Microsoft Wins a High-Definition DVD Battle  LOS ANGELES (Reuters) - Blu-ray on Wednesday said Microsoft  Corp. &lt;A HREF="http://www.reuters.co.uk/financeQuoteLookup.jhtml?ticker=MSFT.O qtype=sym infotype=info qcat=news"&gt;MSFT.O&lt;/A&gt; has won the DVD technology group's backing of a  video compression standard for new high-definition discs,  marking an advance for the software maker in an emerging  consumer electronics arena.