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What is HLG Sony A7III?
Besides the Sony A7R III, the A7III is just the second mirrorless camera in the Alpha series lineup that comes with Hybrid Log Gamma (HLG) – a picture profile alternative to the widely used Cine4 and S-Log profiles.
What is HLG on Sony?
Hybrid Log-gamma (HLG): HLG is a “hybrid” format that enables the output of HDR images similar to HDR10 and Dolby Vision™ format. It can also display images with well-balanced brightness even in SDR TVs.
What is HLG support?
HLG refers to either a transfer function (Hybrid log–gamma) or to an HDR format (HLG10). The Hybrid log–gamma (HLG) transfer function is a transfer function jointly developed by the BBC and NHK for high dynamic range (HDR) display. It’s backward compatible with the transfer function of SDR (the gamma curve).
Is HLG an HDR?
At its heart, HLG is mercifully more simple than it sounds. It combines standard dynamic range and high dynamic range images into just one video signal that can play as SDR on SDR screens or HDR on (HLG-compatible) HDR screens, ensuring viewers aren’t left in the dark, no matter what TV they have.
What does HLG mean camera?
Hybrid-Log Gamma
As if there weren’t enough acronyms and phrases in the photo and video industry, Hybrid-Log Gamma (HLG) and High Dynamic Range (HDR) are probably ones that you should take care to learn more about, because they are going to become more important in the coming months and years.
Do you need log for HDR?
More efficient way to store brightness information Before the advent of HDR displays, log recording was commonly used to provide more grading options for standard dynamic range finishing. When shooting for HDR, it’s even more essential, as more of that highlight information will make it through to the final image.
What is HDR10+ hybrid gamma HLG?
Hybrid log gamma, or HLG, is another kind of high dynamic range (HDR), similar to HDR10 and Dolby Vision. While HDR10 and Dolby Vision are restricted to streaming (Netflix, Amazon Video, etc.), disc (4K Blu-ray) or video games, HLG is designed for broadcast cable, satellite and live TV.
What is the difference between the hlg3 and hlg2/hlg1 profiles?
Whilst the HLG3 profile is practically the same as HLG BT.2100 which means that a standard HLG BT.2100 profile can be used for normalization, the HLG2 and HLG1 profiles are not standard as they’re limited to 95\% and 87\% of the full signal level respectively.
Why is my HLG profile showing at 41 ire?
Unfortunately for HLG profiles, the exposure metering on Sony cameras seems to align with the ITU BT.709 curve rather than a true HLG curve. The end result of this behavior is that users may inadvertently expose their footage at 41 IRE across the HLG curves rather than at the true native middle gray values.
What is the best HLG profile for Sony cameras?
In summary, stick to HLG3 or the standard HLG profile on Sony cameras and expose at 38\% IRE if your main focus is SDR delivery. The other custom HLG profiles are simply inefficient and far too niche for any useful purpose.
What is the Hybrid Log Gamma (HLG) format?
Until the recent advent of the A7S III and subsequent cameras, Sony has been implementing 8-bit 4:2:0 Internal and 8-bit 4:2:2 External recording across their hybrid camera ranges – even for HLG! The Hybrid Log Gamma system was conceived from the onset as a broadcast format of the future with a minimum of 10-bit encoding in mind.