Weakly Supervised Training of Speaker Identification Models

06/22/2018

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by   Martin Karu, et al.

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Tallinn University of Technology

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We propose an approach for training speaker identification models in a weakly supervised manner. We concentrate on the setting where the training data consists of a set of audio recordings and the speaker annotation is provided only at the recording level. The method uses speaker diarization to find unique speakers in each recording, and i-vectors to project the speech of each speaker to a fixed-dimensional vector. A neural network is then trained to map i-vectors to speakers, using a special objective function that allows to optimize the model using recording-level speaker labels. We report experiments on two different real-world datasets. On the VoxCeleb dataset, the method provides 94.6 the baseline performance by a large margin. On an Estonian broadcast news dataset, the method provides 66 93