What is the name of the camera in your hand?

It should be a hand-held camera! Portable is DV in our life.

Photography and video recording are different concepts. Photography, commonly known as photography, is static and video is dynamic. In our words, it should be: video ! !

The gap between professional level and non-professional level:

Compared with professional cameras, especially with broadcast cameras or high-definition cameras, DV cameras are small in size, cheap in price and low in resolution. My personal contact is Panasonic 180A broadcast camera, which is small in size, low in price, light and flexible, and suitable for ordinary film and television lovers. BetacamSP, DVCam, and DVCPro are expensive and bulky, but they are naturally more professional and have better picture quality when you get what you pay for. Let's talk about their differences in detail.

1. The image resolution is high. DV cameras generally have more than 500 lines, VHS cameras have 200 lines, S-VHS cameras have 280-300 lines, and 8 mm cameras have about 380 lines.

2. The bandwidth of color and brightness is 6 times higher than that of ordinary cameras. The bandwidth of color and brightness is the primary determinant of image accuracy, so the color is extremely pure and reaches the professional level.

3. It can be copied infinitely without loss of image.

Compared with professional cameras:

The structure of DV camera is basically the same as that of top digital compressed video recording systems such as DigitalBetacam(DB). DV and DB are both component formats, which encode luminance (Y) and two chrominance (R-Y and B-Y) signals on magnetic tape respectively.

DV uses the sampling rate of 13.5MHz (the same as DB), but DB uses 4: 2: 2 coding to increase color fidelity, and DV uses 4: 1: 1 coding. DB adopts 10 bit coding to improve signal-to-noise ratio; DV is 8 bits. DigitalBetacam generally adopts the spatial compression ratio of 2: 1 (8-bit sampling); And DV is 5: 1. DV obtains its partial compression ratio by inter-field (not inter-frame) compression of basically inactive video images. Because inter-field compression makes the amount of data per frame variable, and DV requires a fixed data rate, adaptive inter-frame compression is needed. With the increase of active parts in the scene, the spatial compression ratio will also increase (and vice versa).

Compared with DVCam and DVCPro:

DV, DVCam and DVCPro actually use the same compression method and recording format. The only difference is the track pitch of DVCam (15 micron) and the tape speed (28.22 mm/s). Sony believes that this track spacing is necessary for linear editing of frame accuracy. DVCPro uses optional linear tracks 1 and 2 for audio insertion signal and control track respectively. Panasonic believes that the track width of 18 micron and the use of MP cassette can provide the positioning accuracy and media durability required by traditional linear editing applications. At the same time, DVCPro also provides 4-speed transmission.

Compared with BetacamSP:

Most video technology experts believe that DV format can be compared with analog BeatcamSP. The signal-to-noise ratio of DV video is better than that of Betacamps (565438+54dB), and the brightness bandwidth of DV is higher than that of Betacamps (4. 1MHz). However, in fact, the professional Betacamps camera is better than DV with CCD, and the price of Betacamps camera is at least SonyDCR-VX 1000. Most professional interchangeable lenses (Fuji Dragon, Canon) are more expensive than the whole set of DCR-VX1000. They are directly compressed into DV, but to achieve the image quality of BetacamSP, you need a professional digital camera with DV interface. In any case, most experts think that DV is very "value for money" compared with BetacamSP P.

DV video post-production:

The combination of DV and FireWire technology can bring considerable benefits to video applications. In order to better understand the potential of this technology, let's first look at the basic ways of video post-production. First of all, the creative use of materials often means adding special effects and other methods that are much more complicated than direct and simple hard cutting. This also includes modifying the original material taken by the camera. When simulating video, this modification will lead to loss, because copying video means losing some data. In a digital editing system, data must be "unpacked" before a device can access each pixel of a video and enlarge them. DV hardware adopts hardware ASIC to encode and decode, which has obvious advantages over the solution based on pure software.

1 and ccd have many advantages. Ccd size, professional is relatively large.

2, the lens.

3. Difference of signal-to-noise ratio

1, the equipment you mentioned is called a sports camera;

2. The popular brand abroad is gopro；; Domestic millet sports camera is also good. Generally, there are support hooks or brackets, which can be installed on helmets or bicycle handlebars.

What kind of camera is this? It's very mini in your hand.

Mini DV is mini dv. Mini DV(MINIDV) mainly uses memory cards, and the most common ones are SD and MMC cards to represent mini DV. Therefore, digital cameras equipped with CMOS are generally cheap, small in size, low-end products, and the imaging quality is not high. Because of its small size, most of them have no optical zoom function. The recording medium used by mini DV is generally a media card, and the recorded file format is a compressed format. The recording system belongs to dual-channel recording and has static shooting function. This mini DV is much lighter than a video camera, which is very suitable for those who are avant-garde and afraid of weight.