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rhubarb-lip-sync
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Using -dither to prevent recognition errors in connection with zero silence

This commit is contained in:
Daniel Wolf 2016-02-01 20:26:14 +01:00
parent 0cb0153874
commit 75872fe45d
1 changed files with 2 additions and 8 deletions
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10
src/phoneExtraction.cpp
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@ -52,6 +52,8 @@ lambda_unique_ptr<cmd_ln_t> createConfig(path sphinxModelDirectory) {
"-lm", (sphinxModelDirectory / "en-us.lm.bin").string().c_str(), "-lm", (sphinxModelDirectory / "en-us.lm.bin").string().c_str(),
// Set pronounciation dictionary // Set pronounciation dictionary
"-dict", (sphinxModelDirectory / "cmudict-en-us.dict").string().c_str(), "-dict", (sphinxModelDirectory / "cmudict-en-us.dict").string().c_str(),
// Add noise against zero silence (see http://cmusphinx.sourceforge.net/wiki/faq#qwhy_my_accuracy_is_poor)
"-dither", "yes",
// Allow for long pauses in speech // Allow for long pauses in speech
"-vad_prespeech", "3000", "-vad_prespeech", "3000",
"-vad_postspeech", "3000", "-vad_postspeech", "3000",
@ -87,19 +89,11 @@ void processAudioStream(AudioStream& audioStream16kHzMono, function<void(const v
do { do {
// Read to buffer // Read to buffer
buffer.clear(); buffer.clear();
int16_t lastSample = INT16_MIN;
while (buffer.size() < capacity) { while (buffer.size() < capacity) {
// Read sample // Read sample
float floatSample; float floatSample;
if (!audioStream16kHzMono.getNextSample(floatSample)) break; if (!audioStream16kHzMono.getNextSample(floatSample)) break;
int16_t sample = floatSampleToInt16(floatSample); int16_t sample = floatSampleToInt16(floatSample);
// Remove zero silence (see http://cmusphinx.sourceforge.net/wiki/faq#qwhy_my_accuracy_is_poor)
if (sample == lastSample) {
sample += (sample < INT16_MAX) ? 1 : -1;
}
lastSample = sample;
buffer.push_back(sample); buffer.push_back(sample);
} }