Is this actually 1.58 bits? (Log base 2 of 3) I heard of another "1.58 bit" model that actually used 2 bits instead. "1.6 bit" is easy enough, you can pack f

Is this actually 1.58 bits? (Log base 2 of 3) I heard of another "1.58 bit" model that actually used 2 bits instead. "1.6 bit" is easy enough, you can pack five 3-state values into a byte by using values 0-242. Then unpacking is easy, you divide and modulo by 3 up to five times (or use a lookup table).