What is the difference between standard sound quality, high definition sound quality and lossless sound quality?
Standard sound quality: 128 kbps (bit rate)
HD sound quality: 320kbps
Lossless sound quality: 1411 kbps (below CD sample rate)
The first two are what we always call mp3, and the lossless music formats are mostly wave, flac, aiff, etc.
1. Size difference: 1 3 minute pop song, about 3mb for 128k, about 7.5mb for 320k, and about 30mb for lossless. (The standard sample rate is 44100 Hz, which is the same as a CD; many songs are recorded with a sample rate of 192 kHz, 96 kHz, which will be reduced to a standard 44100 Hz, 16-bit in the final mastering process )
2. Difference in sound quality: the high-frequency part of lossy music will be weakened, and listening to good monitoring headphones will feel the sense of space is reduced, in fact, the so-called music compression is to compress its bass -frequency and high frequency, so the compressed The frequency response range of music is not as wide as lossless.
Some also have popping noises. Use a professional sound card to listen to a song, well-made lossless music, the sound card will not jump red, but listen to mp3, the sound card will jump red, although it is not explosive.
Audio files can be divided into two types:
With losses and without losses.
If a song is recorded and played without compression, the hard drive space occupied by multiple songs is equivalent to a movie.
Why bother?
So the vast majority of the audio we hear is compressed.
Compression is further divided into lossless compression and lossy compression.
The so-called lossless compression is equivalent to,
A very long book
So we replaced the long and repeated names of people and places in the book with symbols,
The book is then marked with the names of people or places represented by all these symbols.
Wouldn’t this be shorter?
But even though it was hard to read, the content was not missing at all.
This is “lossless”.
The so-called lossy compression is equivalent to,
A very long book
So we use the lossless method above to compress first,
Then remove those modifiers that are not very important directly,
Even some wordy plots have been removed.
Of course, this compression is more effective.
But it would also leave the book incomplete.
This is “lossy”.
I just make a very intuitive example for your understanding.
Of course, this statement is not very professional.
And what you said about SD and HD,
It is the level of lossy compression.
The difference between SD and HD is like:
A book has just removed the description of the appearance of the passerby.
Another book directly removed the bystander’s irrelevant plot.
What would you say is the difference between the two books?
You can try to buy a good pair of headphones,
Then download HD and SD of the same song,
Compare and listen.
The difference is still quite obvious.
The difference between HD and lossless is more difficult to distinguish.
Maybe my ears aren’t sharp enough
I can’t tell the difference between 320kbps and lossless mp3 audio.
Therefore, it is recommended that the theme owner download the HD version.
The general audio website high definition refers to the 320 kbps mp3 format.
