alt Hacker NewsYou can stream video with milliseconds of latency, provided you have enough bandwidth for the video stream. Videoconferencing and cloud gaming both work on this principle.
That said, I would argue that their focus on one-way latency is misinformation meant to make the picture look rosier than it actually is. Round-trip latency is what matters here -- the video feed needs to get to the assistant, then the assistant needs to react, then their response needs to get back to the car. If one-way latency is 250ms, then round-trip latency would presumably be 500ms, which is a very long time in the context of driving. At highway speeds, you'd travel ~44 feet / 13 meters in that time.
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>That said, I would argue that their focus on one-way latency is misinformation meant to make the picture look rosier than it actually is. Round-trip latency is what matters here -- the video feed needs to get to the assistant, then the assistant needs to react, then their response needs to get back to the car. If one-way latency is 250ms, then round-trip latency would presumably be 500ms, which is a very long time in the context of driving. At highway speeds, you'd travel ~44 feet / 13 meters in that time.
Right, which is why the blog post is titled "Advice, not control ..." and goes to explain that they're not relying on the "remote assistance" people to make split second judgements.
They don’t do human in the loop at highway speeds.
Further the cars need to safely stop in an emergency without human intervention. There’s no way for the car to first notice a problem, then send a message to a call center which then routes to a human, and for that human to understand the situation, all fast enough to avoid a collision. Even 50ms is significant here let alone several seconds.