Screen projection method and display device

Abstract

The application discloses a screen projection method and a display device. When the display device and a terminal have performed screen projection in the past, part of steps in an RTSP protocol interaction stage is omitted to accelerate the screen projection efficiency. The method comprises the following steps: receiving a screen projection link instruction sent by a terminal, judging whether a first historical record of screen projection with the terminal exists; if the first historical record exists, establishing a TCP protocol to enable the terminal to judge whether a second historical record of screen projection with the display device exists; if the second historical record exists, sending a first preset step to the display device, the first preset step being a starting step after part of steps in the RTSP protocol interaction stage are omitted and determined and executed by the terminal; judging whether to agree to directly execute the first preset step; if the first preset step is directly executed, a first agreement message is fed back, and a second preset step is continuously executed to enable the terminal to transmit screen projection data to the display device.

Claims

1. A display device, characterized in that, include: A monitor is used to display the user interface. User interface, used to receive input signals; The controllers, connected to the display and user interface respectively, are used to perform: The system receives a screen mirroring link instruction from the terminal, interacts with the terminal via P2P protocol, and determines whether there is a first history of screen mirroring with the terminal. If the first historical record exists, and it is determined based on the version of the display device that the TCP protocol will be executed, then the TCP protocol will be established; Upon receiving the first preset step sent by the terminal, a first consent message is sent back to the terminal, and the second preset step is executed. The first preset step is sent by the terminal upon determining the existence of a second historical projection record with the display device. This first preset step is the initial step executed by the terminal as the initiator, after omitting some steps in the RTSP protocol interaction phase, based on the currently available data format and the playback capabilities supported by the display device obtained through prior negotiation. The second preset step is the remaining steps in the RTSP protocol interaction phase following the first preset step. If the first historical record does not exist, the first screen projection process is executed; the first screen projection process includes the TCP protocol interaction phase and the RTSP protocol interaction phase containing complete steps; When the RTSP protocol interaction phase is completed, the RTP protocol interaction phase is entered to receive the screen projection data transmitted by the terminal.

2. The display device according to claim 1, characterized in that, Before executing the first screen projection process if the first historical record does not exist, the controller is also used to perform the following: If the first historical record does not exist, the display is controlled to show a prompt message, which asks the user whether they agree to screen mirroring. If a screen mirroring consent command is received, the first screen mirroring process is executed; If a screen mirroring command is received indicating that the user does not agree to the screen mirroring, the screen mirroring operation will not be performed.

3. The display device according to claim 1, characterized in that, After receiving the first preset step sent by the terminal, the controller is further configured to perform: Based on the current playback capabilities of the display device, determine whether to agree to execute the first preset step; If the first preset step is agreed to be executed, a first consent message is sent to the terminal, and the second preset step is executed. If you do not agree to execute the first preset step, then execute the first screen projection process.

4. The display device according to claim 3, characterized in that, If a first historical record exists, after entering the TCP protocol interaction phase to establish the TCP protocol, the controller is also used to perform: If the first preset step is not received from the terminal, then the complete steps contained in the RTSP protocol interaction phase are executed.

5. A screen projection method, characterized in that, Applied to display devices, including: The system receives a screen mirroring link instruction from the terminal, interacts with the terminal via P2P protocol, and determines whether there is a first history of screen mirroring with the terminal. If the first historical record exists, and it is determined that the TCP protocol will be executed based on the version of the display device, then the TCP protocol is established; Upon receiving the first preset step sent by the terminal, a first consent message is sent back to the terminal, and the second preset step is executed. The first preset step is sent by the terminal upon determining the existence of a second historical projection record with the display device. This first preset step is the initial step executed by the terminal as the initiator, after omitting some steps in the RTSP protocol interaction phase, based on the currently available data format and the playback capabilities supported by the display device obtained through prior negotiation. The second preset step is the remaining steps in the RTSP protocol interaction phase following the first preset step. If the first historical record does not exist, the first screen projection process is executed; the first screen projection process includes the TCP protocol interaction phase and the RTSP protocol interaction phase containing complete steps; When the RTSP protocol interaction phase is completed, the RTP protocol interaction phase is entered to receive the screen projection data transmitted by the terminal.

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