1. The earliest format supporting SBC should be SBC, which is the mandatory coding format of A2DP (Advanced Audio Distribution Summary) protocol. All Bluetooth will support this protocol, so all Bluetooth audio chips will also support this protocol, so there is nothing to say about this freebuds headset.
2. Supporting ACC ACC is a technology provided by Dolby Laboratories for the music community, and it is a coding algorithm with high compression ratio. In practical experience, it is considered that ACC is better than MP3 at the same bit rate, and ACC on Apple has a lot of audio.
3. APTX·APTX is not supported. APTX is a patented coding algorithm of CSR company. After being acquired by Qualcomm, APTX has been widely promoted in Android phones. There are three types of aptX: aptX, aptX HD and aptX low latency. According to their names, they are traditional aptX, high quality aptX and low latency aptX. In fact, the estimation of transmission rate is not high, which may be similar to the first two, but thanks to efficient coding, the sound retains more details and the actual hearing is better than the first two. AptX also claims that it can achieve CD-level hearing.
4. LDAC is not supported. LDAC can transmit about 3 times the data of ordinary Bluetooth * 1 (the highest transmission speed is 990kbps *2), so that you can hear the sound quality close to Hi-Res Audio*3 music wirelessly. At such a high transmission speed, it is possible to transmit lossless music. But there is no doubt that the transmission rate of LDAC has been greatly improved, which makes the transmitted audio quality higher and the listening sense is naturally the best.
5. HWA HWA is not supported. It is a Bluetooth transmission format developed by Huawei. The HWA standard (LHDC codec) is similar to the LDAC standard, which refers to the transmission of Hi-Res audio files through the existing 4.x Bluetooth (A2DP protocol) to obtain a better listening experience. Like LDAC, what HWA can achieve at this stage can only be close to lossless level, instead of really transmitting lossless audio. Of course, this conference announced many Hi-Fi brands, such as Sennheiser, Iron Triangle, Joan, iriver, HIFIMAN and so on. , has joined the HWA system and may open a free license in the future. There is no doubt that the HWA standard is a new Bluetooth technology with great development potential.
As a new product of Huawei, freebuds Bluetooth headset does not support its own new Bluetooth transmission format, which is also very intriguing.