What is a bit rate? What if it is tall?
This time, I will explain the bitrate briefly, in an easy to understand way and roughly.
* It is an individual subjectivity.
What is a bit rate? It seems difficult and troublesome … I think you!
If you are not knowledgeable about bit rates, even if you present a network camera or NVR …
“The image from the network camera is frequently interrupted …”
“The NVR is causing an unexplained reboot …”
Be careful because things will happen.
Of course, in addition to the introduction of the surveillance camera system, it is an important word on the net, so check it out!
If you don’t know the bit rate, the video may be interrupted or the NVR may reboot …
Table of Contents
What is a bit rate?
What if the bit rate is high?
Disadvantages of high bit rate!
resume
What is a bit rate?
Bit rate is the amount of data that can be sent and received per second. The unit is bps (bits per second). This unit is used to indicate how many bits can be transferred in 1 second (per second).
For example, at 1 bps, 1 bit of data can be transferred per second.
At 10bps, it can transfer 10 bits of data per second.
If you want to know more about “bit”, check out this article too!
What if the bit rate is high?
High bit rate = a lot of data can be transferred per second
.
Sounds like a good thing.
The network cameras managed by my company send the captured video data to a computer for viewing over the network.
If you want to see the video, you want to see a beautiful video that moves sharply with high image quality, right?
However, the amount of data in a beautiful image is surprisingly large …
In such a case, if the bit rate is high, a lot of data can be transferred per second, so you can deliver beautiful images to your computer. On the other hand, if the bit rate is low, there is not much data that can be transferred per second, so the image quality will be low and the image will be choppy.
“So the bitrate should be high anyway!”
… That is not the case.
In fact, in a surveillance camera system, there are the following disadvantages to increasing the bit rate.
Disadvantages of high bit rate!
Transferring a large amount of data increases the load on the network line and equipment.
There is an upper limit to the bit rate that can be transferred depending on the network environment. This depends on the LAN cable you are using, the performance of the hub, etc., but it will be difficult so I will skip it. Just think that there is an upper limit for the bit rate depending on the environment.
“So what happens if it exceeds the upper limit?”
In the case of video from a network camera, the connection is often dropped. If you exceed the upper limit, the line will be punctured and you will lose connection with the camera. The image may be interrupted for a moment, but if it is too bad, you will not be able to see the image from the camera at all.
If this happens, it will be very troublesome …
Also, if the bit rate is high, a large amount of data will reach the browsing computer and the recording NVR. When a lot of data arrives, the computer or NVR will not be able to process the data and abnormal operation (reboot, etc.) may occur.
Therefore, the System Kay NVR has decided the maximum bit rate that can be supported as a specification. The bit rate that the entire NVR can process and the bandwidth limit per channel are described in the specifications as performance.
Also, video with a high bit rate has a large data capacity. Therefore, there are disadvantages such as using a lot of hard disk capacity when recording.
resume
Bit rate is the amount of data that can be sent and received per second.
Bps (bits per second) is used as a unit
The higher the bit rate, the better the image can be delivered.
If the bit rate is high, communication is likely to be interrupted, which has the disadvantage of charging the device.
