Abstract: A video stream transmission method is provided. The method has the following steps of: utilizing a video encoding apparatus to encode a plurality of first images to generate a video bitstream and transmit the video bitstream to the video decoding apparatus over a network; utilizing a video decoding apparatus to decode the video bitstream to generate a plurality of second images correspondingly; and when the video decoding apparatus detects that there is data loss of the video bitstream during transmission, utilizing the video decoding apparatus to reference a third image, which is the most recent completely decoded image of the plurality of second images, to perform subsequent video decoding processes and transmit a request signal to the video encoding apparatus, so that the video encoding apparatus references a fourth image, which corresponds to the third image, of the plurality of first images, to perform subsequent video encoding processes.

Abstract: A communication system and method are provided. In the communication system, a first electrical device has an end point which is configured to connect to a plurality of 3G dongles, wherein the 3G dongles have different IP addresses; a cloud server integrates the IP addresses to generate an integrated IP address when the cloud server detects that the first electrical device is connected to the 3G dongles; and a second electrical device transmits data packets with the first electrical device via the integrated IP address through the cloud server.

Abstract: An embodiment provides a video conference system including an audio processing unit, a video processing unit and a network processing unit. The audio processing unit encodes an audio signal to an audio stream. The video processing unit encodes a pause image to a first video stream when the video conference system is in a pause mode, and encodes a video signal to a second video stream when the video conference system is in a conference mode. The network processing unit encodes the first video stream to a first network package in the pause mode, and encodes the second video stream and the audio stream to a second network package in the conference mode.