Qualcomm® aptX™ HD

Wireless HD audio

Fans enjoying high definition audio at a concert

The high definition audio your ears deserve

Qualcomm aptX HD was designed to answer the growing demand for high resolution audio. This enhanced codec supports 24-bit music quality over Bluetooth. This means listeners can hear even the smallest details in their music.

Key Features

Wireless HD sound

aptX HD is designed to deliver 24-bit wireless audio wirelessly over Bluetooth

High signal output for amazing sound

aptX HD has been engineered to improve the signal-to-noise ratio, resulting in lower background noise

Minimal sound distortion

With lower Total Harmonic Distortion (THD) and no audio artefacts you can enjoy your music with hardly any interference

“Indistinguishable from high resolution audio”

“From the analysis of the results from the 24 participants that took part in the test it is concluded that participants were unable to consistently detect a difference between 96kHz/24bit audio and 48kHz/24bit aptX HD encoded and decoded audio”

- Salford University independent test results, 2015

Technical Specifications

Sound quality
  • THD+N@1kHz:  -80dB
  • SNR@1kHz:  129dB
  • PEAQ audio quality: -0.05
Audio Encoding
  • 24-bit, up to 48kHz sampling rate
Program memory usage
  • 3.3kwords (encoder) / 3.6kwords (decoder) 
Data memory usage
  • 1.8kwords
Bit Rate
  • 576 Kbits (48 kHz sampling)
Capability
  • Backwards compatible with existing aptX products

The other versions of aptX

By adapting sound to the use case, say watching a video rather than listening to music, it optimizes your experience and brings improved robustness for a better listening experience, fully synchronized audio and video and an overall more seamless user experience.

Designed to deliver fully synchronized audio and video content, just the thing for using a Bluetooth wireless headset for gaming, where milliseconds mean virtual life or death.

Our original aptX technology powers the wireless sound behind many of the world’s finest smartphones, speakers, soundbars, headphones and tablets.

Qualcomm aptX is a product of Qualcomm Technologies, Inc. and/or its subsidiaries.