DVD与VCD的区别用英语

Question

DVD与VCD的区别 用英语

Answer 1

First, the image sharpness
VCD is about the general image resolution 280 lines, while the DVD's image is about 500 lines of resolution can be achieved, that is, speaking from the sharpness of the image, DVD VCD about to increase more than about twice.
Second, the sound signal
VCD only two channels, left and right channels, a general stereo output signal; the DVD standard is generally used an AC-3 audio compression standard that, AC-3 generally have 5-way audio signal output, as well as a subwoofer, so-called 5.1-channel, DVD can really create a home theater stereo surround effect.
Third, the disc size
Both from the disc is the same in terms of size, are 12 cm, except that the DVD player can play DVD, in addition, the disc still can play VCD's.
If you want to fully embody the DVD's visual effects, choose the TV standard definition at least 400 lines or more; DVD can be released if you want a real surround sound requires audio, amplifiers and other sound reproducing system with a Dolby Digital decoder .
Fourth: DVD and VCD of the same size and compression format, a VCD is about the capacity of about 800M, and a DVD-5's capacity to reach 4.7G, which is equivalent to 6 times the VCD. VCD MPEG1 compression format is used, while the DVD is the use of MPEG compression format, the image clearer. On the sound quality is, VCD only general left and right channel output, and DVD can do AC-3 Dolby and DTS 5.1-channel or 7.1 channel such as audio decoding, more than two-channel bass and surround sound, that sound would not have said. DVD and VCD reason why you feel the same effect as the sound, perhaps you only use the TV or the two-channel amplifier output sound, because TV is 2 channel output. To experience the true sound, then starting a DVD 5.1 amp to hear the real sound effects.