Here's the full list of the measurements files I got during #MWC15 over 5 days, as I just finished sorting and checking them

.chc files contains data formatted for HCFR
.amf is for "all measurements file" (YAML dump)
.3dm is for "3D measurements" (YAML dump)
-Reference=5 are the readings I make at the end with a spectrophotometer to serve as correction matrix for the (faster) colorimeter measurements.

For each measurement run, that's 602 colorimeter readings and 5 spectrophotometer readings (saving XYZ values and spectral data for later usage)

That's 24 runs in total, each taking something approximately between 25 and 40 minutes depending on the setup time.

It encompass also 13 different devices in total:

– Samsung Galaxy S6 (2 units, multiple modes)
– HTC One M9 (2 units)
– Nokia N1
– Gionee Elife S7
– Asus Zenfone 2 720p
– Asus Zenfone 2 1080p
– Saygus v2 (prototype)
– Huawei Honor 6 Plus
– Huawei Ascend 7
– Lenovo VIBE Shot
– Nexus 6 (I didn't have this one yet)
– Meizu MX4 Ubuntu
– Lenovo A7000
– Panasonic CM1 (2 units)

Now that's a lot of high precision data to analyze ๐Ÿ™‚

#supercurioBlog #MWC #display #measurements

Private Paste – Pastie
supercurio / François Simond’s MWC 2015 display measurements list. Samsung Galaxy S6, unit 1, 100% brightness, adaptive display, 2015-03-01_20-02-03-Grayscale=256-NearBlack=11-NearWhite=11-Components-Saturations=17-3D LUT Generator=216.amf. Samsung Galaxy S6, unit 1, 100% brightness, …

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Today, day 3 at #MWC15 was great!

I progressed with the measurements TODO:
– Huawei Honor 6 Plus
– Huawei Mate 7
– Asus Zenfone 1080p standard and with white point tuned to warmer, after the 720p variant measured in different modes yesterday as well
– Saygus V2: I spent so much time talking there too with a very open-minded product manager who selected most of the device's components
– Lenovo VIBE Shot
– Nexus 6, because I didn't had it yet

What didn't work out:
– Sony who refused anything I needed on all their Z3 and Z3 compact running lollipop, the Z4 tablet and M4 Aqua (not a very promising device BTW), I even got annoyed a little bit.
– LG GFlex 2: all of them were running a custom build for MWC, preventing WiFi to work properly which I need for my portable lab.

Then I had the chance to meet by accident +Jeremy Meissโ€‹, +Chainfireโ€‹ and a nice +Paranoid Androidโ€‹ developer I'm very ashamed to have forgotten the name.

There's still a lot in the list, but it was a productive day.

#supercurioBlog #MWC #measurements #display #color


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Some more +Samsung Mobile Galaxy S6 exclusive hardware analysis, on audio and camera!

The audio codec used is Cirrus Logic / +Wolfson Microelectronics WM1840, which is not a part listed on their public website and also rather elusive on the web.

As there's outputs named HPOUT1L to HPOUT3R, I would guess that it's equipped with 6 DAC channels to line/or amplified headphones out, and from with the same approach 4 DAC channels to speaker out.
I count as well 4 audio input interface (from the CPU to the codec), 2 stereo ASRC, 2 stereo DRC, and DSP count goes from 1 to 7.
Well you got the point, lots of channels and mixing capabilities ๐Ÿ™‚

Galaxy S6 audioflinger native sampling frequency is 48kHz.
I didn't evaluate the quality of the resampler yet.

The back camera sensor is confirmed to be a Sony IMX240, the same as rumored and already present in the Note 4.
It means the additional features compared to its bigger brother come from ISP capabilities, not the sensor itself.

#supercurioBlog #MWC #samsung #audio #teardown

Codecs – Smart Codecs with Integrated Programmable DSP, Portable Codecs, Mono/Stereo Codecs, Multichannel Codecs, AC ’97 and HD Audio Codecs, Noise Cancellation Codecs
Part, DACs / ADCs, Dynamic Range (dB), THD+N (dB), Sample Rate (kHz), Analog I/O, Power Supply (V), DSP and Other Features, Package. WM8281Buy Now Sample, 8 / 6, 121 DAC; 100 ADC, -92 DAC; -89 ADC, 192, Single-ended. Differential, VA = 1.7 to 5.5; VD = 1.14 to 1.9, Multi-Core, 600 MIPS …

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Today, #MWC14 last log:

In terms of smartphone displays I measured:
– Gionee's Elife S5.5
Quite incredible super thin device from a manufacturer you might have never heard of, but who realized something that forces respect.
At 5.5mm, it provides the same battery capacity as the 8.59mm Nexus 5.
S5.5 display is a Super AMOLED 1080p that looked similar if not identical to the Galaxy S4 one.
Camera sensors and app are quite convincing (5Mp front) with plenty of cool & advanced features that are actually usable.
I also grabbed a Voodoo Report from it as I'm curious about it's Octacore Mediatek SoC.

– A Firefox OS Huawei smartphone, the Y300.
In the middle of other new Firefox OS devices, I picked this one as its display is IPS and for the price I must say it doesn't look bad at all. Incredibly better than its siblings using TN displays for sure.

– Nokia Lumia 1520
I'm sure you know about this one already.
Lumia's display is quite impressive in person so I had to take readings about this.
For the record, I had to modify my measurement HTML5 app because IE browser was caching AJAX requests more than anticipated ^^.
Cache-control headers did the trick.

– Nokia Lumia Icon
Probably the most interesting and usable Lumia smartphone at the moment. It's the same hardware platform as the 1520: S800 / 1080p display but using a 5" Super AMOLED instead of 6" IPS.

– Xiaomi Mi3
Qualcomm's booth had a pretty amazing collection of Snapdragon-equipped device.
Because, you know.. they're very much in most smartphones those days ๐Ÿ˜€
I had little time left in the end but still measured this one as it's not so easy to get a hold of it, and also the display and it's factory calibration were pretty convincing and I look forward processing the measurements to confirm some very quick first impressions.

Today was also the opportunity to spend more time with +Richard Lai, who demonstrated extraordinary group hug capabilities then accompanied me to +Ubuntu booth.

Good folks at Canonical appreciated this original usage of Ubuntu touch.
− the Nexus 7 in these pics, driving a colorimeter and a spectrophotometer using my app runs under the ARM & touch oriented port of this Linux distribution.
I tried to made a demo for them and despite an alpha development stage, if everything worked perfectly during the show it didn't for a demo to them.
Oh well, typical ๐Ÿ˜€

Today was also the opportunity to talk with +Qualcomm engineers. I spent hours in total the last 3 days talking with a senior product manager and a software engineer specialized in hardware video processing and scaling algorithm.
Both were as knowledgeable as it gets and knew everything about display calibration as well, which was refreshing as not common.

Qualcomm will take a closer look at my Nexus 7 display calibration development drivers & algorithm, they were surprised I was able to do what I'm working on already without their help, and recognized it's a valuable usage of their silicon ๐Ÿ˜‰

At the end of the day I had the privilege to meet, talk and shake hands with +Mark Shuttleworth who actually knows a lot as well about display calibration and why mobile OS should be capable in this area as well.
His mention of color accuracy on Ubuntu Edge introduction video was no accident.

In the next days I'll process the spectral and reference color data from the spectro sensor to get correct the colorimeter readings from all those displays and share that with you.

Already I must say see a positive trend since last year.
Higher resolution displays yes but also more capable of reproducing the full color gamut − sometimes too much.
Most manufacturers seem to buy factory calibrated panels but some still downgrade them with uninspired processing.
Overall it's pretty positive and this was an awesome, far too short MWC

#supercurioBlog #display #measurements #MWC

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In Album 2014-02-27

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Measuring +Sony Xperia Tablet Z2 in a private media booth

I made sure taking a good sample device – that's still a prototype as some had completely yellow displays ๐Ÿ˜‰
The one I have here should be most representative of the final product hopefully.

I'm curious about this tablet because the gamut seem wide as well, however there's something going on with the saturation I don't like too much.
Well, measurements will tell ๐Ÿ™‚

Also I get to measure 2 more Z2.

#supercurioBlog #display #measurements #MWC


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Early measurements results of a +Sony Xperia Z2, captured from +Erica Griffin computer screen as she couldn't wait to see the results

I'm impressed by the capabilities of this device so far.
Gamut is large, comparable to Super AMOLED displays.
On the Z2 devices demonstrated in Barcelona, there's no chroma saturation boost added. If color seem plenty intense they don't look too over-saturated like we've seen often on Samsung wide gamut panels.

A bit later I'll publish the full measurements corrected based on a reference spectrophotometer, for precise color temperature and gamut evaluations.
Also, planned : wavelength spectrum to look even more in depth into this new +Sony backlight technology!

#supercurioBlog #display #measurements #MWC


In Album 2/24/14

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