Can I ask about the history of 720P and 1080P?

The definition of film has always been very high, but TV did not have the conditions for 1080P at that time. It does not mean that film cannot reach 1080P. Usually blockbusters are shot with 35mm film, so 35MM How big is the film? Let me tell you that civilian film is usually 35MM (if you look through the old negatives at home, they are usually 35mm). So now digital SLR cameras already have full frame (full frame means the size of the photosensitive chip and The photosensitive size of 35mm film is the same, which is 36*24MM).

To put it simply, if each piece of 35mm film is scanned and converted into a digital signal using current equipment, about 20 million pixels can be scanned out, while the full HD format is 1920*1080 (2 million pixels ) However, movie films usually have coarser grains, so a conservative estimate is that doubling the resolution according to the current high-definition format may be the resolution limit of film movies (that is, a resolution of about 4000*2000). Now RED ONE has a higher resolution camera (it seems to be more than 5000X3000)

Of course some films will undergo some digital restoration. After all, they are old, and no matter how good they are, they are not easy to preserve. Especially film, which is not easy to preserve.

It is recommended that you read "720p" and '1080p" on Baidu Encyclopedia

The following is a basic introduction to the three formats

480P is standard definition, and the 480P effect is the best on the market DVD effect!

480p is a video display format. The letter p means progressive scan, and the number 480 means its vertical resolution, which is a scan line with 480 horizontal lines in the vertical direction; Each horizontal line has a resolution of 640 pixels and an aspect ratio of 4:3, commonly known as standard-definition television (SDTV). The frame rate is usually 30 Hz or 60 Hz. General description. In this format, the last number usually indicates the frame rate. 480p is usually used in countries and regions that use the NTSC format, such as North America, Japan, Taiwan, etc. The 480p60 format is considered an enhanced-definition television format (EDTV). ).

720P and 1080P are high-definition

720P is a high-level high-definition digital TV format standard formulated by the Society of Motion Picture and Television Engineers (SMPTE). The effective display format is: 1280×720 .SMPTE (Society of Motion Picture and Television Engineering) divides the different scanning lines of digital high-definition signals into 1080P, 1080I, and 720P (i means interlace, p means Progressive, and 720P means progressive). A display format that reaches a resolution of 1280×720 under progressive scanning. It is a fusion of digital film imaging technology and computer technology

1080P is a video display format formulated by the Society of Motion Picture and Television Engineers (SMPTE). The highest-level high-definition digital TV format standard is a perfect fusion of digital film imaging technology and computer technology. The effective display format is: 1920×1080, and the number of pixels reaches 2.0736 million. The number 1080 means that there are 1080 scans in the vertical direction. Line, the letter P means progressive scan.

Usually the picture resolution of 1080P is 1920×1080, which is generally called high-definition TV. The frame rate is usually 60Hz. Behind p, such as 1080p30. Common frame rates are 24, 25, and 30. HDMI does not necessarily have 1080p output. The picture must support 1920×1080 to be considered a true 1080p output.

A few words, film can do anything! Movies in the 1980s and 1990s were all shot on film. Of course, some directors now use high-definition digital cameras to save costs. When VCD emerged, the film was produced into a 320*240 digital version; When DVD emerged, film was produced into a 720*480 digital version. Today's popular 1080P high definition is based on the comprehensive development of optical storage technology, LCD displays, network transmission, and video encoding and decoding technology. If 35mm film is converted into a digital signal, it can scan out about 20 million pixels, and 1080P with a resolution of 1920*1080 is only 2 million pixels. If the old film is not properly preserved, it can be easily restored using today's digital restoration technology. The color, brightness and noise control can be perfectly solved, and new scenes and images can even be added to the original film.

(Star Wars added many scenes to the DVD version in 2000)

1080P is also destined to be eliminated, replaced by higher resolution, and the source of the film will never change - almighty film