{"id":13183,"date":"2021-06-10T15:29:48","date_gmt":"2021-06-10T13:29:48","guid":{"rendered":"https:\/\/demdlx704as001.ad.harman.com\/?p=13183"},"modified":"2024-02-21T08:11:21","modified_gmt":"2024-02-21T07:11:21","slug":"clarifi","status":"publish","type":"post","link":"https:\/\/audioworx.transfunnel.co\/old\/?p=13183","title":{"rendered":"ClariFi"},"content":{"rendered":"

The ClariFi algorithm analyzes the content stereo audio streams for losses in fidelity associated with perceptual coding or lossy (i.e. destructive) compression and adds an estimate of these losses back to the original signal.<\/span>
\nThe treatment of compressed signals is based on careful assumption and scientific probabilities with a goal ultimately to provide a significantly improved listening experience, that is preferable to original unprocessed input.<\/span><\/p>\n

ClariFi Properties<\/strong><\/p>\n

Below table describes about the ClariFi audio object properties and functionality.<\/p>\n

\"A<\/p>\n\n\n\n\n\n
Properties<\/strong><\/span><\/td>\nDescription<\/strong><\/span><\/td>\n<\/tr>\n
Display Name<\/strong><\/span><\/td>\nDisplay the name of the ClariFi audio object in signal flow design. It can be changed based on the intended usage of the object.<\/span><\/td>\n<\/tr>\n
Object Mode<\/strong><\/span><\/td>\nClariFi audio object supports two modes.<\/span><\/p>\n
    \n
  • Fixed<\/span><\/li>\n
  • Auto-Detect<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    Mode<\/strong><\/p>\n\n\n\n\n\n
    Mode<\/strong><\/span><\/td>\nDescription<\/strong><\/span><\/td>\n<\/tr>\n
    Fixed<\/strong><\/span><\/td>\nA constant treatment level is applied regardless of the quality or bitrate of the incoming audio. It is best to use this mode when source quality is known or highly predictable, e.g satellite radio.<\/span><\/p>\n
      \n
    • pros: input audio will be treated consistently regardless of content.<\/span><\/li>\n
    • cons: constant treatment level will be applied regardless of source quality.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n
    Auto-Detect<\/strong><\/span><\/td>\nA variable treatment level is applied based on the analysis of incoming audio. It is best to use this mode when source quality is unknown or unpredictable, e.g., input from iPod, USB, Bluetooth, analog inputs, or streaming from arbitrary apps.<\/span><\/p>\n
      \n
    • pros: treatment level is very accurate\/appropriate for most codecs. The treatment level will reset and recalibrate after a mute longer than 120ms (e.g., a track change).<\/span><\/li>\n
    • cons: some streams, even while compressed, will not trigger any treatment to be applied.<\/span><\/li>\n<\/ul>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      Memory allocation for optimized MCPS on GUL<\/em><\/span><\/p>\n

      The Clarifi algorithm uses FFT algorithm. There are six buffers used by FFT. For FFT to work these buffers must be allocated in internal memory.\u00a0 There is also memory alignment requirements.<\/span>
      \nRefer below table for memory records and alignment.<\/span><\/p>\n\n\n\n\n\n\n\n\n\n
      Memory Record Label<\/strong><\/span><\/td>\nAlignment in Bytes<\/strong><\/span><\/td>\n<\/tr>\n
      FFT real Input signal-critical for MCPS<\/span><\/td>\n\n

      4096 for Block size = 512<\/span><\/p>\n

      2048 for Block size = 256<\/span><\/td>\n<\/tr>\n

      FFT imaginary input signal-critical for MCPS<\/span><\/td>\n\n

      4096 for Block size = 512<\/span><\/p>\n

      2048 for Block size = 256<\/span><\/td>\n<\/tr>\n

      FFT temporary buffer1-critical for MCPS<\/span><\/td>\n8<\/span><\/td>\n<\/tr>\n
      FFT temporary buffer2-critical for MCPS<\/span><\/td>\n8<\/span><\/td>\n<\/tr>\n
      FFT Twiddle real part-critical for MCPS<\/span><\/td>\n8<\/span><\/td>\n<\/tr>\n
      FFT Twiddle imaginary part-critical for MCPS<\/span><\/td>\n8<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

      For better MCPS performance allocate these buffers to lower memory latency levels.<\/span>
      \nMCPS can be further improved if these buffers are placed in different block of lower memory latency.<\/span><\/p>\n

      In xAF design:<\/span><\/p>\n

        \n
      • Level1 latency is mapped to L1 memory Block 0<\/span><\/li>\n
      • Level2 latency is mapped to L1 memory Block 1<\/span><\/li>\n
      • Level3 latency is mapped to L1 memory Block 2<\/span><\/li>\n<\/ul>\n

        Below is example of memory allocation for improved MCPS performance.<\/span><\/p>\n

        \"A<\/p>\n

        Additional Parameters<\/strong><\/p>\n

        There are no additional parameters available for ClariFi audio object.<\/p>\n

        Tuning Parameters<\/strong><\/p>\n

        ClariFi can be tuned by the GTT tuning panel.\u00a0 Below table describe supported tuning parameters.<\/p>\n