I’ve just got a Bravia TV as well, but haven’t got round to set­ting up DLNA stream­ing yet.(I’ve got builders in as well.) I’d pre­sume that HD in this case is the TV’s native res­o­lu­tion of 1920×1080, and that SD is stan­dard def­i­n­i­tion for PAL/SECAM as we’re in Europe. That’s 576 pix­els high, and the width depends on whether it’s 4:3 or 16:9 ratio.