HTC J Butterfly HTV31 Smartphone

(Currently only available in Japan) With it’s stunning good looks, perfectly matched colours and crystal-clear 4.3” display, the HTC J is the phone that steals the scene. Capture every memorable moment by the amazing camera of HTC J and ImageSense lets you capture crisp, vivid and beautiful photos. The built-in Beats Audio™ adjusts the sound quality to give you authentic, crisp sound with deep powerful bass for music, games, movies and video. aptX™ support ensures you can experience Bluetooth® audio as the artist orginally intended.

Key aptX™ Features

Consistent audio quality

Fixed compression ratio ensures consistency

Full spectrum of sound

From 20Hz to 20kHz, aptX audio covers the human hearing range

Interoperability testing program

We operate rigorous testing for all aptX enabled products, so you can be confident all products will deliver the same audio quality

aptX™ Tech Specifications

Sound quality
  • THD+N@1kHz: -67dB
  • SNR@1kHz:  93dB
  • PEAQ audio quality:-0.18
  • Qualcomm® Kalimba™ MHz DSP technology: 42MHz@48KHz stereo decode ~45MHz@48KHz stereo encode
Audio Encoding
  • 16-bit, up to 48kHz sampling rate
Program memory usage
  • 3.3kwords (encoder) / 3.6kwords (decoder) 
Data memory usage
  • 1.8kwords
ARM MHz
  • ~63MHz (stereo encode) on ARMv7A with NEON 
Bit Rate
  • 384 kbps (48 kHz sampling)