From AirPods 1 to AirPods 2 generation, then to AirPod Pro, Apple has done a good example. If the smartphone to discard the button is Apple to create a smartphone era, then abandon the headphone cable, combine the charging battery and wireless headphones is another great innovation of Apple to create TWS headphones.
In 2019, the TWS headphones really broke out. Whether it is traditional speaker manufacturers or Internet mobile phone manufacturers, they have been involved in the TWS headset, similar, external, and different domestic TWS headphones products are full in the market. Although comparatives of the TWS earphone products of AirPods have a certain gap, 1/4, or even 1/10 price is still allowed to have a considerable market in these domestic TWS headphones, from this matter, whether users, terminals Vendors are also unable to benefit from chip vendors.
If you leave the brand, the exterior of each product, the domestic TWS headset is equipped with his unicorn A1 chip in addition to Huawei's latest product. Most manufacturers' chips mainly come from Taiwan's UNADA and the high pass of the United States, and through the market Some TWS headphones disassembled, you will further find that its solution is based primarily based on two products from AB1526 and CSR8675. What is the magic of these two Bluetooth SOCs, why are the vast majority of TWS headphones use these two product solutions?
AB1526 is a product named Duota Technology, which is a fully integrated single-chip, supports Bluetooth 4.2 dual mode authentication, supports HFP1.6 and AAC decoders, and supports custom dual MIC broadband voice , Good noise reduction and echo cancellation function can be obtained. As can be seen from the hardware system block diagram below, the AB1526 embedded serial flash, more flexibly supports customer software upgrades, and third-party software transplants. AB1526 provides higher performance and voice and music quality in most Bluetooth audio applications with optimized MCU structures, interface layouts and better DSP algorithms.
In addition, the AB1526 uses a very small BGA package type and only requires a few external components to form a TWS headset scheme, so it can be applied to an ultra-small headset application. The AB1526 supports "airostereo", two speakers can be connected to each other, play the left channel in a speaker, play the right channel in another speaker, as a wireless stereo system. AirOStereo allows End users to get excellent stereo experiences without wired connections. The AB1526 also supports "airoshare", which allows music from an audio device to another, allowing users to easily share music from the same audio source.
The CSR8675 is the product of the UK chip vendor CSR, the CSR8670 is the high-end single-chip solution in CSR, with high integration, high-spirited wireless audio solution, customers can take advantage of their advanced features: such as "Support up to 6 digital microphones and capacitive touch controllers" to develop a variety of innovative consumer audio devices. With a small PCB scheme, the CSR8670 helps to design a more smooth touch interface by integrating the support of the capacitive touch sensor, and the CSR8670 helps to design a more smooth touch interface. The touch panel can be set to slide or scanning operations, which makes it easy to control the individual applications through software. And the most unexpected thing is that Qualcomm has announced that the CSR8670 is in line with the Bluetooth 5.0 standard, which can be said to be seamlessly upgraded.
While AB1526 and CSR8670 belong to a single-chip Bluetooth scheme in TWS earphone applications, we can distinguish between individual subtle below.
For example, the AB1526 has a higher reception sensitivity than CSR8670, but under equivalent conditions, the CSR8670 has higher transmit power; in storage, both supports almost internal storage, but CSR8670 also supports additional external storage expansion, this pair If you need more complex Bluetooth audio applications, the CSR8670 will be more advantageous; in terms of battery charging management, the AB1526 is more better, supporting higher charging current and supports more voltage output, but in the package Aspect, AB1526 has only one 5mm * 5mm BGA package. However, if you come back, if you synthesize the application function of TWS headphones, the gap between the two is not very obvious. It may be the only determination of the manufacturer's plan to choose the stability of the source, and the Bluetooth 5.0 is in full swing, both The previous balance is slightly tilted, it is originally used as only Bluetooth 4.2 Some power can't, the good news is the corresponding upgrade product, such as the AB1526 AB1526P can support BT 5.0, and the CSR8670 is directly Note on Qualcomm Ming Dynamic Bluetooth 5.0, it should be supported by software or firmware, this is better than AB1526, but also high-pass not only contains CSR's Bluetooth solution, but also its own Bluetooth solution, medium high-end QCC300X series, high-end QCC5100 The series, perhaps the advantage of leaving the United Arabia is the price and supply.
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