| 摘要 |
PURPOSE:To preserve the BSI processing of a basic BSI processing PCM signal in a BSI processing multiplex PCM signal by applying BSI processing to form a basic PCM signal at each prescribed block of each incoming channel PCM signal at a basic PCM speed and multiplexing in the unit of BSI block. CONSTITUTION:The input PCM signal (i) is subject to bit serial BSI PCM signal while the BSI processing (e.g., the 8th bit is inverted and added) is applied at each block (e.g., 8-bit) in basic BSI (Bit Sequence Independence) processing circuits 201-20N. The BSI processing PCM signal is generated in the basic BSI processing circuit 201 at each input PCM signal (each channel). The BSI processing PCM signal corresponding to each channel is multiplexed in a multiplexing circuit 24 in the unit of BSI processing block, that is, in the unit of 9-bits and the result is outputted to a transmission circuit 26 as the multiplex PCM signal. Thus, the BSI processing applied at the speed of the basic PCM signal takes over as it is even in the BSI processing multiplex PCM signal.
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