CN102420966A - Conference television video output EDID (Extended Display Identification Data) processing method and system - Google Patents

Conference television video output EDID (Extended Display Identification Data) processing method and system Download PDF

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Publication number
CN102420966A
CN102420966A CN201110378212XA CN201110378212A CN102420966A CN 102420966 A CN102420966 A CN 102420966A CN 201110378212X A CN201110378212X A CN 201110378212XA CN 201110378212 A CN201110378212 A CN 201110378212A CN 102420966 A CN102420966 A CN 102420966A
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edid
monitor
video
service component
module
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CN201110378212XA
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余师棠
冯涛
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ZTE Corp
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ZTE Corp
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Abstract

The invention discloses a conference television video output EDID (Extended Display Identification Data) processing method and system, belonging to the field of multimedia video. The method comprises the steps: a drive module of a conference television terminal queries EDID data of a monitor and sends the EDID data to a service assembly module of the conference television terminal; the service assembly module generates a configuration system command according to the EDID data and sends the configuration system command to a system conversion device; and the system conversion device generates a video signal adapting to the configuration system mode according to the configuration system command and outputs the video signal to the monitor. The conference television terminal disclosed by the invention outputs the corresponding video signal according to the queried EDID data of the monitor, solves the problem of unsuitability of video systems and resolutions supported by the video output mode and system of the conference television terminal and the monitor connected with an output interface, and has the beneficial effects of being capable of automatically selecting an output mode and system and being also capable of furthest developing display characteristics of the monitor.

Description

A kind of video conferencing video output EDID processing method and system
Technical field
The present invention relates to the multimedia video field, particularly a kind of video conferencing video is exported EDID (Extended Display Identification Data, extending display identification data) processing method and system.
Background technology
EDID is a kind of VESA (Video Electronics Standards Association; VESA) standard data format; Wherein comprise the monitor of relevant video conferencing and the parameter of performance thereof, comprise that supplier information, maximum image size, color settings, manufacturer pre-set, the restriction of frequency range and the character string of display title and sequence number.
Video conference terminal is supported the various video output interface; Comprise VGA (Video Graphics Array; Video Graphics Array), Ypbpr (aberration of lining by line scan output), SDI (serial digital interface, digital serial interface), HDMI (High Definition Multimedia Interface, HDMI) etc.; And the monitor that each interface connect is because differences such as producers, model, and the video formats of being supported, resolution etc. are also inequality.If manual work is provided with the video output mode standard, the situation of exporting no image, can not giving full play to display characteristic is often arranged.
Summary of the invention
The object of the present invention is to provide a kind of video conferencing video output EDID processing method and system; Can solve video mode, standard, the resolution that video output mode and the standard of video conference terminal and monitor that output interface is connect support better and be not suitable for, and artificial the problem that the video output mode standard often has the no image of output and do not give full play to display characteristic is set.
According to an aspect of the present invention, a kind of video conferencing video output EDID processing method is provided, said method comprises:
The EDID data of the driver module of video conference terminal inquiry monitor also send to said EDID data the Service Component module of video conference terminal;
Said Service Component module generates the order of configuration standard and sends to the system conversion device according to said EDID data;
Said system conversion device generates the vision signal that adapts with said configuration standard order and exports to said monitor according to said configuration standard order.
Wherein, the EDID data of driver module inquiry monitor and the step that sends to the Service Component module comprise:
Said driver module receives the EDID querying command that said Service Component module is sent;
Said driver module reads the EDID data of said monitor according to said EDID querying command;
Said driver module sends to said Service Component module with the EDID data that read.
Wherein, the Service Component module step that generates the order of configuration standard according to said EDID data and send to the system conversion device comprises:
Pattern and standard that video mode that said Service Component module is supported according to said EDID data and said video conference terminal and standard are confirmed said monitor;
Said Service Component sends to said system conversion device with the pattern and the standard of determined monitor;
Wherein, the said system conversion device step that generates vision signal and export to monitor comprises:
Said system conversion device generates the vision signal that adapts according to determined pattern and standard;
Said system conversion device is exported to said monitor with said vision signal.
Wherein,, driver module also comprises before receiving EDID querying command step:
The Service Component module is sent the EDID querying command to driver module after said video conference terminal powers on.
Wherein,
When the EDID data that said driver module detects said monitor change, send the EDID change events to said Service Component module;
After said Service Component receives said EDID change events, send the EDID querying command to said driver module.
Wherein,
The media device layer of said video conference terminal regularly sends the EDID querying command to said driver module.
According to a further aspect in the invention, a kind of video conferencing video output EDID treatment system is provided, said system comprises:
The driver module of video conference terminal is used to inquire about the EDID data of monitor and said EDID data is sent to the Service Component module of video conference terminal;
The Service Component module of video conference terminal is used for generating the order of configuration standard and sending to the system conversion device according to said EDID data;
The system conversion device of video conference terminal is used for generating the vision signal that adapts with said configuration standard order and exporting to said monitor according to said configuration standard order;
Monitor is used to provide the EDID data and shows said vision signal.
Wherein,
Said driver module also is used for behind the EDID querying command that receives said Service Component module transmission, reading the EDID data of said monitor and the EDID data that read being sent to said Service Component module according to said EDID querying command.
Wherein,
Pattern and standard that video mode that said Service Component module also is used for supporting according to said EDID data and said video conference terminal and standard are confirmed said monitor.
Compared with prior art, beneficial effect of the present invention is: the present invention not only can select the output mode standard automatically, and performance monitor display characteristic that more can maximum performance has improved user's experience well.
Description of drawings
Fig. 1 is the schematic diagram of a kind of video conferencing video output EDID processing method that provides of the embodiment of the invention;
Fig. 2 is the flow chart of a kind of video conferencing video output EDID processing method that provides of the embodiment of the invention;
Fig. 3 is the structural representation of a kind of video conferencing video output EDID treatment system that provides of the embodiment of the invention;
Fig. 4 is driver module, the media device module of a kind of video conference terminal of providing of the embodiment of the invention, the structural representation of Service Component module.
Embodiment
, should be appreciated that following illustrated preferred embodiment only is used for explanation and explains the present invention, and be not used in qualification the present invention a preferred embodiment of the present invention will be described in detail below in conjunction with accompanying drawing.
Fig. 1 is the schematic diagram of a kind of video conferencing video output EDID processing method that provides of the embodiment of the invention, and as shown in Figure 1, said method comprises:
Step S101, the EDID data of the driver module of video conference terminal inquiry monitor also send to said EDID data the Service Component module of video conference terminal;
Step S102, said Service Component module generates the order of configuration standard and sends to the system conversion device according to said EDID data;
Step S103, said system conversion device generates the vision signal that adapts with said configuration standard order and exports to said monitor according to said configuration standard order.
Fig. 2 is the flow chart of a kind of video conferencing video output EDID processing method that provides of the embodiment of the invention, and as shown in Figure 2, said method comprises:
Step S201, the video output parameter of configuration video conference terminal.
The user directly clicks each button arrangement EDID query function through the human-computer interaction interface GUI (Graphical User Interface, graphical user interface) or the web page (webpage), and this configuration uses video output interface pattern and format configuration interface to accomplish.Not all video conference terminal is all supported the EDID query function, whether supports that the EDID inquiry is to judge through the optional tabulation of video mode in the video output interface ability of video conference terminal, the optional tabulation of video format.If in the optional tabulation of video mode auto options is arranged, both showed and can inquire about automatically the video mode of video conference terminal, also can inquire about automatically the video format of video conference terminal.If under a certain specific video pattern, in the optional tabulation of video format auto options is arranged, show and under the current video pattern, to inquire about automatically video format.If the optional tabulation of video mode in the video output interface ability of video conference terminal, the optional tabulation of video format all do not have auto options, show that then video conference terminal do not support the EDID query function.
If the user does not dispose the video mode and the standard of each interface of video conference terminal, then the pattern of each interface of system default and standard all are auto options.
Step S202 determines whether to launch the EDID inquiry.
The Service Component module of video conference terminal is exported configuration parameter according to current video, confirms whether video output interface need launch the EDID inquiry.Carry out EDID inquiry meeting consume system resources, so video conference terminal at first judges whether to launch the EDID inquiry.If the video mode of the video output interface of video conference terminal or video format are automatically, then, launches video conference terminal the EDID inquiry of this interface after powering on, execution in step S203; If the video format of video output interface is not automatically, then this interface is not launched EDID inquiry, execution in step S205.
Step S203 carries out the EDID inquiry and obtains the EDID data.
Video conference terminal obtains the EDID data of monitor.The Service Component module notice driver module inquiry EDID data of video conference terminal.The EDID query unit of driver module directly reads the EDID data of monitor, resolves to the structure variable then, comprises the video mode of support, the video formats number of support among the structure member, and various video formats.When the monitor of being inquired about was not supported EDID, the EDID query unit of driver module was returned negative value, and successful inquiring then returns 0.Under the VGA pattern, for reducing EDID inquiry burden, after reading complete EDID data, the video formatted data field can be only checked in follow-up inspection, when video formatted data changes, just reads complete EDID data again.Video formatted data is because be according to priority arrangement; So do not need complete inspection yet; As long as read a corresponding byte of current video form from EDID; Current real data and the data cached consistent remainder data that then stops to read when reading failure or the data that read and data cached when inconsistent, should read whole EDID data again.This process is invisible to other subsystems, and the EDID Query Result that the EDID query unit is returned is the current complete capability set after driver module is handled.
Step S204, Service Component confirm the video output parameter, issue the order of configuration output standard.
After the Service Component module is obtained the EDID data, select the best video output parameter according to preference policy.The video format that EDID data that the Service Component module is returned according to driver module and video conference terminal self are supported selects video output parameter such as corresponding resolution to generate the order of configuration standard and be handed down to driver module.When monitor was not supported EDID or do not connected monitor, the EDID Query Result was empty, and the Service Component module need dispose the video format of an acquiescence for video interface.The interface mode of operation is then selected acquiescence video format 720P60 as being YPbPr at this moment; The interface mode of operation is then selected acquiescence video format XGA60 as being VGA; The interface mode of operation is HDMI and DVI, then selects acquiescence video format 720P60.
The Service Component module need be safeguarded two cover configuration datas of video output interface; First cover is user's configuration data; Be that video mode or form are automatic video output parameter; Second cover is the real work parameter of video output interface, the actual video output parameter of promptly confirming through the preferred back of EDID inquiry.
Step S205, the video output parameter of driver module configuration interface.
If video conference terminal has started the EDID query function, then driver module is that the system conversion device carries out the output parameter configuration according to the configuration standard order docking port of Service Component transmission.
If do not launch the EDID query function, then directly to use the data docking port of step S201 configuration be that the system conversion device carries out the output parameter configuration to driver module.
Step S206, interface according to the configuration video output parameter outputting video signal to monitor.
Interface according to the video output parameter outputting video signal of driver module configuration to monitor.
Step S207, driver module have judged whether the EDID change events.
When the EDID ability that driver module detects monitor changes, can report the media device module with the mode of incident.The media device module reports the Service Component module again.The plug detecting unit of driver module is to aim at the monitor of supporting hot plug to be provided with; Such as HDMI, DVI output; When the plug detection plugged to hardware, driver module called the callback interface function of media device module, and the parameter of carrying is current DA (digital-to-analog conversion, a digital-to-analogue conversion) index value; The informing business assembly module (is supported the situation of multiple output when front port changes for an interface; The media device module can be mapped to interface ID with concrete DA), after the Service Component module receives the notice of EDID change events, issue the EDID result queries and order to the media device module; Media device module invokes driver module carries out EDID inquiry, execution in step S203.
Step S208, the media device module judges whether the regularly time of inquiry.
For the interface of not supporting hot plug, need regularly inquire about the EDID data.The media device module is regularly inquired about the EDID results change through calling driver module.The EDID timing enquiry module of media device module is the EDID query unit of calling driver module at regular intervals; Regularly inquiry is when the EDID data of front port; Then with EDID data comparison before, if the EDID data consistent does not then deal with, if the inconsistent Query Result that then calls the media device module reports the unit when changing; The event handling unit of informing business assembly module changes when front port EDID inquires about; After the Service Component module is received Query Result change incident, initiatively issue inquiry EDID order, execution in step S203.
Fig. 3 is the structural representation of a kind of video conferencing video output EDID treatment system that provides of the embodiment of the invention; As shown in Figure 3; Said system comprises: video conference terminal and monitor, wherein video conference terminal comprises Service Component module, media device module, driver module and system conversion device.
The driver module of video conference terminal is used to inquire about the EDID data of monitor and said EDID data is sent to the Service Component module of video conference terminal.As shown in Figure 4, driver module comprises Drive Layer EDID control unit, EDID query unit, plugs detecting unit, the DA unit is set.Wherein, the EDID querying command that sends through the media device module of the EDID control unit of the Drive Layer Service Component layer EDID control unit that is used to receive the Service Component module and control the EDID query unit; The EDID query unit is used to read the EDID data of said monitor and the EDID data that read is sent to said Service Component module through media device module EDID result queries unit; The plug detecting unit is used for the hot plug incident of detection monitor, if detect the hot plug incident, when the Query Result of media device module changes, reports the unit to send to the preference policy unit through the event handling unit of Service Component; Video output parameter that the DA unit is used for issuing according to Service Component is set, and interface is set is the system conversion device.
The Service Component module of video conference terminal is used for generating the order of configuration standard and sending to the system conversion device according to said EDID data.As shown in Figure 4, the Service Component module comprises Service Component layer EDID control unit, event handling unit, preference policy unit, status information element.Wherein, the event handling unit is used for when the EDID change events notice when front port EDID data change of receiving that the media device module transmits, calling the EDID result queries unit of media device module; The video mode that the preference policy unit is used for supporting according to said EDID data and said video conference terminal and the state information of standard bonding state information unit record are confirmed the pattern and the standard of said monitor, then video output parameters such as the pattern of confirming and standard are promptly disposed the DA that standard order is handed down to the media device module unit is set; Status information element be used to safeguard the video output parameter relevant information and with the U1 interface be the interactive interfacing of remote controller or WEB; The EDID control unit of Service Component is used to control issuing of EDID querying command.
The media device module of video conference terminal is used for being responsible for the communication between Service Component module and the driver module.As shown in Figure 4, the media device module comprises that regularly query unit, Query Result report unit, DA that the unit is set when changing for media device layer EDID control unit, EDID result queries unit, EDID.Wherein, EDID regularly query unit is for the monitor of not supporting hot plug designs, and is used for the EDID query interface of calling driver module at regular intervals, regularly inquires about the EDID data of the monitor that connects when front port; Query Result reports the unit to be used for informing business assembly module when the EDID data change when changing event handling unit changes when front port EDID inquires about; Media device layer EDID control unit is used to receive the order that Service Component layer EDID control unit issues and sends to Drive Layer EDID control unit; EDID result queries unit is used for the EDID query unit inquiry EDID data according to the inquiry EDID data command calling driver module of media device layer EDID control unit transmission; DA be provided with video output parameter calling driver module such as pattern and the standard of the monitor that configuration standard order that the unit is used for issuing according to the Service Component module promptly confirms the video output parameter that the DA unit is provided with interface is set is the video output parameter of video change-over device.
The system conversion device of video conference terminal is used for generating the vision signal that adapts with said configuration standard order and exporting to said monitor according to said configuration standard order.The system conversion device comprises interface and DA, and wherein, an interface can corresponding one or two DA.The system conversion device of video conference terminal can have a plurality of, different different video output signals of system conversion device output.
Monitor is used to provide the EDID data and shows said vision signal.
In sum; The present invention is through the EDID data of inquiry monitor and according to said EDID data output corresponding video signals; Having solved video formats, the resolution that video output mode and the standard of video conference terminal and monitor that output interface is connect support is not suitable for; And the artificial video output mode standard that is provided with often has the problem of exporting no image and not giving full play to display characteristic; The present invention not only can select the output mode standard automatically, and performance monitor display characteristic that more can maximum performance has improved user's experience well.
Although preceding text specify the present invention, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of doing according to the principle of the invention all are to be understood that to falling into protection scope of the present invention.

Claims (10)

1. a video conferencing video is exported the EDID processing method, it is characterized in that said method comprises:
The EDID data of the driver module of video conference terminal inquiry monitor also send to said EDID data the Service Component module of video conference terminal;
Said Service Component module generates the order of configuration standard and sends to the system conversion device according to said EDID data;
Said system conversion device generates the vision signal that adapts with said configuration standard order and exports to said monitor according to said configuration standard order.
2. method according to claim 1 is characterized in that, the EDID data of driver module inquiry monitor and the step that sends to the Service Component module comprise:
Said driver module receives the EDID querying command that said Service Component module is sent;
Said driver module reads the EDID data of said monitor according to said EDID querying command;
Said driver module sends to said Service Component module with the EDID data that read.
3. method according to claim 1 is characterized in that, the Service Component module generates the step that disposes the standard order and send to the system conversion device according to said EDID data and comprises:
Pattern and standard that video mode that said Service Component module is supported according to said EDID data and said video conference terminal and standard are confirmed said monitor;
Said Service Component sends to said system conversion device with the pattern and the standard of determined monitor.
4. method according to claim 3 is characterized in that, the step that said system conversion device generates vision signal and exports to monitor comprises:
Said system conversion device generates the vision signal that adapts according to determined pattern and standard;
Said system conversion device is exported to said monitor with said vision signal.
5. method according to claim 2 is characterized in that, before driver module receives EDID querying command step, also comprises:
The Service Component module is sent the EDID querying command to driver module after said video conference terminal powers on.
6. method according to claim 2 is characterized in that,
When the EDID data that said driver module detects said monitor change, send the EDID change events to said Service Component module;
After said Service Component receives said EDID change events, send the EDID querying command to said driver module.
7. method according to claim 2 is characterized in that,
The media device layer of said video conference terminal regularly sends the EDID querying command to said driver module.
8. a video conferencing video is exported the EDID treatment system, it is characterized in that said system comprises:
The driver module of video conference terminal is used to inquire about the EDID data of monitor and said EDID data is sent to the Service Component module of video conference terminal;
The Service Component module of video conference terminal is used for generating the order of configuration standard and sending to the system conversion device according to said EDID data;
The system conversion device of video conference terminal is used for generating the vision signal that adapts with said configuration standard order and exporting to said monitor according to said configuration standard order;
Monitor is used to provide the EDID data and shows said vision signal.
9. system according to claim 8 is characterized in that,
Said driver module also is used for behind the EDID querying command that receives said Service Component module transmission, reading the EDID data of said monitor and the EDID data that read being sent to said Service Component module according to said EDID querying command.
10. system according to claim 8 is characterized in that,
Pattern and standard that video mode that said Service Component module also is used for supporting according to said EDID data and said video conference terminal and standard are confirmed said monitor.
CN201110378212XA 2011-11-24 2011-11-24 Conference television video output EDID (Extended Display Identification Data) processing method and system Pending CN102420966A (en)

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Application publication date: 20120418