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US 8,805,160 B2Granted
Communication apparatus, control method, and computer-readable recording medium
AssigneeCanon Kabushiki Kaisha
InventorsTatsuya Kimoto, Hidetaka Koizumi, Koji Ogaki
Life of this patent
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Abstract
A communication apparatus includes a communication unit that communicates with an external apparatus via communication lines conforming to HDMI standard, a first detection unit that determines whether a first signal is detected indicating that the communication unit and the external apparatus are connected, a second detection unit that determines whether a second signal is detected indicating that the external apparatus is in a state where the external apparatus displays video data transmitted from the communication unit, and a control unit that controls the communication unit to transmit the video data to the external apparatus if the first signal and the second signal are detected.
Claims36
A transmission device comprising:
- a first detection unit that detects a signal which is outputted from a display device to the transmission device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- an acquiring unit that acquires the information from the display device after the acquisition of the information is allowed;
- a transmission unit that transmits image data, generated using the information acquired from the display device, to the display device via a transmission line;
- a second detection unit that detects whether the transmission line and a terminal resistor of the display device are connected;
- and
- a control unit that controls, based on a status of the signal detected by the first detection unit and a detection result of the second detection unit, whether the transmission unit transmits image data, generated using the information, to the display device via the transmission line, wherein the control unit causes the transmission unit not to transmit image data, generated using the information, to the display device via the transmission line if the acquisition of the information is allowed and the transmission line is not connected to the terminal resistor of the display device.
3 more elements
A method comprising:
- detecting a signal which is outputted from a display device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- acquiring the information from the display device after the acquisition of the information is allowed;
- detecting whether a transmission line and a terminal resistor of the display device are connected, wherein the transmission line is used for transmitting image data, generated using the information acquired from the display device, to the display device;
- controlling, based on a status of the detected signal and a detection result of whether the transmission line and the terminal resistor of the display device are connected, a transmission of image data generated using the information;
- and
- causing not to transmit image data, generated using the information, to the display device via the transmission line if the acquisition of the information is allowed and the transmission line is not connected to the terminal resistor of the display device.
3 more elements
A transmission device comprising:
- a first detection unit that detects a signal which is outputted from a display device to the transmission device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- an acquiring unit that acquires the information from the display device after the acquisition of the information is allowed;
- a transmission unit that transmits image data, generated using the information acquired from the display device, to the display device;
- a second detection unit that detects whether the display device is in a first state, wherein the first state is a state where the display device is in a power on state and a state where image data to be transmitted from the transmission unit to the display device is selected as image data to be displayed by the display device;
- and
- a control unit that controls, based on a status of the signal detected by the first detection unit and a detection result of the second detection unit, whether the transmission unit transmits image data, generated using the information, to the display device, wherein the control unit causes the transmission unit not to transmit image data, generated using the information, to the display device if the acquisition of the information is allowed and the display device is in a second state, and wherein the second state is different from the first state.
3 more elements
A method comprising:
- detecting a signal which is outputted from a display device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, and wherein the information is used for detecting a capability of the display device;
- acquiring the information from the display device after the acquisition of the information is allowed;
- detecting whether the display device is in a first state, wherein the first state is a state where the display device is in a power on state and a state where image data to be transmitted to the display device is selected as image data to be displayed by the display device;
- controlling, based on a status of the detected signal and a detection result of whether the display device is in the first state, a transmission of image data, generated using the information, to the display device;
- and
- causing not to transmit image data, generated using the information, to the display device if the acquisition of the information is allowed and the display device is in a second state, wherein the second state is different from the first state.
3 more elements
A transmission device comprising:
- a first detection unit that detects a signal which is outputted from a display device to the transmission device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- an acquiring unit that acquires the information from the display device after the acquisition of the information is allowed;
- a transmission unit that transmits image data, generated using the information acquired from the display device, to the display device via a transmission line;
- a second detection unit that detects whether the transmission line and a terminal resistor of the display device are connected;
- and
- a control unit that controls, based on a status of the signal detected by the first detection unit and a detection result of the second detection unit, whether the transmission unit transmits image data, generated using the information, to the display device via the transmission line after a transmission of image data, generated using the information, to the display device via the transmission line is started, wherein the control unit causes the transmission unit not to transmit image data, generated using the information, to the display device via the transmission line if the acquisition of the information is allowed and the transmission line is connected to the terminal resistor of the display device, after the transmission of image data, generated using the information, to the display device via the transmission line is started.
3 more elements
A method comprising:
- detecting a signal which is outputted from a display device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- acquiring the information from the display device after the acquisition of the information is allowed;
- detecting whether a transmission line and a terminal resistor of the display device are connected, wherein the transmission line is used for transmitting image data, generated using the information acquired from the display device, to the display device;
- controlling, based on a status of the detected signal and a detection result of whether the transmission line and the terminal resistor of the display device are connected, a transmission of image data generated using the information, after a transmission of image data, generated using the information, to the display device via the transmission line is started;
- and
- causing not to transmit image data, generated using the information, to the display device via the transmission line if the acquisition of the information is allowed and the transmission line is not connected to the terminal resistor of the display device, after the transmission of image data, generated using the information, to the display device via the transmission line is started.
3 more elements
A transmission device comprising:
- a first detection unit that detects a signal which is outputted from a display device to the transmission device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, wherein the information is used for detecting a capability of the display device;
- an acquiring unit that acquires the information from the display device after the acquisition of the information is allowed;
- a transmission unit that transmits image data, generated using the information acquired from the display device, to the display device;
- a second detection unit that detects whether the display device is in a first state, wherein the first state is a state where the display device is in a power on state and a state where image data to be transmitted from the transmission unit to the display device is selected as image data to be displayed by the display device;
- and
- a control unit that controls, based on a status of the signal detected by the first detection unit and a detection result of the second detection unit, whether the transmission unit transmits image data, generated using the information, to the display device after a transmission of image data, generated using the information, to the display device, wherein the control unit causes the transmission unit not to transmit image data, generated using the information, to the display device if the acquisition of the information is allowed and the display device is in a second state, after the transmission of image data, generated using the information, to the display device, is started, and wherein the second state is different from the first state.
3 more elements
A method comprising:
- detecting a signal which is outputted from a display device, wherein the signal is used for determining whether an acquisition of information relating to the display device is allowed, and wherein the information is used for detecting a capability of the display device;
- acquiring the information from the display device after the acquisition of the information is allowed;
- detecting whether the display device is in a first state, wherein the first state is a state where the display device is in a power on state and a state where image data to be transmitted to the display device is selected as image data to be displayed by the display device;
- controlling, based on a status of the detected signal and a detection result of whether the display device is in the first state, a transmission of image data, generated using the information, to the display device after a transmission of image data, generated using the information, to the display device;
- and
- causing not to transmit image data, generated using the information, to the display device if the acquisition of the information is allowed and the display device is in a second state after the transmission of image data, generated using the information, to the display device, wherein the second state is different from the first state.
3 more elements
Dependencies are inferred from the claim text.