Digital cameras can be divided into several categories.

Lead: How many kinds of digital cameras can be divided into? It is a digital video format jointly developed by several famous home appliance giants. The photosensitive element of a digital camera can convert light into charge, and the charge is converted into a digital signal through an analog-to-digital conversion chip.

Digital cameras can be divided into several categories: the first category: according to storage media

1, tape type:

Refers to the digital video camera with mini DV as the recording medium, which was first developed by manufacturers above 10. High quality digital video signal is recorded by 1/4 inch metal vapor deposition tape.

2. CD:

Refers to a DVD digital camera. The storage medium is DVD-R, DVR+R, or DVD-RW and DVD+RW to store dynamic video images. It is simple to operate and convenient to carry. You don't have to worry about overlapping shooting when shooting, let alone wasting time rewinding or playback. Especially, it can be played immediately through a DVD player, which saves the trouble of later editing.

DVD media is the most secure and stable of all media digital cameras at present. It is not as easy to wear as tape DV, and it is not as demanding on shock prevention as hard disk DV. The disadvantage is that the price of DVD is slightly higher than that of tape DV, and the recording time is shorter.

3. Hard disk:

A digital camera that uses a hard disk as a storage medium. It was first introduced by JVC in 2005, using micro hard disk as storage medium.

Hard disk cameras have many advantages. Large-capacity hard disk cameras can ensure long-term shooting, so that you won't have any worries when traveling. When you get home, you can transfer the shooting materials to the computer, and you don't need complicated and professional video acquisition equipment like the MiniDV tape camera era. Simply connect to the computer through USB cable, you can easily export the material, so that ordinary family users can easily experience the fun of shooting and editing video clips.

Like CF card, micro hard disk is smaller than DVD, and its service time is the most considerable among many storage media. However, due to the short time, the hard disk DV still has many shortcomings, such as poor earthquake resistance and so on. With the further decline of prices, the number of people who need help will inevitably increase in the future.

4. Memory card type:

Refers to a digital video camera that uses a memory card as a storage medium, such as the popular "X Easy Shooting" product. As a transitional simple product, it is rare in the market now.

The second category: according to the purpose of use.

1, broadcast type number:

These models are mainly used in the field of radio and television, with high image quality and good comprehensive performance, but they are expensive, bulky, with the highest definition and the largest signal-to-noise ratio. Of course, the price of several hundred thousand yuan is not acceptable to ordinary people. For example, Panasonic's DVCPRO model above 50m and so on.

2. Professional models:

These models are generally used in professional TV fields other than radio and television, such as audio-visual education, and the picture quality is lower than that of broadcast cameras. However, in recent years, some high-end professional cameras have surpassed the old models of broadcast cameras in many aspects, such as performance indicators, and the prices are generally between tens of thousands and hundreds of thousands of yuan.

Compared with consumer models, professional DV is not only cooler and more eye-catching, but also much higher in configuration, such as using lenses with better quality and performance and larger CCD, which is more prominent in imaging quality and adaptability to the environment. For friends who pursue image quality, the surprise brought by the improvement of image quality can't be measured by money. Representative models such as Sony's DVCAM series models.

3. Consumer model:

This kind of camera is mainly suitable for home use, and it is used in non-business occasions where image quality is not high, such as home entertainment. This kind of camera is small in size, light in weight, easy to carry, simple to operate and cheap. It can be used to make VCD and DVD for personal families in low-demand occasions, and the price is generally in the order of several thousand yuan to ten thousand yuan.

If we subdivide home digital cameras, they can be roughly divided into the following categories: entry-level DV, mid-range consumer-grade DV and high-end quasi-professional DV products.

What are the working principles and characteristics of digital cameras?

The high-definition analog camera records 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 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 reproduction of the signals recorded on DV tapes can be transcribed countless times, and the picture quality will not be degraded at all, which is beyond the reach of analog cameras.

Compared with analog cameras, the size of DV cameras is greatly reduced, generally only about 1.23mm×87mm×66mm, and the weight is also greatly reduced, generally only about 500g, which greatly facilitates users, only 74.7mm×6 1.9mm×26.9mm, and the weight is only 90g compared with most mobile phones.