Video
Electronic medium for recording and displaying moving visual images.
Video is an electronic medium used for the recording, copying, playback, transmission, and display of moving visual images and pictures, with or without accompanying audio. It was initially developed for live transmission and later expanded to include recording and storage through analog formats such as magnetic tape. Since the late 20th century, digital video has become the dominant form, enabling efficient compression, storage, editing, and distribution across broadcast television, physical media, and internet-based platforms.
- field
- Electronic medium for moving visual images
- common_formats
- NTSC, PAL, SECAM
- typical_frame_rates
- 24 fps (film), 25 fps (PAL/SECAM), 29.97 fps (NTSC)
- aspect_ratios
- 4:3 (traditional), 16:9 (high-definition)
Lore & Background
Video developed from facsimile systems of the mid-19th century. Unlike film, which records photographic images, video encodes images electronically into analog or digital signals. Live video was first used in mechanical television systems, which were quickly replaced by cathode-ray tube (CRT) systems. Live video cameras used an electron beam to scan a photoconductive plate, producing a voltage signal proportional to brightness, which was then transmitted to televisions. Charles Ginsburg led an Ampex research team to develop one of the first practical video tape recorders (VTR).
Reader's Guide
Digital video is capable of higher quality and eventually much lower cost than analog. Advances in computer technology allow inexpensive personal computers and smartphones to capture, store, edit, and transmit digital video, reducing production costs and enabling tapeless production. The advent of digital broadcasting and the digital television transition are relegating analog video to legacy status in most parts of the world. High-resolution video cameras with improved dynamic range and broader color gamuts, along with high-dynamic-range digital intermediate data formats, have caused digital video technology to converge with film technology. Since 2013, the use of digital cameras in Hollywood has surpassed film cameras. Video systems vary in display resolution, aspect ratio, refresh rate, and color reproduction. Both analog and digital video can be carried on radio, magnetic tape, optical discs, computer files, and network streaming.
Did You Know?
- The word 'video' comes from the Latin 'video,' meaning 'I see.'
- The minimum frame rate to achieve persistence of vision is about 16 frames per second.
- Vertical-video ads are watched in their entirety nine times more frequently than landscape ads.
- Interlacing was invented to reduce flicker in early mechanical and CRT video displays without increasing the number of complete frames per second.
Frequently Asked Questions
What is Video in the context of communication and media?
Video is an electronic medium that captures, stores, transmits, and displays moving visual images, optionally paired with sound. It encompasses everything from live broadcast signals to stored files played back on a screen.
What are the main analog video standards and their frame rates?
The three classic analog systems are NTSC (29.97 fps), PAL (25 fps), and SECAM (25 fps), each tied to different regional broadcast networks. Film-origin content typically runs at 24 fps, which is then conformed to one of these broadcast rates.
How did Video transition from analog to digital?
Video began as a live-transmission technology and later added recording via magnetic tape in analog form. Starting in the late 20th century, digital encoding took over because it enabled far more efficient compression, editing, and distribution over broadcast, disc, and internet channels.
What aspect ratios does Video use, and why do they differ?
Traditional television and early video relied on a 4:3 frame, while modern high-definition and most streaming content use a wider 16:9 ratio. The shift to 16:9 gave producers more horizontal space for cinematic composition and better matched widescreen film formats.
Why is Video considered a cornerstone of modern media distribution?
Digital video's ability to compress large moving-image files into manageable sizes made it practical to store, edit, and share across countless platforms. This underpins everything from broadcast television and physical discs to on-demand streaming services.
More in Communication And Media 1-21
Spotted an error? Know more?
This is a living reference — every entry is fact-audited, and reader corrections feed straight into our audit queue. Suggest an edit · See this site's audit record