摘要:
An electronic device and method of dynamically correcting audio output of audio devices creates a coordinate system in relation to cameras and audio devices, and obtains coordinates of each camera and each audio device. The cameras detects a user. A distance between the user and each audio devices is computed. One audio device is considered as a first audio device. A ratio of audio intensities and a difference of audio transmitting time between the first audio device and each of the other audio devices are computed. Delaying the audio output starting time of each of the other audio devices according to the differences and adjust the audio intensity of each of the other audio devices according to the ratios.
摘要:
A method for performing security surveillance using a control computer sends an image obtaining request from the control computer to a preset channel of a network video recorder (NVR) or a digital video recorder (DVR), and receives captured images from the preset channel of the NVR or the DVR. The method further detects a specified object in the captured images, and stores/outputs an image area of the specified object in a storage device of the control computer or a terminal device.
摘要:
A video recorder includes a sound occurrence detection system to detect a sound occurrence in an area. A detection method can detect the sound occurrence by using the video recorder. The detection method establishes relationships between rotation angles of the video recorder and sound output orientations of a sound source in the area. Furthermore, the detection method determines a rotation angle according to the relationships once the sound occurrence occurs, and rotates the video recorder according to the rotation angle, to record videos and sounds of a sound source that causes the sound occurrence.