derf_

12 ms·

121.
by derf_ 2y ago
Technically, AV1 also uses Hadamard in the lossless modes.
122.
by derf_ 2y ago
A DST is optimal when the variance of the signal you are compressing grows linearly (as opposed to the DCT, which is optimal for uniform variance). That happens, for example, when you have a prediction on one side (e.g., intra prediction in
123.
by derf_ 2y ago
This is a great reason to not put all of your financial eggs in one basket. You hear stories around here all of the time about people's businesses being ruined by Google's automated abuse systems and lack of customer support. Ther
124.
by derf_ 2y ago
> Well obviously, you just write tests for the tests. :3 I had a friend whose first job out of school (many years ago) was part of a team at Intel assigned to write tests for their testing tools. When it matters enough economically, it
125.
by derf_ 2y ago
At the Meguro Parasitological Museum [1], they have an 8 meter long tapeworm [2] extracted from a human. Yes, that is an extreme example and still less mass than a person, but they can get large. [1] https://www.kiseichu.org&#
126.
by derf_ 2y ago
I have a very simple approach to evaluating if a subscription is worth it: I multiply the price by 20 times the annual cost [1]. If it is monthly, that is 240 times. If that is too hard for quick mental arithmetic, 250 is pretty close (di
127.
by derf_ 2y ago
> PayPal used two small (less than $1) transactions and the verification that I own the bank account was verified by correctly identifying the two transaction values. Based on my experience with (non-PayPal) financial institutions in t
128.
by derf_ 2y ago
> All of this is publicly visible and opens a lot of opportunities to harvest slippage etc. (lookup MEV-bots) Basically, people can front-run your trades, and this is built into the market by design. Also, instead of the winner being t
129.
by derf_ 2y ago
Management is usually heavily compensated via the stock of the company they are managing, precisely to align incentives and overcome conflicts of interest like that.
130.
by derf_ 2y ago
The continental US is 8.08 million km^2 [0], while Europe is 10.18 million km^2 [1], almost 26% larger. Even adding the non-contiguous regions does not make the US bigger (still just 9.83 million km^2) [2]. [0] https://en.wikiped
131.
by derf_ 2y ago
> It's true that the buyer has negative expected value money wise and the seller positive one... This is obviously the insurer's goal, but in practice competition and relaxing underwriting standards to win business means that
132.
by derf_ 2y ago
It is less about any of the terms being individually outrageous, the point is more that there are sixty-three pages of them. They were clearly boilerplate forms, from several sources (hence the overlap and contradictions), "If any te
133.
by derf_ 2y ago
My last lease in California consisted of 24 documents and addendums totaling 63 pages of dense legalese. Some of those were disclosures required by California law, but most were putting obligations on me (sometimes overlapping and contradic
134.
by derf_ 2y ago
Yes. "Cancer" is over 100 different diseases, all with different pathologies: https://en.wikipedia.org/wiki/Cancer#Research
135.
by derf_ 2y ago
According to https://www.sec.gov/ix?doc=/Archives/edgar/data/0001652044/0... their stock-based compensation expense was $15.539b in 2023 (and actual repurchases were $2.324b).
136.
by derf_ 2y ago
From my time working in defense contracting, quite a lot of the software was open source, built on open source components (just like everything else) or even hosted on official military GitHub repos. Code written by the (federal) government
137.
by derf_ 3y ago
A slightly more common way to express "field of view" is "module pitch", measured in pixels between adjacent module centers. I went back and tried to express the numbers from Figured 6 as a module pitch, and I think it w
138.
by derf_ 3y ago
That was a nice read. > I also tested only one background image, so the behaviour may differ greatly with QR codes contained in different surrounds. This likely does not matter much. It could theoretically affect binarization near the
139.
by derf_ 3y ago
One of my friends started a website called "The Mortgage Lender Implode-O-Meter" to track all of the mortgage lenders going bust... in 2006. It is worth remembering that cheap credit with adjustable rates is what fueled that bubbl
140.
by derf_ 3y ago
I have a 9-year and a 10-year stint on my resume. I am not looking for a job, though.
141.
by derf_ 3y ago
I have used CORDIC to compute fixed-point log/exp with 64 bits of precision, mostly because I wanted to avoid having to implement (portable) 64x64->128 bit integer multiplication in C. It is probably still slower than doing that, bu
142.
by derf_ 3y ago
> For radio links like Bluetooth it's possible to deal with some bit flips without throwing the entire packat away. Opus was intentionally designed so that the most important bits are in the front of the packet, which can be bette
143.
by derf_ 3y ago
The article mentions needing to sign some paperwork about equity in passing, but I think being asked to sign new paperwork (a new IP agreement, etc.) is a sign all on its own. Like the focus on security, it is suspicious if it happens witho
144.
by derf_ 3y ago
The PLC intentionally fades off after around 100 ms so as not to cause misleading hallucinations. It is really just about filling small gaps.
145.
by derf_ 3y ago
Dropping PVQ was a hard choice. We did an initial integration into libaom, but due to substantial differences from the way that Daala was designed, the results were not outstanding [1]. Subsequent changes to the codebase made PVQ regress si
146.
by derf_ 3y ago
Usually the issue is not using the YCgCo-R colorspace. I do not see enough details in the article to know if that is the case here. There are politics around getting the codepoint included: https://github.com/AOMediaCodec&#x
147.
by derf_ 3y ago
> ... very little that wasn't in VP10 made it into AV1. I am not sure I would say that is true. The entire entropy coder, used by every tool, came from Daala (with changes in collaboration with others to reduce hardware complexity
148.
by derf_ 3y ago
The Bookings options are explained in the Bloomberg article. They use offsetting bets so that one generates a large gain and the other generates a large loss (either way the stock moves). Then the gain is offloaded through an in-kind redemp
149.
by derf_ 3y ago
> ...otherwise there would be no provision for a monopoly over the commercial manufacturing of the invention. You should always be able to make your opponent's arguments at least as well as they do, as that is the first step to ov
150.
by derf_ 3y ago
This is in fact how ZBar works, see zbar/scanner.c (source: I am the original author of the ZBar QR code support, and I was pretty envious of how easy 1D codes are, conceptually).

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