工作原理和分类(国外英文资料).doc

工作原理和分类(国外英文资料) Is the Digital camera is DV, DV Digital Video, translated into Chinese is the meaning of Digital Video, it is by SONY (SONY), PANASONIC (PANASONIC), JVC (victory), SHARP (SHARP), TOSHIBA (TOSHIBA) and CANON (CANON) and so on many famous home appliance giant joint of a kind of Digital Video format. However, a digital video format was developed in the United States. In most cases, however, DV is a digital camera. Digital Video, Digital Video Is the Digital camera is DV, DV Digital Video, translated into Chinese is the meaning of Digital Video, it is by SONY (SONY), PANASONIC (PANASONIC), JVC (victory), SHARP (SHARP), TOSHIBA (TOSHIBA) and CANON (CANON) and so on many famous home appliance giant joint of a kind of Digital Video format. In most cases, however, DV is a digital camera. The characteristics of High resolution As we know, analog cameras book analog signals, so the definition of image (or resolution), also called the resolution of the resolution is not high, such as the level of the VHS cameras clear ZhuZhu model 240 line, best Hi8 only 240 lines. The DV record is a digital signal, with a horizontal resolution of 500 to 540, which is comparable to a professional camera. Colour more pure chroma and brightness of DV signal bandwidth is almost 6 times of analog camera, the chromaticity and brightness bandwidth is one of the most important factor in determining the quality of image, thus DV shooting images of the color is more pure and beautiful, also reached the level of professional camera. Nondestructive copy DV tape recorded signal can be repeatedly transcription, image quality does not drop, which is also analog cameras. advantage Small volume light weight compared with analog cameras, DV machine greatly reduce the volume, usually only about 123 mm * 87 mm * 87 mm, weight is reduce greatly, usually only about 500 grams. Matters needing attention Image quality is a very important technical indicator when purchasing. Refers to the resolution o