38 000 trillion operations persecond the human brain full#

38 000 trillion operations persecond the human brain full#

When we recall past events, we reconstruct the scenes in full detail. Assuming several hundred of kilobytes of raw data per object, such database is not very large. The number of objects experienced by a human during the lifetime is not astronomically large, perhaps, several million objects. Our brain keeps a database of object properties (colors, patterns, smells etc). Our long-term memories are вЂњtracesвЂќ, вЂњcontoursвЂќ and вЂњshapesвЂќ of visualized objects. One idea among others is that we do not keep the information as вЂњvideoвЂќ in a computer, i.e. However, recovered-memory therapy shows that one can unlock, with very high accuracy, very deep memories of childhood. It is also possible that a lot of recorded visual information gets lost during oneвЂ™s lifetime. A human can revive memories with significant details and can recover real-time sequences of memorized events.

In this case, 2.5 petabytes of memory should be sufficient. For example, the full image frame can be converted, say, to 5M pixels recorded with 1 fs (one frame per second). We must assume that we only keep вЂњreducedвЂќ or вЂњslimmedвЂќ information. It is not realistic to expect that our brain can perform such вЂњheavy-liftingвЂќ compression. First, let us say that compression of information by a factor >20,000 is completely out of reach for modern technology (the best we can do in the computer industry is a compression of visual data by a factor 10). It compresses information and converts to some other objects. One may guess that the human brain does not store the вЂњrawвЂќ pixel information. How can we reconcile this huge recording time with the tiny capability of our brain for storage? Therefore, the expected total time of visual recording by a human is 50x365x24=438000 hours. There are reports about humans who can detect information up to 100-1000 fs.ДЄ human lives for 75 years on average, but spends about 25 years asleep. 24 frames per seconds is also quite a conservative number. Thus we stay on the conservative side in our estimate. This totally ignores other recorded information, such as smell and hearing. Now, assuming 2500 TB of total storage, our brain can hold visual information for about 62500 seconds. Assuming that a human can process about 24 frames per second (fs), with 3 bytes per pixel, (typical for a color image), this would give the following recording speed:ДҐ76 000 000 pixels x 24 fs x 3 bytes = 41472000000 bytes = 0.04 TB per second In fact, one can estimate on the вЂњback of envelopeвЂќ of how much information our brain receives during itвЂ™s lifetime. This number was obtained by estimating how much information can be stored by 125 trillion synapses in the cerebral cortex.

According to Scientific American, the memory capacity of the human brain was reported to have the equivalent of 2.5 petabytes (2500 TB) of memory capacity. It combines huge data storage with massive real-time processing.