| 摘要 |
PROBLEM TO BE SOLVED: To make a transmission direction bidirectional in a unidirectional transmission interface such as an SPDIF. SOLUTION: A player 10 and an AV amplifier 20 are connected by a cable 30. An amplifier 11 amplifies output signals supplied to an output terminal 14 and outputs them to the cable 30 as transmission signals, and an amplifier 21 amplifies output signals supplied to an output terminal 24 and outputs them to the cable 30 as transmission signals. A computing element 12 subtracts the output signals supplied to the output terminal 14 from the transmission signals output to the cable 30, and a computing element 22 subtracts the output signals supplied to the output terminal 24 from the transmission signals output to the cable 30. Thus, the transmission signals from the AV amplifier 20 are supplied to an input terminal 15, and the transmission signals from the player 10 are supplied to an input terminal 25. The transmission signals include a bidirectional communication bit indicating whether or not bidirectional communication is possible. COPYRIGHT: (C)2010,JPO&INPIT |
