CN102801944A - Implementation method for improving mobile high-definition link (MHL) television image display speed - Google Patents

Abstract

The invention discloses an implementation method for improving mobile high-definition link (MHL) television image display speed. The implementation method comprises the following steps that when an MHL interface is inserted into a mobile phone, a driver layer detects a hot-plug signal, and a hot plug detect (HPD) functional module is directly opened to transmit image data in the driver layer; an MHL interface insertion event is transmitted to a background daemon layer and a system service layer for synchronously updating the variable data, and the background daemon layer transmits a command of opening the HPD functional module and the variable data, shields the command of opening the HPD functional module and transmits the variable data; video is normally output; and when the MHL interface is unplugged from the mobile phone, the driver layer Kernel detects the hot-plug signal, a video data path is closed through the driver layer, the background daemon layer, the system service layer, the background daemon layer and the driver layer sequentially, and the HPD functional module is closed. The mobile phone image can be rapidly displayed on a television screen, the image can be accurately and smoothly displayed, the display time is saved, and the display speed and efficiency of the MHL television image are improved.

Description

A Realization Method of Improving MHL TV Image Display Speed

technical field

The invention relates to an MHL (abbreviation for Mobile High-Definition Link in English, i.e. mobile terminal high-definition audio-visual standard interface) TV image display technology, in particular to an implementation method for increasing the speed of MHL TV image display.

Background technique

When the MHL interface is plugged into the mobile phone, the driver layer Kernel will detect the hot plug signal and send the event to the background daemon, which then sends the message to the system service layer Service, and the system service layer Service will open The HPD (abbreviation of English hot plug detect, hot plug detection) function of the HDMI module (the abbreviation of English High Definition Multimedia Interface, that is, high-definition multimedia interface), and then send the message to the driver layer through the background protection layer Daemon Kernel. This is a big circle to turn on the HPD function to achieve the synchronization of some variables to avoid the problem of not being able to play the video and the video playback freeze. Although these problems can be solved, its disadvantage is that the response is slow, that is, after plugging into the MHL interface, it takes a long time to display the image of the mobile phone on the TV.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for improving the display speed of MHL TV images, which can quickly display mobile phone images on the TV screen, and can display images correctly and smoothly, saving display time , Improve the display speed and efficiency of MHL TV images.

In order to achieve the above object, the technical solution adopted in the present invention is, a kind of realization method that promotes MHL television image display speed, and its steps are as follows:

When the MHL interface is inserted into the mobile phone, the driver layer Kernel detects the hot plug signal, and directly opens the HPD function module in the driver layer to transmit image data; at the same time, the MHL interface insertion event is sent to the background protection layer Daemon and the system service layer Service for variable data Synchronous update, the background guard layer Daemon sends the command to open the HPD function module and transmits variable data to the driver layer Kernel, shields the command to open the HPD function module, and transmits variable data; the video is output normally;

When the MHL interface is pulled out from the mobile phone, the driver layer Kernel detects the hot plug signal. At this time, the video data path is closed through the driver layer Kernel, the background guard layer Daemon, the system service layer Service, the background guard layer Daemon, and the driver layer Kernel. At the same time close the HPD function module.

Further, the HPD functional module is set in the HDMI module.

Further, the described MHL interface insertion event is sent to the background guard layer Daemon and the system service layer Service including:

The driver layer sends an MHL status open message to the background guard layer; the background guard layer receives the MHL status open action message, and the background guard layer sends an MHL status open message to the system service layer, and the system service layer turns on the hot plug of the driver after receiving the message. function and realize the synchronization of variable data.

The variable data includes the opening of the HDMI module power supply, the opening of the HDMI interrupt, the starting of the HDMI timer and the selection of the HDMI register mode.

Compared with the prior art, the beneficial effects of the present invention are: when the hot plug signal is detected by the driver layer, the open command is directly sent to the HPD function module at the driver layer, and the driver layer, the background guard layer, the system service layer, The signal transmission process of the background guard layer and the driver layer updates the variable data, which can quickly display the mobile phone image on the TV screen, and can display the image correctly and smoothly, saving the display time and improving the display speed and efficiency of the MHL TV image .

Description of drawings

Fig. 1 is method flowchart of the present invention.

Detailed ways

The following will describe in detail with reference to the accompanying drawings in conjunction with the embodiments, so as to further explain the technical features and advantages of the present invention.

Method flowchart of the present invention is as shown in Figure 1, a kind of realization method of promoting MHL TV image display speed, and its steps are as follows:

When the MHL interface is inserted into the mobile phone, the driver layer Kernel detects the hot plug signal, and directly opens the HPD function module in the driver layer to transmit image data; at the same time, the MHL interface insertion event is sent to the background protection layer Daemon and the system service layer Service for variable data Synchronous update, the background guard layer Daemon sends the command to open the HPD function module and transmits variable data to the driver layer Kernel, shields the command to open the HPD function module, and transmits variable data; the video is output normally;

When the MHL interface is pulled out from the mobile phone, the driver layer Kernel detects the hot plug signal. At this time, the video data path is closed through the driver layer Kernel, the background guard layer Daemon, the system service layer Service, the background guard layer Daemon, and the driver layer Kernel. At the same time close the HPD function module.

Further, the HPD functional module is set in the HDMI module.

Further, the described MHL interface insertion event is sent to the background guard layer Daemon and the system service layer Service including:

The driver layer Kernel sends the MHL state open (MHL_STATE=ON) message to the background guard layer; the background guard layer receives the MHL state open action (action_mhl_state_on) message, and the background guard layer sends the MHL state open (HDMI_EVT_MHL_STATE_ON) message to the system service layer, and the system service After the layer receives the message, it enables the hot plug function of the driver and realizes the synchronization of some variable data.

The variable data includes the opening of the HDMI module power supply, the opening of the HDMI interrupt, the starting of the HDMI timer and the selection of the HDMI register mode.

According to the method for improving the display speed of MHL TV images provided by the present invention, the HPD function of the HDMI module is directly opened in the driver layer Kernel for speed transmission of image data, instead of opening the path of Kernel, Daemon, Service, Daemon, and Kernel The image is transferred only after the image is transferred, which saves opening time.

According to the method for promoting MHL TV image display speed provided by the present invention, in the path of Kernel, Daemon, Service, be used for the synchronization of some variable data. Only when the Daemon layer sends the command to open the HPD to the Kernel layer, it needs to be blocked, because the HPD function has already been turned on.

According to the method for improving the display speed of MHL TV images provided by the present invention, the step 4) is that when the MHL interface is pulled out from the mobile phone, the data path and the HPD function need to be closed, and Kernel, Daemon, Service, and Daemon still need to be used at this time , Kernel this path.

According to the method for improving the display speed of MHL TV images provided by the present invention, the display time can be increased by 0.5s to 1s, that is, the time from the MHL interface to the display on the TV can be about 0.5s to 1s faster than the traditional method.

When the hot plug signal is detected through the driver layer, the open command is directly sent to the HPD function module at the driver layer, and the variable data is updated through the signal transmission process of the driver layer, background guard layer, system service layer, background guard layer, and driver layer. The mobile phone image can be quickly displayed on the TV screen, and the image can be displayed correctly and smoothly, the display time is saved, and the display speed and efficiency of the MHL TV image are improved.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art to which the present invention belongs, any simple modification or optimization without departing from the concept of the present invention should be regarded as the protection scope of the present invention.

Claims (4)

1. implementation method that promotes MHL television image display speed, its step is following:

When MHL interface insertion mobile phone, Drive Layer detects the hot plug signal, in Drive Layer, directly opens the HPD functional module and carries out the transmitted image data; Simultaneously with MHL interface insertion incident send to the backstage guard the layer and system services layer carry out the synchronous renewal of variable data; The backstage is guarded the course Drive Layer and is sent the order of opening the HPD functional module and transmit variable data; The order that the HPD functional module is opened in shielding transmits variable data; Video is normally exported;

Extract from mobile phone when the MHL interface, Drive Layer detects the hot plug signal, guards that layer, system services layer, backstage are guarded layer, Drive Layer is closed the video data path this moment successively through Drive Layer, backstage, closes the HPD functional module simultaneously.

2. the implementation method of lifting MHL television image display speed according to claim 1, it is characterized in that: described HPD functional module is arranged in the HDMI module.

3. the implementation method of lifting according to claim 2 MHL television image display speed is characterized in that, describedly MHL interface insertion incident is sent to layer is guarded on the backstage and system services layer comprises:

Drive Layer is guarded layer transmission MHL state to the backstage and is opened message; The backstage is guarded layer and is received that MHL state opening action message, backstage guards the course system services layer and send the MHL state and open message, system services layer receive open the hot plug function of driving after this message and realize variable data synchronously.

4. the implementation method of lifting according to claim 3 MHL television image display speed is characterized in that: described variable data comprises that unlatching, the HDMI of HDMI modular power source interrupt opens, the startup of HDMI timer and the selection of HDMI register mode.

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