API tools faq
paste
drpanwe

UB9000

drpanwe
Nov 23rd, 2018
116
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
text 6.48 KB | None | 0 0
raw download clone embed print report
  1. SDR: Downgrade to 8bits
  2.  
  3. HDR10 vs HDR10+/DV:
  4. The standard HDR10 has the same dynamic-range for the whole film, DV and HDR10+ have a scene-by-scene approach
  5. that allows the tones to shift to better match the content. The standard HDR10 is static metadata, while the HDR10+/DV are dynamic metadata.
  6.  
  7. HDR10+ vs DV:
  8. You have to pay a license to use DV, while HDR10+ is free.
  9.  
  10. It supports dynamic metadata formats/technologies:
  11. * HDR10+
  12. * Dolby Vision
  13.  
  14. It supports also 3D playback format.
  15. It will have the new HDX processor. This processor has a killer feature, called 'chroma subsampling'
  16.  
  17. All 4k UHD (Ultra HD) blu-ray discs are mastered at 10bit 4:2:0, but before the picture
  18. gets output on screen it needs to be converted at 4:4:4 and eventually RGB. The chroma
  19. subsampling of Panasonic is the best on the market. It uses a multi-tap process to upsample
  20. from 4:2:0 to 4:4:4, resulting in sharper and cleaner chroma detail.
  21.  
  22. HDR Optimizer function: This is new feature that attempts to replace the tone-mapping function
  23. on your TV, as the tone-mapping will be performed on the player. So let's say you feed the player
  24. with static metadata content that has Mastering Display Luminance (MDL) metadata with luminance of
  25. 2000 nits, the player can do with HDR optimizer function to tonemap it up to 1000 nits metadata
  26. and send those 1000 nits metadata to the TV. So the TV has to do only very minimal tone-mapping.
  27. This is very beneficial in the case of projectors or very low luminance TVs (less than 500 nits)
  28. or even let's say for content that is mastered at 4000 nits, or even 10000 nits, you can ask the
  29. UB9000 to actually tone-map it down to 1000 nits, 500nits or 1500 nits and send these metadata
  30. to the TV. This feature can actually be switched-off for either static HDR10 content or
  31. play a DolbyVision content in a DolbyVision capable TV, then the HDR optimizer will automatically
  32. be disabled because there's no need for it. The same applies for HDR10+ which is the open standard
  33. format supported by Panasonic, 20th Century Fox, WarnerBros and also Samsung. If you play content
  34. with DolbyVision or HDR10, you will NOT need the HDR optimizer function. They engineers have made
  35. sure that this function will be disabled when you feed a native dynamic metadata source to a
  36. dynamic metadata compatible TV. The interesting happens when you feed static metadata, let's
  37. say you play a DolbyVision disc but your TV is not capable of DV. So what the player will be doing
  38. by default using the base HDR10 layer, and this where the HDR optimizer is helpful. Let's say
  39. that this DolbyVision disc is mastered to 4000 nits, and your TV is only capable of 1000 nits.
  40. What you want the UB9000 to do is to tonemap to 1000 nits and then send the metadata down to 1000 nits,
  41. so the TV doesn't have to do too much work.
  42.  
  43. It also uses the Max CLL (Maximimum Content Light Level) and also the MDL (Mastering Display Luminance)
  44. metadata to actually generate the tone-curve. It retains the specular highlight details much better
  45. and also the accuracy in the brighter parts of the picture. There are four settings for the HDR Optimizer:
  46.  
  47. 1. OLED --> 1000 nits (the same as Middle or High Luminance, just an alias for people to understand better)
  48. 2. Super High Luminance LCD --> 1500 nits
  49. 3. Middle or High Luminance LCD --> 1000 nits
  50. 4. Basic Luminance LCD and Project --> tonemap down to 500 nits
  51.  
  52. So there are basically 3 levels:
  53. * 1500 nits
  54. * 1000 nits
  55. * 500 nits
  56.  
  57. e.g. 4000 nits sun and clouds are meant to be orange, but they look white or yellow. The HDR optimizer it darkens the picture on this particular highlight scene and you can see the details and the correct orange chroma of the clouds. Maybe this is a way to enjoy higher saturation rather than letting whites pixels blow out. The function operates in 32-bit precision, meaning that the dark parts of the picture will maintain the correct
  58. gradation instead of becoming for noise or pixelated. They are basically converting input YCBCR to RGB applying
  59. EQ linear, doing it's tone-mapping thing, coverting back to PQ and then applying it RGB and then back to ycbcr output, using 32-bit position to prevent any video processing errors from clipping in and certainly the dagration works fine.
  60.  
  61. Another key feature is clearly audio capabilities. You can send video and audio separately, using HDMI.
  62.  
  63. All the BluRays with HDR10 they have _static_ metadata. To display them correctly to the TV, they have to
  64. be interepreted correctly and then carry out their own tone-mapping. However, if you think you TV is not
  65. very good with tone-mapping, you can ask Panasonic ub420 or 820, to do the tone mapping instead. So if your bluray is mastered at 4000 nits, the blurayplayer will convert those to 1000 nits, and it will send those
  66. to be displayer. So the video will play nicer on the TV with low-pack brightness or compotentent
  67. tone-mapping algorithm.
  68.  
  69. They also come with Google and Alexa support. Whenever you watch movie your hands are dirty with pop-corn,
  70. so you can pause the movie without touching the remote control.
  71.  
  72. Sony TVs with DV firmware upgrade couldnt play DV content having bluray players as their source, using HDMI. In terms of DV, only streaming services like AmazonPrime or Netflix is supported. After some investigation, it turns out that there are different dolby-vision bitstream profiles to cater for differnt device implementations:
  73.  
  74. * Either GPU accelerated software imp
  75. * Full HW implementation
  76. * or both
  77.  
  78. The Sony's firmware for DV, is not compatible with the existing profile in Oppo bluray and AppleTV4k box. The panasonic algrothithm works fine with Sony TVs.
  79.  
  80.  
  81.  
  82. PS4/Xbox one Netflix app
  83. ------------------------
  84. The application on those devices, when it detects that your TV is calable of 4k HDR, it will always send HDR signal even when the source content is SDR! The Crown on Netflix is only film on HDR, even though is labeled
  85. as Ultra HD 4k. So it can be 4K resolution, but the Dynamic Range is SDR. The PS4Pro and Xbox, the netflix app
  86. will always FORCE HDR content. This cause problems problems because it drives the backlight up to maximum and creates problems with the contrast and the colors.
  87.  
  88. * Elavating black level (because the backlight is elevated to the max value) so the blacks will be shallow and aggrevates problems of blooming and clouding and flashlighting.
  89.  
  90. * Colors: Grey blacks due to backlight driven to maximum, red looks like pink, the colors are more washed out.
  91.  
  92. * Power consumptions: more watts because the processor is heavily used (twice the consumption).
Add Comment
Please, Sign In to add comment
Public Pastes
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!