Statistical Machine Translation
We have been developing the statistical machine translation system for speech to speech translation. We focus our research on text-to-text translation task now, but we will include speech-to-speech translation among our research topics soon. We have an interest in building a translation model, decoding a word graph and combining statistical machine translation system and speech recognizer.- Statistical Machine Translation
- Input : SMT system gets a foreign sentence as a input.
- Output : SMT system generates a native sentence which is a translation of the input
- Language Model is a model that provides the probability of an arbitarary word sequence.
- Translation Model is a model that provides the probabilities of possible translation pairs.
- Decoding Algorithm is a graph search algorithm that provides best path on a word graph.
- Decoding process
- A Decoder is a core component of the SMT systzm. The decoder gets possible partial translations from the translation model, then selects an re-arranges them to make the best translation.
- Initialize : create small partial model for caching an pre-calculate future cost.
- Hypothesis is a partial translation which generated by applying a series of tranlation options.
- Decoding process is iterations of two taks: choosing a hypothesis and exapnding the hypothesis. The process terminates if there is no remainig hypothesis to expand.
- Speech to Speech Machine Translation
- Speech to Speech Machine Translation can be achieved by cascading three independent components: ASR, SMT system and TTS system.
- That is, an output of ASR be an input for the SMT system and an output an output of the SMT system be an input for the TTS systm.
- We use cascading approach now, but we have an interest in joint model which combines ASR and SMT decoder.
- Demo Video
- You can download and play the demo video of POSSMT/KE (POStech Statistical Machine Translation) from here
- You can download and play the demo video of POSSMT/KJ (POStech Statistical Machine Translation) from here
- You can download and play the demo video of POSSLT (POStech Spoken Language Translation) from here
