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T2M Bluetooth LC3plus Audio Codec

LC3plus Audio Codec

Description and Features

The LC3plus audio codec is a highly optimized and highly efficient audio codec introduced for Bluetooth LE Audio, DECT and VoIP that dramatically improves streaming audio quality, reduces power, improves bandwidth and delivers ultra-low latency down to 5ms. The LC3plus audio codec has also received the Hi-Res Audio Wireless certification logo issued by the Japan Audio Society (JAS) for its ability to reproduce 40KHz frequencies when running at 96KHz with 24bit samples.


Our LC3plus and LC3 audio codecs are fixed point production proven implementations supporting all mandatory and optional features

LC3 Codec Development Status

The LC3 Codec Design is ready to license and available for the following  CPUs/DSPs

  • ARM® M4
  • RISC-V
  • HiFi® 3/5
  • Qualcomm® Kalimba™ DSP
  • Proprietary DSPs*

In addition to LC3plus, a new technology the High-Definition Mobile Audio (HDMA) will be introduced next year. HDMA is poised to further elevate the audio quality and capabilities of LC3plus, promising even more immersive and superior audio experiences.


  • All Sampling Frequencies (8kHz, 16 kHz, 32 kHz, 44.1 kHz, and 48 kHz, For high-resolution Mode LC3 Plus also supports 96 kHz)

  • Supports 16, 24, and 32 bits per audio sample

  • Supports 2.5ms, 5 ms and 10ms frame interval

  • Supports 20 to 400 bytes per frame and channel for 10 ms

  • Supports 20 to 200 bytes per frame and channel for 5 ms

  • Supports 20 to 100 bytes per frame and channel for 2.5 ms

  • LC3plus decoder accepts up to 400 bytes per frame independent of frame duration

  • Packet Loss Concealment as defined in LC3 Plus specification

  • Error correction modes are available

  • No restrictions with number of supported channels.