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Xperia XZ (4k screen with 960 fps slowmo camera)

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  • #16
    Originally posted by Belimawr View Post
    The new Samsung memory chips firms are starting to use actually has incredible read and write speeds, so it shouldn't be a problem
    Yet, it is. It's the same reason photo cameras are limited in FPS and duration on their "burst" modes.

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    • #17
      Do the read/write speeds stay consistent over small fractions of a second?

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      • #18
        it's more to do with the conversion of the file than the read write speeds, if you are capturing raw (as they do before all the other crap the software does) the files are way larger then you have the added overhead of the things like the chips Sony likes to put in the way of their cameras connection to the CPU, so the limit is likely a product of the hardware setup.

        also likely why dedicated cameras have the same limitations as they sit using only the photo processor, if firms started putting things like the high end snapdragon chips or samsung using it's exynos chips in cameras they could likely do a lot more as all that power could be focused to a singular task.

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        • #19
          I just watched the video on that BBC link and they said that the limitation was the size of the memory specially put into the sensor to capture at the high frame rate. I guess it's more limited on the phone because of cost and the fact its a phone (size). So presumably this could be improved on something bigger and more expensive.

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          • #20
            the phones will generally have higher tech in, it's the same when people went on justifying the price of VR despite the fact it is only a phone in a different case. the sad fact is phones actually have some of the best technology going in handheld devices, the only reason stuff like specialist cameras are better is because they are designed for a single purpose and in the case of cameras they can make them much bulkier to allow better lens configurations to improve quality, the technology isn't better it's just more focused, the cameras have nowhere near the processing power of a phone, they also lack the screen quality of high end phones, as said the difference comes they have more space from where they place the sensor to the front of the camera so instead of having to fit a lens array into maybe a couple of millimeters they can do it in centimeters or even inches in the case of high end cameras so they can fit far more in.

            the sensor at the back will often just be the same, it's just how it's utilised.

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            • #21
              Originally posted by Alm View Post
              Do the read/write speeds stay consistent over small fractions of a second?
              Well it's because the data's written to the much faster memory of RAM before being moved to more permanent but slower storage. When lots of frames or high resolution photos need to be written fast it uses the RAM storage. But its memory is small so gets filled up quickly, which is what leads to the limitations.

              Edit: Although as you say in this case it's memory in the sensor itself that acts as the buffer.

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              • #22
                Originally posted by Burglar View Post

                Well it's because the data's written to the much faster memory of RAM before being moved to more permanent but slower storage. When lots of frames or high resolution photos need to be written fast it uses the RAM storage. But its memory is small so gets filled up quickly, which is what leads to the limitations.

                Edit: Although as you say in this case it's memory in the sensor itself that acts as the buffer.
                as I said it is a favourite Sony trick they put stuff in the way of the camera, the Z1 and a few other phones had quite bad post processing and it was purely down to the fact Sony put a chip between the camera and the phone and lead to all the problems but due to the way it was rigged there was no way to ever remove it or change it to make it better. it's Sony's biggest problem, they make good stuff but then often don't use their best in their devices and often trial other things that don't always play out.

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