The request refers to specific technical documents related to digital video standards, specifically .
: These are added to the video bitstream to help the decoder display the video correctly. They provide information about color space, aspect ratio, and timing. g_154.mp4
: Ensuring that compressed video maintains its visual integrity and correct "aspect ratio" when played back on different screen sizes. ETSI TS 101 154 V2.1.1 (2015-03) The request refers to specific technical documents related