Speech-to-speech translation using deep learning

Current state-of-the-art translation systems for speech-to-speech rely heavily on a text representation for the translation. By transcoding speech to text we lose important information about the characteristics of the voice such as the emotion, pitch and accent. This thesis examine the possibility of using an LSTM neural network model to translate speech-to-speech without the need of a text representation. That is by translating using the raw audio data directly in order to persevere the characteristics of the voice that otherwise get lost in the text transcoding part of the translation process. As part of this research we create a data set of phrases suitable for speech-to-speech translation tasks. The thesis result in a proof of concept system which need to scale the underlying deep neural network in order to work better