> otherwise you can't react

I'm far from neuroscience, but humans don't need to operate at 20Hz to drive a car. And human reaction latency (event to measurable action) is often over 1s (under 1Hz).

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chaos_emergent an hour ago | parent | next [-]

The reaction latency you’re referring to for humans includes perception, planning, and actuation, I’d separate that from the concerns of the hardware, which are mostly about actuation frequency.

From what I understand about AV (as a non-expert!), all three of those steps happen at different clock rates, ie you have a planner that’s updating continuously with observations from sensors at one rate, that planner then issues actions that get picked up by the actuators at another rate.

In that sense 20hz should really be compared to human reflexes without perception and planning; in scenarios where one is anticipating an action, response time can be as low as 150ms. in that context, I think 50ms/20hz is plenty reasonable for an automated driver.

	▲	gpm 24 minutes ago \| parent [-]
		In circumstances where one is maintaining grip or muscle tension (e.g. steering a car) I believe human response time can be more like 50ms. Which perhaps unsurprisingly lines up with the 20hz figure pretty close to exactly (we built cars controls so that they're controllable by human reflexes). Though you can't convert between hz and latency, all 20hz tells us is that it adjusts 20 times a second, not how long it takes from sensor input to be fed into a particular choice of adjustment, there could be (and actually almost certainly are) multiple adjustments in flight simultaneously with the adjustment actually being applied being calculated from old data (both in humans and automated substitutes).

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mirrir 38 minutes ago | parent | prev | next [-]

I'm not an ornithologist but birds don't need to consume jet fuel to fly hundreds of miles either.

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rafram 35 minutes ago | parent [-]

But of course it helps.

	▲	malshe 23 minutes ago \| parent \| next [-]
		In bird culture, this is considered a dick move
	▲	kibwen 33 minutes ago \| parent \| prev [-]
		True, after ingesting a stomach's worth of jet fuel the bird is powered for the rest of its life.

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bonsai_spool an hour ago | parent | prev | next [-]

> but humans don't need to operate at 20Hz to drive a ca

This is not a helpful statement unless you can claim what speed human sensors do work at. And it's going to be faster than the latency of $(sensor + server round trip) Hertz, not getting into LLM processing time.

	▲	Groxx an hour ago \| parent [-]
		It's also not subject to signal loss issues like anyone who uses a phone is quite familiar with. Unless you have narcolepsy.

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cozzyd an hour ago | parent | prev | next [-]

Let's see how well you play counterstrike with a 100 ms ping...

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replygirl an hour ago | parent | prev [-]

reaction latency doesn't cover everything. the round trip from trigger to action is a few hundred ms at best, yes, but to enable that we are processing inputs at ~30hz minimum and integrating at ~5hz. you would total your car pretty quickly if you couldn't constantly adjust