Swf Float16 and Half precison

Swf:
16bit float:

• 1 bit for the sign
• 5 bits for the exponent, with an exponent bias of 16???
• 10 bits for the mantissa.

http://en.wikipedia.org/wiki/Half_precision_floating-point_format

IEEE 754 half precision binary floating-point format: binary16

• 1 bit for the sign
• 5 bits for the exponent, with an exponent bias of 15
• 10 bits for the mantissa. (11 bits of precision --> 1.mantissa)