What are the three categories of data compression technology?

Data compression technology is divided into three categories, namely: 1. Instant compression and non-instant compression; 2. Digital compression and file compression; 3. Lossless compression and lossy compression. Lossless compression is widely used in compression of text data, programs, and image data in special applications that require accurate storage of data.

Data compression technology is divided into three major categories, as follows:

1. Instant compression and non-instant compression

Instant compression converts voice signals into digital signals, compresses them at the same time, and then transmits them instantly through the Internet. Real-time compression is generally used in the transmission of video and audio data.

Non-real-time compression is performed when needed and has no real-time nature. Non-instant compression generally does not require special equipment, just install and use the corresponding compression software directly on the computer.

2. Digital compression and file compression

Digital compression refers specifically to some time-sensitive data, which are often collected, processed or transmitted in real time.

File compression refers specifically to the compression of data to be stored in physical media such as disks, such as the compression of an article data, a piece of music data, a piece of program encoding data, etc.

#3. Lossless compression and lossy compression

Lossless compression uses the statistical redundancy of data to compress, so lossless compression The compression ratio is generally low. This type of method is widely used in the compression of text data, programs and image data in special applications that require accurate storage of data.

The lossy compression method takes advantage of the fact that human vision and hearing are insensitive to certain frequency components in images and sounds, allowing a certain amount of information to be lost during the compression process. Lossy compression is widely used to compress voice, image and video data.

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