5th Generation APU/NPU, a Massive ISP, and New 5G & WiFi

APU/NPU AI/ML Upgrades

Moving away from CPU and GPU, we find MediaTek’s new “APU”, or AI Processing Unit, or rather NPU as we more generically tend to call it nowadays. MediaTek always had one of the earliest in-house implementations of such an IP, and the Dimensity 9000 now implements the 5th generation of such an IP.

MediaTek promises a +400% performance and power efficiency improvement over the previous generation Dimensity 1200 implementation, which is quite a step-up, however should be contextualised to other more performant competitor platforms.

The company had made one slide available of showcasing MLPerf against Apple’s A15, noting +108% at +75% power efficiency versus the iPhone chip, the company here actually quoted our own published MLPerf figures, however we’ll avoid using the slide as the comparison isn’t great as the iOS variant of the app isn’t fully optimised and doesn’t take advantage of CoreML acceleration.

A more apples-to-apples comparison would be the ETHZ Ai Benchmark across Android devices, here the chip should take advantage of all accelerator blocks including CPU, GPU and NPU, and the Dimensity 9000 is advertised to beat the Google Pixel 6 and the Tensor SoC, which recently had notably outperformed the competition. MediaTek doing even better here seems to be promising for ML performance of the SoC. Naturally, we’ll have to see more detailed benchmarks for a more thorough analysis of the ML performance, but it seems MediaTek has developed a quite solid contender here.

Media Pipelines & Massive ISPs

Moving onto the media side of things, MediaTek also throws in everything but the kitchen sink into the new SoC. We’ll get to the ISP in a bit, but in terms of video encoding and decoding, MediaTek supports all popular current codecs. There is no AV1 encoding yet, but the company says that the chip is the first in the industry to support 8K AV1 decoding – previous generation Dimensity and competitor SoCs only are able to do 4K decoding at the moment.

The display pipeline supports WQHD+ to 144Hz, or FHD+ to 180Hz with full HDR+ Adaptive (10-bit), so the chip should power the highest resolution and refresh rate screens out there.

Getting back to the ISP, MediaTek claims that the camera subsystem is massively revamped in this generation. The Dimensity 9000 features triple ISPs with the ability for concurrent operation, with the chip being able to push through 9 Gigapixels/s. We’re not sure exactly if the figures are comparable across the vendor claims, but Qualcomm’s Snapdragon 888 “only” supports 2.7GPixel/s. Interestingly enough MediaTek says this is only a 2x throughput increase versus the Dimensity 1200.

The Imagiq790 ISP claims to be the world’s first to support 320MP sensors and MediaTek claims they’re working closely with the sensor vendors to enable such functionality. We’ve heard last year about 200MP sensors when Qualcomm announced the Snapdragon 888, and in September Samsung had announced the HP1 at this resolution, though we haven’t seen devices with it yet.

In triple-camera operation, the ISP supports concurrent 32+32+32MP sensor operation. We’ve seen such operation become more popular in sensor-fusion like scenarios for computation photography, or concurrent video recording on multiple sensors.

The new ISP also vastly improves its capabilities in terms of bit-depth, as MediaTek now upgrades it to a full 18-bit pipeline. Although mobile image sensors today natively are barely 10- or 12-bit at most in terms of their ADC bit-depth, multi-exposure image stacking has become the norm, especially with sensors now also getting more advanced HDR techniques such as staggered HDR captures. The new higher bit-depth ISP now is able to better do exposure merging across multiple frames, with the Dimensity 9000 able to do 270 frames per second (at presumably 4K resolution) across three sensors on its three ISPs.

The raw throughput and processing power here would be immense, and a massive leap over any other current SoC in the market.

MediaTek says that they’ve improved the video pipelines as well, being able to tightly interact with the APU in a memory coherent fashion, bypassing the need to copy data over DRAM, increasing performance and decreasing bandwidth requirements and latency. Presumably vendors would be able to take advantage of the architecture to implement video recording with ML-based image processing models on-the-fly, essentially the same kind of technology Google had presented on its recent Pixel 6 phones and the Google Tensor chip.

Upgraded 5G Modem

On the modem side, MediaTek has had quite a lot of success with its recent 5G modem implementations. The new Dimensity 9000 modem upgrades things even further, advertising for the first time 3CC carrier aggregation with up to 300MHz of Sub-6 bandwidth, allowing for download speeds of up to 7Gbps.

The modem is fully compatible with 3GPP release 16, with one larger change being UL Tx switching, which allows for better uplink capabilities and utilisation of spectrum in multi-band 5G NR deployments.

MediaTek notes that its modem has been extremely power efficient compared to competitor products, and the Dimensity 9000 will continue on this patch by providing advanced power saving technologies.

Although the modem features all the bells and whistles for Sub-6 5G, it does still lack mmWave. MediaTek notes that this is simply a result of the market need and the company’s current customer focus. Currently, the US remains the only market where mmWave truly remains a critical feature, as most vendors opt to not even equip their global device variants with mmWave modules. The company admits that due to this, we’ll unlikely see US devices powered by the Dimensity 9000, and the company is fine with that compromise, as it tries to cater to and focus on vendors which serve the rest of the world. MediaTek noted that next year, we will see mmWave product announcements for the US market, but these will at first be in the low/mid-range line-up.

Finally, on the Wi-Fi side, MediaTek’s Dimensity 9000 platform also comes with their own in-house solution, now supporting Wi-Fi 6E for 6GHz band support, and 160MHz channel bandwidth, as well as Bluetooth 5.3. The GNSS solution now adds BDS-3 connectivity via B1C signals.

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  • Silver5urfer - Thursday, November 18, 2021 - link

    MediaTek is the worst offender in GNU GPL v2 Linux Kernel guidelines, their junk always ends up being abandoned by OEM and Modding community as well. Until they can beat CAF of Qcomm, they are junk.

    All that is just the new ARM IP talk simply getting it first to market that's it makes sense since it's a Taiwanese corporation so TSMC is allowing them on this first dibs ?, and the worst part of these ARM processors including Apple is omega AI capabilities this that and woahh but what do they provide for end user ? Nothing. Android barely has any APIs that allow the developers to do something, mostly these AI stuff is used for ISP and Camera and other camera gimmickry. Once Apple launches their Auto Hash scanning on their platform everyone will soon follow, Google loves to ape Apple so they will be first irrespective of how hard it is on Android due to Play Services and all the different vendors.
  • Moomoo123 - Thursday, November 18, 2021 - link

    Yea... basically a garbage CPU manufactured with stolen Intellectual Property/Tech from a garbage communist country. Wait for the Qualcomm's lol.
  • anonomouse - Thursday, November 18, 2021 - link

    just a small note for your bigotry: this company is Taiwanese. not communist. not sure what is supposed to be "stolen" here either.
  • R0H1T - Thursday, November 18, 2021 - link

    You hear that sound, no? Let's try it again, slowly ~ Whoooosh 👍
  • logoffon - Thursday, November 18, 2021 - link

    I can't hear that either.

    In seriousness, I don't think that's how you make fun of people who don't get a joke.
  • Unashamed_unoriginal_username_x86 - Thursday, November 18, 2021 - link

    How do you know it's a joke? If I said something stupid and edgy too, would you come to my defense as well?
  • nandnandnand - Friday, November 19, 2021 - link

    Sounds like a crash landing to me.
  • Spunjji - Friday, November 19, 2021 - link

    Awfully bold of you to assume that was a joke
  • Kangal - Friday, November 19, 2021 - link

    I agree with the others, the comment section here has derailed and turned into poo.

    There is A LOT here to commend MediaTek for.
    But they have five major criticisms that they need addressing for them to match Qualcomm, let alone exceed Apple.
    1- Make sure this is not another vaporware or paper-launch. Pump these chips out. We want to see your FLAGSHIP product out there and in tens-of-millions units in use by consumers.
    2- Quit that nonsense about cheating in graphs, benchmarks, and false showings. It doesn't lift you up, it drags everybody down.
    3- Provide drivers, source-code, documentation, and be very GPLv2 friendly. Support third-party developers, give bootloader unlock codes, and generally make consumers happy.
    4- Officially announce and support their chipset for long-term (min x4 AndroidOS Platforms/3+ years update)
    5- Focus on refining your product. Be willing to lose marketing points, or even the performance crown if it means having a better device for users/higher efficiency and very little throttling. Work on those drivers, Adreno is killing it out there compared to Mali.

    Hopefully you'll swing by the right direction. We will be watching, and hoping you do. Best of luck 👍
  • Dizoja86 - Friday, November 19, 2021 - link

    If he thinks China is communist because the political party has it in the name, he probably also genuinely believes that the Nazi's were socialists.

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