Originally Posted by mt14942
Does the Oppo 205 use profile 5? I read that for Dolby Vision all devices connected to Sony TV's. Apparently this is the reason many people in the Sony TV
forums are complaining about dimness of Dolby Vision. Apparently all other brand of TV's use profile 4. This is the first I ever heard of this?
Sony TVs do not have the ability (horsepower?) to process Dolby Vision internally. Instead they require the player to do the heavy lifting, and send pre-digested Dolby Vision to the TV. How this all works is mandated by Dolby. That said, use of the full dynamic range of light available in the TV is up to the TV and its settings -- i.e., what it does with the pre-digested Dolby Vision it gets from the player. In the OPPO this is called Dolby Vision: Player Led. That is, the Player is taking the lead in digesting the Dolby Vision format.
If the same complaints are coming from folks using Dolby Vision capable Sony players (which I believe to be the case), then clearly the problem is either in Dolby's specification for how this all works, or in the implementation in the TV.
The original implementation of Dolby Vision (in other TVs) had the TV doing the heavy lifting. The player packages up the Dolby Vision content coming off the disc and sends it, unmolested, to the TV. Indeed it is important the player *NOT* try to process the Dolby Vision, as it is in a weird format at that point, unlike anything the video processing in the player knows how to handle. In the OPPO this is called Dolby Vision: TV Led. That is, the TV is taking the lead in digesting the Dolby Vision format.
Whether Player Led or TV Led, the output of the OPPO had to pass Dolby's certification tests for Dolby Vision. I.e., the TV should be getting "the right stuff" (as defined by Dolby) either way.
Some newer TVs (as from LG) can work either way -- Player Led or TV Led in the OPPO. Most will barf if the wrong choice is made in the player -- no image or an obviously screwed up image. The Dolby Vision: Auto setting is supposed to make this choice for you automatically, according to what the TV says it prefers during the HDMI handshake. However there is a bug in the current OPPO firmware, such that in some cases, with some TVs, the wrong choice gets made. (Dolby slipped in an unexpected change in the way that check works in their code included in this most recent OPPO firmware.) Thus it is best to explicitly select TV Led or Player Led in the OPPO according to which works best to your eyes. Again, if the TV doesn't like the choice you made the image will be obviously wrong. If the TV can work with EITHER choice, the choice isn't supposed to make a difference. But you know how that goes....