Short video - Code de Gray (Code binaire réfléchi)

22 Jan 2024 · 2 min
1:51

In this French-language instructional short, the presenter explains the Gray code (binary reflected code) and how to construct it systematically. Starting with a single-bit code (A), they show the two possible values (0, 1). They then expand to a two-bit code (A, B) by mirroring the existing sequence, placing the reflected values for bit A (1, 0) and adding two 0s followed by two 1s for bit B, resulting in the Gray sequence 00, 01, 11, 10. The key property highlighted is that only one bit changes between successive codes. The presenter adds a third bit (C) using the same reflection method: duplicate the existing four rows, mirror them, and prepend four 0s then four 1s for bit C, yielding an eight‑entry 3‑bit Gray code. Throughout, they emphasize the doubling relationship N = 2ⁿ, where N is the number of possible combinations and n the number of bits, and they repeatedly refer to the “mirror” analogy that gives the code its name.

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