More capacity for wireless audio
Bluetooth SIG today detailed Bluetooth HDT, which supports a maximum bit rate of 7.5 Mbps and is intended to enable standardized lossless and high-resolution wireless audio (opens in a new tab). Premium wireless audio is planned as its first flagship application, putting listening at the center of the technology's initial use.
- Formats
- Intended to support standardized high-resolution and lossless audio
- Wireless
- Bluetooth HDT introduces a new PHY for Bluetooth LE, with data rates up to 7.5 Mbps
Bluetooth HDT adds a physical layer, or PHY, through which Bluetooth LE devices can carry more information over their wireless connection. Its maximum supported bit rate is nearly four times the maximum of the Bluetooth LE 2M PHY, according to Bluetooth SIG. The group also identifies spatial audio and surround sound as potential uses for the additional wireless capacity.
How the wireless link could change
Bluetooth SIG says the efficiency gains come partly from sending a greater amount of data in a shorter period. That lets the radio reduce its active transmission time and spend longer in states that consume less power, according to the group. It also says Bluetooth HDT uses the available spectrum more efficiently, giving devices additional capacity within their wireless resources.
For connections in demanding wireless environments, Bluetooth SIG says Bluetooth HDT improves resilience and helps devices sustain connectivity more consistently. The group also claims better coexistence with other wireless technologies, alongside the increase in transfer speed.
Beyond audio, Bluetooth SIG says the faster transfers can shorten synchronization, file transfers and firmware updates for connected products. It also identifies peripherals and immersive computing as applications, with the latter expected to benefit from more responsive interactions between devices.