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Thanks to IT Home reader 华南吴彦祖 for the tip!
IT Home reported on November 5 that the Bluetooth Special Interest Group (Bluetooth SIG) issued an announcement yesterday (November 4), announcing the adoption of Bluetooth High Data Throughput (HDT) technology as an optional feature in Bluetooth Core Specification 7.0.
HDT technology can be seen as an enhanced version of Bluetooth Low Energy (Bluetooth LE). By introducing a new physical layer (PHY), it raises the maximum bit rate from 2 Mbps to 7.5 Mbps, a 275% increase, allowing devices to carry more data more efficiently over the same Bluetooth link.
Citing a blog post, IT Home noted that 7.5 Mbps is the peak physical-layer bit rate, not the throughput actually available to users; actual speeds will be affected by distance, interference, device radio capabilities, protocol overhead and connection configuration.
In addition to higher speeds, HDT offers greater capacity (improved spectral efficiency), better energy efficiency (faster transfers mean the radio module can enter a low-power state sooner) and greater reliability (more robust communication, maintaining a more stable connection in more complex environments or those with more interference).
In terms of applications, the first flagship use case identified by the organization is premium wireless audio: HDT provides the capacity and efficiency needed to support high-resolution and lossless audio, while also enabling experiences such as surround sound and spatial audio. Other key use cases include:
Low-latency data interaction for XR, spatial computing and immersive devices.
Larger exchanges of model, sensor and contextual data between AI edge devices.
Commercial and industrial automation, monitoring and operational systems.
Fast synchronization, file transfers and over-the-air (OTA) firmware upgrades for wearables, health devices, smart homes and peripherals.
For ordinary users, HDT's most direct impact will be in areas such as wireless audio, device pairing, file synchronization and firmware upgrades. The higher bandwidth is expected to support lossless music, high-resolution audio, spatial audio and multichannel surround sound, while reducing the time spent waiting for system updates on devices such as earbuds and watches.
The Bluetooth SIG expects the first HDT-enabled devices to appear around early 2027, followed by a gradual expansion to more products, including earbuds, smart wearables, phones, computers and XR devices. HDT is an optional feature, and existing Bluetooth devices generally cannot gain it through a software upgrade alone.