kws

1. prepare data

prepare the video and audio data and extract feature for training procedure

1.1 create data dir to contain misp audio and video feature data

mkdir -p examples/misp/kws/xtxt/data

1.2 prepare audio feature dir for audio model; we assume that all the audio have been in the feature format.

# the dir contains feats.scp and labels.scp
mkdir -p examples/misp/kws/xtxt/train
mkdir -p examples/misp/kws/xtxt/dev

1.3 prepare audio+video feature dir for audio-video model

# the dir contains feats.scp , labels.scp and video.scp
mkdir -p examples/misp/kws/xtxt/train_av
mkdir -p examples/misp/kws/xtxt/dev_av

2. train model

4 kinds of models are offered now:

• conformer/transformer using only audio or video data
• fine tune model for conformer/transformer using focal-loss and label_smoothing
• audio-visual transformer model using both audio and video data by 2 kinds of fusion operation
• Majority Vote by all models

2.1 train audio transformer/conformer

1. run the following commands to start training audio transformer/conformer

python athena_wakeup/main.py examples/misp/kws/xtxt/configs/kws_audio_conformer.json
python athena_wakeup/main.py examples/misp/kws/xtxt/configs/kws_audio_transformer.json

2. if you have multiple GPUs , you can train models parallel using the following commands

python athena_wakeup/horovod_main.py examples/misp/kws/xtxt/configs/kws_audio_conformer.json
python athena_wakeup/horovod_main.py examples/misp/kws/xtxt/configs/kws_audio_transformer.json

3. the model will be stored in examples/misp/kws/xtxt/ckpts/kws_audio_conformer and examples/misp/kws/xtxt/ckpts/kws_audio_transformer

2.2 fine-tune audio transformer using focal-loss

1. focal-loss wii be used to fine tune model to get improvements

python athena_wakeup/main.py examples/misp/kws/xtxt/configs/kws_audio_transformer_finuetune_ft.json

2.3 train audio-video transformer

1. train model using multi-moda data and the model will be stored in examples/misp/kws/xtxt/ckpts/kws_av_transformer

python athena_wakeup/main.py examples/misp/kws/xtxt/configs/kws_av_transformer.json

3. test model

3.1 test audio transformer/conformer

1. test the trained model and the FRR and FAR will be shown

python athena_wakeup/test_main.py examples/misp/kws/xtxt/configs/kws_audio_conformer.json
python athena_wakeup/test_main.py examples/misp/kws/xtxt/configs/kws_audio_transformer.json

3.2 test audio-video transformer

1. test the trained model

python athena_wakeup/test_main_av.py examples/misp/kws/xtxt/configs/kws_av_transformer.json

4. model vote

1. As you have got audio transformer and audio-video transformer, you can use mode vote to get better results

5. About MISP Challenge 2021

5.1 MISP Challenge 2021 webset:https://mispchallenge.github.io/index.html

5.2 Our final score is 0.091 and ranked 3rd among all the 17 teams

5.3 the Paper "AUDIO-VISUAL WAKE WORD SPOTTING SYSTEM FOR MISP CHALLENGE 2021" have been accepted by ICASSP 2022