protected short ReadBlock(int klass, int offset)
{
int numbits = NumBits[klass];
if (numbits > 0) {
int klass_offset;
klass_offset = (int)this.Offsets.Read (numbits, new BitStreamCtx(offset));
return OffTable[klass][klass_offset];
} else {
return OffTable[klass][0];
}
}