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Maeda E.,NTT Communication Science Laboratories
NTT Technical Review | Year: 2013

Research at NTT Communication Science Laboratories draws on both information science and human science with the aim of building a new technical infrastructure that will connect humans and information. These Feature Articles introduce new trends in the fields of speech, language, and hearing, which have a relatively long history of basic research.

Imoto K.,NTT Media Intelligence Laboratories | Ohishi Y.,NTT Communication Science Laboratories | Uematsu H.,NTT Media Intelligence Laboratories | Ohmuro H.,NTT Media Intelligence Laboratories
IEEE International Workshop on Machine Learning for Signal Processing, MLSP | Year: 2013

We propose a model for analyzing acoustic scenes by using long-term (more than several seconds) acoustic signals based on a probabilistic generative model of an acoustic feature sequence associated with acoustic scenes (e.g. 'cooking') and acoustic events (e.g. 'cutting with a knife,' 'heating a skillet' or 'running water') called latent acoustic topic and event allocation (LATEA) model. The proposed model allows the analysis of a wide variety of sounds and the capture of abstract acoustic scenes by representing acoustic events and scenes as latent variables, and can also describe the acoustic similarity and variance between acoustic events by representing acoustic features as a mixture of Gaussian components. Experiments with real-life sounds indicated that the proposed model exhibited lower perplexity than conventional models; it improved the stability of acoustic scene estimation. The experimental results also suggested that the proposed model can better describe the acoustic similarity and variance between acoustic events than conventional models. © 2013 IEEE.

Nagata M.,NTT Communication Science Laboratories | Sudoh K.,NTT Communication Science Laboratories | Suzuki J.,NTT Communication Science Laboratories | Akiba Y.,Communication Intelligence | And 2 more authors.
NTT Technical Review | Year: 2013

English and Japanese have very different word orders, and they are probably one of the most difficult language pairs to translate. We developed a new method of translating English to Japanese that takes advantage of the head-final linguistic nature of Japanese. It first changes the word order in an English sentence into that of a Japanese sentence and then translates the reordered English sentence into Japanese. We found that our method dramatically improved the accuracy of English-to-Japanese translation. We also found that the method is highly effective for Chinese-to-Japanese translation.

Ogasawara T.,Device Innovation Center | Ono K.,Device Innovation Center | Matsuura N.,Device Innovation Center | Yamaguchi M.,Tech Lab Group | And 2 more authors.
NTT Technical Review | Year: 2015

NTT has developed a conductive fabric called hitoe that enables continuous measurement of the biological signals of the person wearing it. Heartbeat variations and electrocardiogram signals detected through hitoe are transmitted wirelessly by a compact dedicated device to a smartphone or tablet, where they can be readily checked using an application. Such technology is expected to lead to the creation of new services in fields such as sports training, health enhancement, security and safety, medical care support, and entertainment. In this article, we introduce some examples of approaches to application development.

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