EDR (enhanced data rate) is the abbreviation of enhanced rate in Bluetooth technology. It greatly improves the data transmission rate of Bluetooth Technology to 2.1 Mbps.
It is three times the current bluetooth technology. Therefore, in addition to more stable audio stream transmission and lower power consumption, you can also take full advantage of the bandwidth advantage to connect multiple Bluetooth devices at the same time. Currently, the number of such instances reaches 710.
And other mobile phones have begun to support the Bluetooth EDR technology.
EDR emerged as a supplement in the specification of ipvth2.0. It correctly defines the change of the Adjustment Technology and the additional packet type, which enables it to transmit at a rate of 3 Mbps. therefore, we usually see the "Bluetooth Core Specification Version 2.0 + EDR" statement.
The actual situation is: currently, no Bluetooth application needs to transmit more than 1 Mbps. for a high-quality stereo data stream, subband codec; SBC codec must be used, and a maximum of kbps is required.
However, as Bluetooth devices become increasingly popular, users may use multiple Bluetooth devices at the same time, especially in computer environments, you can have the mouse, keyboard, earphone, mobile phone, PDA, printer and other devices to work at the same time. EDR provides an extra bandwidth for Bluetooth RF so that all devices have a satisfactory transmission rate.
If you want to listen to a high-quality stereo sound, you need a data transfer rate of 345 kbps instead of 237 for medium-quality audio.
Kbps. Audio streams with high sound quality occupy 53% of the bandwidth, plus the 22% of the bandwidth required by the mouse and keyboard, with only 25% of the bandwidth left, for retransmission
This is not enough. In addition, if the communication interference is serious, 25% of the bandwidth will be less suitable for use.
If EDR is used, the preceding problem can be solved. In the EDR communication environment, the mouse and keyboard still maintain a maximum bandwidth consumption of 11%, but high-quality audio streaming now only occupies 18% of the Frequency
Therefore, the bandwidth can be 60%. Even in the case of severe interference, the communication efficiency can be easily maintained to an acceptable level. This can also provide sufficient bandwidth for other additional applications, such
Print files, or synchronize data (synchronizing data ).
In addition to audio streams with high sound quality, EDR can also help reduce power loss. The power required by the Bluetooth RF system is in active mode.
Mode. Because EDR has increased the data transmission rate by three times, Bluetooth RF is in working mode and now only needs 1/3 of the time, and the required power is only
In the past 1/3.
EDR 100% is compatible with Bluetooth 1.2. Backwards
Compatibility) is always emphasized when developing EDR. Bluetooth Network allows devices with EDR functionality and with standard transfer rate (1
Mbps. The new Regulator design is also compatible with the standard transfer rate, so both parties can receive signals from the other party. This means that when designing products with EDR features, it will not be more blue than the design
Teeth version 1.2 is complex
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