Speech Synthesis Middleware: ToSpeak™
Provides far more realistic speaking voice than the current closed-loop training (CLT) technology with about the same amount of memory.
- ToSpeak™ uses a new Toshiba-proprietary technology to reduce sound-quality variations. This technology selects plural speech units and fuses them together to make the synthesized voice sound more realistic and natural.
- The memory-resident version of ToSpeak™ consumes only as much memory as the current CLT technology (approx. 2 MB) to implement a speech corpus.

Comparisons of Sound Quality and Memory Requirement between the Conventional and New Speech Synthesis Technologies
General Specifications
- Input data: Phonetic transcriptions or plain text
- Output data: PCM digital audio
The sampling frequency is selectable from 22 kHz, 16 kHz, 8 kHz and so on. - Memory requirement: A few Mbytes (Ask Toshiba because it depends on the system organization.)
- Supported languages: Japanese, American and British English, American Spanish, Canadian French, Mandarin Chinese, etc.
- Supported processor: ARM9 (Ask Toshiba for other processors.)
Product Introduction
Two versions of the speech synthesis middleware are available according to application requirements.

- Features of the SYN middleware
-
- Takes a string of phonetic symbols as input and adds natural prosody and intonation
- Eliminates the need for linguistic analysis and thus saves memory.

- Features of the TTS Middleware
-
- Accepts plain text as input and converts it into speech.
- Supports phonetic transcriptions as input.

Benefits of Using Speech Synthesis
Click this image to hear a sample voice.
Route guidance of a car navigation system
ToSpeak™ enables route guidance including a huge number of proper nouns with a natural-sounding voice. ToSpeak™ can be upgraded through simple maintenance of a phonetics database; it is unnecessary to record utterances spoken by professional narrators.
Drive assist
Draws a driver's attention with voice warnings.
Hands-free phone calls
You know who is calling without taking your eyes off the road.
Reading out the delivered information
You can make ToSpeak™ read out content delivered from information service providers.
Reading out emails
Why not add voice messages to make your emails friendlier?
* Bluetooth® is owned by Bluetooth SIG, Inc. and licensed to Toshiba Corporation.
* System and product names mentioned herein may be trademarks or registered trademarks of respective companies or organizations.





