9 research outputs found
Visual Speech Enhancement
When video is shot in noisy environment, the voice of a speaker seen in the
video can be enhanced using the visible mouth movements, reducing background
noise. While most existing methods use audio-only inputs, improved performance
is obtained with our visual speech enhancement, based on an audio-visual neural
network. We include in the training data videos to which we added the voice of
the target speaker as background noise. Since the audio input is not sufficient
to separate the voice of a speaker from his own voice, the trained model better
exploits the visual input and generalizes well to different noise types. The
proposed model outperforms prior audio visual methods on two public lipreading
datasets. It is also the first to be demonstrated on a dataset not designed for
lipreading, such as the weekly addresses of Barack Obama.Comment: Accepted to Interspeech 2018. Supplementary video:
https://www.youtube.com/watch?v=nyYarDGpcY
Seeing Through Noise: Visually Driven Speaker Separation and Enhancement
Isolating the voice of a specific person while filtering out other voices or
background noises is challenging when video is shot in noisy environments. We
propose audio-visual methods to isolate the voice of a single speaker and
eliminate unrelated sounds. First, face motions captured in the video are used
to estimate the speaker's voice, by passing the silent video frames through a
video-to-speech neural network-based model. Then the speech predictions are
applied as a filter on the noisy input audio. This approach avoids using
mixtures of sounds in the learning process, as the number of such possible
mixtures is huge, and would inevitably bias the trained model. We evaluate our
method on two audio-visual datasets, GRID and TCD-TIMIT, and show that our
method attains significant SDR and PESQ improvements over the raw
video-to-speech predictions, and a well-known audio-only method.Comment: Supplementary video: https://www.youtube.com/watch?v=qmsyj7vAzo