Sampling frequency and depth of bits
What is the sampling frequency?
What are the depth and speed of bits?
The sound quality is determined by the sampling frequency and the depth of bits.
When I read the history of sampling frequency and bits frequency on the network, I flood incorrect information.
Some people think subjectively about what frequency is better. There is a definition and a physics suitable for the frequency (sampling frequency) and the bit rate.
It is not something you can guess what is better (laughs)
, so why not study the sound quality mechanism and replace it for the quality of the video?
What is the sampling frequency?
There is something similar to the speed of frames in the world of sound.
That is the sampling frequency.
The sampling frequency is an index that indicates how many times a sound is converted per second when converting an analog signal into a digital signal.
In terms of video, 24 fps has 24 photos aligned in a video of 1 second.
In terms of voice, 44,100Hz means 44,100 digital sound samples are aligned in a second sound.
The unit is Hz.
Reference source: https://pixabay.com/en/equalizer-eq-sound-level-digital-255396/
By the way, the conversion is called AD conversion (analog to digital conversion abbreviation).
I think this meaning is difficult to understand and the information is complicated.
It is said to be standard only after converting the analog signal to digital 44,100 times per second, so the human ear is strange! That’s why.
By the way, the “sampling frequency” is the “frequency of frames” in the video.
To deepen the understanding of the sampling frequency, I will replace it with a video and continue with the story.
The frame rate of a video is called FPS (frames per second) and is expressed using the unit of how many photos are displayed per second.
And the video is more fluid at 30 fps and 60 fps than at 24 fps.
In other words, the greater the sampling frequency, the softer the sound will be.
The sound is the same and 48,000 Hz is softer than 44,100 Hz.
Before talking about what sound he prefers, first understand what sound the highest sound quality has by definition.
This is important.
By the way, it is important to understand the difference between 44,100Hz and 48,000Hz by making images.
VOOK article link “The difference between 44,100 Hz (music industry) and 48,000 Hz (video industry) that you get to know”
Did you know the sampling frequency?
What are the depth and speed of bits?
Remember only two more terms.
That is “depth of bits” and “bit speed”.
Be careful because names are similar but not equal.
These three words are simply expressed like that.
Sampling frequency (Hz) x Bit depth (bit) x Number of channels = BITS speed (BPS)
The best-known CD bit rate is 44,100 Hz x 16 bits x 2 channels (stereo sound) = 1411200 bits = 1411.2 Kbps
