MT9125 Description
The Dual-channel ADPCM transcoder is a low power, CMOS device capable of two encoder functions and two decoder functions. Two 64 kbit/s PCM channels are pressed into two 32 kbit/s ADPCM channels, and two 32 kbit/s ADPCM channels are expanded into two 64 kbit/s PCM channels. The 32 kbit/s ADPCM transcoding algorithm utilized conforms to CCITT Remendation G.721 and ANSI T1.303-1989.
MT9125 Key Features
- Dual channel full duplex transcoder
- 32 kbit/s and 24 kbit/s ADPCM coding
- patible to G.721 & and G.723 (1988) and
- Low power operation, total 25mW typical
- Asynchronous 4.096 MHz master clock
- Transparent ADPCM bypass capability
- Serial interface for both PCM and ADPCM data
- ST-BUS interface supported
- Pin selected µ-law or A-law operation
- Pin selected CCITT or sign-magnitude PCM