"Sanqing"-mark, HD, and full HD

Nowadays, the digital industry is moving towards a higher level of HD, and SD is gradually giving up its position. HD has become a hot topic. What is the difference between them? What is "clear" after HD "? What kind of standards are more suitable for us?

The so-called SDIs a video format with a physical resolution of less than P.

720 p indicates that the video's vertical resolution is lines by line scanning. Specifically, it refers to the "SD" video formats such as VCD, DVDs, and TV programs with a resolution of about 400 lines, that is, standard definition. When the physical resolution reaches P or more, it is called high definition (HD. There are two internationally recognized high-definition standards: the vertical resolution of videos exceeds P or I, and the ratio of video width to height is 16: 9.

Mention HDThe first response of most people is hd TV, not only because HD is first used for TV products, but also has a great relationship with the guidance and promotion of many domestic manufacturers. As far as TV is concerned, there are many products on the market that claim to be "HD" and "Full HD. It is not difficult to find that their image quality is uneven, and some images are of the same quality as ordinary plasma and liquid crystal. This is because sellers confuse the video resolution with the display resolution. In fact, the two are not necessarily related. The video resolution is determined by the camera shooting and the later or compressed encoding settings, the resolution of the display is determined by the manufacturing process.

In fact, as a video format, HD is not synonymous with a single product. At present, HD has been fully used in camera, camera, notebook, player and other fields, and has formed an overall solution for shooting, editing, storage, and display, as Sony has proposed: HD is a world.

The division of "HD" and "SD" comes first from the video effects that can be seen.. Due to the differences in image quality and channel transmission bandwidth, digital TV signals are classified into HDTV, sdtv, and ldtv ). From the perspective of visual effects, HDTV has the highest specifications, and its image quality can reach or close to 35mm wide screen movies. It requires that the horizontal resolution of video content and display devices reach more than 1000 lines, resolution up to 1920x1080. In terms of image quality, since the resolution of high definition is basically four times that of traditional analog TVs, the image definition and color restoration are far better than those of traditional TVs. At, the wide screen display also gives you a wider visual experience. From the audio effect, hd TV programs will support Dolby 5.1 sound loop, while HD film programs will support Dolby 5.1 true HD specifications, audio stream transmission, with DAV-DZ770W 5.1 sound fiber output, this will bring us an amazing sense of hearing.

What is "clear" after SD and HD "?With the demand for high-definition images, full-definition images gradually become our field of view. Full HD refers to the physical resolution of up to 1920x1080 line-by-line scanning, that is, 1080i and 1080 p. It is the top-level HD specification and is called "Full HD ", correspondingly, the 720p and 1080i are referred to as standard HD. Obviously, as the data information in the transmission process is richer, P has more advantages in resolution, especially in the aspect of Large Screen TV, P can ensure a clearer picture quality. It is understood that China has determined to use P as the shooting standard in the broadcast and television studio. As the leader in the HD industry, Sony has always taken full HD as the key and commanding heights of its leading edge, and set "Full HD 1080" as its standard. Currently, Sony has applied this type of top-level hd to its own products: bravia X Series LCD TVs, HDV cameras, and the first high-definition digital camera ux1e and sr1e, ar18cp Blu-ray notebook, Blu-ray player, and PS3 game consoles all comply with the full HD standard, the entire product line has taken another big step forward.

HD is a world and a system. With the unremitting efforts of many manufacturers represented by Sony, the "HD world" has come in an all-round way. It is not hard to predict that replacing SD with HD is an inevitable trend, and "Full HD" will inevitably become a new realm of "HD World.

Concept

What is 480 I, 576i, 720 p, 1080i, P? What is HDTV?

480 I, 576i, 720 p, 1080i, and P 1080p are all standard display modes of television. I indicates interlace scanning, and P indicates row-by-row scanning.

525 I is a standard ntsc TV display mode with a frequency of 60Hz, 483 vertical scanning lines, visible vertical scanning lines, or, recorded as I or 525i.

576i is a standard pal TV display mode with a 50Hz frequency, 625 vertical scanning lines, 576 visible vertical scanning lines, or, recorded as 576i or 625i.

480 P is the D2 standard digital TV display mode, 60Hz frequency, 525 vertical scanning lines, 480 visible vertical scanning lines, or 16: 9, recorded as 525 P or P.

1080i is the D3 standard digital TV display mode, 60Hz frequency, 1125 vertical scanning lines, 1080 visible vertical scanning lines, recorded as 1080i or 1125i.

720 p is the D4 standard digital TV display mode, 60Hz frequency, 750 vertical scanning lines, 720 visible vertical scanning lines, recorded as 750 p or P.

The HDTV standard is a high quality video signal standard, 720 p, 1080 I, P, but currently supports P, which is also known as support for HDTV.