What's the difference between DV and digital camera?

DV is the abbreviation of English Digital Video, which means digital camera.

DV can also be translated into "digital video", which is a digital video format jointly developed by many famous home appliance giants such as Sony, Panasonic, JVC, Sharp, Toshiba and Canon. However, in most cases, DV stands for digital camera.

The biggest difference between a digital camera and a traditional video camera is that it has a screen that can browse pictures in time. This screen is called the display screen of a digital camera, usually a liquid crystal display. At present, the LCD screen size of digital cameras is 2.5 inches or 3.0 inches.

The commonly used LCD of digital camera is TFT. What is TFT? Firstly, it includes polarizer, glass substrate, thin film transistor, orientation film, liquid crystal material, light guide plate, color filter, cathode fluorescent lamp, etc. For LCD screens, backlight is the light emitted by fluorescent tubes. These light sources will first pass through the polarizing plate and then through the liquid crystal. At this time, the arrangement of liquid crystal molecules will change the angle of light passing through the liquid crystal. When using LCD, we find that we can see different colors and contrasts at different angles. This is because most of the light from the screen is vertical. If we look at an all-white picture from a very oblique angle, we may see black or color distortion.

The LCD of digital camera is very expensive and fragile, so users must be careful when using it, and usually need to do maintenance work.

Compared with analog cameras, DV has the following outstanding features:

High definition. As we know, analog cameras record analog signals, so the image clarity (also called resolution, resolution or resolution) is not high. For example, the horizontal resolution of VHS camera is mainly 240 lines. It is better to mention that the Hi8 model has only 400 lines. DV records digital signals, and the horizontal resolution has reached 500~540 lines, which is comparable to professional cameras.

The color is purer. The bandwidth of chroma and brightness signals of DV is almost six times that of analog cameras, and the bandwidth of chroma and brightness is one of the most important factors to determine the image quality, so the color of images taken by DV is more pure and gorgeous, reaching the level of professional cameras.

Lossless replication. The signal recorded on DV tape can be transcribed countless times, and the picture quality will not be degraded at all, which is beyond the reach of analog cameras.

Small size and light weight. Compared with analog cameras, the size of DV cameras is greatly reduced, generally only about 123mm× 87m× 66mm, and the weight is also greatly reduced, generally only about 500g, which greatly facilitates users, and the size is only 74.7mm×6 1.9mm×26.9mm, and the weight is only 90g, which is lighter than most mobile phones.

When shooting, users can watch the moving image to be shot through the LCD screen of DV, and they can see the shot moving image immediately after shooting. Through DV, the captured moving images can be converted into digital signals and stored in DV band together with the sound signals recorded by the microphone.

DV can be connected to a computer, read the contents of the DV tape, and then post-process these contents, such as editing, or carve them into VCD or DVD for storage.

DV can also be connected to a TV, which can not only read the contents of DV tapes, but also record TV programs.

Pixel is the most important technical index of DV. The higher the pixel, the higher the image resolution. The lens of DV can be divided into CCD and COMS.