Translation lookaside bufferLe translation lookaside buffer, ou TLB, est une mémoire cache du processeur utilisée par l'unité de gestion mémoire (MMU) dans le but d'accélérer la traduction des adresses virtuelles en adresses physiques. Sans TLB, le processeur doit consulter la table des pages à chaque fois qu'une adresse virtuelle est utilisée. Lorsque la table des pages est stockée en mémoire, avec plusieurs niveaux d'indirection, cela ralentit considérablement les accès mémoire.
Video codecA video codec is software or hardware that compresses and decompresses digital video. In the context of video compression, codec is a portmanteau of encoder and decoder, while a device that only compresses is typically called an encoder, and one that only decompresses is a decoder. The compressed data format usually conforms to a standard video coding format. The compression is typically lossy, meaning that the compressed video lacks some information present in the original video.
Computational complexityIn computer science, the computational complexity or simply complexity of an algorithm is the amount of resources required to run it. Particular focus is given to computation time (generally measured by the number of needed elementary operations) and memory storage requirements. The complexity of a problem is the complexity of the best algorithms that allow solving the problem. The study of the complexity of explicitly given algorithms is called analysis of algorithms, while the study of the complexity of problems is called computational complexity theory.
