| 摘要 |
PURPOSE:To simplify the entire constitution and also to reduce the scale of a synchronous word multiplexing device which multiplexes the synchronous words to the communications data to be transmitted by simplifyig the constitution of a timing control circuit. CONSTITUTION:A specific pattern 102 which is turned into a synchronous word pattern by the bit stealing is read out from a specific pattern storage part 13, is multiplexed with the communication data 103 which are read out from a communications data storage part 11 and is subjected to the convolution processing by a multiplexing circuit 14. Then a 2nd punctured coding circuit 15 applies the bit stealing to the multiplex data 103 obtained by the circuit 14 together with the data velocity conversion applied by a data velocity converter 16. Thus the output data 107 are obtained. Therefore it is not required to mask the synchronous word inserting part for a bit steal signal 111 and a velocity conversion clock 112. In such a constitution, the constitution of a timing control circuit is simplified. Then the constitution is simplified and the scale is reduced for a synchronous word multiplexing device. |
