Input and output switching device and input and output switching method
First Claim
Patent Images
1. An input and output switching device comprising:
- a first interface which is connected to an external transmitting and receiving device, and at least transmits video data to, and receives audio data and a control signal from, the connected external transmitting and receiving device;
a second interface which is connected to an external transmitting device, and at least receives video and audio data from the external transmitting device;
a third interface which is connected to an external audio output device, and transmits audio data;
an audio selector which switches a path through which the audio data is to be transmitted to the external audio output device;
a controller that instructs said audio selector to switch the path, based on the control signal received by said first interface; and
an audio data extractor that extracts audio data from the video and audio data received by said second interface,wherein, when a first instruction signal for selecting said first interface is received as the control signal;
(a-i) said first interface receives the audio data from the external transmitting and receiving device, and outputs the received audio data to said audio selector;
(a-ii) said controller issues, to said audio selector, a first input selection instruction for selecting said first interface as an input of said audio selector;
(a-iii) said audio selector outputs, to said third interface, the audio data outputted from said first interface, when the first input selection instruction is received from said controller; and
(a-iv) said third interface outputs, to the external audio output device, the audio data outputted by said audio selector, andwhen a second instruction signal for selecting said second interface is received as the control signal;
(b-i) said second interface receives the video and audio data from the external transmitting device, and outputs the received video and audio data to said audio data extractor;
(b-ii) said audio data extractor extracts the audio data from the video and audio data received from said second interface, and outputs the extracted audio data to said audio selector;
(b-iii) said controller issues, to said audio selector, a second input selection instruction for selecting said second interface as the input of said audio selector;
(b-iv) said audio selector outputs, to said third interface, the extracted audio data outputted from said audio data extractor, when the second input selection instruction is received from said controller;
(b-v) said third interface outputs, to the external audio output device, the audio data outputted from said audio selector; and
(b-vi) said first interface outputs, to the external transmitting and receiving device, the video and audio data received from the external transmitting device,said first interface receives the audio data from the external transmitting and receiving device only when the video data is not to be transmitted from said first interface to the external transmitting and receiving device, and does not receive the audio data when the video data is to be transmitted from said first interface to the external transmitting and receiving device, andsaid audio selector causes the external audio output device to output the audio data received from the external transmitting and receiving device only when the video data is not to be transmitted from said first interface to the external transmitting and receiving device, and causes the external audio output device to output the audio data extracted by said audio data extractor when the video data is to be transmitted from said first interface to the external transmitting and receiving device.
1 Assignment
0 Petitions
Accused Products
Abstract
In the wireless HDMI converter, appropriate audio data input switching is performed, and, when an instruction is received, an audio data extraction unit extracts audio data from video and audio data received by an HDMI input interface from an STB, and an optical audio output interface outputs the extracted audio data to a home theater, thereby avoiding failure of wireless communication by a wireless interface or deterioration of the quality of such wireless communication.
30 Citations
11 Claims
-
1. An input and output switching device comprising:
-
a first interface which is connected to an external transmitting and receiving device, and at least transmits video data to, and receives audio data and a control signal from, the connected external transmitting and receiving device; a second interface which is connected to an external transmitting device, and at least receives video and audio data from the external transmitting device; a third interface which is connected to an external audio output device, and transmits audio data; an audio selector which switches a path through which the audio data is to be transmitted to the external audio output device; a controller that instructs said audio selector to switch the path, based on the control signal received by said first interface; and an audio data extractor that extracts audio data from the video and audio data received by said second interface, wherein, when a first instruction signal for selecting said first interface is received as the control signal; (a-i) said first interface receives the audio data from the external transmitting and receiving device, and outputs the received audio data to said audio selector; (a-ii) said controller issues, to said audio selector, a first input selection instruction for selecting said first interface as an input of said audio selector; (a-iii) said audio selector outputs, to said third interface, the audio data outputted from said first interface, when the first input selection instruction is received from said controller; and (a-iv) said third interface outputs, to the external audio output device, the audio data outputted by said audio selector, and when a second instruction signal for selecting said second interface is received as the control signal; (b-i) said second interface receives the video and audio data from the external transmitting device, and outputs the received video and audio data to said audio data extractor; (b-ii) said audio data extractor extracts the audio data from the video and audio data received from said second interface, and outputs the extracted audio data to said audio selector; (b-iii) said controller issues, to said audio selector, a second input selection instruction for selecting said second interface as the input of said audio selector; (b-iv) said audio selector outputs, to said third interface, the extracted audio data outputted from said audio data extractor, when the second input selection instruction is received from said controller; (b-v) said third interface outputs, to the external audio output device, the audio data outputted from said audio selector; and (b-vi) said first interface outputs, to the external transmitting and receiving device, the video and audio data received from the external transmitting device, said first interface receives the audio data from the external transmitting and receiving device only when the video data is not to be transmitted from said first interface to the external transmitting and receiving device, and does not receive the audio data when the video data is to be transmitted from said first interface to the external transmitting and receiving device, and said audio selector causes the external audio output device to output the audio data received from the external transmitting and receiving device only when the video data is not to be transmitted from said first interface to the external transmitting and receiving device, and causes the external audio output device to output the audio data extracted by said audio data extractor when the video data is to be transmitted from said first interface to the external transmitting and receiving device. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. An input and output switching device comprising:
-
a first interface which is wirelessly connected to an external transmitting and receiving device, and at least transmits video data to, and receives audio data and a control signal from, the connected external transmitting and receiving device; a second interface which is connected to an external transmitting device, and at least receives video and audio data from the external transmitting device; a third interface which is connected to an external audio output device, and transmits audio data; an audio selector which switches a path through which the audio data is to be transmitted to the external audio output device; a controller that instructs said audio selector to switch the path, based on the control signal received by said first interface; and an audio data extractor that extracts audio data from the video and audio data received by said second interface, wherein, when a first instruction signal for selecting said first interface is received as the control signal; (a-i) said first interface receives the audio data from the external transmitting and receiving device, and outputs the received audio data to said audio selector; (a-ii) said controller issues, to said audio selector, a first input selection instruction for selecting said first interface as an input of said audio selector; (a-iii) said audio selector outputs, to said third interface, the audio data outputted from said first interface, when the first input selection instruction is received from said controller; and (a-iv) said third interface outputs, to the external audio output device, the audio data outputted by said audio selector, and when a second instruction signal for selecting said second interface is received as the control signal; (b-i) said second interface receives the video and audio data from the external transmitting device, and outputs the received video and audio data to said audio data extractor; (b-ii) said audio data extractor extracts the audio data from the video and audio data received from said second interface, and outputs the extracted audio data to said audio selector; (b-iii) said controller issues, to said audio selector, a second input selection instruction for selecting said second interface as the input of said audio selector; (b-iv) said audio selector outputs, to said third interface, the extracted audio data outputted from said audio data extractor, when the second input selection instruction is received from said controller; (b-v) said third interface outputs, to the external audio output device, the audio data outputted from said audio selector; and (b-vi) said first interface outputs, to the external transmitting and receiving device, the video and audio data received from the external transmitting device, wherein the external transmitting and receiving device is a television which displays high-definition (HD) video, said external audio output device outputs audio included in video and audio which includes the video to be displayed, said input and output switching device is a wireless high-definition multimedia interface (HDMI) converter, said first interface performs wireless communication with the television using wireless HD, and causes the television to display video of the video data from the external transmitting device connected to said wireless HDMI converter using the HDMI, by wirelessly transmitting the video data of the video to the television, said audio data extractor, when the video data is to be wirelessly transmitted, obtains the video and audio data including the video data, and extract extracts the audio data from the obtained video and audio data, said first interface receives the audio data from the television by the wireless communication only when the video data is not to be wirelessly transmitted, and does not receive the audio data when the video data is to be wirelessly transmitted, and said audio selector causes the external audio output device to output the audio data received from the television only when the video data is not to be wirelessly transmitted, and causes the external audio output device to output the audio data extracted by said audio data extractor when the video data is to be wirelessly transmitted. - View Dependent Claims (8, 9, 10)
-
-
11. An input and output switching method performed by an input and output switching device that includes:
-
a first interface which is connected to an external transmitting and receiving device, and at least transmits video data to, and receives audio data and a control signal from, the connected external transmitting and receiving device; a second interface which is connected to an external transmitting device, and at least receives video and audio data from the external transmitting device; a third interface which is connected to an external audio output device, and transmits audio data; an audio selector which switches a path through which the audio data is to be transmitted to the external audio output device; a controller that instructs the audio selector to switch the path, based on the control signal received by the first interface; and an audio data extractor that extracts audio data from the video and audio data received by the second interface, said input and output switching method comprising; (a) the following performed when a first instruction signal for selecting the first interface is received as the control signal; (a-i) receiving the audio data from the external transmitting and receiving device, and outputting the received audio data to the audio selector, performed by the first interface; (a-ii) issuing a first input selection instruction to the audio selector performed by the controller, the first input selection instruction being for selecting the first interface as an input of the audio selector; (a-iii) outputting the audio data outputted from the first interface, to the third interface, performed by the audio selector, when the first input selection instruction is received from the controller; and (a-iv) outputting the audio data outputted by the audio selector, to the external audio output device, performed by the third interface; and (b) the following performed when a second instruction signal for selecting the second interface is received as the control signal; (b-i) receiving the video and audio data from the external transmitting device, and outputting the received video and audio data to the audio data extractor, performed by the second interface; (b-ii) extracting the audio data from the video and audio data received from the second interface, and outputting the extracted audio data to the audio selector, performed by the audio data extractor; (b-iii) issuing a second input selection instruction to the audio selector, performed by the controller, the second input selection instruction being for selecting the second interface as the input of the audio selector; (b-iv) outputting the extracted audio data to the third interface, performed by the audio selector, when the second input selection instruction is received from the controller, the extracted audio data being outputted from the audio data extractor; (b-v) outputting the audio data outputted from the audio selector, to the external audio output device, performed by the third interface; and (b-vi) outputting the video and audio data received from the external transmitting device, to the external transmitting and receiving device, performed by the first interface, wherein the first interface receives the audio data from the external transmitting and receiving device only when the video data is not to be transmitted from the first interface to the external transmitting and receiving device, and does not receive the audio data when the video data is to be transmitted from the first interface to the external transmitting and receiving device, and the audio selector causes the external audio output device to output the audio data received from the external transmitting and receiving device only when the video data is not to be transmitted from the first interface to the external transmitting and receiving device, and causes the external audio output device to output the audio data extracted by the audio data extractor when the video data is to be transmitted from the first interface to the external transmitting and receiving device.
-
Specification