Is the sound quality of the Bluetooth headphones not good? Part 3
Correct use of high-quality sound codec to avoid deterioration of the sound quality of the Bluetooth connection!
With the expansion of Bluetooth, when listening to music on a smartphone such as an iPhone or Walkman, it is no longer necessary to connect a cable each time, making it extremely convenient.
But did you know that there are actually high and low quality Bluetooth connections that look the same?
Bluetooth high quality sound connection codec picture
There are several standards for high-quality Bluetooth connection methods.
However, even if the Bluetooth device supports a high-quality sound connection, if you make a mistake in pairing with the other party’s Bluetooth device, the connection may inadvertently lead to low-quality sound, so be careful.
For example, just like you feel that the sound has changed when you switch the headset from a wired connection to a Bluetooth connection, the sound quality improves depending on the connection partner even with the same Bluetooth compatible device, such as headphones, earphones, Portable speakers. , car navigation systems, car audio, etc. It can happen that it gets worse or worse.
Here, I will write about the method and precautions for connecting to high-quality sound via Bluetooth so that you can connect to Bluetooth with the best possible sound quality.・ High-quality sound codec support status list (link on page) of Bluetooth Compatible Devices.
Table of Contents
PR
What is the Bluetooth A2DP codec?
What is a codec?
First of all, what is a “codec” in general? As for, if you write it in English, it will be “codec”. When stripped, “codec = co der + DEC”, is made up of “oder”, which is a method of decoding data as a code (en).
With a Bluetooth connection, the music data is sent as a wireless signal, that is, a radio wave, but the data is compressed to transmit it efficiently when the radio wave is sent over the air. In other words, the Bluetooth codec is a method that compresses data before transmission and decompresses it after reception.
What is a high-quality Bluetooth codec?
As a Bluetooth codec, that is, a data compression method, the following four methods are a method that can achieve the necessary data compression while maintaining high sound quality, that is, a high sound quality codec.
AAC – Originally the format adopted by the iTunes Store. Widely used in Apple Bluetooth devices such as iPhone and iPod. Effectively up to 320 kbps.
aptX – Currently developed by CSR Limited, which was acquired by Qualcomm. Really up to 384 kbps.
aptX HD – Like aptX, developed by CSR Limited. Actually up to 576 kbps higher than aptX.
LDAC: developed by Sony. It is mainly used to connect high quality sound sources, such as high resolution. Really up to 990 kbps.
The higher the number, the greater the amount of data per second, so it can be said that the sound quality is higher.
