CN104469212A - Spliced display wall OSD display method and system - Google Patents

Spliced display wall OSD display method and system Download PDF

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CN104469212A
CN104469212A CN201410831664.2A CN201410831664A CN104469212A CN 104469212 A CN104469212 A CN 104469212A CN 201410831664 A CN201410831664 A CN 201410831664A CN 104469212 A CN104469212 A CN 104469212A
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osd
picture signal
display
data bitmap
spliced
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CN104469212B (en
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陈斌
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Vtron Technologies Ltd
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Vtron Technologies Ltd
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Abstract

The invention relates to a spliced display wall OSD display method and device. The method comprises the steps that an OSD display area and OSD image signals obtained by splicing OSD bitmap data are obtained; the OSD image signals are divided into the first OSD image signal and the second OSD image signal which are the same and the first OSD image signal is output to a next-level spliced screen; an OSD display block needing to be displayed in the spliced screen is extracted from the second OSD image signal according to the OSD display area, and the OSD display block is amplified according to the preset multiple and displayed. The OSD can be displayed in the assigned area in the spliced display wall, the OSD which can only be displayed in a single display screen originally can be amplified and displayed on the spliced display wall, a user can use the OSD to adjust the spliced display wall in the distance, and finally the operating efficiency of the OSD is improved.

Description

Spliced display wall OSD display packing and system
[technical field]
The present invention relates to combination Graphics Processing field, particularly relate to a kind of spliced display wall OSD display packing and system.
[background technology]
Conveniently user arranges and inquires about various parameter, current spliced display wall has substantially all possessed OSD (OnScreen Display, screen menu type regulative mode) function, user is by the OSD on remote controller operation combination, thus the control realized combination unit, as regulated the brightness, contrast, tone, colour temperature etc. of joined screen display unit.
Current spliced display wall field, OSD is normally presented in a mosaic screen in spliced display wall.Because spliced display wall is all generally the scene being used in remote viewing and operation, single mosaic screen display OSD easily causes user cannot see the content shown by mosaic screen at a distance clearly.Thus cause closely correctly must to regulate spliced display wall when using OSD adjustment spliced display wall, or need many people compounding practice could correctly regulate spliced display wall, cause the inefficient operation of OSD.
[summary of the invention]
Based on this, be necessary the problem for OSD inefficient operation in prior art, a kind of spliced display wall OSD display packing is provided.
A kind of spliced display wall OSD display packing, comprises step:
Obtain OSD viewing area and spliced the OSD picture signal generated by OSD data bitmap;
Described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen;
From described 2nd OSD picture signal, extract the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area, show after described OSD displaying block is amplified according to preset multiple.
Correspondingly, the present invention also provides a kind of spliced display wall OSD display unit, comprising:
Vision signal acquisition module, for obtaining OSD viewing area and being spliced the OSD picture signal generated by OSD data bitmap;
Distribution module, for described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and outputs to subordinate's mosaic screen by an OSD picture signal;
Extracting display module, for extracting the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area from described 2nd OSD picture signal, showing after described OSD displaying block is amplified according to preset multiple.
After this mosaic screen of the present invention obtains or receives and splices generation OSD picture signal and OSD viewing area by OSD data bitmap, described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen, then extract from described 2nd OSD picture signal after then OSD displaying block amplifies by the OSD displaying block shown needed for this mosaic screen according to OSD viewing area and show.Therefore, each mosaic screen all extracts the OSD displaying block display after being amplified by OSD displaying block that show needed for this mosaic screen according to the position of this mosaic screen in combination, the appointed area be presented at by OSD in spliced display wall can be realized, achieve the OSD that originally can only be presented at single mosaic screen and can amplify display at spliced display wall, thus enable user use OSD to regulate spliced display wall at a distance, finally make the operating efficiency of OSD improve.
[accompanying drawing explanation]
Fig. 1 is the flow chart of a kind of embodiment of spliced display wall OSD display packing of the present invention;
Fig. 2 is the OSD display position schematic diagram of a kind of embodiment of spliced display wall OSD display packing of the present invention;
Fig. 3 is the structured flowchart of a kind of embodiment of spliced display wall OSD display unit of the present invention.
[embodiment]
In order to make the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
Refer to Fig. 1, it is the flow chart of a kind of embodiment of spliced display wall OSD display packing of the present invention.
A kind of spliced display wall OSD display packing, comprises step:
S101: obtain OSD viewing area and spliced the OSD picture signal generated by OSD data bitmap;
In spliced display wall, set a main mosaic screen, all the other mosaic screens are set as from mosaic screen.For main mosaic screen, OSD data bitmap can be obtained then splice generation OSD picture signal from Flash (flash memory) memory.For from mosaic screen, the OSD picture signal sent by upper level mosaic screen directly can be received.Wherein, upper level mosaic screen can be main mosaic screen also can be from mosaic screen.The indication range of wherein said OSD picture signal is in the indication range of single mosaic screen.
S102: described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen;
Be two by OSD picture signal portion, be namely divided into an identical OSD picture signal and the 2nd OSD picture signal.Wherein an OSD picture signal is used for outputting to subordinate's mosaic screen, and the 2nd OSD picture signal is then stayed in this mosaic screen and carried out extraction amplification display.
S103: extract the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area from described 2nd OSD picture signal, shows after being amplified by described OSD displaying block according to preset multiple.
As shown in Figure 2, suppose that rectangle OPQR is the viewing area of OSD, for mosaic screen A, the OSD displaying block of its required display is the region in the OPQR upper left corner, the region that namely mosaic screen A is overlapping with rectangle OPQR.
Can by calculating the overlapping region of this mosaic screen and OSD viewing area, then described overlapping region can be extracted in the 2nd OSD picture signal, also can shear beyond described overlapping region region, the OSD displaying block of the required display of most after-cost mosaic screen.
Amplified according to preset multiple by described OSD displaying block, wherein said preset ratio is the inverse that single mosaic screen accounts for the ratio of spliced display wall.For Fig. 2, suppose that the ratio that mosaic screen A accounts for spliced display wall is 25%, then for combination A, described preset ratio is the inverse of 25%, namely 4 times.After being amplified by described OSD displaying block, can directly show OSD displaying block, show after also described OSD displaying block can being superposed with the video signal mixture of other video source of input.
Indication range due to OSD picture signal is in the indication range of single mosaic screen, and the indication range of the 2nd OSD picture signal be therefore divided into by OSD picture signal is also the indication range of single mosaic screen.Described OSD displaying block is amplified according to preset multiple, the amplification of OSD could be realized to show.
The present invention obtains or receives at mosaic screen after by OSD data bitmap splicing generation OSD picture signal and OSD viewing area, described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen, then extract from described 2nd OSD picture signal after then OSD displaying block amplifies by the OSD displaying block shown needed for this mosaic screen according to OSD viewing area and show.Therefore, each mosaic screen all extracts the OSD displaying block display after being amplified by OSD displaying block that show needed for this mosaic screen according to the position of this mosaic screen in combination, the appointed area be presented at by OSD in spliced display wall can be realized, achieve the OSD that originally can only be presented at single mosaic screen and can amplify display at spliced display wall, finally make the operating efficiency of OSD improve.
In one embodiment, for main mosaic screen, above-mentioned steps S101 can comprise following sub-step.
S201: extract OSD data bitmap, and obtain OSD viewing area, wherein, described indication range information comprises OSD reference origin, OSD shows length and OSD display width;
Directly can extract OSD bitmap from Flash, preferably, can comprise the following steps:
S2011: read OSD metadata from memory;
Preferably, described memory is flash storage.Flash storage has the fast feature of reading, can reduce the reading time of OSD metadata.
S2012: if the storage class of described OSD metadata is not data bitmap form, then generate OSD data bitmap according to the storage class of OSD metadata by corresponding Decoding model.
If the storage class of described OSD metadata is data bitmap form, then can judge that described OSD metadata is as OSD data bitmap.If the storage class of described OSD metadata is not data bitmap form, such as, be character type data, then utilize the Decoding model decoding corresponding with this storage class to generate OSD data bitmap.Such as, when OSD metadata is character type data, then made an explanation by the binary digit of Decoding model to OSD metadata, generate corresponding OSD data bitmap.
S202: the displaing coordinate calculating each OSD data bitmap according to OSD reference origin, OSD display length and OSD display width, and according to described displaing coordinate, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate line by line or column by column;
Piece together order according to OSD data bitmap, with the coordinate of OSD reference origin for benchmark, show length and OSD display width according to OSD, by the coordinate computation model preset, calculate the displaing coordinate of each OSD data bitmap.
Then according to described displaing coordinate, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate line by line or column by column.Such as, in the mode of filling line by line, first fill the OSD data bitmap of the first row first row, then fill the OSD data bitmap of the first row secondary series, after treating that the OSD data bitmap of the first row is filled, fill the OSD data bitmap of the second row, the like.And in mode by column, then first fill out the OSD bitmap of first row, then fill the data bitmap of secondary series, the like.Wherein, region of memory is preferably DDR (Double Data Rate, Double Data Rate synchronous DRAM) memory address.
S203: read described OSD data bitmap from internal memory, and described OSD data bitmap splicing is generated OSD picture signal.
According to order during OSD data bitmap write memory, from internal memory, read described OSD data bitmap.Show the display width of length and OSD according to OSD, described OSD data bitmap splicing is generated OSD picture signal.
Main mosaic screen is by extracting OSD data bitmap, then the displaing coordinate of each OSD data bitmap is calculated according to OSD viewing area, then described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate, finally from internal memory, read described OSD data bitmap, and described OSD data bitmap splicing is generated OSD picture signal.Ensure that OSD picture signal can correctly be spliced into OSD picture signal, thus guarantee correctly to show OSD in spliced display wall.
In one embodiment, in above-mentioned steps S103, the viewing area according to described OSD picture signal extracts the step of the OSD displaying block shown needed for this mosaic screen from described 2nd OSD picture signal, can comprise following sub-step:
S301: obtain the displaing coordinate scope of this mosaic screen relative to spliced display wall, and calculate the overlapping region of described displaing coordinate scope and described OSD viewing area;
Due to the part that mosaic screen is spliced display wall, first obtain the displaing coordinate scope of this mosaic screen relative to spliced display wall.
Then to judge in OSD viewing area that the region of coordinate figure among described displaing coordinate scope is as overlapping region.
As shown in Figure 2, for mosaic screen A, what suppose mosaic screen A is 0≤X≤100 relative to the displaing coordinate scope of spliced display wall, and 0≤Y≤100, wherein, X is row-coordinate, and Y is row coordinate.The part that in the OPQR of OSD viewing area, coordinate figure row-coordinate and row coordinate are less than or equal to 100 is the overlapping region of OSD viewing area OPQR and mosaic screen A displaing coordinate scope.
S302: extract described overlapping region from described second osd signal, generates OSD displaying block.
According to the coordinate of described overlapping region, directly can extract described overlapping region from described second osd signal, also can shear the region beyond described overlapping region in the second osd signal, make only to be left described overlapping region in the second osd signal, to generate the OSD displaying block of this mosaic screen.
By calculating the displaing coordinate scope of this mosaic screen relative to spliced display wall and the overlapping region of described OSD viewing area, then from described second osd signal, the OSD displaying block that described overlapping region generates this mosaic screen is extracted, can ensure that the second osd signal can be correctly divided, thus guarantee correctly to show OSD in spliced display wall.
Refer to Fig. 3, it is the structured flowchart of a kind of embodiment of spliced display wall OSD display unit of the present invention.
A kind of spliced display wall OSD display unit, comprising:
Vision signal acquisition module 301, for obtaining OSD viewing area and being spliced the OSD picture signal generated by OSD data bitmap;
In spliced display wall, set a main mosaic screen, all the other mosaic screens are set as from mosaic screen.For main mosaic screen, vision signal acquisition module 301 can obtain OSD data bitmap and then splice generation OSD picture signal from Flash (flash memory) memory.For from mosaic screen, vision signal acquisition module 301 directly can receive the OSD picture signal sent by upper level mosaic screen.Wherein, upper level mosaic screen can be main mosaic screen also can be from mosaic screen.The indication range of wherein said OSD picture signal is in the indication range of single mosaic screen.
Distribution module 302, for described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and outputs to subordinate's mosaic screen by an OSD picture signal;
OSD picture signal portion is two by distribution module 302, is namely divided into an identical OSD picture signal and the 2nd OSD picture signal.Wherein an OSD picture signal is used for outputting to subordinate's mosaic screen, and the 2nd OSD picture signal is then stayed in this mosaic screen and carried out extraction amplification display.
Extracting display module 303, for extracting the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area from described 2nd OSD picture signal, showing after described OSD displaying block is amplified according to preset multiple.
As shown in Figure 2, suppose that rectangle OPQR is the viewing area of OSD, for mosaic screen A, the OSD displaying block of its required display is the region in the OPQR upper left corner, the region that namely mosaic screen A is overlapping with rectangle OPQR.
Extracting display module 303 can by calculating the overlapping region of this mosaic screen and OSD viewing area, then extract display module 303 and can extract described overlapping region in the 2nd OSD picture signal, also can shear beyond described overlapping region region, the OSD displaying block of the required display of most after-cost mosaic screen.
Extract display module 303 to be amplified according to preset multiple by described OSD displaying block, wherein said preset ratio is the inverse that single mosaic screen accounts for the ratio of spliced display wall.For Fig. 2, suppose that the ratio that mosaic screen A accounts for spliced display wall is 25%, then for combination A, described preset ratio is the inverse of 25%, namely 4 times.After being amplified by described OSD displaying block, extracting display module 303 can directly show OSD displaying block, shows after also described OSD displaying block can being superposed with the video signal mixture of other video source of input.
Indication range due to OSD picture signal is in the indication range of single mosaic screen, and the indication range of the 2nd OSD picture signal be therefore divided into by OSD picture signal is also the indication range of single mosaic screen.Extract display module 303 described OSD displaying block is amplified according to preset multiple, the amplification of OSD could be realized to show.
The present invention obtains or receive at mosaic screen by vision signal acquisition module 301 after by OSD data bitmap splicing generation OSD picture signal and OSD viewing area, by distribution module 302, described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen, finally extraction display module 303 extracts after then OSD displaying block amplifies by the OSD displaying block shown needed for this mosaic screen according to OSD viewing area and shows from described 2nd OSD picture signal.Therefore, each mosaic screen all extracts by extracting display module 303 the OSD displaying block display after being amplified by OSD displaying block that show needed for this mosaic screen according to the position of this mosaic screen in combination, the appointed area be presented at by OSD in spliced display wall can be realized, achieve the OSD that originally can only be presented at single mosaic screen and can amplify display at spliced display wall, thus enable user use OSD to regulate spliced display wall at a distance, finally make the operating efficiency of OSD improve.
In one embodiment, for main mosaic screen, described vision signal acquisition module 301 can comprise bitmap extraction module, packing module and concatenation module.Wherein,
Bitmap extraction module, for extracting OSD data bitmap, and obtains OSD viewing area, and wherein said indication range information comprises OSD reference origin, OSD shows length and OSD display width;
Bitmap extraction module can read OSD bitmap from common memory, and preferably, bitmap extraction module directly extracts OSD bitmap from flash storage, and preferably, bitmap extraction module can comprise following read module and decoding module.Wherein,
Described read module, for reading OSD metadata from memory;
Read module, by SPI (Serial Peripheral Interface, Serial Peripheral Interface (SPI)) bus, directly reads OSD metadata from memory.Preferably, described memory is flash storage.Flash storage has the fast feature of reading, can reduce the reading time of OSD metadata, the final time reduced needed for OSD display.
Described decoding module, for when the storage class of described OSD metadata is not data bitmap form, the storage class according to OSD metadata generates OSD data bitmap by corresponding Decoding model.
If the storage class of described OSD metadata is data bitmap form, then can judge that described OSD metadata is as OSD data bitmap.If the storage class of described OSD metadata is not data bitmap form, such as, be character type data, then decoding module utilizes the Decoding model decoding corresponding with this storage class to generate OSD data bitmap.Such as, when OSD metadata is character type data, then decoding module is made an explanation by the binary digit of Decoding model to OSD metadata, generates corresponding OSD data bitmap.
Packing module, for calculating the displaing coordinate of each OSD data bitmap according to OSD reference origin, OSD display length and OSD display width, and according to described displaing coordinate, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate line by line or column by column;
Packing module pieces together order according to OSD data bitmap, with the coordinate of OSD reference origin for benchmark, shows length and OSD display width according to OSD, is calculated the displaing coordinate of each OSD data bitmap by the coordinate computation model preset.
Then packing module is according to described displaing coordinate, and described OSD data bitmap progressively or column by column is filled into the region of memory corresponding with described displaing coordinate.Such as, in the mode of filling line by line, packing module first fills the OSD data bitmap of the first row first row, then the OSD data bitmap of the first row secondary series is filled, after treating that the OSD data bitmap of the first row is filled, packing module fills the OSD data bitmap of the second row, the like.And in mode by column, packing module then first fills out the OSD bitmap of first row, then fills the data bitmap of secondary series, the like.Wherein, region of memory is preferably DDR (Double DataRate, Double Data Rate synchronous DRAM) memory address.
Concatenation module, for reading described OSD data bitmap from internal memory, and generates OSD picture signal by described OSD data bitmap splicing.
Concatenation module, according to order during OSD data bitmap write memory, reads described OSD data bitmap from internal memory.Show the display width of length and OSD according to OSD, described OSD data bitmap splicing is generated OSD picture signal by concatenation module.
Main mosaic screen extracts OSD data bitmap by bitmap extraction module, then the displaing coordinate of each OSD data bitmap is calculated according to OSD viewing area, then by packing module, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate, from internal memory, read described OSD data bitmap finally by concatenation module, and described OSD data bitmap splicing is generated OSD picture signal.Ensure that OSD picture signal can correctly be spliced into OSD picture signal, thus guarantee correctly to show OSD in spliced display wall.
In one embodiment, said extracted display module, can comprise following submodule:
Overlapping calculation module, for obtaining the displaing coordinate scope of this mosaic screen relative to spliced display wall, and calculates the overlapping region of described displaing coordinate scope and described OSD viewing area;
Due to the part that mosaic screen is spliced display wall, first overlapping calculation module obtains the displaing coordinate scope of this mosaic screen relative to spliced display wall.
Then overlapping calculation module to judge in OSD viewing area that the region of coordinate figure among described displaing coordinate scope is as overlapping region.
As shown in Figure 2, for mosaic screen A, what suppose mosaic screen A is 0≤X≤100 relative to the displaing coordinate scope of spliced display wall, and 0≤Y≤100, wherein, X is row-coordinate, and Y is row coordinate.Overlapping calculation module can judge that part that coordinate figure row-coordinate and row coordinate in the OPQR of OSD viewing area are less than or equal to 100 is the overlapping region of OSD viewing area OPQR and mosaic screen A displaing coordinate scope.
Extraction module, for extracting described overlapping region from described second osd signal, generates OSD displaying block.
According to the coordinate of described overlapping region, extraction module directly can extract described overlapping region from described second osd signal, also the region beyond described overlapping region can be sheared in the second osd signal, make only to be left described overlapping region in the second osd signal, to generate the OSD displaying block of this mosaic screen.
The displaing coordinate scope of this mosaic screen relative to spliced display wall and the overlapping region of described OSD viewing area is calculated by overlapping calculation module, then from described second osd signal, extract by extraction module the OSD displaying block that described overlapping region generates this mosaic screen, can ensure that the second osd signal can be correctly divided, thus guarantee correctly to show OSD in spliced display wall.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.

Claims (8)

1. a spliced display wall OSD display packing, is characterized in that, comprises step:
Obtain OSD viewing area and spliced the OSD picture signal generated by OSD data bitmap;
Described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and an OSD picture signal is outputted to subordinate's mosaic screen;
From described 2nd OSD picture signal, extract the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area, show after described OSD displaying block is amplified according to preset multiple.
2. spliced display wall OSD display packing according to claim 1, is characterized in that, obtains OSD viewing area and is spliced the step of the OSD picture signal generated by OSD data bitmap, specifically comprise:
Extract OSD data bitmap, and obtain OSD viewing area, wherein said OSD viewing area comprises OSD origin, OSD shows length and OSD display width;
Calculate the displaing coordinate of each OSD data bitmap according to OSD origin, OSD display length and OSD display width, and according to described displaing coordinate, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate line by line or column by column;
From internal memory, read described OSD data bitmap, and described OSD data bitmap splicing is generated OSD picture signal.
3. spliced display wall OSD display packing according to claim 2, is characterized in that, the step of described extraction OSD bitmap, comprises sub-step:
OSD metadata is read from memory;
If the storage class of described OSD metadata is not data bitmap form, then generate OSD data bitmap according to the storage class of OSD metadata by corresponding Decoding model.
4. spliced display wall OSD display packing according to claim 1, is characterized in that, the viewing area according to described OSD picture signal extracts the step of the OSD displaying block shown needed for this mosaic screen from described 2nd OSD picture signal, comprising:
Obtain the displaing coordinate scope of this mosaic screen relative to spliced display wall, and calculate the overlapping region of described displaing coordinate scope and described OSD viewing area;
From described second osd signal, extract described overlapping region, generate OSD displaying block.
5. a spliced display wall OSD display unit, is characterized in that, comprising:
Vision signal acquisition module, for obtaining OSD viewing area and being spliced the OSD picture signal generated by OSD data bitmap;
Distribution module, for described OSD picture signal is divided into an identical OSD picture signal and the 2nd OSD picture signal, and outputs to subordinate's mosaic screen by an OSD picture signal;
Extracting display module, for extracting the OSD displaying block shown needed for this mosaic screen according to described OSD viewing area from described 2nd OSD picture signal, showing after described OSD displaying block is amplified according to preset multiple.
6. spliced display wall OSD display unit according to claim 5, is characterized in that, described vision signal acquisition module comprises:
Bitmap extraction module, for extracting OSD data bitmap, and obtains OSD viewing area, and wherein said indication range information comprises OSD reference origin, OSD shows length and OSD display width;
Packing module, for calculating the displaing coordinate of each OSD data bitmap according to OSD reference origin, OSD display length and OSD display width, and according to described displaing coordinate, described OSD data bitmap is filled into the region of memory corresponding with described displaing coordinate line by line or column by column;
Concatenation module, for reading described OSD data bitmap from internal memory, and generates OSD picture signal by described OSD data bitmap splicing.
7. spliced display wall OSD display unit according to claim 6, it is characterized in that, bitmap extraction module comprises:
Read module, for reading OSD metadata from memory;
Decoding module, for when the storage class of described OSD metadata is not data bitmap form, the storage class according to OSD metadata generates OSD data bitmap by corresponding Decoding model.
8. spliced display wall OSD display unit according to claim 5, is characterized in that, described extraction display module comprises:
Overlapping calculation module, for obtaining the displaing coordinate scope of this mosaic screen relative to spliced display wall, and calculates the overlapping region of described displaing coordinate scope and described OSD viewing area;
Extraction module, for extracting described overlapping region from described second osd signal, generates OSD displaying block.
CN201410831664.2A 2014-12-26 2014-12-26 Spliced display wall OSD display methods and system Expired - Fee Related CN104469212B (en)

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