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Asynchronous Sample Rate Converter (ASRC)

 

Bundled With:

ISE

License:

Xilinx End User License

Program:

LogiCORE

A high quality, fully featured Asynchronous Sample Rate Converter which enables dramatic BOM reduction, particularly for multichannel audio designs, and accelerates time-to-market.

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Documentation
Device Family Support
  • Virtex-6 LXT
  • Virtex-6 SXT
  • Spartan-6 LX
  • Spartan-6 LXT
  • Virtex-6 CXT

ASRC offers BOM cost reduction through integration of audio processing with other functions and provision of core gives a time-to-market advantage.

The Asynchronous Sample Rate Converter (ASRC) LogiCORE™ IP converts stereo audio from one sample frequency to another.  The input and output sample frequencies may be an arbitrary fraction of one another or the same frequency, but based on different clocks.   The output is a band-limited version of the input, re-sampled to match the output sample timing.  

Key Features

  • Fully Asynchronous Up-Conversion, Down-Conversion, and 1:1 Asynchronous Conversion
  • -133 dB THD + N  Typical  (Range: -126 dB  to -139 dB)
  • Input Rates 8 kHz to 192 kHz; Output Rates 8 kHz to 192 kHz; Conversion Ratio 1:7.5 (Down) to 8:1 (Up); All Continuous
  • 24-bit Audio Word Width In and Out
  • Choice of Automatic Ratio Detection (Including Rate Change Tracking  or Varispeed) or Manual Ratio Control Automatic Ratio Detection
  • Efficient Multi-channel Expansion.  Expand to 8 Stereo Pairs for only 60% Additional Resources Compared to One Stereo Pair
  • Sample Clock Jitter Rejection. Retains full performance over AES3-2003 jitter tolerance curve
  • Low, Deterministic Latency
  • Lock Status Outputs Provided for External Muting
 
What are the new features in the ASRC LogiCORE™ IP? Which Xilinx FPGA families and speed grades does the ASRC core support?
  • All Spartan®-6 and Virtex®-6 FPGAs in -1 speed grade

What are the target applications for this product?

  • The ASRC core is primarily targeted at professional audio equipment in the broadcast and high end A/V markets. Target applications include production switchers, routers, mixing desks, audio recorders and editing stations. However the ASRC core can also be used in automotive and high end consumer applications as well.

Do you support other Embedded Audio (AES3 streams in SDI)?

  • Yes, we have a prerelease reference design which is being made into LogiCORE IP for ISE14.2. Please contact your distributor or Xilinx FAE for access to the prerelease embedded audio designs if needed sooner.

Has the ASRC core been verified on hardware?

  • Yes, the core has been fully tested and verified on the Virtex-6 Broadcast Connectivity Kit and both the SP605 and Spartan-6 Broadcast Connectivity Kit.

Where can I find a list of known issues?

 
 
 
 
 
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