What does decoder mean?

A decoder is a device that restores information from its encoded form to its original form, that is, a hardware and software device that can decode and restore digital video and audio data streams into analog video and audio signals; in multimedia On the one hand, the encoder mainly compresses the analog video and audio signals into data encoding files, while the decoder converts the data encoding files into analog video and audio signals.

The operating environment of this tutorial: Windows 10 system, Dell G3 computer.

What does decoder mean?

A decoder is a hardware/software device that can decode and restore digital video and audio data streams into analog video and audio signals. Encoders such as mpeg4 for video, mp3, ac3, and dts for audio can compress and store the original data, but these are still commonly used encoding formats, and there are also some professional encoding formats that are basically not used by ordinary families. In order to play back these videos and audios on home devices or computers, decoding software is required, generally called plug-ins. For example, the mpeg4 decoding plug-in ffdshow, the ac3 decoding plug-in ac3filter, etc. Only your computer with various decoding plug-ins installed can play these images and sounds. In terms of multimedia, the encoder mainly compresses the analog video and audio signals into data-encoded files, while the decoder converts the data-encoded files into analog video and audio signals.

A decoder is a device that restores information from its encoded form to its original form. When the encoded data is lost, staff can use the decoder to restore the initial settings, which is also easily used by criminals. In some unsupervised banks, criminals install their own "decoders" on the access control card swiping system, and depositors swipe their cards. When you enter, your bank card information is stored on their decoder. At the same time, they installed cameras on ATM machines to capture depositors' bank card PINs. Once they steal the bank card information and password, they pass it to their accomplices through the Internet, decipher it and "clone" it, and then use the copied "clone card" to withdraw money in another place.

The decoder is an important front-end control device. Under the control of the host, the front-end device can take corresponding actions. Decoders, known abroad as receiver/driver (Receiver/Driver) or remote control equipment (Telemetry), are front-end equipment that provide drive power for controllable equipment such as pan/tilts and zoom lenses and communicate with control equipment such as matrices. . Generally, the decoder can control the up, down, left and right rotation of the pan/tilt, the zoom, focus, aperture of the zoom lens, and control of equipment such as protective cover wipers, camera power, lights, etc. It can also provide several auxiliary function switches. , to meet the actual needs of different users. High-end decoders also have preset and tour functions.

Decoders are divided into software decoders, hardware decoders and wireless decoders

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