- Tech know how online

standard definition television (SDTV)

Standard Definition Television (SDTV) is the quality standard for digital TV with a lower resolution than high-definition televisionHDTV. It is the digital counterpart to classic analog television.

With an aspect ratio of 4:3, this quality standard offers resolutions of720 x 576 pixels for the PAL television standard and 640 x 480 pixels for NTSC. In addition to the 4:3 aspect ratio, SDTV also offers a 16:9 aspect ratio.

The frame rates are 25 or 30 frames per second. The transmission bandwidth for the video signal is about 5 MHz, and the sampling frequency is 13.5 MHz. The standard was developed by the Advanced Television Systems Committee( ATSC) and standardized by the International Telecommunication Union( ITU) in Recommendation BT.601.

Standard Definition Television (SDTV) with 576 visible lines

Standard Definition Television (SDTV) with 576 visible lines

SDTV can use interlaced or progressive scan. Both methods are compatible with each other, because Progressive Segmented Frame( psF) can be used to compensate for the difference. This means that the motion resolution with progressive scan is only half that with interlaced scan.

SDTV uses MPEG-2video compression for digital TV.

Englisch: standard definition television - SDTV
Updated at: 23.04.2013
#Words: 161
Links: standard (STD), digital, television (TV), resolution, analog
Translations: DE

All rights reserved DATACOM Buchverlag GmbH © 2023