Abstract: An electronic package is provided, in which electronic elements and at least one packaging module including a semiconductor chip and a shielding structure covering the semiconductor chip are disposed on a carrier structure, an encapsulation layer encapsulates the electronic elements and the packaging module, and a shielding layer is formed on the encapsulation layer and in contact with the shielding structure. Therefore, the packaging module includes the semiconductor chip and the shielding structure and has a chip function and a shielding wall function simultaneously.

Abstract: A backup method of a streaming system includes the following steps. First, a first streaming device is configured as a master streaming device and a second streaming device is configured as an auxiliary streaming device. Second, a first communication mechanism is established between a first signal output device and the master streaming device that the data is transmitted according to the first communication mechanism. Third, a second communication mechanism is established between the first streaming device and the second streaming device that the data is transmitted according to the second communication mechanism. Fourth, a signal source heartbeat packet is transmitted from the first signal output device to the master streaming device. Fifth, an audio-visual source is transmitted from the first signal output device to the master streaming device. Sixth, the master streaming device judges whether the signal source heartbeat packet is received.