https://www.atsc.org/atsc-glossary/standard-definition-television-sdtv/
standard definition television (SDTV) - ATSC : NextGen TV
This term is used to signify a digital television system in which the quality is approximately equivalent to that of NTSC. This equivalent quality may be...
standard definitiontelevisionsdtvatscnextgen
https://www.engadget.com/2006-09-12-no-sdtv-patch-for-dead-rising-players.html
No SDTV patch for Dead Rising players
Sep 12, 2006 - In a blow to Xbox 360 owners who aren't using using HDTVs, Capcom has denied requests to release a patch for the recent zombie-survival game, saying it would...
dead risingsdtvpatchplayers