Gran Turismo 7 PS5 Pro Update: 8K Graphics, Real-Time Ray-Tracing On Track

[VR-SORN]

Which is why I prefer to watch on BluRay, which is why PS5 needs a disc drive :s
Streaming is simply the ugly last choice.

I find Blu-ray too compressed. The original standard anyway. I havent seen the 4k ones. I got really distracted by the colour banding.

xDriver69x​

Would you like to wager? Or shall I just help educate. There are RAW 8K video cameras, and have been for many years. What you think and what is might not be the same thing.

You just linked a compressed stream lol.

 

[i386]

The previous poster indicated 8k60 was impossible unless compressed on HDMI.

You can calculate the required (uncompressed) bandwidth yourself

Required Bandwidth = Pixels (per X-Axis) * Pixels (per Y-Axis) * Bits per color channel (8 for sdr, 10 for HDR) * 3 Channels (Red, Green, Blue) * Frames Per Second or HZ

Spoiler

Example with 4k, hdr and 120hz:
3840 (pixels on x axis) * 2160 (on y axis) * 10 (hdr) * 3 * 120 = 29,859,840,000 Bit per second (~29 GBit/s)

Example with 8k, sdr and 60hz:
7680 * 4320 * 8 * 3 *60 = 47,775,744,000 Bit per second (47 GBit/s)

hdmi 2.1 (including 2.1b) offers maximum of 48GBit/s total bandwidth, but only 42 GBit/s are usable for data. the rest is used to balance the voltage.

 

[Sir Crashalot]

Would you like to wager? Or shall I just help educate. There are RAW 8K video cameras for consumers, and have been for many years. Pro Grade 17K gear is even so much better. What you think and what is might not be the same thing.

Yes, it's possible, but it will never be a thing for any commercial service or medium. DVDs weren't uncompressed, BluRays weren't uncompressed and no streaming service, be it YouTube, Netflix, Amazon Video, Disney, Hulu, Pornhub or whatever offer any uncompressed videos AFAIK. So yes, streaming uncompressed 8K may be possible (even now? Not sure about the bitrate/required bandwith) but as I said, it won't be a thing for any commercial service. So maybe we're just talking about different use cases.

-edit- Found a bandwith calculator, but didn't check if it's correct. It says that the required bandwith for uncompressed 8K with 60FPS is ~47746 Mbps

-edit2- @i386 made the calculation himself, so it looks like it's correct.

 

[VR-SORN]

i386​

You can calculate the required (uncompressed) bandwidth yourself

Required Bandwidth = Pixels (per X-Axis) * Pixels (per Y-Axis) * Bits per color channel (8 for sdr, 10 for HDR) * 3 Channels (Red, Green, Blue) * Frames Per Second or HZ

Spoiler

Example with 4k, hdr and 120hz:
3840 (pixels on x axis) * 2160 (on y axis) * 10 (hdr) * 3 * 120 = 29,859,840,000 Bit per second (~29 GBit/s)

Example with 8k, sdr and 60hz:
7680 * 4320 * 8 * 3 *60 = 47,775,744,000 Bit per second (47 GBit/s)

hdmi 2.1 (including 2.1b) offers maximum of 48GBit/s total bandwidth, but only 42 GBit/s are usable for data. the rest is used to balance the voltage.

Spoiler

Despite those calculations and data capacities, compression is not used to achieve 8k60 support.
Its on the HDMI link I quoted earlier.

Here is more evidence:
FRL
Fixed Rate Link allows for these transfer rates:
8k60 8bit 32gbps
8k60 10bit 40gbps
8k60 12bit 48gbps

 

[xDriver69x]

Wow there's a lack of something/shun or just to talk past or ego stroke goins on here.

Compression is only relevant when looking to optimize transmission through a bandwidth limited pipe or coupled with encryption for DRM. Folks didn't and still don't fight against DRM so you got it everywhere and that means encryption which includes compression.

Compression is not relevant though unless you are an engineer trying to get throughput concerns resolved.

Quality is what is relevant, and guess what. There are lossless compression algorithms (Huff, Magic, FF, even VP9 has lossless) so there is absolutely ZERO difference in a batch of frames that took a full 48*Gbps* amount of bandwidth and the same lossless compressed batch of frames that used 15 - 45*Mbps*.

Now there is also latency, any work done on a signal introduces latency for any reasonable discussion. encryption/compression adds latency. RAW signals ( aka professional recording ) or in your own home studio, use the full maximum signal bandwidth and take up an enormous amount of space. terabytes vs gigabytes for a movie, and again, ZERO quality difference. You can store and playback RAW video footage with VLC. Get your gluster ready.

Now games care about latency, movies do not. Games use trickery to try to offset this, like disabling HDCP. And because the frame/signal generation is dynamic, things like VRR are utilized to reduce quality issues.

I suspect this might still not be clear as day, and I'm sure someone will go off on a tangent despite trying to help clear the muddy waters, but forums.. forums never change.

 

[tankuroded]

Just look at the Steam Arbitration agreement high priority mess unfolding today.

Did you actually read the announcement? That change actually is a reverse of binding arbitration trend that companies have been pushing, by the way.

 

[xDriver69x]

Did you actually read the announcement? That change actually is a reverse of binding arbitration trend that companies have been pushing, by the way.

I'm very much aware and I might encourage some education on the matter, it's an attempt to circumvent current goings on and buy more time and force more costs to get resolved: https://www.masonllp.com/case/valve-mass-arbitration/