hddvd geting killed in sales. Week ending March 25, 2007 YTD: BD 100/ HD DVD 44.44 SI: BD 100/ HD DVD 84.07 What does that mean? YTD (year-to-date): in the period from Jan 1, 2007, to the date shown above, for every 47.37 HD DVD units sold there were 100 BD units sold. SI (since inception): since the inception of both formats (April 2006 to the date shown above), for every 89.25 HD DVD units sold there were 100 BD units sold.







