Specifications

PF1265-01

G729, G723.1 real time codec middleware

● G72x real time codec middleware for the S1C33 Family

● Real-time execution in an S1C33 chip

● Voice compression technologies G729, G723.1 supported

■ FEATURES

• G72x real time codec middleware for the S1C33 Family is provided in the form of a linkable library.

• Uses voice compression technologies G729 Annex-A and G723.1 Annex-A (decompression only) to com-

press and decompress voice data. The following compression rates are supported (based on 8-kHz sam-

pling):

G729 .......... 8kbps

G723.1 ....... 6.3kbps/5.3kbps

• 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 External RAM ROM

G729 compression/decompression: 7.5K 4.7K 38.4K

G729 decompression only: 7.5K 3.0K 20.0K

G723.1 decompression only: 7.3K 2.5K 33.0K

● Speed (CPU occupancy)

G729 compression (50MHz):

97%

(measurement results when ROM and RAM are accessed with no wait states)

G729 decompression (40MHz): 75%

G723.1 decompression (40MHz): 40%

S1C33 Family S5U1C330G3S Middleware