CN104079855A - Digital video device and method for reading EDID of HDMI - Google Patents
Digital video device and method for reading EDID of HDMI Download PDFInfo
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- CN104079855A CN104079855A CN201410289777.4A CN201410289777A CN104079855A CN 104079855 A CN104079855 A CN 104079855A CN 201410289777 A CN201410289777 A CN 201410289777A CN 104079855 A CN104079855 A CN 104079855A
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- edid
- hdmi
- processor
- switch
- multiselect
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Abstract
The invention discloses a digital video device and a method for reading EDID of an HDMI to remove an EEPROM for storing the EDID. According to the technical scheme, the digital video device comprises a processor, the multi-path HDMI, a one-out-more selective switch and a signal processing part, and is characterized in that the processor is connected with the one-out-more selective switch, the signal processing part is connected with the multi-path HDMI through the one-out-more selective switch, and the signal processing part is connected with the processor. The digital video device and the method have the advantages that the EDID are stored through a main program FLASH, and therefore a device and a method of the EEPROM device are omitted; the complexity of the digital video device is simplified, the cost is reduced, and the method is suitable for the digital video device with the multi-path HDMI.
Description
Technical field
The invention belongs to digital multimedia technical field, particularly a kind of digital-video equipment and HDMI interface EDID method for reading data.
Background technology
Along with the develop rapidly of Contemporary Digital technology, most of digital-video equipment, all with HDMI (High Definition Multimedia) interface, HDMI interface is a kind of digital signal interface relatively more conventional in current 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 Standards Association), therefore application is more and more extensive.According to HDMI standard-required, interface needs one group of EDID (EDID: extending display identification data (Extended Display Identification Data) are a kind of VESA standard data formats, wherein comprise the parameter about monitor and performance thereof, comprise supplier information, maximum image size, color arranges, manufacturer pre-sets, the character string of the restriction of frequency range and display name and sequence number) data, so that transmitting and receiving device is normally worked on request, the general required EDID data of EEPROM storage HDMI interface of a HDMI port arrangement that adopt of current TV receiving apparatus, along with the development of TV receiving apparatus technology, HDMI interface has developed into 2 roads or even more multichannel of 3 tunnels from 1 road, this means that TV receiving apparatus just needs 2 or 3 even more EEPROM.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of digital-video equipment and HDMI interface EDID method for reading data are provided, to cancel storage EDID data EEPROM.
For achieving the above object, digital-video equipment of the present invention, comprise processor, multi-path HDMI interfaces, multiselect one switch, signal processing unit, it is characterized in that, processor is connected with multiselect one switch, signal processing unit is connected with multi-path HDMI interfaces by multiselect one switch, and signal processing unit is connected with processor;
HDMI interface EDID method for reading data of the present invention, is characterized in that, comprises the following steps:
A. processor initialization and multiselect one switch initialization;
B. processor calls the EDID data of storing in main program FLASH;
C. processor arrives EDID transfer of data the EDID buffer area of multiselect one switch;
D. multi-path HDMI interfaces is from the EDID buffer area reading out data of multiselect one switch.
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-video equipment, also reduced cost.
Brief description of the 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 accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, in the time that perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in here and will be left in the basket.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The invention provides a kind of digital-video equipment and the method thereof that can cancel storage EDID data EEPROM, on hardware, save eeprom memory, directly adopt the FLASH storage EDID data of main program, and utilize software transfer, simplify the complexity of digital-video equipment, also reduced cost.
Embodiment
This example, taking the Digital Television with 3 road HDMI inputs as example, is set forth technical scheme of the present invention, and concrete pie graph is as Fig. 2, and its system flow chart is as Fig. 3, and prior art contrast pie graph is as Fig. 1.
As Fig. 2, the Digital Television with 3 road HDMI inputs of this example comprises a three elections switch, a processor, three HDMI interfaces, signal processing unit.Control signal is provided by iic bus by processor.In the time selecting the HDMI signal of a certain road input, processor sends control signal, controls three elections switch and selects correct HDMI input signal, and the bus signals in HDMI line is linked the EDID buffer area in 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, in the time that the processor of equipment and three elections switch power on, first processor calls the EDID data of storing in main program FLASH, be transferred to the EDID buffer area in three elections switch by iic bus again, the bus signals of the HDMI interface of then, choosing calls EDID data from the EDID buffer area of three elections switch.
The Digital Television with 3 road HDMI inputs that can be found out prior art by Fig. 1 and Fig. 2 contrast needs three eeprom memories just can meet related needs, and the present invention without any need for eeprom memory just can meet related needs.
Described in the present embodiment, technical scheme is equally applicable to panel TV, projection TV, CRT TV, LCD LCD TV, HDMI relay forwarding etc.
Although above the illustrative embodiment of the present invention is described; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various variations appended claim limit and definite the spirit and scope of the present invention in, these variations are apparent, all utilize innovation and creation that the present invention conceives all at the row of protection.
Claims (3)
1. a digital-video equipment, comprise processor, multi-path HDMI interfaces, multiselect one switch, signal processing unit, it is characterized in that, processor is connected with multiselect one switch, signal processing unit is connected with multi-path HDMI interfaces by multiselect one switch, and signal processing unit is connected with processor.
2. digital-video equipment according to claim 1, is characterized in that, described digital-video equipment comprises panel TV, HDMI relay forwarding, digital video playback devices.
3. a HDMI interface EDID method for reading data, is characterized in that, comprises the following steps:
A. processor initialization and multiselect one switch initialization;
B. processor calls the EDID data of storing in main program FLASH;
C. processor arrives EDID transfer of data the EDID buffer area of multiselect one switch;
D. multi-path HDMI interfaces is from the EDID buffer area reading out data of multiselect one switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289777.4A CN104079855A (en) | 2014-06-25 | 2014-06-25 | Digital video device and method for reading EDID of HDMI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410289777.4A CN104079855A (en) | 2014-06-25 | 2014-06-25 | Digital video device and method for reading EDID of HDMI |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104079855A true CN104079855A (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410289777.4A Pending CN104079855A (en) | 2014-06-25 | 2014-06-25 | Digital video device and method for reading EDID of HDMI |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI560691B (en) * | 2016-04-07 | 2016-12-01 | Mstar Semiconductor Inc | Method for reading identification data from display and associated processing circuit |
| CN109922293A (en) * | 2017-12-12 | 2019-06-21 | 杭州海康威视数字技术股份有限公司 | The conduction method of EDID equipment and EDID information transfer channel |
| CN109936708A (en) * | 2019-04-28 | 2019-06-25 | 科大讯飞股份有限公司 | A kind of VGA video switching device, method and system |
-
2014
- 2014-06-25 CN CN201410289777.4A patent/CN104079855A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI560691B (en) * | 2016-04-07 | 2016-12-01 | Mstar Semiconductor Inc | Method for reading identification data from display and associated processing circuit |
| CN109922293A (en) * | 2017-12-12 | 2019-06-21 | 杭州海康威视数字技术股份有限公司 | The conduction method of EDID equipment and EDID information transfer channel |
| CN109936708A (en) * | 2019-04-28 | 2019-06-25 | 科大讯飞股份有限公司 | A kind of VGA video switching device, method and system |
| CN109936708B (en) * | 2019-04-28 | 2021-05-04 | 科大讯飞股份有限公司 | VGA video switching device, method and system |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20141001 |