Abstract: A projection device and a projection picture correction method thereof are provided. When the projection device performs projection toward a projection surface, a plurality of target coordinates of a plurality of target vertexes are obtained based on a plurality of planes of the projection surface. The plurality of planes are not coplanar with each other, and the plurality of target vertexes form a target polygon. A first direction scaling process is performed respectively on a plurality of first image portions of an original trapezoidal image and a trapezoidal image block is generated. A second direction scaling process is performed respectively on a plurality of second image portions of the trapezoidal image block and a target image block aligned with the target polygon is generated. An output image including the target image block is projected onto the projection surface.

Abstract: The subject technology performs a transaction locally at a computing node. The subject technology determines that the transaction has been completed. The subject technology determines a set of immutable attributes from the completed transaction. The subject technology generates an aggregate identifier based on the set of immutable attributes. The subject technology publishes the generated aggregate ID. The subject technology stores the published aggregate ID to an external storage location.

Abstract: A projection device and a projection picture correction method thereof are provided. When the projection device performs projection toward a projection surface, a plurality of target coordinates of a plurality of target vertexes are obtained based on a plurality of planes of the projection surface. The plurality of planes are not coplanar with each other, and the plurality of target vertexes form a target polygon. A first direction scaling process is performed respectively on a plurality of first image portions of an original trapezoidal image and a trapezoidal image block is generated. A second direction scaling process is performed respectively on a plurality of second image portions of the trapezoidal image block and a target image block aligned with the target polygon is generated. An output image including the target image block is projected onto the projection surface.

Abstract: A projection device and a keystone correction method thereof are provided. The keystone correction method is adapted for the projection device and includes the following steps. A first image is obtained. A first line-taking position parameter is determined according to a ratio of a first target edge length to a second target edge length. At least one line of input pixels disposed in a first direction is retrieved from the first image according to the first line-taking position parameter. A first scaling process related to the first direction is performed according to at least one line of input pixels of the first image, such that a line of output pixels of a second image disposed in the first direction is generated. The projection device projects the second image onto a projection screen to display a rectangular projected image.

Abstract: An audio signal processing device and an audio signal adjusting method thereof. The audio signal processing device includes a gain determining circuit and an audio signal processing circuit. The gain determining circuit receives an analog audio signal. The gain determining circuit determines a gain based on a difference between a predefined threshold and an amplitude of the analog audio signal in response to detecting that a current sampling amplitude of the analog audio signal is greater than the predefined threshold. The audio signal processing circuit is coupled to the gain determining circuit and receives the analog audio signal and the gain. The audio signal processing circuit attenuates the analog audio signal according to the gain to generate an output audio signal.

Abstract: An audio signal processing device and an audio signal adjusting method thereof. The audio signal processing device includes a gain determining circuit and an audio signal processing circuit. The gain determining circuit receives an analog audio signal. The gain determining circuit determines a gain based on a difference between a predefined threshold and an amplitude of the analog audio signal in response to detecting that a current sampling amplitude of the analog audio signal is greater than the predefined threshold. The audio signal processing circuit is coupled to the gain determining circuit and receives the analog audio signal and the gain. The audio signal processing circuit attenuates the analog audio signal according to the gain to generate an output audio signal.

Abstract: A portable and foldable support bracket for supporting and holding a portable electronic device includes a first support member, a pivot mechanism, a second support member and a support arm. The second support member is rotatably and adjustably assembled with the first support member via the pivot mechanism, and is positioned coplanar with the first support member. The support arm is rotatably and adjustably assembled to the pivot mechanism and foldable upon the first and second support members.

Abstract: A support mechanism for supporting an electronic device is disclosed. The support mechanism, comprises at least one connecting assembly; and at least one pair of support portions, each of the at least one pair of support portions comprising a first support member, a connecting member comprising a first connecting end and a second connecting end, and a second support member; wherein the first support member is rotatably connected to the connecting member at the first connecting end, the second support member is rotatably connected to the second connecting member at the second connecting end, and the second support members of each of the at least one pair of support portions are rotatably connected to each other by the at least one connecting assembly.

Abstract: A support mechanism for supporting an electronic device is disclosed. The support mechanism comprises two support assemblies detachably assembled together, each support assembly comprising an adjustable member defining a latching groove; and a support member rotatably connected to the adjusting member, the support member of one of the two support assemblies being capable of being partially received in the latching groove of the adjustable member of another one of the two support assemblies.

Abstract: A support device includes a base, a support tube, and a support bracket. The support tube includes a plurality of support units coaxially connected together in order, the support tube has a first end fixed to the base, and a second end opposite to the first end. The support bracket is adjustably mounted to the base via the support tube, the support bracket is fixed to the second end of the support tube. Each support unit of the support tube includes a linking base and a linking head opposite to the linking base, the linking base of each support unit is adjustably ball hinged with the linking head of one adjacent support unit.

Abstract: A support mechanism for supporting an electronic device is disclosed. The support mechanism, comprises at least one connecting assembly; and at least one pair of support portions, each of the at least one pair of support portions comprising a first support member, a connecting member comprising a first connecting end and a second connecting end, and a second support member; wherein the first support member is rotatably connected to the connecting member at the first connecting end, the second support member is rotatably connected to the second connecting member at the second connecting end, and the second support members of each of the at least one pair of support portions are rotatably connected to each other by the at least one connecting assembly.

Abstract: A support mechanism for supporting an electronic device is disclosed. The support mechanism comprises two support assemblies detachably assembled together, each support assembly comprising an adjustable member defining a latching groove; and a support member rotatably connected to the adjusting member, the support member of one of the two support assemblies being capable of being partially received in the latching groove of the adjustable member of another one of the two support assemblies.

Abstract: A portable and foldable support bracket for supporting and holding a portable electronic device includes a first support member, a pivot mechanism, a second support member and a support arm. The second support member is rotatably and adjustably assembled with the first support member via the pivot mechanism, and is positioned coplanar with the first support member. The support arm is rotatably and adjustably assembled to the pivot mechanism and foldable upon the first and second support members.