video format


Also found in: Dictionary, Thesaurus, Medical, Legal.

video format

The structure of an electronic movie. The digital formats have many more options than the older analog formats.

Digital Video Formats


Following are the encoding variables in a digital video format. See HD formats, SD formats, codec examples and DTV.

Compression (DCT, MPEG, etc.)
The compression algorithm reduces the size of the video content by eliminating pixels, saving bandwidth and storage space. See data compression.

Interframe vs. Intraframe
Interframe coding saves space by creating partial frames, which has implications when editing later on. See interframe coding.

Chroma Subsampling and Bit Rate
Chroma subsampling saves space by compressing the color components, while the bit rate determines how much data can be encoded in each frame. See chroma subsampling and bit rate.

Resolution, Frame Rate and Progressive/Interlace
The horizontal and vertical resolution determines the aspect ratio of the frame and whether it is standard definition (SD) or high definition (HD), while the number of frames per second (frame rate) has impact on scenes with high-speed action. In progressive scan, there is twice as much information per frame as there is in the interlace method. See screen resolution and progressive scan.

Summary of Digital Video Format Variables
1 - compression (DCT, MPEG, etc.)
2 - interframe vs. intraframe
3 - chroma subsampling
4 - bit rate
5 - horizontal/vertical resolution
6 - frame rate
7 - progressive scan vs. interlace


Analog Video Formats


Following are the encoding variables in the analog NTSC, PAL and SECAM video formats. PAL and SECAM are still broadcast in some countries, and all of these formats still exist on VHS tapes. Modern digital TVs may provide one or more types of analog inputs to accommodate them. DVDs were on the market long before digital TVs were commonplace, and although encoded in the MPEG-2 digital format, DVDs conform to NTSC and PAL/SECAM resolutions and frame rates.

Resolution, Frame Rate and Interlace
NTSC, PAL and SECAM are interlaced standard definition (SD) formats. NTSC has 480 lines of resolution at 30 frames per second (fps), and PAL and SECAM have 576 lines at 25 fps. See NTSC, PAL, SECAM and interlace.

Component, S-Video and Composite
NTSC and PAL are mastered in the YUV color space, which requires three "component video" cables to carry the video signals (SECAM uses a variation of YUV). As the content is transferred to VHS tapes and other lower-quality destinations, colors are combined to save bandwidth, and only one cable is used. See YUV, component video, S-video and composite video.

Summary of Analog Video Format Variables
1 - horizontal/vertical resolution
2 - frame rate
3 - progressive scan vs. interlace
4 - component, S-video and composite
References in periodicals archive ?
Ability to define YouTube video format from WebM, MP4, FLV, 3GP and to set video quality up to 1080p before downloading;
World's first semiconductor IP to support both HEVC and VP9 video formats
It allows users to convert WTV, DVR-MS and WMV video files directly to MP4, AVI, MOV and other popular video formats with a quick conversion speed.
264, AVI, FLV, WMV, 3GP, VOB, MKV, DivX, XviD, MOV or other popular video formats.
The company also announced the addition of rich video and media sharing capabilities, enabling organisations to easily share and collaborate using multiple video formats.
Only one highdefinition video format has been expected to emerge as the winner, similar to the way VHS trumped Sony's Betamax in the video format battle of the 1980s.
Only one high-definition video format has been expected to emerge as the winner, similar to the way VHS trumped Sony's Betamax in the video format battle of the 1980s.
They take your video file and convert it into a Flash Movie format, which is as close to a universal digital video format as we're going to get.
Customers using Adobe After Affects CC will be able to work in the highest quality compressed and uncompressed video formats up to Ultra HD and 4K, for amazing compositing and graphics production workflows.
BEIJING, June 12, 2012 /PRNewswire-Asia/ -- The FLV video format is widely applied in online video sharing for its smart size.
As a full DivX Certified portable device, the DP7010 is among the first generation of portable media players (PMP) to offer full playback of the hugely popular DivX video format.
For example NTSC, the standard analog video format in the United States, specifies 30 frames per second.