Source Input Format (
SIF) defined in
MPEG-1MPEG-1 is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s without excessive quality loss, making Video CDs, digital cable/satellite TV and digital audio broadcasting possible.Today, MPEG-1 has become...
, is a video format that was developed to allow the storage and transmission of digital video.
- 625/50 SIF format (PAL
PAL, short for Phase Alternating Line, is an analogue television encoding system used in broadcast television systems in large parts of the world. Other common analogue television systems are SECAM and NTSC. This page primarily discusses the colour encoding system...
/SECAMSECAM, also written SÉCAM , is an analog color television system first used in France....
) has a resolution of (360 or) 352 x 288 active pixels and a refresh rateThe refresh rate is the number of times in a second that display hardware draws the data...
of 25 frames per second.
- 525/59.94 SIF Format (NTSC
NTSC, named for the National Television System Committee is the analog television system used in most of the Americas, Japan, South Korea, Taiwan, Burma, and some Pacific island nations and territories . is also the name of the U.S. standardization body that developed the broadcast standard...
) has a resolution of (360 or) 352 x 240 active pixels and a refresh rate of 29.97 frames per second.
When compared to the
CCIR 601ITU-R Recommendation BT.601, more commonly known by the abbreviations Rec. 601 or BT.601 is a standard published by International Telecommunication Union - Radiocommunications sector for encoding interlaced analogue video signals in digital form...
specifications, which defines the appropriate parameters for digital encoding of TV signals, SIF can be seen as being reduced by half in all of height, width, frame-rate, and chrominance.
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Source Input Format (
SIF) defined in
MPEG-1MPEG-1 is a standard for lossy compression of video and audio. It is designed to compress VHS-quality raw digital video and CD audio down to 1.5 Mbit/s without excessive quality loss, making Video CDs, digital cable/satellite TV and digital audio broadcasting possible.Today, MPEG-1 has become...
, is a video format that was developed to allow the storage and transmission of digital video.
- 625/50 SIF format (PAL
PAL, short for Phase Alternating Line, is an analogue television encoding system used in broadcast television systems in large parts of the world. Other common analogue television systems are SECAM and NTSC. This page primarily discusses the colour encoding system...
/SECAMSECAM, also written SÉCAM , is an analog color television system first used in France....
) has a resolution of (360 or) 352 x 288 active pixels and a refresh rateThe refresh rate is the number of times in a second that display hardware draws the data...
of 25 frames per second.
- 525/59.94 SIF Format (NTSC
NTSC, named for the National Television System Committee is the analog television system used in most of the Americas, Japan, South Korea, Taiwan, Burma, and some Pacific island nations and territories . is also the name of the U.S. standardization body that developed the broadcast standard...
) has a resolution of (360 or) 352 x 240 active pixels and a refresh rate of 29.97 frames per second.
When compared to the
CCIR 601ITU-R Recommendation BT.601, more commonly known by the abbreviations Rec. 601 or BT.601 is a standard published by International Telecommunication Union - Radiocommunications sector for encoding interlaced analogue video signals in digital form...
specifications, which defines the appropriate parameters for digital encoding of TV signals, SIF can be seen as being reduced by half in all of height, width, frame-rate, and chrominance. SIF video is known as a constrained parameters bitstream.
The computer industry has defined square-pixel SIF to be 320 x 240 (
QVGAThe Quarter Video Graphics Array is a popular term for a computer display with 320 × 240 resolution. QVGA displays are most often seen in mobile phones, PDAs and some handheld game consoles...
) or 384 x 288 active pixels with a refresh rate of whatever the computer is capable of supporting.