Stories
Slash Boxes
Comments

SoylentNews is people

SD Cards Hop on the PCIe 4.0 Bus to Hit 4GB/s with Version 8.0 of Storage Spec

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

upstart writes in with an IRC submission for carny:

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.

Original Submission

 
This discussion has been archived. No new comments can be posted.
SD Cards Hop on the PCIe 4.0 Bus to Hit 4GB/s with Version 8.0 of Storage Spec | Log In/Create an Account | Top | 12 comments | Search Discussion
Display Options Threshold/Breakthrough Mark All as Read Mark All as Unread
The Fine Print: The following comments are owned by whoever posted them. We are not responsible for them in any way.

  • (Score: 2) by bzipitidoo on Thursday May 21 2020, @01:29PM (2 children)

    by bzipitidoo (4388) on Thursday May 21 2020, @01:29PM (#997363) Journal

    Raw video? Outside of movie studios, who uses raw video? It's too big. Just 1 minute of HDTV quality (1080p), uncompressed, at 30 frames per second, and assuming true color (24 bits per pixel), no audio, is roughly 11G of data. A 90 minute movie would require 1T of storage.

    Crank that up to 8K at 60 frames per second, and 48 bit "Deep Color", and the storage requirement is 64x more. Or, 128x more for 120fps. Throw in a 2nd camera for stereoscopic vision for 3D video, and that's another doubling. And I understand there's talk of going up to 16K resolutions some day. Lossless video compression (lossless H.265) can reduce storage requirements to very roughly 10%. 10% of 256T is still an awful lot of data.

    Starting Score:    1  point
    Karma-Bonus Modifier   +1  
    Total Score:   2  

  • (Score: 2) by takyon on Thursday May 21 2020, @01:43PM

    by takyon (881) <takyonNO@SPAMsoylentnews.org> on Thursday May 21 2020, @01:43PM (#997368) Journal

    I would have to do a bit more research to see what storage standards cinematic 6K+ cameras are using these days. Maybe this helps make SD more relevant to that market, maybe not.

    For filming with drones or action cameras (GoPro), SD Express or microSD Express is relevant. Less weight helps, less power usage helps. FPS can be very high for recording slow-mo shots. Apparently, GoPro does up to 240 FPS 720p/1080p, I could have sworn there was a 720 FPS model out there.

    Based on my crapculations, the ultimate target for 360-degree video cameras should be around 32K resolution [soylentnews.org], with VR headsets displaying 16K resolution (1/4 of the sphere with very wide/tall FOV).

    --
    [SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]

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

    by takyon (881) <takyonNO@SPAMsoylentnews.org> 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.

    --
    [SIG] 10/28/2017: Soylent Upgrade v14 [soylentnews.org]