Codec (coder-decoder)
CML Microcircuits

As a member of the CML DuraTALK® family of digital voice products, the CMX7261 Multi-transcoder IC is a device supporting multiple speech codecs in a single chip. The CMX7261 acts as an audio codec capable of encoding analogue voice into linear µ-law or A-law PCM, CVSD or G.729A data formats.
It is capable of decoding PCM, CVSD and G.729A back to analogue voice. It can also transcode data between PCM, CVSD and G.729A.

Input and output signals may be passed through the C-BUS interface, the PCM port or the on-chip convertors (ADC/DAC).

The device utilises CML's proprietary FirmASIC® component technology. On-chip sub-systems of this voice transcoder IC are configured by a Function Image™ data file that is uploaded during device initialisation and that defines the device's function and feature set.
The Function Image™ can be loaded automatically from a host µC over the C-BUS serial interface or from an external memory device.

The device's functions and features can be enhanced by subsequent Function Image™ releases, facilitating in-the-field upgrades.