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Résumé : We study the encoding complexity for quantum error correcting codes with large rate and distance. We prove that random Clifford circuits with $O(n \log^2 n)$ gates can be used to encode $k$ qubits in $n$ qubits with a distance $d$ provided $\frac{k}{n} < 1 - \frac{d}{n} \log_2 3 - h(\frac{d}{n})$. In addition, we prove that such circuits typically have a depth of $O( \log^3 n)$.