What are the lossy compression formats?

Lossy compression formats include: 1. mp3 format; 2. AAC format; 3. AAL format; 4. Ogg format; 5. divX format; 6. Xvid format; 7. jpeg format; 8. rm Format; 9. rmvb format, etc.

#The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

Lossy compression takes advantage of the human insensitivity to certain frequency components in images or sound waves, allowing a certain amount of information to be lost during the compression process; although the original data cannot be completely restored, the lost part is important Understand the impact of shrinking the original image, but in exchange for a much larger compression ratio.

Lossy compression is widely used in the compression of voice, image and video data.

Common sound, image, and video compression are basically lossy.

In multimedia applications, common compression methods include: PCM (Pulse Code Modulation), predictive coding, transform coding, interpolation and extrapolation, statistical coding, vector quantization and sub-band coding, etc. Hybrid coding is widely used The method adopted.

What are the common lossy compression formats?

mp3, AAC, ATRAC3/ATRAC3 (*.aa3), AAL (ATRACAdvancedLossless), Ogg, divX, Xvid, jpeg, rm, rmvb, wma, wmv, etc. are all lossy compressions.

The lossy data compression method is a compression method in which the compressed and decompressed data is different from the original data but very close. Lossy data compression, also known as destructive compression, compresses secondary information data and sacrifices some quality to reduce the amount of data and increase the compression ratio. This method is often used on the Internet, especially in streaming media, and in the telephony world. Often referred to in this article as codecs. It is a compression method corresponding to lossless data compression. Depending on the design of various formats, lossy data compression will have generation loss: compressing and decompressing files will bring about a gradual loss of quality.

The defects caused by lossy compression that can be detected by the human eye or human ear are called compression artifacts (en: compression artifact).

For more computer-related questions, please visit the FAQ column of the PHP Chinese website!

The above is the detailed content of What are the lossy compression formats?. For more information, please follow other related articles on the PHP Chinese website!