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Code Issues Releases Wiki Activity

[micro_wake_word] add new VPE features (#8655)

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This commit is contained in:
Kevin Ahrendt
2025-04-30 19:22:48 -05:00
committed by GitHub
parent 6de6a0c82c
commit cdc77506de
9 changed files with 788 additions and 503 deletions
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19
esphome/components/micro_wake_word/preprocessor_settings.h
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@@ -7,6 +7,10 @@
namespace esphome {
namespace micro_wake_word {
// Settings for controlling the spectrogram feature generation by the preprocessor.
// These must match the settings used when training a particular model.
// All microWakeWord models have been trained with these specific paramters.
// The number of features the audio preprocessor generates per slice
static const uint8_t PREPROCESSOR_FEATURE_SIZE = 40;
// Duration of each slice used as input into the preprocessor
@@ -14,6 +18,21 @@ static const uint8_t FEATURE_DURATION_MS = 30;
// Audio sample frequency in hertz
static const uint16_t AUDIO_SAMPLE_FREQUENCY = 16000;
static const float FILTERBANK_LOWER_BAND_LIMIT = 125.0;
static const float FILTERBANK_UPPER_BAND_LIMIT = 7500.0;
static const uint8_t NOISE_REDUCTION_SMOOTHING_BITS = 10;
static const float NOISE_REDUCTION_EVEN_SMOOTHING = 0.025;
static const float NOISE_REDUCTION_ODD_SMOOTHING = 0.06;
static const float NOISE_REDUCTION_MIN_SIGNAL_REMAINING = 0.05;
static const bool PCAN_GAIN_CONTROL_ENABLE_PCAN = true;
static const float PCAN_GAIN_CONTROL_STRENGTH = 0.95;
static const float PCAN_GAIN_CONTROL_OFFSET = 80.0;
static const uint8_t PCAN_GAIN_CONTROL_GAIN_BITS = 21;
static const bool LOG_SCALE_ENABLE_LOG = true;
static const uint8_t LOG_SCALE_SCALE_SHIFT = 6;
} // namespace micro_wake_word
} // namespace esphome