MIPI Alliance has come up with a new protocol standard for sound interface called SoundWire. SoundWire is a robust, scalable, low complexity, low power, low latency, two-pin (clock and data) multi-drop bus that allows for the transfer of multiple audio streams and embedded control/commands. To understand its specification and design verification needs, it is important to understand basics of digital audio transmission. This paper explains the common digital audio formats, PCM and PDM, which are target applications for MIPI Soundwire.
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