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Support TDNN models from the yesno recipe from icefall (#262)

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This commit is contained in:
Fangjun Kuang
2023-08-12 19:50:22 +08:00
committed by GitHub
parent b094868fb8
commit a4bff28e21
23 changed files with 612 additions and 36 deletions
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18
sherpa-onnx/csrc/offline-recognizer-ctc-impl.h
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@@ -27,6 +27,10 @@ static OfflineRecognitionResult Convert(const OfflineCtcDecoderResult &src,
std::string text;
for (int32_t i = 0; i != src.tokens.size(); ++i) {
if (sym_table.contains("SIL") && src.tokens[i] == sym_table["SIL"]) {
// tdnn models from yesno have a SIL token, we should remove it.
continue;
}
auto sym = sym_table[src.tokens[i]];
text.append(sym);
r.tokens.push_back(std::move(sym));
@@ -46,14 +50,22 @@ class OfflineRecognizerCtcImpl : public OfflineRecognizerImpl {
model_->FeatureNormalizationMethod();
if (config.decoding_method == "greedy_search") {
if (!symbol_table_.contains("<blk>")) {
if (!symbol_table_.contains("<blk>") &&
!symbol_table_.contains("<eps>")) {
SHERPA_ONNX_LOGE(
"We expect that tokens.txt contains "
"the symbol <blk> and its ID.");
"the symbol <blk> or <eps> and its ID.");
exit(-1);
}
int32_t blank_id = symbol_table_["<blk>"];
int32_t blank_id = 0;
if (symbol_table_.contains("<blk>")) {
blank_id = symbol_table_["<blk>"];
} else if (symbol_table_.contains("<eps>")) {
// for tdnn models of the yesno recipe from icefall
blank_id = symbol_table_["<eps>"];
}
decoder_ = std::make_unique<OfflineCtcGreedySearchDecoder>(blank_id);
} else {
SHERPA_ONNX_LOGE("Only greedy_search is supported at present. Given %s",