Display system and display apparatus
If a device non-compatible with CEC is contained in an input path when a display apparatus is HDMI-connected hierarchically to a plurality of external devices, an external device which has transmitted <Active Source> is selected as an operation object device. A TV ( 100 ) is HDMI-connected hierarchically to external devices (an AV amplifier ( 20 a ), recorders ( 10 a, 10 c ), a DVD player ( 10 b )) in a tree shape. The TV ( 100 ) receives <Active Source> indicating an active state capable of video output from the DVD player ( 10 b ) and transmits <Set Stream Path> for switching the input path to the DVD player ( 10 b ). When a device non-compatible with CEC (AV amplifier ( 20 a )) is contained in the input path which transmits <Set Stream Path>, the TV ( 100 ) selects the DVD player ( 10 b ) specified <Active Source> as an operation object device.
1. A display system wherein a display apparatus and a plurality of external devices are HDMI-connected hierarchically in a tree shape, wherein
the display apparatus is provided with a CEC interface which receives a first CEC message indicative of being in an active state capable of outputting video, from any of external device out of the plurality of external devices, and which transmits a second CEC message to switch an input path to the external device, and
operation object device selection portion for selecting, when a device non-compatible with CEC is contained in the input path for transmitting the second CEC message, an external device that corresponds to a physical address specified by the first CEC message as an operation object device.
2. The display system as defined in claim 1 , wherein
the operation object device selection portion compares a first physical address contained in the first CEC message received from the external device, with a second physical address contained in the second CEC message transmitted from the display apparatus, and when an input path shown by the second physical address is contained in an input path shown by the first physical address, an external device that corresponds to a physical address specified by the first CEC message is selected as an operation object device.
3. The display system as defined in claim 1 , wherein
the operation object device selection portion selects, an external device specified by the second CEC message as an operation object device when a device non-compatible with CEC is not contained in the input path for transmitting the second CEC message.
4. The display system as defined in any one of claims 1 through 3 , wherein the first CEC message is <Active Source> defined in HDMI standard, and the second CEC message is <Set Stream Path> defined in the HDMI standard.
5. A display apparatus that constitutes the display system defined in any one of claims 1 through 3 .