One of the important factors that determines sound quality when connecting Bluetooth audio devices such as earphones and speakers to smartphones and portable audio players is the compression conversion method when transmitting audio, that is, codec.Until now, there were four types of codecs corresponding to A2DP, which are Bluetooth audio signal transmission standards (profiles), in addition to the most basic SBC, AAC, APTX and LDAC.Way) has announced the new wireless audio technology "HWA".
ファーウェイの最新スマホ「P20 Pro」はHWAをサポートしている。国内でもNTTドコモが発売したHWA is a technology aimed at high-quality rehabilitation equivalent to high-resolution by Bluetooth transmission, such as LDAC and AptX HD, and the audio codec "LHDC" developed by Taiwan's semiconductor manufacturer Savitech is a base.I am.HWA compatible devices will be equipped with hardware supplied from Savitech or codecs with software.
HWA is characterized by being able to transmit data at a bit rate of about 900 kbps, which is about three times the amount of information of SBC, which is a basic audio codec, which is "LDAC" (up to about 990 kbps) developed by Sony.It can be said that it is an approaching number.It also features a high -resolution sound source up to 96kHz/24bit with a frequency band and bit depth.And HWA's authentication devices are expected to be divided into "Premium" compatible with up to 96kHz/24bit, and "standard" up to 48kHz/24bit.
LHDCとSBCの比較As of July, there are two models: Huawei's latest smartphone "P20 Pro" and "P20".HWA's promotion site also features Huawei P20 Lite as a compatible model, but apparently this unit does not plan to support HWA, including software updates.It was confirmed that the P20 Pro, which was released by NTT DOCOMO in Japan, supports HWA, but there is no way to check the sound quality at the moment because headphones and speakers on the receiving side are not sold.
Currently, there are a wide range of brands that have been claiming to be HWA partners, and audio makers include Zenheiser, Astell & Kern, Onkyo, Pioneer, and Radius.I look forward to the announcement of headphones or earphones from any manufacturer this fall.
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