How to choose a streaming camera?


How to choose a streaming camera?

1. Classification of Streaming Cameras

Cameras are mainly divided into two types according to different principles: CCD (Charge Coupled Device) cameras and CMOS cameras.

CCD is also called an electrical coupling device. The light reflected from the object to the camera is focused on the CCD photosensitive chip through the lens.

The photosensitive chip accumulates the corresponding charge according to the intensity of the light, and generates an electrical signal representing the image through periodic discharge.

CMOS cameras are actually similar to CCDs, and they are also devices that convert light into electrical signals.

The difference between these two cameras is that the scanning method of the image is different. The CCD adopts a continuous scanning method, that is, it only waits for the last pixel to be scanned before zooming in; each pixel of the CMOS sensor has a charge that is amplified into a signal converter.

Therefore, the power consumption of CMOS is smaller than that of CCD. Because CMOS has low power consumption, is cheaper than CCD, and the image quality meets the requirements, most cameras currently on the market use CMOS sensors.

2. The resolution of the streaming camera

The other most important parameter of the streaming camera is the resolution, which is the clarity we all talk about every day.

Resolution (pixel = resolution long value × resolution width value, such as: 640×480=307200, which is 300K pixels.

The camera pixels are as follows:

0.3MP= 640×480, support 320×240 downward

1MP=1024×768, downward support 720×480, 640×480, etc.

1.3MP= 1280×1024 (although it exceeds 720P, but this is a non-standard high-definition resolution)

720P= 1280×720 (this is a standard high-definition resolution, the most entry-level, with 920,000 pixels), about 0.9MP.

1080P= 1920×1080 (this is standard full HD, with about 2MP)

I think some people will say, what about cameras with tens of millions of pixels? In fact, that is not the real pixel of the camera. It is another parameter of the camera—interpolation pixel, that is, the pixel of the camera after being improved by software. This parameter has no practical significance, and is only used for business promotion.

So how to choose the camera for streaming?

For live streaming, the higher the pixel, is better.

1) The quality of the network speed will determine the transmission of the image. A 2MP camera requires a minimum network speed of 2G to transmit images. The conditions for this transmission speed are still relatively high.

2) Because the video resolution of various live broadcast platforms is limited, so when you choose a streaming camera, don't blindly pursue clarity. It is recommended that if you decide to engage in the live broadcast industry, then choosing 1080P camera can basically meet the requirements, and it is also compatible with 720P camera downwards.

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