Abstract: A method of identifying a flange specification based on an augmented reality interface includes steps of: providing a first interface, through which an operator picks real-time images of a flange at different viewing angles, and creating a virtual flange surface according to the real-time images; providing a second interface, through which the operator picks three circumferential points corresponding to the flange, and creating a virtual flange model having a virtual outer diameter; providing a third interface, through which the operator adjusts a virtual pitch circle diameter of the virtual flange model; providing a fourth interface, through which the operator adjusts a virtual thickness of the virtual flange model; providing a fifth interface, through which the operator inputs a count of bolts; and searching a database according to the virtual outer diameter, the virtual pitch circle diameter and the virtual thickness of the virtual flange model to obtain searched results.

Abstract: A method of identifying a flange specification based on an augmented reality interface includes steps of: providing a first interface, through which an operator picks real-time images of a flange at different viewing angles, and creating a virtual flange surface according to the real-time images; providing a second interface, through which the operator picks three circumferential points corresponding to the flange, and creating a virtual flange model having a virtual outer diameter; providing a third interface, through which the operator adjusts a virtual pitch circle diameter of the virtual flange model; providing a fourth interface, through which the operator adjusts a virtual thickness of the virtual flange model; providing a fifth interface, through which the operator inputs a count of bolts; and searching a database according to the virtual outer diameter, the virtual pitch circle diameter and the virtual thickness of the virtual flange model to obtain searched results.

Abstract: A device for mixed reality includes a base, a curved mirror, a first holder, and a second holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed on the base, disposed in front of the concave surface and within a focal length of the curved mirror, and configured to support a portable apparatus to be oriented at an angle. The second holder is disposed on the base and supports the curved mirror to face the portable apparatus.

Abstract: A mixed reality assembly includes a curved mirror, a display apparatus, a motion detection module, and a display control module. The display apparatus is within a focal length of the curved mirror and has a display surface facing the curved mirror. The motion detection module is configured to detect a motion of a real object. The display control module is configured to control a display image on the display surface in response to the detected motion of the real object.

Abstract: A device for mixed reality includes a curved mirror and a first holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed in front of the concave surface and within a focal length of the curved mirror and configured to support a portable apparatus. The first holder has a curved surface configured to reflect a sound wave from the portable apparatus to the curved mirror.

Abstract: A mixed reality assembly includes a curved mirror, a display apparatus, a motion detection module, and a display control module. The display apparatus is within a focal length of the curved mirror and has a display surface facing the curved mirror. The motion detection module is configured to detect a motion of a real object. The display control module is configured to control a display image on the display surface in response to the detected motion of the real object.

Abstract: A device for mixed reality includes a curved mirror and a first holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed in front of the concave surface and within a focal length of the curved mirror and configured to support a portable apparatus. The first holder has a curved surface configured to reflect a sound wave from the portable apparatus to the curved mirror.

Abstract: A device for mixed reality includes a base, a curved mirror, a first holder, and a second holder. The curved mirror has a concave surface, a convex surface opposite to the concave surface, and a light transmissive medium between the concave surface and the convex surface. The first holder is disposed on the base, disposed in front of the concave surface and within a focal length of the curved mirror, and configured to support a portable apparatus to be oriented at an angle. The second holder is disposed on the base and supports the curved mirror to face the portable apparatus.

Abstract: A split-band compression circuit includes first stage filters, split-band limiters, and second stage filters. The first stage filters are configured to receive and filter an input signal to output first split-band signals. The split-band limiters are coupled to the first stage filters respectively, and configured to perform compression on the first split-band signals to output second split-band signals. The second stage filters are coupled to the split-band limiters respectively, and configured to filter corresponding second split-band signals to output output signals. The first stage filter and the second stage filter corresponding to the same split-band limiter have different cut-off frequencies respectively.

Abstract: A multimedia television is provided. The multimedia television includes a video playback apparatus, an audio processing device, M front loudspeakers, a rear audio playback apparatus, and a mixing device. The video playback apparatus is used for displaying a video signal. The audio processing device processes an audio signal into a multi-channel audio signal consisting of M front sub-audio signals and N rear sub-audio signals. Each front loudspeaker plays back one corresponding front sub-audio signal. And, the mixing device mixes the N rear sub-audio signals into a mixed audio signal, which is then wirelessly transmitted to the rear audio playback apparatus. After the mixed audio signal is processed into N rear sub-audio signals, N rear loudspeakers in the rear audio playback apparatus playback the N rear sub-audio signals.

Abstract: A wireless multi-channel audio system is provided. The audio system includes a multiplexer, a transmitting antenna, a transmitter, and M playback apparatuses. First, the multiplexer receives M channels of audio signals and adds an ith identification to the ith channel of audio signals among the M channels of audio signals. Next, the multiplexer mixes the M channels of audio signals to generate a mixed signal in a time-division multiplexing way. After receiving the mixed signal from the multiplexer, the transmitter transmits the mixed signal through the transmitting antenna. The ith playback apparatus among the M playback apparatuses includes an ith antenna, an ith receiver, and an ith loudspeaker. The ith receiver receives the ith channel of audio signals from the mixed signal according to the ith identification and through the ith antenna. And, the ith loudspeaker plays back the ith channel of audio signal received by the ith receiver.

Abstract: A multimedia television is provided. The multimedia television includes a video playback apparatus, an audio processing device, M front loudspeakers, a rear audio playback apparatus, and a mixing device. The video playback apparatus is used for displaying a video signal. The audio processing device processes an audio signal into a multi-channel audio signal consisting of M front sub-audio signals and N rear sub-audio signals. Each front loudspeaker plays back one corresponding front sub-audio signal. And, the mixing device mixes the N rear sub-audio signals into a mixed audio signal, which is then wirelessly transmitted to the rear audio playback apparatus. After the mixed audio signal is processed into N rear sub-audio signals, N rear loudspeakers in the rear audio playback apparatus playback the N rear sub-audio signals.