Specifications

61
PF968-05
Voice compression and decompression middleware
● Voice compression and decompression middleware
for the S1C33 Family
● Voice compression, decompression, and speed and
pitch change supported
● Real-time execution in an S1C33 chip
■ FEATURES
• Voice middleware for the S1C33 Family is provided in the form of a linkable library in a CD-ROM.
• Compression, decompression, a speaking part with D/A (PWM) and a listening part with A/D are included in
the library.
•Seiko Epson exclusive voice compression technologies VOX and VSX provide voice compression and de-
compression with a high compression ratio. (In the case of VOX, an 8MHz sampled voice can be compressed
to 8kbps standard to max 2kbps and various compression ratios can be selected.)
• With voice processing technology VSC, the voice speed can be changed from x2 to x1/4, and the voice pitch
can be changed from x2 (high) to x1/3 (low).
•Supports PCM and ADPCM (40kbps, 32kbps, 24kbps, 16kbps).
• Suitable for voice memos, data banks with voice, PDA with voice, digital stationery with voice and digital toys
with voice.
■ HARDWARE CONFIGURATION
S1C33xxx
S1C33000
Core CPU
16-bit programmable
timer
Internal RAM
External RAM External ROM
Bus interface
10-bit A/D converter
8-bit D/A converter
or PWM using 16-bit
programmable timer
MIC
AMP
Mic
Speaker
POWER
AMP
■ MEMORY REQUIREMENTS AND SPEED
● Memory Requirements (byte)
__________________
Internal RAM (0 wait)
_____
ROM
VSX: 5.3K 17K
ADPCM: 4.5K 16K
VOX: 5.8K 13K
● Speed (CPU occupancy during 20MHz operation)
________
Playback
_________
Recording
VSX: 26% 55%
ADPCM: 50% 63%
VOX: 22% 85%
S1C33 Family S5U1C330V1S Middleware