Abstract: A method for filtering noise of lens operation is applicable to a controller being communicably connected with a video recorder. The method includes: sending, by the controller, a recording instruction configured to control the video recorder to perform a video recording and an audio recording; sending, by the controller, a lens operation instruction configured to control a lens of the video recorder to perform an operation; reading, by the controller, an inverted noise signal associated with the operation receiving, by the controller, an audio recording signal generated by the video recorder when the video recorder performs the operation; and synthesizing, by the controller, the audio recording signal and the inverted noise signal to output a synthesized audio signal.

Abstract: A remote screenshot method adapted to a sender and a receiver having a communicable connection with the sender, wherein the sender electrically connects to an electronic device to receive an image signal outputted by the electronic device, the receiver electrically connects to a display device to show the image signal, and the remote screenshot method comprises: sending a capturing instruction through a first communication circuit by the sender; receiving the capturing instruction through a second communication circuit by the receiver; obtaining a captured image according to the capturing instruction by the sender, wherein the captured image is associated with the image signal shown by the display device; sending the captured image to the first communication circuit through the second communication circuit by the receiver; and storing the captured image in a storage circuit by the sender.

Abstract: A method for filtering noise of lens operation is applicable to a controller being communicably connected with a video recorder. The method includes: sending, by the controller, a recording instruction configured to control the video recorder to perform a video recording and an audio recording; sending, by the controller, a lens operation instruction configured to control a lens of the video recorder to perform an operation; reading, by the controller, an inverted noise signal associated with the operation receiving, by the controller, an audio recording signal generated by the video recorder when the video recorder performs the operation; and synthesizing, by the controller, the audio recording signal and the inverted noise signal to output a synthesized audio signal.

Abstract: A transmission device capable of control feedback comprises a sender and a receiver. The sender electrically connects to an electronic device through USB type-C for receiving an image signal and sending a control signal. A first processing circuit of the sender converts a network packet into the control signal. A first communication circuit of the sender receives the network packet and sends the image signal. The receiver electrically connects to a display device for sending the image signal and receiving the control signal. A second processing circuit of the receiver encapsulates control signal into the network packet. A second communication circuit of the receiver communicably connects to the first communication circuit to send the network packet and receive the image signal.

Abstract: An extension apparatus for a universal serial bus (USB) interface includes a transmitting device, a receiving device and an electrical signal network cable. The transmitting device includes the following elements: a first packet-processing unit to receive a first interface packet and generate an original data accordingly, a first buffering unit to temporarily store the original data, and a first data-converting unit to generate and output a network packet signal based on the original data. The receiving device includes the following elements: a second data-converting unit to receive the network packet signal and generate the original data accordingly, a second buffering unit to temporarily store the original data, and a second packet-processing unit to receive the original data and generate the first interface packet. The electrical signal network cable is electrically coupled between the transmitting device and the receiving device to transmit the network packet signal.

Abstract: A remote screenshot method adapted to a sender and a receiver having a communicable connection with the sender, wherein the sender electrically connects to an electronic device to receive an image signal outputted by the electronic device, the receiver electrically connects to a display device to show the image signal, and the remote screenshot method comprises: sending a capturing instruction through a first communication circuit by the sender; receiving the capturing instruction through a second communication circuit by the receiver; obtaining a captured image according to the capturing instruction by the sender, wherein the captured image is associated with the image signal shown by the display device; sending the captured image to the first communication circuit through the second communication circuit by the receiver; and storing the captured image in a storage circuit by the sender.

Abstract: A transmission device capable of control feedback comprises a sender and a receiver. The sender electrically connects to an electronic device through USB type-C for receiving an image signal and sending a control signal. A first processing circuit of the sender converts a network packet into the control signal. A first communication circuit of the sender receives the network packet and sends the image signal. The receiver electrically connects to a display device for sending the image signal and receiving the control signal. A second processing circuit of the receiver encapsulates control signal into the network packet. A second communication circuit of the receiver communicably connects to the first communication circuit to send the network packet and receive the image signal.

Abstract: An extension apparatus for a universal serial bus (USB) interface includes a transmitting device, a receiving device and an electrical signal network cable. The transmitting device includes the following elements: a first packet-processing unit to receive a first interface packet and generate an original data accordingly, a first buffering unit to temporarily store the original data, and a first data-converting unit to generate and output a network packet signal based on the original data. The receiving device includes the following elements: a second data-converting unit to receive the network packet signal and generate the original data accordingly, a second buffering unit to temporarily store the original data, and a second packet-processing unit to receive the original data and generate the first interface packet. The electrical signal network cable is electrically coupled between the transmitting device and the receiving device to transmit the network packet signal.

Abstract: The present disclosure provides a conversion device, a connection conference system and a connection conference method. This method includes steps as follows. A computer device executes video telephony software. A conference host establishes audio and video communications with a user device through network. The conference connection host receives a first audio signal and a first video signal outputted from the user device. The first audio signal and the first video signal are converted into a first converted audio signal and a first converted video signal supported by the video telephony software, and then the first converted audio signal and the first converted video signal are transmitted to the computer device.

Abstract: A video transmission method is used with a video data providing device, a first video management device and a second video management device. Firstly, a video coding format supportable by the first video management device is retrieved by the video data providing device. Then, a video image is converted into video data by the video data providing device according to the video coding format, and the video data are transmitted to the second video management device. Afterwards, the video data are transmitted from the second video management device to the first video management device, and the video data are decoded by the first video management device according to the video coding format so as to acquire the video image.