Wolfson Microelectronics has announced the second product in its new highly integrated, ultra-low-power audio center codec (CODEC) family, which is based on the WM8994 for smartphones and other versatile portable audio applications. The WM8994 adds an innovative new HexCoreTM digital baseband interface that takes the highly flexible signal routing and processing of the previous Wolfson Audio Center to a whole new level, even lower than the most integrated, single-package-based cellular architecture. System bill of materials (BOM) costs ensure high quality audio performance.
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"The WM8994 Audio Center ensures improved performance, reduced BOM cost, reduced footprint and increased versatility by integrating audio processing, speaker, headphone and line drivers on a single chip," Ou Sheng Audio Center Product Line Manager Darren Hobbs said. “The WM8994 delivers market-leading audio performance for multimedia smartphones and other versatile portable devices, significantly extending playback time, and more end-user application support. For example, you are answering calls or navigation commands and using noise cancellation The technical speech recognition software can continue to listen to background music. There are countless possible replacements."
In most smartphones today, various audio signals input and output by speakers, microphones, music files, and headphones are routed in the device in an analog format. However, manufacturers are increasingly inclined to choose another highly flexible digital architecture. The WM8994's innovative HexCoreTM technology gives manufacturers the ability to develop multimedia handsets around this unique and highly flexible digital architecture, which also facilitates faster and easier connections to applications that require audio enhancement algorithms and software. Required signal processing. The WM8994 runs more of these advanced audio algorithms and applications simultaneously with an efficient power and space solution, while maintaining audio quality without compromise.
The WM8994 Center manages all audio processing and audio routing to ensure support for a wide range of audio architectures and usage scenarios. By managing, converting and processing a diverse range of audio sources including voice, speaker, microphone, music and headphone signals, the WM8994 is able to transform the functionality and performance of portable multimedia devices and a variety of new audio applications. These include mass music sharing - listening and discussing music on the phone - music without interruption and additional navigation instructions without disruption, and the ability to use voice control with noise reduction algorithms in car entertainment.
The WM8994 supports direct digital baseband connections with a sample rate converter (ASRC). To support Bluetooth connectivity, FM radio or wireless local area network (Wi-Fi), these require additional data paths and/or clock sources. The WM8994 provides clock and data multiplexers for third-party processors.
To support scenarios that require multiple microphones, such as noise cancellation and speech recognition, the WM8994 provides four digital microphone channels and a microphone activation detector to conserve power during quiet periods of voice command pauses.
Like other products in Wolfson's new Audio Center series, the WM8994 combines Wolfson's highly flexible audio center architecture with its latest ultra-low power and audio enhancement technology to deliver industry-leading audio performance and playback time of more than 100 hours.
Supply
Samples of the WM8994 are available now in an ultra-thin 72-pin 4.51x4.02x0.7mm W-CSP package.
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