| 摘要 |
<p>PURPOSE:To provide the packet identifying circuit which can identify packets at high speed with simple configuration in a facsimile broadcasting receiver. CONSTITUTION:A comparator 4 compares an inputted mode control part with a bit pattern in the case of free broadcasting, and a comparator 5 compares the inputted mode control part with a bit pattern in the case of pay broadcasting. Adders 6 and 7 add the outputs of the comparators 4 and 5 and respectively output the numbers of non-coincident bits. Discriminators 8 and 9 compare the number of non-coincident bits with '3' as the number of error correcting and correctable bits and output discriminated values. When the discriminated value outputted from the discriminator 8 is '1', it is free broadcasting and when the discriminated value outputted from the discriminator 9 is '1', it is pay broadcasting.</p> |
