Microsoft Research, Cloud Gaming

Microsoft Research invented video game time travel to fix cloud gaming | ExtremeTech: "... DeLorean does four things to improve responsiveness and lower RTT — future input prediction, state space subsampling, misprediction compensation, and bandwidth compression. Combined, these techniques can eliminate up to 250ms of lag, which can keep a cloud-based game playable even on mobile connections. Both Doom 3 and Fable 3 were modified successfully to compensate for network lag using DeLorean. So let’s say you’re playing a first-person shooter on your tablet via a cloud gaming platform running DeLorean. Before you’ve even done anything, the DeLorean-equipped server has spawned three “slave” instances of the game (this can be increased depending on network latency). These copies are used to render possible frames depicting what you might do. One frame might be looking slightly to the left, another to the right, and the third could show the beginning of a muzzle flash as you open fire. These are all fed into the master game, which then immediately sends the correct one when your input reaches the server...." (read more at the link above)


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