What are the classifications of digital cameras?

1. Broadcast-grade models:

These models are mainly used in the field of radio and television, with high image quality and comprehensive performance, but they are expensive and bulky, with the highest definition, the largest signal-to-noise ratio and the best image quality. Of course, the price of several hundred thousand yuan is not acceptable to ordinary people. For example, Panasonic's DVCPRO models above 5m, etc.

2. Professional-grade cameras:

These models are generally used in professional TV fields other than radio and television, such as audio-visual education, and the image quality is lower than that of broadcast cameras. However, in recent years, some high-grade professional cameras have surpassed the old models in many aspects, such as performance indicators, and the price is 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 the use of lenses with better quality performance and larger CCD size, 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 at all. Representative models such as Sony's DVCAM series models.

3. Consumer-grade models:

These models are mainly cameras suitable for home use, which are used in non-business occasions with low image quality requirements, such as home entertainment, etc. These cameras are small in size, light in weight, easy to carry, simple to operate and cheap in price. It can be used to make VCD and DVD of personal family in occasions with low requirements, and the price is generally in the order of several thousand yuan to ten thousand yuan.

if we subdivide the 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.

2. Classification according to storage media

1. Tape type:

It refers to a digital video camera with Mini DV as the recording medium, which was first jointly developed by more than 1 manufacturers in 1994. Record high-quality digital video signals through a 1/4 inch metal vapor deposition tape.

2. CD-ROM:

refers to a DVD digital video camera. The storage medium is DVD-R, DVR+R, or DVD-RW, and DVD+RW is used to store dynamic video images. It is simple to operate and easy to carry, and you don't have to worry about overlapping shooting during shooting, let alone wasting time in rewinding or playback. In particular, it can be played immediately through a DVD player, which saves the trouble of post-editing.

DVD media has the highest security and stability among all media digital cameras at present. It is neither as easy to wear out as tape DV, nor as demanding as hard disk DV for shock prevention. The disadvantage is that the price of DVD is slightly higher than that of tape DV, and the time for recording is relatively short.

3. Hard disk:

It refers to a digital video camera with a hard disk as the storage medium. It was first introduced by JVC in 25, 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 no longer need the complicated and professional video acquisition equipment as in the era of MiniDV tape camera. You can easily export the materials just by connecting with the computer through USB cable, so that ordinary family users can easily experience the fun of shooting and editing video films.

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

4. Memory card type:

It refers to digital video cameras that use memory cards as storage media, such as the popular "X Easy Shooting" product. As a transitional simple product, it is rare in the market now.

3. Classification according to the type and number of sensors

1. Sensor type: CMOS and CCD

CCD: Charge Coupled Device, which is made of a high-sensitivity semiconductor material, can convert light into charge and convert it into digital signal through an analog-to-digital converter chip.

CMOS: Complementary metal-oxide semiconductor, like CCD, is a semiconductor that can record light changes in digital cameras.

at the same resolution, CMOS is cheaper than CCD, but the image quality produced by CMOS devices is lower than CCD. So far, most consumer-grade and high-end digital cameras on the market use CCD as sensors; CMOS sensors are used in some cameras as low-end products, but some high-end products also use special CMOS as light sensors, such as several high-end CMOS models of Sony.

2. number of sensors: the number of single CCD and 3CCD

image photoreceptors is the number of CCD or CMOS for digital cameras. Most digital cameras use a single CCD as their photoreceptors, while some middle and high-end digital cameras use 3CCD as their photoreceptors.

a single CCD means that there is only one CCD in the camera and it is used for photoelectric conversion of brightness signal and color signal. Because a CCD completes the conversion of brightness signal and chroma signal at the same time, the captured image can not meet high requirements in color reproduction.

3CCD, as its name implies, means that a camera uses three ccds. We know that if light passes through a special prism, it will be divided into three colors: red, green and blue, and these three colors are the three primary colors used in our TV. Through these three primary colors, all TV signals including brightness signals can be generated. If a CCD is used to receive each color and convert it into an electrical signal, and then an image signal is generated after circuit processing, a 3CCD system can be formed, which can display the primary colors of the image almost intact, and there will be no color error caused by camera deduction.