新的壓縮技術，不知道進步多少？
CSR's world renowned aptX™ audio compression solutions retain the full integrity of original digital audio and are optimised for instant real-time audio streaming. The suite of algorithms has earned a reputation for some of the highest audio quality, extremely low latency and strong resilience to bit errors, and has been proven in wireless, broadcast and professional live performance applications.

http://www.csr.com/products/60/aptx-bluetooth

Description

By incorporating aptX audio coding technology into the next generation of Bluetooth stereo products, developers can offer consumers audio quality indistinguishable from wired with an impressive dynamic range. aptX encoded audio fits neatly within the available bandwidth of wireless transmission standards to offer an efficient solution for band-width restricted connections.

Key features

  • Compression ratio: 4:1
  • Audio Format: 16-bit, 44.1kHz (CD-Quality)
  • Data Rates: 352kbps
  • Frequency Response: 10Hz to 22kHz
  • Algorithmic Delay: <1.89ms @ Fs 48KHz
  • Dynamic Range: 16-bit: >92dB
  • THD+N: -68.8dB


Benefits

  • Outstanding Bluetooth Stereo audio quality
  • Audio bandwidth matching CD performance
  • Flat Frequency Response. Full audio bandwidth faithfully reproduced
  • Low audio coding delay. Minimizes latency and ‘lip-sync’ issues
  • Non destructive transcoding, means there are no dueling effects with other algorithms
  • Uses Time Domain ADPCM principle rather than Psychoacoustic masking
  • Small code / data memory size
  • Backward Compatibility: when apt-X is not available target device will pair down to SBC


Product details

The aptX Bluetooth audio codec is available for high quality stereo audio over Bluetooth. When incorporated in Bluetooth A2DP Stereo products, apt-X Bluetooth audio coding delivers full 'wired' audio quality. With aptX Bluetooth source material is transparently delivered over the Bluetooth link, whether it is stored uncompressed or in an alternative compression (MP3, AAC, FLAC) format.
  • Bluetooth stereo headphones / headsets
  • Bluetooth automotive audio
  • Bluetooth stereo speakers