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Bluetooth 5.1 Audio Speaker Solution

The biggest change in the speaker device market over the past few years has been the crazy growth in sales of portable Bluetooth speakers. With the advantages of no cables, small size, and no need to toss the front end.

When it comes to the factors that affect the sound quality of Bluetooth speakers, many people may first think of the loss caused by Bluetooth audio transmission. In fact, as early as the era of Bluetooth 2.0 / 2.1, the rate of Bluetooth transmission has reached 2.1 Mbps, which is enough to meet the transmission of high-quality audio. However, when performing Bluetooth audio transmission, whether it is the early Bluetooth 2.0 / 2.1 or the popular Bluetooth 4.0 today, the same A2DP protocol is used. Since the A2DP protocol greatly limits the transmission bandwidth, the audio signal needs to be effectively compressed to ensure real-time playback at the receiving end, which results in a variety of different encoding and decoding schemes in Bluetooth audio devices.

There are mainly four types of existing Bluetooth audio codec schemes: SBC, AAC, apt-X and LDAC. Among them, SBC is the ancient but still the most common Bluetooth audio codec scheme, while AAC and apt-X are relatively new. Some improvements have been made in the SBC solution. In theory, the sound quality is better than the SBC solution. The AAC solution is mainly used in Apple devices such as the iPhone. Sony has launched the LDAC Bluetooth transmission standard, which can provide a maximum bandwidth of 990kbps, which is higher than apt-X. be higher.

Currently, Shenzhen Huayang Xinke Electronics Co., Ltd has Bluetooth 5.1 audio module HY-BT301 module for the high quality speaker solution, this module use Qualcomm QCC5125 Bluetooth chip. This module supports SBC, ACC, aptX, aptX LL, aptX HD, and LDAC audio codec for Bluetooth audio speaker. 

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