Which encoding uses the \x (backslash x) prefix?

Question

I\'m attempting to decode text which is prefixing certain \'special characters\' with \\x. I\'ve worked out the following mappings by hand:

Answer 1

It's ASCII. All occurrences of the four characters \xST are converted to 1 character, whose ASCII code is ST (in hexadecimal), where S and T are any of 0123456789abcdefABCDEF.