• Dolby Pro Logic IIz
    A New Dimension for Home Theater Audio

    Dolby Pro Logic IIz introduces the dimension of height to your audio playback, making the sound you hear from your movies, TV shows, and games more spacious and more true-to-life. Dolby Pro Logic IIz also opens up new possibilities for positioning speakers in your home theater.

    Dolby Pro Logic IIz Benefits

    • Front Height Channels

      Dolby® Pro Logic® IIz introduces two front height channels to expand the possibilities for surround sound in your home theater.

    • A Deeper Audio Experience

      The addition of height to the traditional surround sound setup creates more depth and dimension for an audio experience closer to real life.

    • Speaker Placement Options

      The flexibility built into Dolby Pro Logic IIz provides you with a wide range of choices for speaker positioning to optimize the sound in almost any room.

    • Interpreting Spatial Cues

      Dolby Pro Logic IIz identifies and decodes the spatial cues in any type of content—stereo, 5.1, or 7.1—and then directs certain effects and ambient sounds to the front height speakers.

    The addition of height channels opens up new possibilities for home theater sound.

    A Lifelike Soundstage

    Conventional 5.1- and 7.1-channel surround sound systems deliver a horizontal soundfield—sound is directed at you from only one vertical plane. Dolby Pro Logic IIz adds a pair of speakers positioned above the front left and right speakers to create front height channels. The result? A surround sound experience with more depth and dimension, and one that more accurately represents the way you hear in everyday life.

    With Dolby Pro Logic IIz, rain in a movie sounds like it’s actually falling on your roof. A concert video in Dolby Pro Logic IIz sounds more like an actual performance—think of the stacks of speakers that frame a concert stage, or the tiers in an orchestra.

    How Dolby Pro Logic IIz Works

    Most surround sound solutions use digital signal processing (DSP) to artificially model listening environments. Expanding on proven Dolby Pro Logic IIx technology, Dolby Pro Logic IIz identifies and decodes spatial cues that occur naturally in all content—stereo and 5.1 broadcast, music CDs, DVDs, 5.1- and 7.1-channel Blu-ray Discs™, and video games. It then processes ambient sound and certain amorphous effects such as rain or wind and directs them to the front height speakers.

    Movie and game producers can even mix specific height channels into a soundtrack, and Dolby Pro Logic IIz will faithfully reproduce the vertical placement of those sounds. That means you’ll hear lifelike sound that comes at you from varying heights, compelling you to follow the action with your eyes and ears—above, below, and all around you—precisely as the producers intended.

    Built-in Flexibility

    By expanding the soundfield vertically, Dolby Pro Logic IIz lets you create a 7.1-channel playback system from your 5.1 surround system, or a 9.1 system from your 7.1-channel setup. Dolby Pro Logic IIz even makes speaker positioning and wiring easier.

    How flexible is Dolby Pro Logic IIz? If you already have a 5.1-channel system and buy a new 7.1 A/V receiver with Dolby Pro Logic IIz, you can put the two additional speakers above your left and right front speakers for 7.1 height, or at the back for a traditional 7.1 setup.

    Or you can stay with 5.1 channels and use the extra amplifier channels for stereo speakers in another room. With a 9.1-channel setup, you have even more choices, including state-of-the-art 9.1 playback with both surround and back speakers and two front height speakers.

     

    Dolby Digital Plus: Surround Sound Anywhere, Everywhere

    Dolby Digital Plus™ delivers a definitive surround sound experience for all your devices from home theaters to smartphones.

    Dolby Pro Logic IIz for Professionals

    Dolby Pro Logic IIz expands the audio possibilities and flexibility of the home theater by adding two front height channels, increasing the realism and depth of home theater audio. Based on extensive listening research and proven Dolby technologies, Dolby Pro Logic IIz works with all types of content—movies, music, TV, and games.

    Dolby Pro Logic IIz for Professionals

    Dolby Pro Logic IIz expands the audio possibilities and flexibility of the home theater by adding two front height channels, increasing the realism and depth of home theater audio. Based on extensive listening research and proven Dolby technologies, Dolby Pro Logic IIz works with all types of content—movies, music, TV, and games.

    Dolby Pro Logic IIz Specifications

    Dolby Pro Logic IIz incorporates all of the features and capabilities of Dolby Pro Logic IIx. The following information summarizes existing Dolby Pro Logic IIx implementations and what’s added for Dolby Pro Logic IIz.

    • Ability to generate up to 7.1 channels from stereo and 5.1 sources
    • Supported decoding:
      • Pro Logic mode
      • Virtual Compatible mode
      • Music mode
      • Movie mode
      • Matrix mode
      • Dolby Digital EX mode  
       
    • Supported upmixed output configurations based on stereo sources:
      • 2 to 3 [L, R to L, C, and R]
      • 2 to 4 [L, R to L, R, Ls, and Rs] 
      • 2 to 5.1 [L, R to L, C, R, Ls, and Rs] 
      •  2 to 6.1 [L, R to L, C, R, Ls, Rs, and Cs] 
      •  2 to 7.1 [L, R to L, C, R, Ls, Rs, Lrs, and Rrs]  
       
    • Supported upmixed output configurations based on 5.1 sources with independent Ls and Rs channels:
      • 5.1 to 6.1 [Ls, Rs to Ls, Rs, and Cs]
      • 5.1 to 7.1 [Ls, Rs to Ls, Rs, Lrs, and Rrs]
       

    The features listed above allow Dolby Pro Logic IIx to provide a true surround sound experience from a variety of sources. However, all the outputs derived by existing Dolby Pro Logic IIx decoders are located in a horizontal plane. The Dolby Pro Logic IIz extensions to Dolby Pro Logic IIx allow it to derive height channel outputs that significantly enhance the spatial experience.

    In addition to the features already described, the height extensions offer the following new features and configurations:

    • Ability to generate audio of up to 9.1 channels that include height channel outputs from stereo, 5.1, and 7.1 Back sources
    • Supported upmixed output configurations based on stereo sources:
      • 2 to 7.1 Height [L, R to L, C, R, Ls, Rs, Lvh, and Rvh]
      • 2 to 9.1 [L, R to L, C, R, Ls, Rs, Lrs, Rrs, Lvh, and Rvh] 
       
    • Supported upmixed output configurations based on 5.1 sources with independent Ls and Rs channels:
      • 5.1 to 7.1 Height [Ls, Rs to Ls, Rs, Lvh, and Rvh] 
      • 5.1 to 9.1 [Ls, Rs to Ls, Rs, Lrs, Rrs, Lvh, and Rvh]  
       

    Note: For 5.1-channel sources, Dolby Pro Logic IIz height extensions operate only on the Ls and Rs channels; L, C, R, and LFE channels are bypassed.

    Because new formats (such as Blu-ray Disc) allow content to contain up to 7.1 discrete channels from Dolby Digital Plus and Dolby TrueHD audio programs, the height extensions support 7.1 Back sources and offer the following upmixed output configurations:

    • 7.1 Back to 7.1 Height [Ls, Rs, Lrs, and Rrs to Ls, Rs, Lvh, and Rvh]
    • 7.1 Back to 9.1 [Ls, Rs to Ls, Rs, Lrs, Rrs, Lvh, and Rvh]

    Note: For 7.1-channel sources, Dolby Pro Logic IIz height extensions may operate only on the Ls, Rs, Lrs, and Rrs channels; L, C, R, and LFE are bypassed.