DATA-UPDATE APPARATUS, REPRODUCTION APPARATUS, DATA-ADDITION APPARATUS, DATA-DETECTION APPARATUS AND DATA-REMOVAL APPARATUS

摘要

The present invention provides a data-update apparatus (1003) comprising: a channel-selection means (1004) that selects and outputs part of the channels of the input signal; a detection means (1006) that detects the data that is embedded in the signal of the channel; a judgment means (1007) that determines whether or not to update the data; an update-signal-generation means (1008),to which an update instruction is input and to which the signal of the channel is input, and that outputs an update signal for updating the detected data; and a channel-selection-addition means (1009)that selects part of the channels of the input signal and adds the update signal to the selected channels.