1. Different code rates
The abbreviation of High Quality (high quality version). MP3 is compressed from CD. The higher the bit rate of compression, the smaller the loss of sound quality. The lower the bit rate of compression, the greater the loss of sound quality. The current mainstream standard bit rate is 128kbps.
192kbps and 320kbps higher than 128kbps are called high-quality music, and 320kbps MP3 is close to CD sound quality. At present, mainstream music media such as Baidu Music already provide high-quality music downloads.
2. Different sound quality
SQ (Super Quality) audio files are compressed while preserving 100% of all sound effect details of the music scene. The common formats are APE or FLAC. The difference Compared with ordinary MP3 formats, it truly achieves lossless fidelity and has near-perfect sound quality. Not only that, QQ Music has improved its background technology to ensure high-speed and smooth downloading of music, without interruption or excessive slowness in Wi-Fi or 3G environments, and the volume of audio files is compressed. Smaller, equivalent to half the size of a lossless CD, maximally saving device storage resources for users.
3. Different sizes
HQ music files are generally around 10MB, and SQ music files are usually over 20MB.
Currently, only FLAC or APE are available with super quality. Now, SQ music can be downloaded from Kugou, Kuwo, and NetEase Cloud.
Extended information:
The commonly seen MP3, WMA, and OGG are called lossy compression. As the name suggests, lossy compression is to reduce the audio sampling frequency and bit rate, and the output audio file will Smaller than the original file. Another type of audio compression is called lossless compression, which can compress the size of the audio file into a smaller size while preserving 100% of all the data of the original file. After restoring the compressed audio file,
< p>Able to achieve the same size and code rate as the source file. Lossless compression formats include APE, FLAC, WavPack, LPAC, WMALossless, AppleLossless, TTA, Tak, TAC, La, OptimFROG, and Shorten. The common and mainstream lossless compression formats currently include APE, FLAC, TTA, and TAK.WAV general CD can capture music in this format. However, since it is large in size and is uncompressed original audio, it can generally be compressed and converted into smaller FLAC or APE. Note: wav is still a lossless format, and the latter two are lossless compression formats
Reference: Baidu Encyclopedia - High Quality Music
Baidu Encyclopedia - Bit Rate