This SDTV icon is made in Material Design style developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 4,300 icons, all in the same style and quality.
The icon is shaped like a rectangle and it has the letters S and D inside it. The letter S is enclosed in a almost full circle that is connected to the D. Under the box there is a line that is about 3/4 the size of the rectangle.