Dolby Surround

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Dolby Surround

A digital audio encoding system from Dolby that provides four channels. Derived from the Dolby Stereo technology used in movie theaters, Dolby Surround was introduced in the early 1980s for video soundtracks, audio cassettes, CDs, TV broadcasts, video games and PC software.

Dolby Pro Logic
The original Dolby Surround decoders in consumer equipment only played back the surround channels. Dolby Pro Logic was introduced shortly after for playback of the center channel as well. Pro Logic II added left and right surround channels (5.1), and Pro Logic IIx added support for 6.1 and 7.1 channels. See Dolby Digital.
References in periodicals archive ?
To celebrate, we're giving away a Pioneer 32in LCD TV with a Dolby Pro Logic and DTS Home Cinema System, courtesy of Revolver Entertainment.
It is based on the individual acoustics of the Vantage's interior and uses a 700-watt amplifier with Dolby Pro Logic II home cinema technology and a new subwoofer to enhance bass performance.
Dolby Pro Logic II technology provides a high-quality, full surround sound experience on any two-channel service, such as stereo radio and television broadcasts.
Dolby Pro Logic II produces five full channels of surround sound through the conventional stereo connectors included with all game consoles.
I tried Dolby Pro Logic decoding with this material (with the center level backed off the usual -3 dB below the Dolby set-up level), and the result was actually quite nice.
If movie-theater sound isn't as important to you, you can save money by holding off on the THX, an upgraded version of Dolby Pro Logic receivers.
It doesn't hook up to a TV and speakers to give Dolby Pro Logic sound.
Conventional surround-sound systems such as Dolby Pro Logic contain four channels of sound - front left, front right, center and rear surrounds - to create a lifelike sound environment for home-movie viewing.
Introduced last year on audio-video receivers (AVRs) from Denon, Integra, Marantz, and Onkyo, Dolby Pro Logic IIz is now available in select new AVRs from Sony.
At the CES Industry Insider Session, "Uni Fi -- Intel in the House," Intel President and COO Paul Otellini demonstrated the first implementation of Dolby Pro Logic IIx for the PC, running on C-Media's Advanced Driver Software Architecture (ADSA) and CMI9880 codec hardware.
Dolby Pro Logic decoding was surprisingly good, given the moderate stage width, but it was necessary to back off the center level -3 dB to get the right perspective.
It will introduce a basic RCA unit that comes with a remote control, plays audio CDs and has Dolby Pro Logic digital surround sound compatibility.