Software IP presents full automotive audio function set

December 06, 2016 // By Graham Prophet
Silicon Labs has audio software products that give automotive radio developers greater flexibility to incorporate advanced audio post-processing algorithms in Silicon Labs’ Global Eagle Si47911/12 radio ICs with audio system devices.

The software simplifies developers’s task to implement audio post-processing functions such as tone control, cabin equalization and chime generation using the Si47911/12 ICs’ integrated Tensilica HiFi EP DSP. Developers can use Silicon Labs’ development tools to port their proprietary audio algorithms, design custom audio processing flows using Silicon Labs’ library of audio functions, or combine their audio algorithms with Silicon Labs’ audio post-processing functions.

Automotive radios can support FM phase diversity reception, Radio Data System (RDS), and digital radio standards such as HD Radio and Digital Audio Broadcast (DAB). The combination of Silicon Labs’ new audio software products and Global Eagle tuner ICs is intended to address the global demand for advanced car radio technology by supporting all worldwide broadcast radio bands while enabling flexible and powerful approaches to audio post-processing.

Silicon Labs’ fixed-function audio software provides a complete audio post-processing solution for all analog and digital audio functions in the automotive radio head unit. The audio software includes an extensive set of user-programmable parameters that enable developers to configure the audio post-processing algorithms for different car models. The software supports the following features:

• Three independent audio post-processing paths:

  • Main cabin: 4-channel or 6-channel audio
  • Auxiliary: 2-channel audio (for rear seat headphones)
  • Voice: audio processing for two microphone inputs

• Two tone sequence generators

• Two wave generators played from internal memory