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posted by martyb on Wednesday May 20 2020, @07:40PM   Printer-friendly
from the put-your-whole-system-on-a-tiny-chip dept.

SD cards hop on the PCIe 4.0 bus to hit 4GB/s with version 8.0 of storage spec:

As outlined in a whitepaper [PDF] this month, the new spec will let existing SD Express and microSD Express cards employ PCIe 4.0 and NVMe to deliver a top speed data transfer speed of [3938 MB/s].

While the new spec is backwards-compatible, the latest top speed will only come with a card reader capable of connecting to the extra row of pins present on SD Express cards that support dual PCIe lanes.

[...] The good news is that SD Express and microSD Express cards can still get to 1970 MB/s on a device with a single PCIe 4.x lane under version 8 of the specification, and SD Express can get there with a pair of 3.x lanes. Which is rather faster than many SSDs and, as SD Express can climb to 128TB on a single card, a rather tasty storage option.

Also at The Verge, PetaPixel, and Yahoo! Finance.


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  • (Score: 2) by takyon on Thursday May 21 2020, @03:03PM

    by takyon (881) <reversethis-{gro ... s} {ta} {noykat}> on Thursday May 21 2020, @03:03PM (#997400) Journal

    H.265 tiers [wikipedia.org] include up to full 8K (8,192×4,320) @ 120 Hz.

    H.266 [wikipedia.org] will have support for 16K, 360-degree videos (not sure what that entails), and 48-bit deep color (16 bpc):

    In October 2015, the MPEG and VCEG formed the Joint Video Exploration Team (JVET) to evaluate available compression technologies and study the requirements for a next-generation video compression standard. The new algorithms should have 30-50% better compression rate for the same perceptual quality, with support for lossless and subjectively lossless compression. It should support resolutions from 4K to 16K as well as 360° videos. VVC should support YCbCr 4:4:4, 4:2:2 and 4:2:0 with 10 to 16 bits per component, BT.2100 wide color gamut and high dynamic range (HDR) of more than 16 stops (with peak brightness of 1000, 4000 and 10000 nits), auxiliary channels (for depth, transparency, etc.), variable and fractional frame rates from 0 to 120 Hz, scalable video coding for temporal (frame rate), spatial (resolution), SNR, color gamut and dynamic range differences, stereo/multiview coding, panoramic formats, and still picture coding. Encoding complexity of several times (up to ten times) that of HEVC is expected, depending on the quality of the encoding algorithm (which is outside the scope of the standard). The decoding complexity is expected to be about twice that of HEVC.

    On top of everything you mentioned, there is High Dynamic Range, which may or may not eat into that color depth. I think it depends on the standard.

    AV1 looks similar to H.265. Nobody knows what AV2 will add yet, but it will probably be more of the same.

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