Abstract: An audio latency calibration method is disclosed. A master speaker and a slave speaker are located at a separation distance from each other, and a paring process is performed. As the paring process is completed, multiple latency time period parameters are obtained relating to the master and slave speakers. The latency time period parameters comprise: T1+T2 representing the time that the master speaker sends an audio signal to the slave speaker, T3+T4 representing the time that the audio signal is transmitted from the slave speaker to a microphone of the master speaker, T5 representing the time that a trumpet of the master speaker plays the audio signal and T3? representing the time that a microphone of the master speaker receives the audio signal. Thus, the way to synchronously play audio signals can be achieved.

Abstract: An electronic device includes a housing mechanism defining an accommodating chamber, a circuit board assembly accommodated in the accommodating chamber, and an anti-disassembly mechanism. The circuit board assembly includes a substrate and a controller connected to the substrate, and the substrate includes a magnetic attraction area. The anti-disassembly mechanism includes a light sensor configured to detect a light intensity in the accommodating chamber, an electromagnetic element opposite to the magnetic attraction area, and an elastic element resisting between the electromagnetic element and the substrate. When the light intensity signal is less than or equal to the light intensity threshold, the controller controls the electromagnetic element to be powered on to generate magnetic attraction to the magnetic attraction area, so that the electromagnetic element is attracted to the magnetic attraction area.

Abstract: A cable protection device is applied to outdoor device, and the outdoor device has a first part, a second part and a cable; the first part and the second part are connected by a first rotating shaft, and the cable is connected between the first part and the second part; the cable protection device has a cable protection structure a first surface of the cable protection structure is fixed to the first part, a second surface of the cable protection structure is fixed to the second part, and the cable is sealed and surrounded by the cable protection structure; when the first part and the second part are unfolded or folded by the first rotating shaft, the cable protection structure expands or closes.

Abstract: A device to detect unauthorized opening of a casing is disposed in the upper or lower casing of an apparatus. The device includes a base plate with vibrator, carrier, and sensor on the lower case, and receiving grooves. Balls of a lesser number than the number of receiving grooves are installed in the grooves in a predetermined arrangement by the manufacturer. A waveguide element and magnet, fixed on the upper casing, is in contact with the balls, and when the waveguide is vibrated, the number and locations of the balls govern the form of a setting signal derived therefrom at the factory. If the upper casing is separated from the lower casing, the waveguide element separates from the carrier, the magnetic element gathers the balls, the predetermined arrangement being thereby lost, when tested by an authorized repair engineer.

Abstract: A rotating controlling method for an antenna, the steps includes collecting parameters for indicating signal strength of the antenna; and determining an optimal radiation position of the antenna and setting the corresponding value of a repulsive force or an attractive force so that the antenna is rotated to the optimal radiation position.

Abstract: In a method for image transmitting executed in a transmitting device, three data transmitting channels are established, the three data transmitting channels are a first channel, a second channel and a third channel. An image of a video is obtained, and the image is divided into a region of interest and a background region. A first data of the region of interest and a second data of the background region are obtained, and the first data is encoded through fountain coding to obtain a third data. The first data, the second data, and the third data are respectively transmitted through the first channel, the second channel, and the third channel to a receiving device. A network condition is received, and whether the network condition matches a preset condition is determined. When the network condition matches the preset condition, the first data is compensated according to a first preset algorithm.

Abstract: A method for showing objects in an augmented reality environment includes the steps of an Augmented Reality (AR) device obtaining spatial information and object identification (ID) from an anchor device. The AR device obtains parameters of the objects from a cloud system. The parameters of an object include the image of the object, the audio of the object, and a first spatial relationship between the object and an anchor device. The AR device obtains a second spatial relationship between the AR device and the anchor device. A third spatial relationship between the object and the AR device can be obtained according to the first spatial relationship and the second spatial relationship. The image of the object and the audio of the object is displayed or projected in the AR device according to the third spatial relationship.