1. Bit rate:
Bit rate refers to the number of bits transmitted per second, which is divided into 8bit, 16bit, 24bit, and 32bit. The unit is bps (Bit Per Second). The higher the bit rate, the more data is transmitted per second, and the clearer the picture quality. The bit rate in sound refers to the amount of binary data per unit time after converting an analog sound signal into a digital sound signal, which is an indirect measure of audio quality.
2. Sampling rate:
The audio sampling rate refers to the number of times the recording device samples the sound signal in one second. The higher the sampling frequency, the more realistic and natural the sound will be. In other words: the sampling rate is good and the number of times is high, which means that the stored data is finer. To give a simple example: a certain period of time, such as 1hz, is one syllable, and 100hz is also 100 syllables. The more recorded nodes, the smaller the more accurate.
On today’s mainstream acquisition cards, the sampling frequency is generally divided into 8000Hz, 11025Hz, 22050Hz, 32000Hz, 44100Hz, 47250Hz, 48000Hz, 50000Hz, 50400Hz, 96000 or 192000Hz, and 320000Hz.
So what are the practical applications of bit rate and sample rate? Here is an example for you.
The current bit rate is divided into 8bit, 16bit, 24bit, 32bit. The TVs we use are usually 16bit. In addition to this, there are Bluetooth 5.0 headphones, most of which are 16bit, 44.1 or 48khz. But now there are also APTX HD that can prompt 24bit, 96khz fever audio, such as the following semi-in-ear flat-head Bluetooth headset APTX HD.
Today’s computers basically use 16-24bit, between 44.1-192khz; in fact, 24bit 192khz is already the standard for desktop-level heating music, but many enthusiasts still pursue 32bit 320khz, hoping to have better results.
In general: “The higher the bit rate, the more data transmitted per second, and the clearer the picture quality; the higher the sampling frequency, the more realistic and natural the sound reproduction, and the finer the data stored.
The above is the knowledge sharing about bit rate and sampling rate, I hope it will be helpful to everyone!