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"What we now call “Gray code” was invented by Frank Gray. It was described in a patent that was awarded in 1953; however, the work was performed much earlier, the patent being applied for in 1947. Gray was a researcher at Bell Telephone Laboratories; during the 1930s and 1940s he was awarded numerous patents for work related to television. 2 According to Heath [Hea72] the code was first, in fact, used by Baudot for telegraphy in the 1870s, though it is only since the advent of computers that the code has become widely known"
"The reflected binary code, also known as Gray Code after Frank Gray, is a binary numeral system where two successive values differ in only one digit.The reflected binary code was originally designed to prevent spurious output from electromechanical switches. Today, Gray codes are widely used to facilitate error correction in digital communications such as digital terrestrial television and some cable TV systems. This is a variable weighted code and is cyclic. This means that it is arranged so that every transition from one value to the next value involves only one bit change. The gray code is sometimes referred to as reflected binary, because the first eight values compare with those of the last 8 values, but in reverse order. The gray code is often used in mechanical applications such as shaft encoders. Source: http://in.docsity.com/en-docs/Fundamentals_of_Information_Technology__Lecture_Notes__Elveera_Miranda"
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