Abstract: An object of the present invention is to provide an adaptor device for a source device that can reduce a connection time to a switching destination in the case where a connection destination is switched. For this, an adaptor device for a source device (104) includes a storage unit (206) that stores format information that is information indicating the format of the video signal; a dummy signal generating unit (204) that generates a dummy signal that is a dummy video signal having the same format as that specified by the format information obtained from the storage unit (206); a control unit (203) that causes the dummy signal generating unit (204) to generate the dummy signal when the video signal is not obtained from the source device; and a wireless transmitting and receiving unit (202) that selectively wirelessly transmits the video signal and the generated dummy signal.

Abstract: In a wireless communication adapter device, in order to reduce connection time to a destination when another sink device is selected as the destination, a control unit included in the wireless communications adaptor device determines whether a device ID of an adapter device for a sink device and EDID information corresponding to the device ID are registered in an EDID managing table. The device ID and the EDID information are obtained through authentication processing with the adapter device for the sink device. When the device ID is registered, the control unit copies the EDID information corresponding to the device ID to the EDID table. When the device ID is not registered, the control unit obtains the EDID information from the authenticated adapter device for the sink device, associates the EDID information with the device ID, and stores the EDID information and the device ID in the EDID managing table.

Abstract: A wireless communication apparatus (1000) includes a wired interface (1100) wire-connected to one or more apparatuses in accordance with the High-Definition Multimedia Interface (HDMI) Standard, a wireless interface (1200) wireless-connected to the other wireless communication apparatus, an address management table (1300) containing CEC logical addresses for identifying each of the apparatuses wire-connected to the pair of wireless communication apparatuses, a table update unit (1400) that updates the address management table (1300) upon receipt of a message indicating that the apparatus connected on the side of one of the wired interface (1100) and the wireless interface (1200), and a control unit (1500) that notifies the apparatus present on the side of the other of the wired interface (1100) and the wireless interface (1200) that the table update unit (1400) has updated the address management table (1300).

Abstract: An object of the present invention is to provide an adaptor device for a source device that can reduce a connection time to a switching destination in the case where a connection destination is switched. For this, an adaptor device for a source device (104) includes a storage unit (206) that stores format information that is information indicating the format of the video signal; a dummy signal generating unit (204) that generates a dummy signal that is a dummy video signal having the same format as that specified by the format information obtained from the storage unit (206); a control unit (203) that causes the dummy signal generating unit (204) to generate the dummy signal when the video signal is not obtained from the source device; and a wireless transmitting and receiving unit (202) that selectively wirelessly transmits the video signal and the generated dummy signal.

Abstract: The present invention has an object to provide a wireless communications adaptor device which can reduce the connection time to the destination when another sink device is selected as the destination. A control unit (203) included in the wireless communications adaptor device determines whether or not a device ID of an adapter device for a sink device (105 or 106) and EDID information corresponding to the device ID are registered in an EDID managing table (206). The device ID and the EDID information are obtained through authentication processing with the adapter device for the sink device (105 or 106). When the device ID is registered, the control unit (203) copies the EDID information corresponding to the device ID to the EDID table (205).

Abstract: Provided is a wireless video and audio transmission system which is more convenient for a user even when a destination to which video and audio data is transmitted is switched, from a video and audio output device such as a TV, to a video output device such as a liquid-crystal projector. In the wireless video and audio transmission system (10), one of a video output device (300), a wireless transmission device (100) and an audio output device (400) determines an audio mode of the audio output device (400) by judging whether or not either a video and audio output device (200) or the video output device (300) which is selected to receive a radio signal transmitted from the wireless transmission device (100) and to output video is capable of outputting audio.

Abstract: A diffraction grating has a reflection film formed on a photosensitive layer disposed on a substrate through exposure followed by development and the groove profile thus formed has a configuration distorted from a sinusoidal form because the sensitivity curve of the photosensitive layer is of the second order non-linearity to the exposure amount. With the groove pitch expressed by d, K=2 .pi./d, the coordinate perpendicular to the groove direction taken as x, and the groove profile .eta.(x) expressed as .eta.(x)=h [sin (Kx)+.gamma.sin (2Kz-90.degree.)], the parameters h, .gamma. and .phi. satisfy as follows:0.26.ltoreq.2h/d.ltoreq.0.520.05.ltoreq..gamma..ltoreq.0.32.The wavelength region to be used is normalized by the groove pitch d as 0.67.ltoreq..lambda./d.ltoreq.1.15. When an incident angle is expressed by .theta. and the first order Littrow angle is expressed by .theta..sub.L, the mount to be used is carried out in such a region that satisfies the following expression:.theta..sub.L -5.degree..ltoreq..