CN101257591A - Digital multimedia receiving apparatus and extending display identification data reading method thereof - Google Patents
Digital multimedia receiving apparatus and extending display identification data reading method thereof Download PDFInfo
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- CN101257591A CN101257591A CNA2008103005393A CN200810300539A CN101257591A CN 101257591 A CN101257591 A CN 101257591A CN A2008103005393 A CNA2008103005393 A CN A2008103005393A CN 200810300539 A CN200810300539 A CN 200810300539A CN 101257591 A CN101257591 A CN 101257591A
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Abstract
The invention relates to a digital multimedia technology, and provides a digital multimedia receiving device and method thereof which can cancel EEPROM for storing EDID data. The technical scheme is that: a digital multimedia receiving device comprises a processor, a multi-channel HDMI interface, a one-of-multi switch, a signal processing part, characterized in that the processor is connected with the one-of-multi switch, the signal processing part is connected with the multi-channel HDMI interface through the one-of-multi switch, the signal processing part is connected with the processor, the multi-channel HDMI interface is connected with the internal buffer through buses. The beneficial effect of the invention is that: the device and method uses FLASH of the main program to store the EDID data for canceling EEPROM, which not only simplifies the complexity of digital multimedia receiving device, but also reduces costs, is applicable for digital multimedia receiving device with the multi-channel HDMI interface.
Description
Technical field
The present invention relates to a kind of digital multimedia technology, particularly digital multimedia receiving apparatus.
Background technology
Develop rapidly along with current digital technology, most of digital multimedia receiving apparatus, all have HDMI (HighDefinition Multimedia) interface, the HDMI interface is a kind of digital signal interface relatively more commonly used in the present audio frequency and video transmitting and receiving device, because it can support the display format in EIA/CEA-861B and two standards of VESA (Video Electronics StandardsAssociation), therefore use more and more widely.According to the HDMI standard-required, interface needs one group of EDID data (Extended Display Identification Data extending display identification data), the EDID data are a kind of VESA standard data formats, the parameter that wherein comprises relevant monitor and performance thereof, comprise supplier information, the maximum image size, color is provided with, manufacturer pre-sets, the character string of the restriction of frequency range and display name and sequence number, so that transmitting and receiving device is operate as normal on request, the general required EDID data of EEPROM storage HDMI interface of a HDMI port arrangement that adopt of present TV receiving apparatus, development along with the TV receiving apparatus technology, the HDMI interface develops into 2 the road or 3 the tunnel even multichannel more from 1 the road, this means that TV receiving apparatus just needs 2 or 3 even more EEPROM, and general multiselect one switch such as PS321 etc. there is buffer area.
Summary of the invention
Technical problem to be solved by this invention just provides a kind of digital multimedia receiving apparatus and the EDID method for reading data that can cancel the EEPROM of storage EDID data.
The present invention solves its technical problem, the technical scheme that adopts is, digital multimedia receiving apparatus, comprise processor, multichannel HDMI interface, multiselect one switch, signal processing unit, it is characterized in that processor is connected with multiselect one switch, signal processing unit is connected with multichannel HDMI interface by multiselect one switch, signal processing unit is connected with processor, and multichannel HDMI interface is connected with multiselect one switch inner buffer district by bus;
Concrete, described multiselect one switch inner buffer district is used to store the EDID data;
Digital multimedia receiving apparatus HDMI interface EDID method for reading data of the present invention is characterized in that, may further comprise the steps:
A. processor initialization and multiselect one switch initialization;
B. processor calls the EDID data of storing among the main program FLASH;
C. processor arrives multiselect one switch inner buffer district with the EDID transfer of data;
The d.HDMI interface is from multiselect one switch inner buffer district reading of data.
The invention has the beneficial effects as follows, adopt the FLASH storage EDID data of main program, thereby cancel equipment and the method for EEPROM, not only simplified the complexity of digital multimedia receiving apparatus, also reduced cost.
Description of drawings
Fig. 1 is the pie graph of the Digital Television of existing multichannel HDMI input;
Fig. 2 is the pie graph of embodiment;
Fig. 3 is the system flow chart of embodiment.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The invention provides a kind of digital multimedia receiving apparatus and the method thereof that can cancel storage EDID data with EEPROM, saved eeprom memory on the hardware, directly adopt the FLASH storage EDID data of main program, and utilize software transfer to be stored in multiselect one switch inner buffer district, and the inner buffer district is connected by bus with multichannel HDMI interface, then simplify the complexity of digital multimedia receiving apparatus, also reduced cost.
Embodiment
This example is an example with the Digital Television with 3 road HDMI input, sets forth the technical solution of the utility model, concrete pie graph such as Fig. 2, its system flow chart such as Fig. 3, prior art contrast pie graph such as Fig. 1.
As Fig. 2, the Digital Television with 3 road HDMI input of this example comprises a three elections switch (as PS321), a processor, three HDMI interfaces, signal processing unit.Control signal is provided by iic bus by processor.When selecting the HDMI signal of a certain road input, processor sends control signal, and the control three elections switch is selected correct HDMI input signal, and the bus signals in the HDMI line is linked the EDID buffer area in the three elections switch.Signal processing unit is connected with three HDMI interfaces by three elections switch.The flow process of system works as shown in Figure 3, when the processor of equipment and three elections switch power on, at first processor calls the EDID data of storing among the main program FLASH, be transferred to three elections switch inner buffer district by iic bus again, the bus signals of the HDMI interface of choosing then, calls the EDID data of having stored from three elections switch inner buffer district.
The Digital Television with 3 road HDMI input that is contrasted prior art as can be seen by Fig. 1 and Fig. 2 needs three eeprom memories just can satisfy related needs, and the utility model without any need for eeprom memory just can satisfy related needs.
The described technical scheme of present embodiment is equally applicable to panel TV, projection TV, CRT TV, LCD LCD TV etc.
Because each physical circuit in the technical solution of the present invention all belongs to this area routine techniques, no longer describe in detail herein.Those of ordinary skill in the art according to foregoing description, can adopt various circuit to realize technical scheme of the present invention, and it all belongs to protection scope of the present invention.
Claims (4)
1. digital multimedia receiving apparatus, comprise processor, multichannel HDMI interface, multiselect one switch, signal processing unit, it is characterized in that, processor is connected with multiselect one switch, signal processing unit is connected with multichannel HDMI interface by multiselect one switch, signal processing unit is connected with processor, and multichannel HDMI interface is connected with multiselect one switch inner buffer district by bus.
2. according to the described digital multimedia receiving apparatus of claim 1, it is characterized in that described multiselect one switch inner buffer district is used to store the EDID data.
3. according to claim 1 or 2 described digital multimedia receiving apparatus, it is characterized in that described digital multimedia device comprises panel TV, projection TV, CRT TV, LCD LCD TV.
4. digital multimedia receiving apparatus HDMI interface EDID method for reading data is characterized in that, may further comprise the steps:
A. processor initialization and multiselect one switch initialization;
B. processor calls the EDID data of storing among the main program FLASH;
C. processor arrives multiselect one switch inner buffer district with the EDID transfer of data;
The d.HDMI interface is from multiselect one switch inner buffer district reading of data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103005393A CN101257591A (en) | 2008-03-12 | 2008-03-12 | Digital multimedia receiving apparatus and extending display identification data reading method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008103005393A CN101257591A (en) | 2008-03-12 | 2008-03-12 | Digital multimedia receiving apparatus and extending display identification data reading method thereof |
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| Publication Number | Publication Date |
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| CN101257591A true CN101257591A (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008103005393A Pending CN101257591A (en) | 2008-03-12 | 2008-03-12 | Digital multimedia receiving apparatus and extending display identification data reading method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916592A (en) * | 2010-09-08 | 2010-12-15 | 福建捷联电子有限公司 | Burning-free method for liquid crystal display television HDMI EDID |
| CN103295554A (en) * | 2012-02-27 | 2013-09-11 | 冠捷投资有限公司 | Integrated circuit capable of providing extension display sign data based on image signals |
| CN103391475A (en) * | 2013-06-24 | 2013-11-13 | 青岛海信电器股份有限公司 | Display device and intelligent device |
| CN105450966A (en) * | 2015-12-17 | 2016-03-30 | 福建新大陆通信科技股份有限公司 | Method for switching HDMI input source of set top box |
| CN107391071A (en) * | 2017-07-31 | 2017-11-24 | 苏州佳世达电通有限公司 | Display device and the interface switching method for display device |
| CN108924458A (en) * | 2018-08-06 | 2018-11-30 | 青岛海信电器股份有限公司 | For EDID data rewriting method, device and display terminal with HDMI extended channel |
-
2008
- 2008-03-12 CN CNA2008103005393A patent/CN101257591A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101916592A (en) * | 2010-09-08 | 2010-12-15 | 福建捷联电子有限公司 | Burning-free method for liquid crystal display television HDMI EDID |
| CN103295554A (en) * | 2012-02-27 | 2013-09-11 | 冠捷投资有限公司 | Integrated circuit capable of providing extension display sign data based on image signals |
| CN103391475A (en) * | 2013-06-24 | 2013-11-13 | 青岛海信电器股份有限公司 | Display device and intelligent device |
| CN105450966A (en) * | 2015-12-17 | 2016-03-30 | 福建新大陆通信科技股份有限公司 | Method for switching HDMI input source of set top box |
| CN107391071A (en) * | 2017-07-31 | 2017-11-24 | 苏州佳世达电通有限公司 | Display device and the interface switching method for display device |
| CN108924458A (en) * | 2018-08-06 | 2018-11-30 | 青岛海信电器股份有限公司 | For EDID data rewriting method, device and display terminal with HDMI extended channel |
| CN108924458B (en) * | 2018-08-06 | 2021-12-07 | 海信视像科技股份有限公司 | EDID data rewriting method and device for HDMI extended channel and display terminal |
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Open date: 20080903 |