Huawei FreeBuds Pro 3: The first super CD-level lossless sound quality, new Bluetooth protocol 4 times faster than Apple!

There has always been a saying in the headphone industry - Bluetooth headsets can only be heard. Ridicule is ridicule, but it also reflects an indisputable fact: the loss of audio information during wireless transmission is a problem that is difficult to overcome.

However, with Huawei's efforts in the audio field in recent years, the saying that "Bluetooth headsets can only be heard" seems to be outdated soon

On the 19th, as reported by Electronic Four At the 2023 GAS Audio Technology Summit jointly organized by the Academy and the Chinese Audio Society, the new L2HC standard was officially released. This is also my country's first high-definition wireless audio codec standard.

From "high definition" to "lossless", what is the strength of L2HC?

We know that the basic workflow of wireless headphones is that the front end first encodes and compresses the sound information, and then transmits it to the headphones through Bluetooth. The headphones then decode and play the sound information. This is "coding and decoding".

The encoding and decoding process involves the "loss" of sound source information, which is what we often call lossy and lossless. Therefore, it is closely related to the final sound quality performance and is a key factor affecting wireless audio quality. The significance of the birth of the L2HC protocol is to further reduce the "loss" in the audio wireless transmission codec and transmission process, thereby achieving Wireless headsets have better audio performance

In the past, there were many audio codec protocols, such as the early AAC codec, SBC, LC3, etc., as well as protocols like aptX, LDAC, and LHDC. However, the highest bit rate of these codec protocols can never reach CD-level lossless sound quality, that is, 1.41Mbps

Of course, once the bit rate reaches 900Kbps Above, the sound quality performance will be quite good. For example, my country's first high-definition wireless audio standard HWA and Sony's Hi-Res Gold Label have peak bit rates that can reach 900+Kbps. Products certified by these standards can provide a high-quality audio experience

However, according to industry consensus, if you want to obtain true CD-level sound quality, you need a 1.41Mbps bit rate (generally 44.1kHz / 16bit, code Rate: 44.1k×16×2≈1.41Mbps) can be achieved.

The above protocols are actually still a little far away from true CD-level sound quality.

So, the new L2HC standard was born.

The new L2HC standard extends the audio transmission bit rate to 64K~1920Kbps, while supporting 96kHz/24bit high-definition audio transmission. This standard is also currently the only audio codec standard that exceeds CD-level lossless music transmission bit rate requirements (1.41Mbps)

The emergence of the new L2HC standard completely solves the limitations of Bluetooth transmission speed and achieves true Lossless audio signal transmission. Equipment using the L2HC protocol will be able to provide consumers with high-fidelity CD-level sound quality

The L2HC standard not only has revolutionary advantages in transmission rate, but is also the world's first unified architecture full-rate wireless audio codec standard. It is also a global leader in terms of anti-interference and compatibility

For example, through powerful anti-interference performance, it automatically adjusts the bit rate according to scene changes to improve the anti-interference ability of wireless transmission; even in shopping malls, airports, etc. In strong interference environments, it can still provide users with a stable high-definition audio experience; it has high compatibility and can be compatible with transmission technologies such as Bluetooth and Star Flash; it supports 5ms and 10ms frame lengths, making it possible to watch videos, play games and enjoy space. During the audio process, the audio transmission becomes more immersive

In short, with the release of the new L2HC standard, a new standard for the wireless audio industry was born, which also symbolizes that the global wireless audio industry has officially moved from "high-definition" to "lossless" "develop.

StarLight core technology L2HC protocol, Huawei FreeBuds Pro 3 starts a lossless audio revolution

Huawei’s latest generation in-ear flagship TWS headset-Huawei FreeBuds Pro 3 has been unveiled overseas. This headset will adopt the new L2HC 3.0 technology and become the industry's first "StarLight headset" to use the core technology of StarLight connection - Polar code technology

With the blessing of these two world-leading technologies , Huawei FreeBuds Pro 3 has achieved the industry's top transmission capabilities. When used with Huawei Mate60 series and other mobile phones, the transmission bit rate can reach 1.5Mbps, bringing true super CD-level lossless sound quality.

About NearLink, this is a new generation of wireless short-range communication technology. It complements the disadvantages of Bluetooth and Wi-Fi and integrates their advantages. It is a technology that can truly satisfy the Internet of Everything. Like the L2HC protocol, Huawei is also a major contributor to StarLight technology research and standard development.

The core technology of Star Flash is the Polar code physical channel coding algorithm

So why does Huawei FreeBuds Pro 3 use this technology?

In fact, there has always been a pain point in Bluetooth communication technology, that is, as the audio signal transmission bit rate increases, the anti-interference ability of the audio signal will significantly decrease.

The Polar technology is designed to improve the anti-interference ability of audio Bluetooth transmission.

To give a simple example, the L2HC protocol is the fast lane, which allows all cars to drive quickly on the road, and Polar code technology is the traffic police on the fast lane. With their existence, these cars can Drive quickly and safely in an orderly manner. This is what polar code technology does.

Polar code technology increases the anti-interference ability of audio Bluetooth transmission by 2 times, and L2HC allows the transmission rate to reach CD level. Finally, Huawei FreeBuds Pro 3 achieves Bluetooth transmission with high bit rate and high anti-interference.

So, only L2HC is not enough. Polar code technology is also needed to ensure continuous lossless and silky smoothness. Original sound quality experience. This is also a key core technology that Huawei has a huge advantage over other manufacturers.

Writing to the end

In promoting the popularization of lossless audio experience, Huawei’s identity is both a leader and a promoter of the industry.

For example, Huawei is a major contributor to the formulation of L2HC standards. As early as Huawei FreeBuds Pro2 and Freebuds5, these products have been equipped with Huawei’s self-developed patented wireless audio codec format L2HC.

This time, Huawei FreeBuds Pro 3 supports L2HC 3.0, allowing wireless headsets to truly achieve CD-level sound quality from a technical basis. This can be said to be a huge revolution in the entire wireless audio industry. "Bluetooth headsets" Just listen to it” is no longer an option. On the other hand, the L2HC standard is also fully open source to the industry, which means that more audio equipment will continue to join this fast lane.

In this field, Huawei is still the undisputed leader

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