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arXiv 2107.05907cs.SDcs.CLeess.AS
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基于一致性的旋转位置嵌入端到端语音识别

Conformer-based End-to-end Speech Recognition With Rotary Position Embedding

Northwestern Polytechnical University(西北工业大学)

Shengqiang Li, Menglong Xu, Xiao-Lei Zhang

摘要:

近年来,基于transformer的端到端语音识别模型由于其高训练速度和对长距离全局上下文建模的能力而受到相当大的关注。Transformer架构中的位置嵌入是必不可少的,因为它为输入序列中不同位置的元素之间的依赖性建模提供了监督。为了利用输入序列的时间顺序,许多作品将元素的相对或绝对位置信息注入到输入序列中。在这项工作中,我们研究了各种位置嵌入方法的卷积增强的Transformer(conformer),并采用了一种新的实现称为旋转位置嵌入(RoPE)。RoPE通过旋转矩阵将绝对位置信息编码到输入序列中,然后自然地将显式相对位置信息并入自注意模块中。为了评估RoPE方法的有效性,我们在AISHELL-1和LibriSpeech语料库上进行了实验。实验结果表明,在语音识别任务中,用RoPE增强的构象子取得了较好的性能.具体来说,我们的模型实现了一个相对字的出错率减少8.70%和7.27%,分别在测试清洁和测试其他集的LibriSpeech语料库的一致。

英文摘要:

Transformer-based end-to-end speech recognition models have received considerable attention in recent years due to their high training speed and ability to model a long-range global context. Position embedding in the transformer architecture is indispensable because it provides supervision for dependency modeling between elements at different positions in the input sequence. To make use of the time order of the input sequence, many works inject some information about the relative or absolute position of the element into the input sequence. In this work, we investigate various position embedding methods in the convolution-augmented transformer (conformer) and adopt a novel implementation named rotary position embedding (RoPE). RoPE encodes absolute positional information into the input sequence by a rotation matrix, and then naturally incorporates explicit relative position information into a self-attention module. To evaluate the effectiveness of the RoPE method, we conducted experiments on AISHELL-1 and LibriSpeech corpora. Results show that the conformer enhanced with RoPE achieves superior performance in the speech recognition task. Specifically, our model achieves a relative word error rate reduction of 8.70% and 7.27% over the conformer on test-clean and test-other sets of the LibriSpeech corpus respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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