The term proportional sampling is identified in base64 scheme by the sequence cHJvcG9ydGlvbmFsIHNhbXBsaW5n, while the MD5 signature is equal to f7534eb32451f5bb6174823d635f3951. The ASCII encoding of proportional sampling in hexadecimal notation is 70726f706f7274696f6e616c2073616d706c696e67.