Description: Gray Code is a series set, each binary number to represent, assuming the number of n bits to represent each well, and any number between two values is only a bit different, such as the following 3-bit Gray Code: 000 001 011 010 110 111 101 100 from the definition that, Gray Code sequence is not unique, for example, to write the above series, in turn, is a Gray Code: 100 101 111 110 010 011 001 000 Gray Code by Frank Gray of Bell Labs made in the 1940s, to the use of PCM (Pusle Code Modulation) method to send signals to avoid mistakes, and in March 17, 1953 to obtain U.S. patents.
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