Product category:
Analogue and Mixed Signal ICs
News Release from: Oki Electric | Subject: ML2272X Series
Edited by the Electronicstalk Editorial
Team on 25 March 2008
Speech-synthesis chips increase vocal
range
The ML2272X Series allows designers to adjust the tone or speed of the voice in voice guidance applications depending on the situation.
Oki Electric has developed a new series of speech-synthesis LSIs that enable users to adjust playback speed and speech tone Whereas in previous speech-synthesis devices the speech tone, or pitch, increased or decreased as the playback speed changed, with these new devices, users can adjust both the speed and tone
This article was originally published on Electronicstalk on 10 Apr 2002 at 8.00am (UK)
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Because the chip is equipped with a 16bit audio-class D/A convertor, it also offers high voice quality compared with previous Oki speech-synthesis LSIs.
Samples of the product are available now, and volume shipment is scheduled to start in June 2008.
"With Oki's ML2272X Series, users can now offer more user-friendly products - such as language learning devices, electronic dictionaries, educational toys and products for the elderly - by integrating voice guidance features into these products", says Masahiko Morioka, President of Silicon Solutions Company at Oki.
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"As a leader in the field of speech-synthesis LSIs, Oki will continue to leverage its total support expertise and proprietary speech technology such as Oki-ADPCM, and technical knowledge it has gained for over 20 years with a focus on voice quality, to provide speech solutions that offer added value".
Speech functions are used in a variety of user-friendly products, such as for voice guidance in high-end white goods, home appliances and alarm systems.
Instead of a buzzer, voice guidance is used to notify users when a certain task has been finished or to alert and warn them in a dangerous situation.
This allows children and elderly to be aware of the situation.
Conventional speech for voice guidance is recorded at a certain predefined tone, which makes it difficult to adapt the playback voice to the situation or environment.
In addition, people hear voice guidance differently depending on their age or the environment and situation they are in at that time (quiet, loud, open space etc).
The ML2272X Series can adjust the tone or speed of the voice in such voice guidance applications depending on the situation.
For example, for emergency situations where urgency is needed, the tone and speech of the voice should be different from situations where calm action is required.
As an additional example, the elderly tend to hear low pitch sounds better, thus in home appliances a high-pitched voice of 4kHz or more can be changed to a slow and low pitch voice for better hearing.
Compared with Oki's previous voice LSI products, the voice quality of ML2272X Series is notably improved.
Also, by including a speaker amplifier, Oki has made it easy for customers to incorporate voice playback functionality in their products.
Moreover, the built-in memory has been increased to a maximum of 16Mbit, making it possible to record and play back an increased number of messages.
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