Abstract: A real-time communication system includes a cloud server, multiple user devices having respective real-time communication software for communicating with the cloud server, and multiple dynamic expression rendering devices one-to-one communicating with the user devices respectively. A transmitting user device encodes and transmits a transmitter data, a receiver data and a dynamic expression ID of a selected dynamic expression. The cloud server decodes and transmits the transmitter data, the receiver data and the dynamic expression ID of the selected dynamic expression to a receiver user device. Based on the received dynamic expression ID, the real-time communication software of the receiver user device finds the dynamic expression.

Abstract: A real-time communication system includes a cloud server, multiple user devices having respective real-time communication software for communicating with the cloud server, and multiple dynamic expression rendering devices one-to-one communicating with the user devices respectively. A transmitting user device encodes and transmits a transmitter data, a receiver data and a dynamic expression ID of a selected dynamic expression. The cloud server decodes and transmits the transmitter data, the receiver data and the dynamic expression ID of the selected dynamic expression to a receiver user device. Based on the received dynamic expression ID, the real-time communication software of the receiver user device finds the dynamic expression.

Abstract: A command processing device and method are provided. The command processing device includes a receiving device and a processing device. The receiving device receives an audio signal from an electronic device, wherein the audio data includes data signals and clock signals, and the data signals correspond to a first sound channel and the clock signals correspond to a second sound channel. The processing device is coupled to the receiving device. The processing device obtains the data signals from the first sound channel, and obtains the clock signals from the second sound channel. The processing device obtains one or more commands according to the data signals and clock signals, and performs operations corresponding to the commands.