What is sought after by Epson is total speech solution that is simple and handy. It does not require recordings at a studio. It is capable of generating high-quality natural sounding voice under high compression data.
These are leading players of secure, safe, and convenient life produced by Epson.
Feature 1. No need for studio recording
Using Epson speech & audio LSIs for your products featuring voice guidance functions means there's no need to arrange recording studios or hire professional voice performers. This allows you to significantly reduce the product development costs and time to market. The TTS tool available from Epson makes it easy to create or modify your speech phrases. Japanese, English, and Korean language versions are now available.
| bitrate | EPSON (16kHz) |
ADPCM (16kHz) |
ADPCM (8kHz) |
|---|---|---|---|
| 1MB | approx 8min | approx 2min | approx 4min |
| 2MB | approx 16min | approx 4min | approx 8min |
| 4MB | approx 33min | approx 8min | approx 16min |
| 8MB | approx 1hour 6min | approx 16min | approx 33min |
| 16MB | approx 2hour 13min | approx 33min | approx 1hour 6min |
Epson's highly efficient encoding format allows for longer phrases with excellent sound quality. The integrated high-quality 16-bit DAC produces a "silky voice" that can be coupled with high quality sound effects.
Epson's voice guidance LSIs use a message protocol based on asynchronous serial interface. This means they are easily integrated into a wide range of host devices and microcontrollers, reducing development time and costs, and helping achieve faster time to market.
The combination of the All in One PC tool "Silky Voice" generator, and use of external SPI-Flash with the S1V3G340 makes it easy to create, write and evaluate voice data. The created voice ROM data can be written to SPI-Flash from a Host CPU via the S1V3G340. The use of high-quality audio and a high-compression format also enables the loading of large voice data capacity.
"Silky Voice" Creation tool Voice Sample
Here are some sample voices for Epson's audio and speech LSIs created by our PC-based TTS tool. Click the following links to experience studio-quality voices with high quality sound effects.
| Series name | S1V3G340 | S1V30080 |
|---|---|---|
| Status | MP | MP |
| Download |  |
|
| Power supply | 5.5v-2.2 single | |
| Clock | 32.768kHz or 12.288MHz | 8.192MHz(fs:8kHz) 16.384MHz(fs:16kHz) |
| Host interface | SPI/UART/I2C (Command control) |
SPI/I2C (Command Control) standalone mode |
| Sampling frequency | 16kHz | 4,8,12,16kHz |
| Sound Decode Format | Epson Original Format | |
| Bit rate | 16/24/32/40kbps | 8bit/10bit mode |
| Melody Synthesizer | - | Supports 5ch,5 Octaves |
| Sound Phrase Combination Function | No limitaion on combination | |
| Setting of DelayBetween Phrases | 0 ms, 20-2047 ms (1 ms step) | 0ms-1000ms (10 ms step) |
| Sound Data Streaming Regeneraiotion | Supported by the command control through the host interface | Melody data streaming supported |
| Integrated ROM Size (Time) | ROMless | Approx.30 sec (fs.8kHz) Approx.15 sec (fs.16kHz) |
| DAC | Highly accurate 16-bit DAC | 10-bit DAC |
| Package | QFP13-52pin (10mm □, 0.65mm pitch) QFP12-48(7mm□, 0.5mm pitch) QFN7-48(7mm□, 0.5mm pitch) |
QFP13-52 (10mm□,0.65mm pitch) QFP12-48 (7mm□,0.5mm pitch) |
| Languages supported by TTS tool | TTS Tool Support Language Asia: Chinese, Japanese, Korean Americas: American English, American Spanish, Canadian French Europe: British English, French, German, Italian, Russian, Spanish （No language restricitons when used for studio recording) |
|
| Evaluation Board | Supported | |
| Sample Code(For the Host) | Supported | |
*1: Estimate when used at 16 kbps
S1V3G340 Evaluation Board