It is also optimized for extracting non-encoded ambience from stereo signals using the natural phase present in the signal.
DTS DECODER TO DOLBY PROLOGIC PRO
Pro Logic II is an improved method that handles 5-channel encoding/decoding (giving stereo surround output instead of mono).
DTS DECODER TO DOLBY PROLOGIC PLUS
Pro Logic is an encoding/decoding format that matrix encodes 4 channels (L/C/R plus mono surround) into 2-channels that the decoder then separates again back into 4-channels. Pro Logic was the processing used to detect and extract those matrixed channels if and when present and is basically how multichannel surround sound was originally delivered prior to discrete multichannel formats being developed and becoming commonplace.ĭolby have simply repurposed the name DOLBY SURROUND and now use it for an upmixing mode on Atmos enabled hardware.ĭolby Surround (Known as Pro Logic as a home format) is indeed a FORMAT unlike the ignorant claims stated here.
What you are confusing it with is the original DOLBY SURROUND which was a format that comprised of 2 channels with matrixed surround channels. It is prcessing and not a format! If there are matrixed channels present in 2 channel sources then it will detect this and extract them. I can happilly apply PLII to a 5.1 source that has no matrixed channels and still get 7.1 by the way in which it would create pseudo back channels if not actually present as discrete channels. Pro Logic was the processing used to extract channels if and when they'd been matrixed into stereo sources. Pro Logic II is not a format so no, it is not extracted from anything. I was testing it with the game cube and the game roque squadron III ,that has a sound test option with a tie flying around the "camera" and the AVRs decodes perfect the dolby prologic 5.1 signal using the upmixer DSUR Now, the important part, ¿how can be dolby pro logic procesed by a new AVRs?, this was question already answered, use Dolby Surround (the actual Dolby surround upmixer). Old AVRs process this "stereo signal with steroids" in order to separate the chanels, so yes, old consoles like nintendo gamecube already have 5.1(non discrete).Įven the nintendo 64 also have "5.1" using Dolby surround (this is not the actual dolby surround that have actual AVRs, its another matrix codification, ancestor of pro logic.) In spanish wikipedia you can even get the angles -> here The first point is that, tecnicaly dolby pro logic I/II is "encoded", not like dolby digital in discrete chanels but its encoded in phase wave on the stereo signal, that is called matrix encoding. I researched about this because i have a gamecube conected to my denon 1600 and i wanted to use doby pro logic with it.
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