{"id":2549,"date":"2020-11-20T19:10:40","date_gmt":"2020-11-20T19:10:40","guid":{"rendered":"http:\/\/mp4gain.com\/mp4gain\/?p=2549"},"modified":"2020-11-20T19:12:16","modified_gmt":"2020-11-20T19:12:16","slug":"analog-and-digital-video","status":"publish","type":"post","link":"https:\/\/mp4gain.com\/mp4gain\/analog-and-digital-video\/","title":{"rendered":"Analog and digital video"},"content":{"rendered":"

Analog and digital video<\/strong><\/p>\n

\"Analogic<\/p>\n

Analog video is the oldest method of transmitting video signals. One of the first video formats based on the analog method was composite video.<\/p>\n

\"Analogic\"<\/p>\n

Composite analog video combines all video components (luminance, color, time, etc.) into a single signal. By combining these elements into a single signal, the quality of composite video is far from perfect. As a result, we have inaccurate color reproduction, insufficiently clear image, and other quality loss factors. Composite video quickly gave way to component video, in which multiple video components are represented as separate signals.<\/p>\n

The fact is that the human eye, in addition to the light-sensitive elements active at high illumination and perceiving reference colors (R, G, B), has elements that are active even in almost complete darkness and fix only the illumination of the object. As a result, the brightness of the object is much more important to perception than its color characteristics.<\/p>\n

Furthermore, the volume of information transmitted is important: the smaller the volume, the cheaper and simpler the transmission systems are. You can reduce the amount of information by reducing the amount of color data. Therefore, in television, not one RGB signal is transmitted and received, but brightness Y and two color difference signals U and V, with U = RY and V = BY. In this case, it is not necessary to code all three colors. It is enough to specify two of them, and the third is easily calculated by arithmetic operations. U and V can have twice the resolution of Y.<\/p>\n

However, all the above formats are still essentially analog and therefore have a major drawback: when copying, the shot is always inferior in quality to the original. Loss of quality when copying video material is similar to photocopying: the copy is never as clear and vivid as the original. The inherent disadvantages of analog video led to the development of the digital video format. Unlike analog video, which loses quality when copied, each digital video copy is the same as the original.<\/p>\n

Interesting Facts About Analog Video<\/p>\n

Analog video is a type of video used on television. The image on the screen is created when a beam of electrons moves across a screen covered with a phosphor, a material that emits light of a certain wavelength, that is, a certain color. This process is called scanning and it goes through lines (horizontal) and squares (vertical). To get moving videos, you need to scan multiple frames per second. In televisions, the frames change at a rate of several tens per second. A single image is made up of scan lines that are reproduced in two sets called fields.<\/p>\n

In television, an interlaced method is used to form an image on the screen, in which during the first scan cycle of the screen using an electron beam, an image of odd lines is formed, and for the second, the lines pairs, as a result, a complete picture frame is formed from two half frames (fields). The use of this imaging method is due to the need to narrow the spectrum of the television signal. Although these frame rates and scan lines can create smooth motion, they do not eliminate video flicker.<\/p>\n

Television standards<\/p>\n

Currently three main color television standards are used:<\/p>\n

American NTSC (National Television Standards Committee – National Television Standards Committee), the number of lines per frame 525, 60 Hz;
\nGerman PAL (Line alternating phase – lines with variable phase), the number of lines per frame 625, frequency 50 Hz;
\nFrench SECAM, the number of lines per frame is 525, the scanning frequency is 50 Hz, in Russia the SECAM D \/ K modification is adopted.
\nThe standards differ in the modulations used and the carrier and subcarrier values.<\/p>\n

Digital video at a glance<\/p>\n

Digital video is an image or series of images in which information is stored in digital form. It uses digital signals and standards other than international ones to transmit and display images used in analog video.<\/p>\n

When creating digital video, the problem arises of converting an analog signal to digital. The standards for video digitization adopted in modern technology are: 10 bits – the digitization depth, 13.5 MHz – the luminance signal sampling rate, 6.75 MHz – the sampling rate of two channels of color difference.<\/p>\n

Recently, there has been a trend towards the fusion of television and computer video.<\/p>\n","protected":false},"excerpt":{"rendered":"

Analog and digital video Analog video is the oldest method of transmitting video signals. One of the first video formats based on the analog method was composite video. Composite analog video combines all video components (luminance, color, time, etc.) into a single signal. By combining these elements into a single signal, the quality of composite … Continue reading “Analog and digital video”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[52843,52833,50441,29853,52831,40758,52838,52835,52834,52860,52863,52832,52868,52846,52844,52845,52852,52858,52861,52866,52869,52887,40713,52857,52877,52878,52836,52848,52850,52853,52855,52873,52871,52879,52882,52881,52880,52864,52856,52854,52865,15808,52872,52876,52859,52849,52875,29854,52847,52842,52839,52841,52851,52840,52867,52870,52883,52862,38349,52884,52837,52885,52886,52874],"class_list":["post-2549","post","type-post","status-publish","format-standard","hentry","category-audio-video","tag-analog-and-digital-clock-video","tag-analog-and-digital-video-difference","tag-analog-and-digital-video-editing","tag-analog-and-digital-video-formats","tag-analog-and-digital-video-in-hindi","tag-analog-and-digital-video-in-multimedia","tag-analog-and-digital-video-in-multimedia-in-hindi","tag-analog-and-digital-video-in-multimedia-pdf","tag-analog-and-digital-video-in-multimedia-ppt","tag-analog-and-digital-video-me-antar","tag-analog-and-digital-video-ppt","tag-analog-and-digital-video-signals","tag-analog-and-digital-video-standards","tag-analog-digital-video-comparison","tag-analog-digital-video-converter","tag-analog-digital-video-converter-mac","tag-analog-digital-video-explained","tag-analog-digital-video-konverter","tag-analog-digital-video-meaning","tag-analog-digital-video-recorder","tag-analog-digital-video-signal-converter","tag-analog-digital-video-wandler","tag-analog-till-digital-video-omvandlare","tag-analog-to-digital-ip-video-converter","tag-analog-to-digital-tv-video-converter","tag-analog-to-digital-usb-video-converter-for-pc","tag-analog-to-digital-video-adapter","tag-analog-to-digital-video-converter-windows-10","tag-analog-to-digital-video-decoder","tag-analog-to-digital-video-encoder","tag-analog-to-digital-video-interface","tag-analog-to-digital-video-server","tag-analog-to-digital-video-software","tag-analog-video-and-digital-video","tag-analog-video-and-digital-video-difference","tag-analog-video-and-digital-video-in-hindi","tag-analog-video-and-digital-video-in-multimedia","tag-analog-video-and-digital-video-pdf","tag-analog-video-vs-digital-video-in-multimedia","tag-analog-vs-digital-video-games","tag-analog-vs-digital-video-quality","tag-analog-vs-digital-video-recording","tag-analog-vs-digital-video-surveillance","tag-analog-vs-digital-video-transmission","tag-analog-zu-digital-video-konverter","tag-analog-to-digital-video-capture-device","tag-analogue-and-digital-time-video","tag-analogue-and-digital-video-formats","tag-analogue-digital-video-converter","tag-basics-of-video-analog-and-digital-video","tag-difference-between-analog-and-digital-video","tag-difference-between-analog-and-digital-video-camera","tag-difference-between-analog-and-digital-video-in-multimedia","tag-difference-between-analog-and-digital-video-in-multimedia-in-hindi","tag-difference-between-analog-and-digital-video-recording","tag-difference-between-analog-and-digital-video-signal","tag-difference-between-analog-video-and-digital-video-in-multimedia","tag-difference-of-analog-and-digital-video","tag-digital-and-analog-audio-video-to-hdmi-converter-switch","tag-digital-video-vs-analog","tag-the-difference-between-analog-and-digital-video","tag-what-is-analog-and-digital-video","tag-what-is-analog-and-digital-video-in-hindi","tag-which-video-interface-contains-analog-and-digital-video-signals"],"yoast_head":"\nAnalog and digital video - mp4gain.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mp4gain.com\/mp4gain\/analog-and-digital-video\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Analog and digital video - mp4gain.com\" \/>\n<meta property=\"og:description\" content=\"Analog and digital video Analog video is the oldest method of transmitting video signals. 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