Shulou(Shulou.com)11/24 Report--

With the launch of Huawei FreeBuds Pro 3, the saying of "Bluetooth headset is ringing" is leaving the stage.

On September 25, Huawei's new flagship acoustic product, Huawei FreeBuds Pro 3, was officially unveiled at the launch of Huawei's autumn full-scene new products.

The headset is equipped with Kirin A2, an audio chip that supports Polar code technology, which makes Huawei FreeBuds Pro 3 a "star flash headset", which brings 1.5Mbps lossless audio transmission and officially moves the TWS industry into a lossless era.

As we all know, the basic work flow of wireless headphones is that the front end encodes and compresses the sound information, then transmits it to the headset through Bluetooth, and then decodes and plays the sound information, which is called "codec".

The process of encoding and decoding involves the amount of "loss" of sound source information, which is closely related to the final sound quality performance, and is a key factor affecting wireless audio quality, as is the case with what we call "lossless sound quality" and "lossy sound quality".

For a long time, TWS headphones cannot be truly "lossless" because their audio transmission protocols cannot meet the audio codec standard of CD Lossless Music transfer rate requirements (1.41Mbps). Therefore, no matter how much the algorithm is optimized, TWS sound quality is always better than wired headphones.

Huawei FreeBuds Pro 3 is able to achieve the real 1.5Mbps lossless audio transmission, first of all, it supports the new L2HC 3.0. the new L2HC standard just released a few days ago extends the audio transmission rate to 64K~1920Kbps and supports 96kHz / 24bit HD audio transmission, which is the latest HD wireless audio codec standard in China, and it is also a protocol that can achieve super CD level lossless audio quality.

It should be added that Huawei is a core contributor to L2HC standards. Huawei FreeBuds Pro2 has been equipped with Huawei L2HC 2.0 as early as 2022, and has achieved a full-link HD sound quality experience. This generation of FreeBuds Pro 3 achieves full-link lossless sound quality through L2HC 3.0.

The second core advantage of Huawei FreeBuds Pro 3 is the blessing of Kirin A2 chip.

Kirin A2 is an audio chip launched by Huawei that supports Polar code technology, which has the core advantages of fast transmission, low power consumption, high performance and high integration.

Specifically, the Kirin A2 chip integrates dual DSP processing units, which improves the computing performance by two times compared with the Kirin A1 chip; the overall PCB size is reduced by 20% compared with Kirin A1, and the overall weight of FreeBuds Pro 3 is reduced by 5%; the advantage of low power consumption is reduced by 50% compared with the previous generation, achieving a more lasting battery life performance.

Of course, none of these are the most important, and it is exciting that Huawei short-range and acoustics experts have applied the Polar polarization code technology in the field of mobile communications and the core technology of star flash connection to the Kirin A2 chip.

With regard to the Polar code, here is a simple popular science:

Polar code is a coding technology that can be proved in theory to reach the limit of Shannon theory, and it is also adopted by 5G standard. Huawei also started research in 2009, the year after the Polar code was discovered. After years of tackling key problems, Huawei's Polar Code (polarization Code) has been recognized by the industry and become a 5G NR control channel coding scheme.

Thanks to the extremely low complexity, low delay and strong anti-jamming ability of Polar code, Huawei began to introduce Polar code into Bluetooth communication in 2019.

Star flash, a new generation of wireless short-distance communication technology, one of its core technologies is the physical channel coding algorithm of Polar code.

Therefore, Kirin A2 chip has become an audio chip equipped with Polar code. According to the official description, it brings the anti-jamming capability of 6dB, which increases the anti-jamming ability of audio Bluetooth transmission by two times, increases the transmission distance by two times, and saves power consumption by 40%. Relying on Polar code technology, the audio transmission rate of FreeBuds Pro 3 runs stably in 1.5Mbps, achieving a real super-CD lossless sound quality.

In addition to compromising sound quality, Huawei FreeBuds Pro 3 also brings a new quiet call 2.0 and intelligent dynamic noise reduction 3.0 thanks to the powerful computing power of Kirin A2 chip.

Specifically, the double DSP audio processing unit derived from Kirin A2 achieves more powerful audio computing capabilities and supports a larger amount of data. Through the operation of a more complex multi-channel neural network algorithm, the human voice band and full-band audio signals can be processed separately and then dynamically fused, finally allowing users to achieve an excellent call noise reduction experience in any environment.

With the same powerful arithmetic power, Kirin A2 comprehensively upgraded Huawei's self-research hearing optimization algorithm, realizing real-time optimization of triple hearing sensation, supporting real-time matching of volume, ear structure and wearing status, optimizing the wearer's hearing sensation in real time, adjusting EQ, and bringing a combination of three modes of noise reduction and real-time noise reduction, creating a "sound measurement customization" noise reduction experience for users.

Huawei FreeBuds Pro 3 also ushered in Spatial Audio 2.0. the self-developed high-resolution spatial model algorithm reduces delay by 25%, improves dynamic response flatness by 25%, and improves resolution accuracy by 40 °, so that users' spatial perception can be fully upgraded.

Finally, there is a new intelligent experience brought about by HarmonyOS 4, including offline search function, ringing search, intelligent drop reminder and other functions, as well as a series of powerful functions such as audio service card, full scene hyperterminal, audio connection center, audio sharing, wisdom broadcast and so on. All in all, with the blessing of Kirin A2, Huawei FreeBuds Pro 3 has achieved all-round upgrade experiences such as audio, intelligent interaction and battery life, further adding to the acoustic flagship positioning.

In the end, on the road to promoting the popularity of lossless audio experience, Huawei has once again stepped out of the huge gap that is far ahead of its peers.

Second-class enterprises to make products, first-class enterprises to do standards, Huawei FreeBuds Pro 3 to the industry benchmark posture, through technological innovation and standard-setting, empower the entire audio field.

Especially under the blessing of Kirin A2 chip pedestal, Huawei FreeBuds Pro 3 has brought full-link lossless audio technology, which is why Huawei dares to shout out the strength of the TWS industry to officially enter a lossless era, Kirin A2, Polar code, L2HC 3.0, all of which are indispensable.

Under the leadership of Huawei FreeBuds Pro 3, the entire TWS industry will develop to lossless sound quality and continue to move forward. It is also enough to expect that with the listing of Huawei FreeBuds Pro 3, it will further promote the sound quality innovation of the streaming media industry. after all, Huawei FreeBuds Pro 3 has achieved a real sense of "lossless". With Huawei's influence and appeal, it will certainly lead the upstream music industry to further popularize and damage good sound quality, and it will eventually be our ordinary consumers who will benefit.

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