Bluetooth – the most convenient way to listen to music wirelessly.
Bluetooth (Bluetooth) is believed to be the most familiar wireless song transmission method.
Although it is quite convenient to connect, it is a bit inferior in terms of sound quality compared to AirPlay, Chromecast, DLNA, Play-Fi, and other technologies that use network methods to stream music. However, with the version upgrade and Bluetooth technology, different codes have been introduced so that this convenient and fast connection method can also provide better and better sound quality.
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Bluetooth (Bluetooth) is believed to be the most familiar wireless way of streaming songs. Although the connection is quite convenient, the sound quality is slightly lower. However, with the version upgrade and Bluetooth technology, different codes have been introduced so that this convenient and fast connection method can also provide better and better sound quality.
Version 1.0 to 5.2: Reduce Power Consumption, Increase Bandwidth, and Increase Features
This technology was developed by the telecommunications company Ericsson in the 1990s. After almost 30 years of development, Bluetooth has undergone many version changes. Bluetooth uses a radio frequency of 2.4GHz, from the initial Bluetooth 1.0 with a slow speed of 723.1kbps, to Bluetooth 3.0, it has increased considerably to 24Mbps, which is enough to transmit more data and higher quality music; the later Bluetooth 4.0, 4.1, 4.2 are It is a very popular version with much improved functions. Among them, version 4.0 adds Bluetooth low energy technology, version 4.1 adds smart connection and supports connection of multiple devices, version 4.2 can connect to the Internet, and even the current Bluetooth-enabled devices are quite similar and part of them they still use Bluetooth version 4.x.
Bluetooth (Bluetooth) is believed to be the most familiar wireless way of streaming songs. Although the connection is quite convenient, the sound quality is slightly lower. However, with the version upgrade and Bluetooth technology, different codes have been introduced so that this convenient and fast connection method can also provide better and better sound quality.
The AVR-X2600H amplifier released by Denon in 2019 still uses Bluetooth version 4.1, which is sufficient to support two-way Bluetooth and other functions.
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Bluetooth 1.0
The original version of Bluetooth had quite a few compatibility issues, and was prone to crashing when connecting and leaking data. The speed of the later version 1.2 was increased to 723.1kbps, and the transmission distance was only 10 meters.
Bluetooth 2.0
With the incorporation of “skip-free narrow-band channel” (skip-free narrow-band channel) technology, there is no need to exchange feedback signals with each Bluetooth-connected device, so Bluetooth signals and data can be stream to multiple devices.
Bluetooth 3.0
The data transmission speed increases up to 24 Mbps, which is 8 times that of Bluetooth 2.0, which is enough to transmit high-quality music signals. The current conventional Bluetooth transmission speed is probably at this level. In addition, the power control has been improved to significantly reduce power consumption when idle.
Bluetooth 4.0
Although the speed remains the same as in 3.0, the transmission distance has been greatly increased to 50 meters, or even up to 100 meters, and three modes of “Bluetooth Low Energy”, “Traditional Bluetooth” and “Bluetooth” have been incorporated. Of high speed”. 4.2 is the most popular version of Bluetooth.
Bluetooth 5.0
It supports indoor positioning and navigation functions, combined with Wi-Fi to achieve indoor positioning with an accuracy of less than 1 meter. It is possible to receive unmatched data such as advertisements, location information, etc., the transmission speed increases to 48 Mbps, and many underlying optimizations have been made for the Internet of Things.
Bluetooth 5.0, released in 2016, doubles the bandwidth to 48 Mbps and supports features like indoor navigation and positioning. The recently announced Bluetooth 5.2 in 2020 adds LE Audio technology, running on Bluetooth Low Energy, which allows headphones to connect to multiple audios, or multiple sets of headphones to connect to one audio, using the LC3 (Audio Codec). low complexity communication
