So-called "full resolution" for TV specs. Normally D1 can mean one of the following video resolutions:
* 704x576 (TV PAL)
* 704x480 (TV NTSC)
* 720x576 (DVD-Video PAL)
* 720x480 (DVD-Video NTSC)
4CIF (4 Common Intermediate Format)
* 704x576 in PAL
* 704x480 in NTSC
2CIF (2 Common Intermediate Format)
* 704x288 in PAL
* 704x240 in NTSC
DCIF (Double Common Intermediate Format)
Compared DCIF with CIF and 2CIF: under the same bit rate, the image quality and definition is greatly improved.
* 528x384 in PAL
* 528x320 in NTSC
CIF (Common Intermediate Format)
Back in history, this acronym's name comes from video conferencing
tools in late 1980's and early 1990's. Nowadays the term CIF is used to
mean specific video resolution:
* 352x288 in PAL
* 352x240 in NTSC
CIF is 1/4th of "full resolution" TV, also called as D1 and is best-known because VideoCD standard uses this resolution.
QCIF (Quarter Common Intermediate Format)
Old video resolution name. 1/4 of CIF video resolution. Standard sizes :
* 176x144 in PAL
* 176x120 in NTSC
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