最近看了Intel新的平台Bay Trail Platform
HD Audio 與 LPE Audio 只能選一種使用
照字面來看 LPE 是 Low Power Engine
所以可以知道的是 LPE 是省電用
但若是 LPE 有優勢，為什麼不直接就留LPE Audio，還要有所選擇呢?
以下提供 LPE Audio 原文介紹參考
The Low Power Engine for Audio provides acceleration for common audio and voice functions. The voice and audio engine provides a mechanism for rendering audio and voice streams and tones from the operating system, applications to an audio or voice codec, and ultimately to the speaker, headphones, or Bluetooth headsets.
Audio streams in the SoC can be encoded and decoded by the Low Power Engine (LPE) in the Audio subsystem.
LPE Audio provides three external I2S audio interfaces.
Features
A complete audio solution based on an internal audio processing engine which includes several I2S-based output ports.
The audio core used is a dedicated audio DSP core designed specifically for audio processing (decoding, post-processing, mixing, etc.)
Main features of the core are:
• Core Frequency of 25-320 MHz
• Moving to cache based architecture inside LPE
• Supports full I2S
• Decode the known samples from the encoded streams
• Performs audio processing
• Mixes the streams into a single output stream
• Outputs on the relevant I2S port
HD Audio 與 LPE Audio 只能選一種使用
照字面來看 LPE 是 Low Power Engine
所以可以知道的是 LPE 是省電用
但若是 LPE 有優勢，為什麼不直接就留LPE Audio，還要有所選擇呢?
以下提供 LPE Audio 原文介紹參考
The Low Power Engine for Audio provides acceleration for common audio and voice functions. The voice and audio engine provides a mechanism for rendering audio and voice streams and tones from the operating system, applications to an audio or voice codec, and ultimately to the speaker, headphones, or Bluetooth headsets.
Audio streams in the SoC can be encoded and decoded by the Low Power Engine (LPE) in the Audio subsystem.
LPE Audio provides three external I2S audio interfaces.
Features
A complete audio solution based on an internal audio processing engine which includes several I2S-based output ports.
The audio core used is a dedicated audio DSP core designed specifically for audio processing (decoding, post-processing, mixing, etc.)
Main features of the core are:
• Core Frequency of 25-320 MHz
• Moving to cache based architecture inside LPE
• Supports full I2S
• Decode the known samples from the encoded streams
• Performs audio processing
• Mixes the streams into a single output stream
• Outputs on the relevant I2S port