Audio software can differentiate an in-car cabin

Post processing algorithms, such as tone control, cabin equalisation and chime generation can be implemented in Silicon Labs’ Global Eagle Si47911/12 radio ICs, exploiting the IC’s Tensilica HiFi EP DSP. Automotive radio developers can create new audio software products to implement audio post-processing functions and can use the company’s development tools to port proprietary audio algorithms, design custom audio processing flows using its library of audio functions. Alternatively, they can combine audio algorithms with the company’s audio post-processing functions.

The combination of new audio software products and Global Eagle tuner ICs addresses demand for advanced car radio technology by supporting all worldwide broadcast radio bands and enabling flexible and powerful approaches to audio post-processing.

The fixed-function audio software provides audio post-processing for all analogue 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 three independent audio post-processing paths, four- and six-channel audio in the main cabin, auxiliary two-channel audio (for rear seat headphones) and audio processing for two microphone inputs. There is also two-tone sequence generators and two wave generators played from internal memory.

An audio software development kit (SDK) enables developers to port audio algorithms to the Global Eagle Si47911/12 audio system and unlock the capabilities of the audio DSP. The SDK includes development board with software tools for real-time debugging, a library of building blocks that can be used by the developer’s algorithms and an encryption utility that secures the audio processing IP.

The company also offers Silicon Labs Audio Topology Editor (SLATE), a graphical editor running in MathWorks’ Simulink environment. It enables developers to design a custom audio processing flow using the company’s library of software modules. The editor also enables developers to reuse and modify the audio design used in the fixed-function audio processing.

Together, SLATE and the audio SDK can be used to combine a developer’s own algorithms with Silicon Labs’ audio processing blocks to create new audio processing topologies. The SDK enables developers to port their IP to the audio DSP and format the new IP as a SLATE module, which can then be manipulated in SLATE.

The audio software products for the Global Eagle Si47911/12 tuner IC family are available now through a software licensing agreement.

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