On Feb 9, 2007, at 11:16 AM, Conrad Sigona wrote:
I have a question about Section 10.4.6 of X.691
From the spec:
10.4.6 A minimum octed 2's-complement-binary-integer encoding of
the whole number has a field-width that is a multiple of eight
bits and also satisfies the condition that the leading nine bits
of the field shall not all be zero and shall not all be ones.
Does 'leading nine bits' suggest that the minimum number of octets
is 2?
No. Perhaps it would have been better written "leading nine bits,
if any".
How would, for example, -1 or 0 be encoded if all of the bits can
not be 1 and can not all be 0?
-1 would be FF and 0 would be 00. What the spec if trying to
disallow is FFFF and 0000, or FFFFFF and 000000, etc.
Thanks, that clears things up for me.
-Adam
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