How many megapixels does a reporter's professional camera have? What is its function?

Let's put it this way: Emergency cameras are generally 3cd photosensitive elements. The camera used by county-level TV reporters is generally 6.5438+0.3 million pixels. The principle of brother TV upstairs is still very clear, but it doesn't answer the landlord's question.

Professional TV interviews use broadcast-level cameras. They are divided into ENG and EFP modes.

ENG is a TV news program. It uses a single camera and a single video camera. The camera used is a portable camera. Usually, Sony BETACAM SX, MPEG IMX, etc. are used in the standard definition field of broadcast level. Panasonic has DVCPRO 50 and so on.

The relay car is an ESP system, which is made for electronic scenes. Usually, programs are produced directly by multiple cameras through switching stations.

The biggest difference between broadcast level and amateur level is the difference of image quality, which is distinguished by CCD (single CCD and three CCD), compression ratio and code stream.

At present, the mainstream recording medium is still magnetic tape. After the video tape is shot by the camera, it is edited by the camera and video recorder, or the camera is directly input into the computer for editing. This is the difference between linear editing and nonlinear editing.

At present, most signals are transmitted through video cables and audio cables. Both the player and the video recorder have standard video interfaces. The video interface is a standard Q9 interface, not a civil plum blossom interface. The audio interface is a Canon interface.

Television stations use broadcast-grade cameras. Generally, domestic DV requires pixels, and professional machines pay attention to "horizontal resolution". The so-called "horizontal resolution" means that when the video signal shot by the camera needs to be played on TV, it needs to be converted into a unit with the same quality as TV. The picture definition of TV is based on horizontal definition. Generally speaking, we can divide the picture on TV into many "stripes" horizontally. The finer the division, the clearer these pictures are, and the more numbers there are in the horizontal lines. This unit is "TVLine", also called line. The signals recorded by digital cameras on digital tapes, which are played on TV, are also calculated by line.

General digital cameras are marked with horizontal resolution, which is generally equal to or higher than 500 lines. And we see some Canon digital cameras, which indicate that PAL TV line 625 has a nominal vertical resolution. In fact, excluding 50 lines inversion, the actual effective vertical resolution is 575 lines. The horizontal resolution can reach up to 575x4/3=766 lines. But a major factor limiting the number of lines is bandwidth. Empirical data show that 80 lines /MHz can be used to calculate the number of TV lines that can be reproduced. For example, a bandwidth of 6MHz can pass the horizontal resolution of 480 lines. Low-end home video recorders (such as VHS) have a resolution of up to 240 lines, while high-end home video cameras (such as S-V) and digital video cameras record in digital signal format with a resolution of over 500 lines.