != 1.0) {
for (int i = 0; i < ctc_log_probs.size(); i++) {
ctc_log_probs[i][0] = ctc_log_probs[i][0]
+ std::log(opts_.ctc_wfst_search_opts.blank_scale);
}
}There was a problem hiding this comment.
@simonwang517 please fix the logic as above to avoid useless computation when blank_scale is 1.0.
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@robin1001 have updated code to avoid useless computation
robin1001
approved these changes
Jan 9, 2023
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blank scale can smooth wfst decoding score