Dolby Vision P7 FEL

Modified on Fri, 24 May at 11:02 AM

As the PlayerOne, the PlayerOne 8K is compatibe with DV P7 FEL, but the "residual signal" is ignored.

DV P7 FEL data consists of the following things:

1. BL = HDR10 base layer

2. EL = Enhancement layer, it consists of:

2.1. Dolby Vision metadata (also called RPU metadata), which contain important information for each video frame affecting how this video frame should be tone mapped. This is the most important part of Dolby Vision technology.

2.2. So called "residual signal", which contains a difference between 10-bit video signal and 12-bit video signal. Since all nowdays Dolby Vision devices and OLED panels can display only up to 10-bit, the importance of this residual signal is close to zero. The Samsung TVs that are able to display 12-bit signals are not compatible with Dolby Vision. On the projector since, so far there is no model compatible with Dolby Vision so far except for professional cinemas. It is effect usually can be noticed only when specially testing special synthetic test video files (video test patterns), or when checking rare scenes of certain movies in the pause mode using HDMI capture cards. 

Blu-ray discs can use DV P7 FEL and DV P7 MEL. MEL discs do not contain this residual signal at all. A lot of studios release they Blu-ray discs in DV P7 MEL. This also confirms that they there are no benefits in FEL and in this residual signal.

The chips S928X (used in the R_volution PlayerOne 8K), RTD1619DR (used in the R_volution PlayerOne and the last gen Zappiti Players), RTD1619BPD, S905X4 use Dolby Vision SDK which can not decode and just ignore this residual signal.

But the really important Dolby Vision information (RPU metadata) is decoded and used to ensure proper tone mapping and proper Dolby Vision processing.

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