What is a VCD?
Video CD; VCD) is a standard for storing video information on optical disks. VCD can be played on personal computers or VCD players and most DVD players.
VCD standard was jointly formulated by Sony, Philips, JVC, Panasonic and other electrical appliance manufacturers in 1993, which belongs to the white paper standard of digital compact disc.
VCD technical specification
VCD is a video standard for full motion and full screen playback. Its format can be divided into:
The resolution is 352x240 pixels and 29.97 frames per second (suitable for NTSC TV).
The resolution is 352x240 pixels, with 23.976 frames per second.
The resolution is 352x288 pixels, with 25 pictures per second (suitable for PAL TV).
Overall, the resolution is about a quarter of that of the corresponding TV system. The video of VCD adopts MPEG- 1 compression coding, and the audio adopts MPEG- 1/2Layer 2 (MP2) coding. The bit rate of video is 1 150kbit/s, and the bit rate of audio is 224kbit/s.
Because the bit rate of VCD is comparable to that of ordinary music CDs, a standard 74-minute CD can store about 74 minutes of video in VCD format.
VCD application
VCD is widely used in Asia. In Hong Kong, VCD and DVD have completely replaced video tapes and laser discs in the distribution market.
VCD is thought to be replaced by DVD, but it will remain in the market for some time due to its characteristics.
VCD doesn't have area code restrictions like DVD, which means it can be watched on any compatible machine.
Because of the cost, some programs will not produce DVD or VHS video version, and buyers can only buy VCD version.
VCD is cheaper than DVD. Of course, VCD lacks many extra functions provided by DVD, such as subtitles and menu functions. Making tidbits? ) and so on.
The screen scale is the default, so it will not be displayed at the wrong scale because of accidental screen differences.
The world's first VCD DVD player
In the early 1990s, Jiangmen, Guangdong? Wan Yan? R&D also produced the world's first home VCD, creating a precedent for VCD in the world. But in just two years, Wan Yan, which has this leading technology, was finally submerged in the fierce competition in the same industry. Wan Yan? Invented the VCD player, but did not apply for a patent. Copied by domestic and foreign companies after listing. These manufacturers invest less in VCD industry and have sufficient funds for market development. And then what? Wan Yan? Facing a group of competitors, there is no shield to protect yourself.
VCD file format
VCD format is usually MPG or DAT.
MPG is a format that the computer uses to save after editing.