Encoder / Decoder / Voice Database

Encoder / Decoder / Voice Database

NTT Group has contributed to the communication industry with world-leading technology. NTT-AT has inherited those technologies and provides the convertors for many types of transcode in order to transmit and distribute audio and images to various terminals such as PCs, TVs, Smart phones, 4KTVs, etc., and the database specialized for evaluation of transmitted audio data. In addition, by leveling many years of accumulated technologies and know-how for audio recording and transmission, NTT-AT provides communication products while pursuing ease of use and comfort of users, such as an easy-to-hear and easy-to-talk audio conference system, R-talk, and a microphone that can record clear voices even in a 100dB noise environment, an Intelligent Microphone, as well as an information distribution system POPITA that uses invisible two dimensional codes without degradation of images and videos.

Super Wideband StereoSpeech Database

With the rapid progress in IP telephony or mobile phone technology, the standardization work to transmit speech signal with the same frequency bandwidth (14 kHz) and format (Stereo) as music signal is achieved in ITU-T or 3GPP/ETSI. To answer the requests to speech samples to be applicable to the performance tests for such purpose, we released new multi-lingual speech database to public.

Restricted Languages Multilingual Speech Database 2002

How is this product different from our "Multilingual Speech Database 1994"?

Multilingual Speech Database(World City Names)

Suitable speech materials for the research on language identification and performance evaluation for speech recognition terminals.

Multi-Lingual Speech Database for Telephonometry 1994

NTT Advanced Technology Corporation(NTT-AT) had supplied the multi-lingual speech database for telephonometry 1988 for three years from 1989 to 1991.

Japanese Words Database

Training acoustic model and performance evaluation for speech recognition systems

Japanese Short Sentence Speech Database

This product has been developed to meet the needs of our overseas clients who wish to test the capabilities of their Japanese-language speech codec algorithms or telecommunication speech terminals. Samples in this database have been used in subjective standardization tests for the ITU-T 16 kbit/s wideband codec and 4kbit/s speech codec algorithms. Merging the database files enables users to make speech samples comprising sentence pairs and time structure as given in ITU-T Recommendation P.800 and the subjective test plan of 3GPP.

Artificial Voices CD-ROM

Artificial Voices was distributed by our company, along with the old version of the multi-lingual speech database for telephonometry, from 1989 until the service was terminated.

Ambient Noise Database CD-ROM

This database has been developed for evaluation on the performance of telephone sets, public address systems, and speech input terminals with significant ambient noise.

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