# WavLM

## Overview

The WavLM model was proposed in [WavLM: Large-Scale Self-Supervised Pre-Training for Full Stack Speech Processing](https://arxiv.org/abs/2110.13900) by Sanyuan Chen, Chengyi Wang, Zhengyang Chen, Yu Wu, Shujie Liu, Zhuo Chen,

Jinyu Li, Naoyuki Kanda, Takuya Yoshioka, Xiong Xiao, Jian Wu, Long Zhou, Shuo Ren, Yanmin Qian, Yao Qian, Jian Wu,

Michael Zeng, Furu Wei.

The abstract from the paper is the following:

*Self-supervised learning (SSL) achieves great success in speech recognition, while limited exploration has been

attempted for other speech processing tasks. As speech signal contains multi-faceted information including speaker

identity, paralinguistics, spoken content, etc., learning universal representations for all speech tasks is

challenging. In this paper, we propose a new pre-trained model, WavLM, to solve full-stack downstream speech tasks.

WavLM is built based on the HuBERT framework, with an emphasis on both spoken content modeling and speaker identity

preservation. We first equip the Transformer structure with gated relative position bias to improve its capability on

recognition tasks. For better speaker discrimination, we propose an utterance mixing training strategy, where

additional overlapped utterances are created unsupervisely and incorporated during model training. Lastly, we scale up

the training dataset from 60k hours to 94k hours. WavLM Large achieves state-of-the-art performance on the SUPERB

benchmark, and brings significant improvements for various speech processing tasks on their representative benchmarks.*

Relevant checkpoints can be found under https://huggingface.co/models?other=wavlm.

This model was contributed by [patrickvonplaten](https://huggingface.co/patrickvonplaten). The Authors' code can be

found [here](https://github.com/microsoft/unilm/tree/master/wavlm).

## Usage tips

- WavLM is a speech model that accepts a float array corresponding to the raw waveform of the speech signal. Please use

  [`Wav2Vec2Processor`] for the feature extraction.

- WavLM model can be fine-tuned using connectionist temporal classification (CTC) so the model output has to be decoded

  using [`Wav2Vec2CTCTokenizer`].

- WavLM performs especially well on speaker verification, speaker identification, and speaker diarization tasks.

## Resources

- [Audio classification task guide](../tasks/audio_classification)

- [Automatic speech recognition task guide](../tasks/asr)

## WavLMConfig

[[autodoc]] WavLMConfig

## WavLMModel

[[autodoc]] WavLMModel

    - forward

## WavLMForCTC

[[autodoc]] WavLMForCTC

    - forward

## WavLMForSequenceClassification

[[autodoc]] WavLMForSequenceClassification

    - forward

## WavLMForAudioFrameClassification

[[autodoc]] WavLMForAudioFrameClassification

    - forward

## WavLMForXVector

[[autodoc]] WavLMForXVector

    - forward