CMX7261 Description
The CMX7261 Multi-transcoder IC is a device supporting multiple speech codecs in a single chip. When loaded with FI-2.x the CMX7261 is capable of encoding analogue voice into PCM (linear, µ-law or A-law) or G.723.1 data formats at either 5.3kbps or 6.3kbps. It is capable of decoding PCM or G.723.1 (both rates) back to analogue voice.
CMX7261 Key Features
- Half-duplex operation
- Full-duplex operation
- Codec support: o G.723.1 codec (5.3kbps / 6.3kbps rates) with Annex A o PCM (linear, µ-law, A-law)
- Transcoding support: o PCM to G.723.1 and reverse o PCM μ/A/linear to PCM μ/A/linear transcoder
- No external DSP or codecs required: simply upload Function Image™ (FI)
- Transcoder routing: o Choice of input sources
- C-BUS transfer to host, external PCM device/codec, analogue audio input o Choice of output sources
- C-BUS transfer to host, external PCM device/codec, analogue audio output
- C-BUS host serial interface o SPI-like with register addressing o Read/Write 128-word FIFOs and data buffers to streamli
- Auxiliary functions o Three GPIOs o Analogue input/output gain adjustment o Analogue input multiplexer o Analogue output