獻醜了,我自己找到答案了:

原文摘錄自http://www.meritline.com/piondvblanme.html
...
DVD-R Authoring vs. General Media:
Q:What𠏋 the Difference?
A:There are two types of DVD-R media:
DVD-R for Authoring media can be recorded only on the Pioneer
DVR-S201 and DVR-S101 (3.95 GB only).
DVD-R for General media can be recorded only on the (soon to be
released) Pioneer DVR-A03 and DVR-103 (OEM) drives.
...

簡單的說, DVD-R for Authoring 是給工業用燒錄機用的,
DVD-R for General 是給一般用途燒錄機用的,燒出來的片子在DVD-ROM和
DVD-PLAYER都可以看.

這個網站有 DVD-R 的報價
http://www.meritline.com/dvdmedia.html