How do I know if a DVD or Laserdisc is Surround EX encoded?
Currently consumer Surround EX material is not explicitly labeled as such. An official Dolby Digital Surround EX logo does exist. The logo will shortly appear on upcoming Surround EX encoded DVD releases. Widescreen Review magazine is currently including the logo in their reviews when applicable. DTS ES will apparently be the logo for DTS material encoded with a back surround channel.