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What is the association between the video encoder and video decoder?

What is the association between the video encoder and video decoder?

What is the association between the video encoder and video decoder?

The encoder is used in the previous analog monitoring system to be transformed into a network monitoring system. It is said that the network camera = analog camera + encoder, if it is an analog surveillance camera, if you want to transform into a network monitoring system, you need to use the encoder, if it is The network surveillance camera does not need an encoder; the decoder is used for the display screen, which decodes the network signal into an analog signal and displays it on a large screen, which is the inverse process of the encoder.

 

First, let's take a look at the concept of what is a video encoder?

I think that as long as it can convert analog video signals into digital network IP signals, they can be collectively referred to as video encoders. It can include network hard disk recorders (video capture card industrial and embedded), network video servers, network cameras, video coding. Device. The difference between them is nothing more than appearance, function and price, so how to choose depends on the needs of the site and the budget.

 

Secondly, if the points are scattered and the number of roads is large, you can consider using a network hard disk recorder to reduce the overall cost. However, if the hard disk recorder cannot be placed or unattended, you can consider the video server or encoder at this time. There are a few sporadic points, and the dispersion is uneven, and the distance is far away. At this time, it is not necessary to consider the network camera, and it can also be mixed and matched in various ways. In summary, there are many types of equipment that can be selected, but it must be suitable for the on-site environment and reduce costs.

 

The video decoder is under the control of the host, which can cause the front-end device to generate corresponding actions. It is a front-end device that provides driving power for controllable devices such as pan/tilt and zoom lenses and communicates with control devices such as matrix decoders.

 

Usually, the decoder can control the pan, tilt, focus, aperture, and control of the wiper wiper, camera power, lighting, etc., and also provide several auxiliary function codes. The device and the decoder can't be rented. It is relatively simple to join the monitoring system. There is no pan/tilt and zoom camera, and no signal conversion is needed. It is not needed. Some encoders are collected in the monitoring host. A host with an encoder does not require an additional encoder.