Dolby Pro-Logic is the technology used to recreate the surround sound experience in the home from existing stereo and Dolby Surround movie soundtracks.
INTRODUCTION
MONO
STEREO
QUAD
DOLBY STEREO
DOLBY SURROUND
DOLBY PRO-LOGIC
DOLBY DIGITAL
DOLBY DIGITAL-EX
DTS
DTS-ES
MPEG-II
SONY SDDS
THX
TIMELINE

Sound Formats

 

Dolby Pro-Logic  
   

DOLBY PRO-LOGIC

The Pro-Logic name is not used to describe a sound format as such, but to identify a particular type of technology. Dolby Pro-Logic decoders allow all of the four channels of analogue audio to be recovered from home cinema sources that carry a Dolby Stereo or Dolby Surround soundtrack. It improves on the basic Dolby Surround sound by allowing a centre speaker to be added above or below the television. If you buy a home cinema amplifier, receiver or processor now, it will have a Dolby Pro-Logic decoder included. Pro-Logic is the current minimum requirement for realistic surround sound. It can decode four channel surround sound from Dolby Surround encoded software, and will even do a fine job of creating its own pseudo surround sound with normal stereo sources, even when no surround information is included on the soundtrack.