Chat-Room Q&A - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 11 Old 07-29-2017, 05:30 PM - Thread Starter
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Chat-Room Q&A

AVS Forum Associate Editor Mark Henninger and I spend a pleasant hour answering questions from the chat room. Topics include why home projectors don't yet implement Dolby Vision, 4K/UHD projectors in the $2-3K price range, home-theater lighting control, whether we prefer the LG E7 or Sony A1E OLED TV, will there ever be a single HDR format, high-resolution audio, headphone virtualization, VR for movies, Dolby Atmos, and more.

http://www.avsforum.com/chat-room-qa-6/
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post #2 of 11 Old 07-30-2017, 05:15 PM
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Hey Scott, HLG has been described both as another format of HDR, as well as an alternative to PQ(most notably by Joe Kane). How is it both?
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post #3 of 11 Old 07-31-2017, 12:37 PM
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Loved the Q&A but as a heads up that some of the upcoming 4k projectors do not have 3d playback example being the new 4k Optoma projectors are not offering 3d capability which is sad.

But very informative. I am also Apartment living so everything I have done I can undo, but I havent tried putting black fabric up on my ceiling just yet, what kind of clips would you recommend to secure the fabric to the ceiling so it doesnt fall down or losen over time and sag.

Projector: BenQ w1500 + ES Sable 135" Screen AVR: Marantz SR6011 ATMOS/DTSX + Darbee 5000s
Speakers: Polk Audio TSX550t (FL/FR), CS2 Series II (C), Monitor40 Series II (RL/RR),
Polk Audio TSx110B (Ceiling FL/FR RL/RR), (2) JL Audio 12" Subs + (2) Dayton 15" Subs + (2) ButtKicker LFE
Arrangement: 5.1.4 Source: OPPO UDP-203 4k Bluray Player, Roku 4, HTPC, Nexus Player
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post #4 of 11 Old 07-31-2017, 06:38 PM
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Originally Posted by Daniel Chaves View Post
Loved the Q&A but as a heads up that some of the upcoming 4k projectors do not have 3d playback example being the new 4k Optoma projectors are not offering 3d capability which is sad.

But very informative. I am also Apartment living so everything I have done I can undo, but I havent tried putting black fabric up on my ceiling just yet, what kind of clips would you recommend to secure the fabric to the ceiling so it doesnt fall down or losen over time and sag.
I use a staple gun.

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post #5 of 11 Old 08-01-2017, 10:05 AM
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Originally Posted by imagic View Post
I use a staple gun.
Ah Im not sure if that will work with my ceilings as I have that nasty popcorn ceilings. ^^;;

Do you see the silver staples or do they make black staples?

Projector: BenQ w1500 + ES Sable 135" Screen AVR: Marantz SR6011 ATMOS/DTSX + Darbee 5000s
Speakers: Polk Audio TSX550t (FL/FR), CS2 Series II (C), Monitor40 Series II (RL/RR),
Polk Audio TSx110B (Ceiling FL/FR RL/RR), (2) JL Audio 12" Subs + (2) Dayton 15" Subs + (2) ButtKicker LFE
Arrangement: 5.1.4 Source: OPPO UDP-203 4k Bluray Player, Roku 4, HTPC, Nexus Player
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post #6 of 11 Old 08-09-2017, 07:14 AM
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Ah Im not sure if that will work with my ceilings as I have that nasty popcorn ceilings. ^^;;

Do you see the silver staples or do they make black staples?
You could color the staples with a Sharpie prior to use
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post #7 of 11 Old 08-09-2017, 10:04 AM
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Originally Posted by dkfan9 View Post
You could color the staples with a Sharpie prior to use
I might just use something like this for a cleaner look and I can always take it down later.

http://www.fabric-wall.com/half-inch-track.aspx

Projector: BenQ w1500 + ES Sable 135" Screen AVR: Marantz SR6011 ATMOS/DTSX + Darbee 5000s
Speakers: Polk Audio TSX550t (FL/FR), CS2 Series II (C), Monitor40 Series II (RL/RR),
Polk Audio TSx110B (Ceiling FL/FR RL/RR), (2) JL Audio 12" Subs + (2) Dayton 15" Subs + (2) ButtKicker LFE
Arrangement: 5.1.4 Source: OPPO UDP-203 4k Bluray Player, Roku 4, HTPC, Nexus Player
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post #8 of 11 Old 08-12-2017, 12:22 PM
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no Dolby Vision for projectors

We have to remember how controlling Dolby is. With a DV TV, no user adjustments are allowed while watching DV content. Dolby is also the inventor of PQ with its absolute levels. (Optimizing the TV signal for only 12 bits, when there was no need to optimize it. A 16 bit 422 4k@ 24 fps fits within the HDMI 1.4 bandwidth).

So with projectors, with no guarantee of absolute brightness, it may be a non-starter for Dolby. Yet with DV movie theaters, they obviously have no issue with a 108 NIT max peak output.

IMHO, this is just a red herring, as one could have user inputs to state what max output you have, or a projector vendor could have an inexpensive sensor that measured peak brightness during a setup mode.

As to the advantage of dynamic metadata, (IMHO) the advantage is totally overblown. Any projector with dynamic iris now must be calculating on-the-fly the same peak and average white level per frame that is in the DV metadata. And then you can guarantee it's accurate.

So to me, the only real advantage to DV is 12 bit signals with no banding.
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post #9 of 11 Old 08-12-2017, 12:25 PM
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Originally Posted by rak306 View Post
We have to remember how controlling Dolby is. With a DV TV, no user adjustments are allowed while watching DV content. Dolby is also the inventor of PQ with its absolute levels. (Optimizing the TV signal for only 12 bits, when there was no need to optimize it. A 16 bit 422 4k@ 24 fps fits within the HDMI 1.4 bandwidth).

So with projectors, with no guarantee of absolute brightness, it may be a non-starter for Dolby. Yet with DV movie theaters, they obviously have no issue with a 108 NIT max peak output.

IMHO, this is just a red herring, as one could have user inputs to state what max output you have, or a projector vendor could have an inexpensive sensor that measured peak brightness during a setup mode.

As to the advantage of dynamic metadata, (IMHO) the advantage is totally overblown. Any projector with dynamic iris now must be calculating on-the-fly the same peak and average white level per frame that is in the DV metadata. And then you can guarantee it's accurate.

So to me, the only real advantage to DV is 12 bit signals with no banding.
TCL P-Series lets you choose dark or bright room with Dolby Vision, to adjust for ambient light. So that's not strictly true.

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post #10 of 11 Old 08-12-2017, 01:24 PM
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TCL P-Series lets you choose dark or bright room with Dolby Vision, to adjust for ambient light. So that's not strictly true.
Is that part of the PQ spec? Is it part of DV spec? Or is that just what a manufacturer decided to do?

And exactly what does it do in low vs high ambient?
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post #11 of 11 Old 08-12-2017, 01:30 PM
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Is that part of the PQ spec? Is it part of DV spec? Or is that just what a manufacturer decided to do?

And exactly what does it do in low vs high ambient?
I don't know what contracts TCL has with Dolby. Bright is brighter overall.
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