| 摘要 |
A plurality of processing portions sequentially performs a plurality of processing operation on an information signal. In this case, the plurality of processing portions is provided with a control-command-added information signal to which control commands are added for controlling the processing piece to be performed by some or all of the plurality of processing portions, for each predetermined unit of the information signal. The processing portions respectively separate the control command and the information signal from the control-command-added information signal. The information signal thus separated is then processed on the basis of the separated control command for controlling the processing to be performed by this processing portion. The separated control command is added to the post-processing information signal for each predetermined unit thereof, thereby determining a control-command-added information signal to be output.
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