|Developed by||HWA Union, Savitech|
|Type of format||Audio codec|
Low latency and High-Definition audio Codec (LHDC), also known as HWA, is an audio codec technology developed by the Hi-Res Wireless Audio (HWA) Union and Savitech. LHDC allows high-resolution audio streaming over Bluetooth. Its main competitors are Qualcomm's aptX-HD and Sony's LDAC codec.
On 17 September 2019, the Japan Audio Society (JAS) certified LHDC with their Hi-Res Audio Wireless certification. Currently the only codecs with the Hi-Res Audio Wireless certification are LHDC and LDAC.
As of Android 10, LHDC is not officially supported, LHDC is required to be implemented by smartphone manufacturers or Android apps. Android apps that support LHDC include Savitech's Hi-Res BT Player, FiiO Music, HIFIMAN Music and DA&T Audio.
Low Latency Audio Codec (LLAC) is based on the high definition wireless audio technology from LHDC, but designed for low latency. Savitech claims LLAC has end-to-end latency of around ~30ms. LLAC supports bitrates of 400/600kbit/s, bit-depth of up to 24 bit and sample rate of up to 48 kHz. LLAC has no hardware requirement for transmitter.
Hi-Res Wireless Audio (HWA) Union
On 2 September 2018 the Hi-Res Wireless Audio (HWA) Union was formed to promote LHDC adoption. Also knwon as the HWA Alliance. The HWA Union Board of Directors includes:
Other HWA Union members include:
On the March 27, 2018, Huawei and Savitech announced the Hi-Res Wireless Audio (HWA) Certification. Platinum HWA Certification requires frequency response over 40 kHz, THD+N<-90 dB, SNR>110 dB, and playback using the at least 24bit/96 kHz. Gold HWA Certification requires frequency response over 20 kHz, THD+N<-80 dB, SNR>100 dB, and playback using the at least 24bit/48 kHz.
- "What is LHDC". LHDC. Retrieved 2019-09-22.
- "Product Finder Mobile". hwa-audio. Retrieved 2019-09-22.
- Yeow, Goh Beng (2019-09-17). "Japan Audio Society certifies LHDC™ for "Hi-Res Audio Wireless" certification". Porta-Fi™. Retrieved 2019-09-22.
- "What is LLAC". LHDC. Retrieved 2019-09-22.
- "HWA". hwa-audio. Retrieved 2019-09-22.
- Yeow, Goh Beng (2018-09-01). "Hi-Res Wireless Audio (HWA) Union established". Porta-Fi™. Retrieved 2019-09-22.
- "HWA Certification Grading". hwa-audio. Retrieved 2019-09-22.