51 lines
1.7 KiB
Protocol Buffer
51 lines
1.7 KiB
Protocol Buffer
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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syntax = "proto2";
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package mediapipe;
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import "mediapipe/framework/calculator.proto";
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message MelSpectrumCalculatorOptions {
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extend CalculatorOptions {
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optional MelSpectrumCalculatorOptions ext = 78581812;
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}
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// The fields are to populate the config parameters in
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// audio/dsp/mfcc/mel_filterbank.h
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// but the names are chose to mirror
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// audio/hearing/filterbanks/cochlea_gammatone_filterbank.proto
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// and the default values match those in
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// speech/greco3/frontend/filter_bank.proto .
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// Total number of frequency bands to use.
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optional int32 channel_count = 1 [default = 20];
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// Lower edge of lowest triangular Mel band.
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optional float min_frequency_hertz = 2 [default = 125.0];
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// Upper edge of highest triangular Mel band.
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optional float max_frequency_hertz = 3 [default = 3800.0];
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}
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message MfccCalculatorOptions {
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extend CalculatorOptions {
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optional MfccCalculatorOptions ext = 78450441;
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}
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// Specification of the underlying mel filterbank.
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optional MelSpectrumCalculatorOptions mel_spectrum_params = 1;
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// How many MFCC coefficients to emit.
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optional uint32 mfcc_count = 2 [default = 13];
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}
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