# US 7,609,288 B2 · Method and apparatus of transferring the desktop of PC to video communication terminal > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,288 B2 - Document ID: US7609288B2 - Status: Granted - Kind: B2 - Application number: 11/049,217 - Filed: 2005-02-02 - Published: 2005-07-14 - Granted: 2009-10-27 - Earliest claimed: 2002-08-07 - Assignees: Huawei Technologies Co., Ltd. - Inventors: Ge Guo; Wuzhou Zhan; Fang Xu; Hui Qin - Web page: https://patentgrep.com/patent/US7609288B2 ## CPC - H04N 7/147: {Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals (selecting H04Q)} - G06F 3/1454: {involving copying of the display data of a local workstation or window to a remote workstation or window so that an actual copy of the data is displayed simultaneously on two or more displays, e.g. teledisplay} - H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract The invention discloses a method for transferring desktop information of a PC to a video communication terminal. The method includes steps as follow: capturing desktop information of a PC after having received a triggering command, and converting a format of the PC desktop information into a format of the a video communication terminal; encoding the converted desktop format in a mode ensured by the local video communication terminal; sending the coded bit stream to the local video communication terminal; receiving the said coded bit stream by the local video communication terminal, and transferring to a remote video communication terminal after being processed. The invention also discloses an apparatus for transferring desktop information of a PC to a video communication terminal that includes a background processing-device and a terminal processing-device. The background processing-device includes a capture driver, a capturing device, an image converter, a background encoder and a background bit stream sender; the terminal processing-device includes a terminal bit stream transmitter. With the method and device, any desktop information of a PC can be transferred to a remote video communication terminal integrally and clearly. ## Claims ### Claim 1 A method for transferring desktop information of a PC to a video communication terminal, comprising, a) capturing desktop information of the PC after receiving a triggering command, and converting a PC format of the desktop information into a format of a local video communication terminal; b) encoding the converted desktop format in a mode ensured by the local video communication terminal; c) sending the coded bit stream to the local video communication terminal; d) receiving the coded bit stream by the local video communication terminal and transferring to a remote video communication terminal through transmission channel after processing. ### Claim 2 (depends on 1) The method according to claim 1, wherein Step a further comprises: pre-processing the desktop information captured. ### Claim 3 (depends on 2) The method according to claim 2, the step of pre-processing comprises: removing unnecessary desktop information, and then filtering and editing the rest of the desktop information. ### Claim 4 (depends on 1) The method according to claim 1, wherein Step a further comprises: after capturing the desktop information, detecting whether the desktop information captured has been changed; if it is, going to next step, otherwise waiting for the triggering command. ### Claim 5 (depends on 1) The method according to claim 1, the desktop information in Step a is captured from a video memory of the PC. ### Claim 6 (depends on 1) The method according to claim 1, wherein Step d further comprises: decoding the received coded bit stream and then outputting to a local output device. ### Claim 7 (depends on 1) The method according to claim 1, said Step d further comprises: simultaneously transferring the coded bit stream of the desktop information and that of a local image in a multiplex encoding mode. ### Claim 8 (depends on 1) The method according to claim 1, wherein the processing of Step d comprises: detecting whether the local encoding mode of the coded bit stream is same as that of the remote video communication terminal; if it is, transferring the coded bit stream directly, otherwise decoding the coded bit stream first, and then encoding again in a mode of the remote video communication terminal. ### Claim 9 An apparatus for transferring desktop information of a PC to a video communication terminal, comprises, a background processing-device, capturing desktop information of the PC, converting the captured desktop information from a PC format to a format of a local video communication terminal, encoding the converted format to a coded bit stream and outputting; a terminal processing-device, transferring the coded bit stream from the background processing-device to a remote video communication terminal. ### Claim 10 (depends on 9) The apparatus according to claim 9, wherein the background processing-device comprises: a capture driver, sending out a triggering command; a capturing device, receiving the triggering command from the capture driver and capturing the desktop information, then outputting; an image converter, receiving the captured desktop information from the capturing device and converting into the format of the local video communication terminal, then outputting; a background encoder, encoding output signal from said image converter into the coded bit stream; a background bit stream sender, sending the coded bit stream to the terminal processing-device. ### Claim 11 (depends on 10) The apparatus according to claim 10, wherein the background processing-device further comprises an image pre-processor that accepts output of the capturing device, removes unnecessary desktop information and then filters and edits the rest of the desktop information. ### Claim 12 (depends on 9) The apparatus according to claim 9, wherein the terminal processing-device comprises a terminal bit stream transmitter that transfers the coded bit stream to the remote video communication terminal. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the terminal processing-device further comprises a terminal decoder that decodes the output bit stream from the background processing-device and outputs to a local output device. ### Claim 14 (depends on 12) The apparatus according to claims 12, wherein the terminal processing-device further comprises a terminal encoder that encodes a local image and then outputs to the terminal bit stream transmitter. ### Claim 15 (depends on 13) The apparatus according to claim 13, wherein the terminal decoder decodes the background processing-device output of which encoding format is different from that of the remote video communication terminal, and then outputs to the terminal encoder -which encodes the decoded bit stream again with an encoding format of the remote video communication terminal, and then outputs to the terminal bit stream transmitter. ### Claim 16 (depends on 10) The apparatus according to claim 10, further comprising: a message channel device that sends an encoding message of the video communication terminal to the background encoder, sends a transmission speed rate of the local video communication terminal to the background bit stream sender, and sends a control message from the background bit stream sender to the terminal processing-device. ### Claim 17 (depends on 13) The apparatus according to claims 13, wherein the terminal processing-device further comprises a terminal encoder that encodes a local image and then outputs to the terminal bit stream transmitter.