Immense AI, Camera and ISP Upgrades

New Hexagon 695 DSP: 4x Performance On New Tensor Cores - 15 TOPs Total on SoC

The Snapdragon 865 now ships with the new Hexagon 695 DSP block. The single biggest improvement of the new design is a massive quadrupling of the processing power of the dedicated tensor cores. This jump alone is able to double the SoC’s aggregate AI processing ability up from 7 TOPs to 15 TOPs.

Qualcomm here still doesn’t properly do a breakdown between the IP blocks which contribute to this number, but given that the GPU only saw a ~20% increase, and that the Hexagon’s scalar and vector execution units this year have remained the same in terms of performance, we estimate that the tensor units now roughly come in at around 10TOPs by themselves.

Qualcomm has also now included lossless weight and activation compression for the Tensor cores, being able to reduce bandwidth consumption up to 50%. This is a similar feature we've seen advertised by third-party NPU IP offerings, only that Qualcomm is going to be shipping this now in a product in just a few months.

Power efficiency of the block is also have said to have improved by 35%, making computations less costly in terms of battery life.

Qualcomm talks how about its inference performance and inference power efficiency is significantly higher than competing solutions. We don't know the comparison SoCs being showcased here, but a likely candidates here are the Apple A13 and the Kirin 990? It could also be an Exynos or other SoC.

New Spectra CV-480 ISP: 2 Gigapixels/s Enabling Massive Sensors

Aside from its 5G abilities, it’s very much evident that camera is very much at the very centre of the Snapdragon 865’s new features. The whole camera subsystem has seen some massive upgrades in the IP, and amongst the biggest improvements in capability lies in the new Spectra 480 computer-vision ISP.

The new IP has seen a major architectural change in that it’s now able to process 4 pixels per clock instead of just only 1 PPC as in the previous generation. This has now massively upgraded the pixel processing throughput to 2 Gigapixels/second, allowing the SoC a wide variety of use-cases that in the past simply weren’t possible due to lack of raw power.

Starting off with video capture, the new SoC is able to now record in 4K HDR while simultaneously capturing up to 64MP still shots at the same time. But 4K video isn’t the limit anymore – and you even can say that in terms of framerate as now 4K120 recording is supported, but the Snapdragon 865 now supports 8K30 video recording.

Video recording quality continues to support all the features we’ve seen in the previous generation, meaning 10-bit and various HDR standards such as HLG, HDR10, HDR10+, but now the new SoC expands this even further with the introduction of the ability to do live recording in the Dolby Vision HDR standard. Qualcomm explains that the Snapdragon 865 not only is the first smartphone SoC to be able to do this, but it’s the first camera platform of any kind in the world, as usual Dolby Vision content right now is enabled post-capture in the editing room, rather being something that’s being natively recorded by a camera.

The new improved capabilities of the ISP and video encoder also erase some current recording limitations, for example, slow-motion video recording at 960fps is sustained indefinitely instead of being limited to a couple of seconds of real-time footage.

Although normally I wouldn’t have brought this up, MediaTek’s recent release of the Dimensity 1000 did recently popularise the discussion topic: No, the Snapdragon 865 doesn’t support the AV1 codec for video decoding. It looks like we’ll have to wait for the next generation for that.

In terms of still capture photography, the new ISP performance will now allow for support for sensors of up to 200MP, which actually don’t yet exist as Samsung’s recent 108MP behemoth is currently the largest of its class right now.

The new ISP now has various new functionalities in order to improve noise reduction and contrast enhancements. Particularly the new noise reduction features is said to be quite difficult to achieve.

Although Qualcomm advertises the 200MP figure predominantly, it’s to be noted that actual capture with zero shutter lag (ZSL) is limited to 64MP – so there is a rather larger compromise in capturing at resolutions beyond 64MP.

High Refresh Rate Displays Normalised: Support For 144Hz

Already some vendors are leading the pack in 2019, but we’re expecting 2020 to see wide-range adoption of high refresh-rate displays. Even more importantly, we’ll be seeing implementations at high resolutions higher than 90 and 120Hz, supporting up to 144Hz displays. Qualcomm explains that the barrier that’s been lifted here is the SoC’s Display Processing Unit (DPU) that has had its throughput significantly increased.

I asked the company about the impact on battery life and which component of a phone accounts for the highest power increases. Surprisingly, it’s not any one component, with most of them seeing pretty much just an evenly distributed linear increase in power requirements, with the actual display panel itself (excluding the DDIC), seeing actually the least increases in power draw.

Cortex-A77 Cores, Adreno 650 GPU, LPDDR5 Memory The Snapdragon 765 SoC: Improved Premium With 5G, Conclusions
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  • Pro-competition - Thursday, December 5, 2019 - link

    "The X55 modem has had a lead time to market, being available earlier than the Snapdragon 865 SoC by several months. OEM vendors thus would have been able to already start developing their 2020 handset designs on the X55+S855 platform, focusing on getting the RF subsystems right, and then once the S865 becomes available, it would be a rather simple integration of the new AP without having to do much changes to the connectivity components of the new device design."

    Uh, why not just integrate the X55 into the S865 then?
    Reply
  • Kabm - Thursday, December 5, 2019 - link

    Well Samsung Exynos 990 for S11 also don't have 5G intergrated. So I guess they have to chose between 5G modem intergrated and new core Cortex A77. And even if they choose 5G they will need the latest 7nm EUV production line, which there are rumors of low yield. Reply
  • Nicon0s - Wednesday, February 19, 2020 - link

    "Uh, why not just integrate the X55 into the S865 then?"

    Qualcomm already explained why.
    Size constrains, power constrains which result in lower peak speeds. By integrated the 5G modem overall 5G speeds will be lower as you can see with the Kirin 990 5G.
    Reply
  • helloworld_chip - Thursday, December 5, 2019 - link

    From the article: "Apple’s iPhones always have had separate AP+modem solutions, and the latest generation this year had amongst the strongest battery life performance of any device out there, even with a competing Intel modem."

    Andrei, as what I can see from your iPhone 11 review, the comparison you made which shows great iphone 11 battery life is based on a WiFi test instead of 4G.. In such test scenario, modem shouldn't even be in the picture. How could that imply a separate modem doesn't make much power differences..? Is this a mistake?
    Reply
  • eastcoast_pete - Thursday, December 5, 2019 - link

    Thanks Andrei! Question about 5G: in Huawei's implementation in their 990 chipset, they apparently use one of their 2 AI core clusters to assist with beam forming and other 5G-related tasks. Does Qualcomm use its AI circuitry similarly, and is this the reason for the beefed-up AI on their new SoCs? Thanks! Reply
  • peevee - Thursday, December 5, 2019 - link

    "Qualcomm allows vendors to choose between LP4X and LP5 in their device implementations"

    BIG mistake, as most will choose to save a couple of $$ on $800+ devices with 865. Given the graphics is integrated, there are quite a few situations where perf is going to be memory-speed-limited.
    Reply
  • peevee - Friday, December 6, 2019 - link

    "No, the Snapdragon 865 doesn’t support the AV1 codec for video decoding. It looks like we’ll have to wait for the next generation for that."

    No, AV1 does not offer any PRACTICAL advantages over H.265 to 99.99%+ of consumers, so very very few people who care about that particular practically irrelevant thing will wait for that.

    Note the word PRACTICAL (I cannot emphasize it more on your comment software).

    More interesting (but also almost irrelevant at this point) thing would be what specific profiles of H.265 their codec supports.
    Reply
  • AidenP - Saturday, December 7, 2019 - link

    Oh,c'mon , stop already with this 5G hyper-ventilated-horse-beaten-to-death thingie .
    I think 4G is already more then enough for most regular user scenarios,and even all those radio waves (combined with normal radio-TV-2G-etc) are screwing our bodies already haha .
    A start to consider : https://www.youtube.com/watch?v=bG8f5kUpbcg
    Reply
  • HideOut - Saturday, December 7, 2019 - link

    I just hope that in the statse we'll actually be able to buy a phone based on the new 7xx chipset. We seem to get 6xx junk or strait to the overpriced 8xx stuff. No great upper midrange phones :(

    Please tell me the pixel 4a will have this!
    Reply
  • Wardrive86 - Thursday, December 12, 2019 - link

    The DRAM for the Snapdragon 855 in the table is labled wrong Reply

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