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Analog eLAB ™

MP3 Player/Recorder (Portable Audio)

Headphone Amp Audio DACs and Codecs Speaker Amp USB DC/DC Step-Down Converter DC/DC Boost Converter Charger Linear Regulator (LDO) Sync Boost Converter DSP

MP3/Voice Recorder-Player

The MP3/Voice Recorder-Player performs noise reduction, speech compression, and MP3 stereo recording/playback at all rates and options required by the MPEG/speech compression standards.

The core subsystems include:

  • DSP
     - performs the audio/encode functions, executes post-processing algorithms like eq and bass management and system related tasks like file management and the user interface control.
     
  • Memory
     - stores executing code and data/parameters.
     
  • Peripheral Interface
     - allows user to control I/Os and display.
     
  • Audio/voice CODEC
     - interface with the phone lines, audio input, microphone, headphone, and speaker for digitizing the audio in the DSP.
     
  • Power Conversion
     - converts the battery power to run various functional blocks.