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From ASICs to SOCs: A Practical Approach by Faranak Nekoogar, Farzad Nekoogar

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1.2. Voice Over IP SOC

A gateway VoIP SOC is a device used for functions such as vocoders, echo cancellation, data/fax modems, and VoIP protocols. Currently, there are a number of these devices available from several vendors; typically these devices differ from each other by the type of functions and voice-processing algorithms they support.

In this example, we define the major blocks required to support carrier-class voice processing. The SOC can vary depending on the particular I/O and voice-processing requirements of the mediation gateway architecture. Major units for this SOC are as follows.

Host/PCI

The host interface is for control, code download, monitoring, and in some cases data transport. This host interface could be either a microprocessor-specific ...

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