CN105227866A - A kind of multi-channel video display packing and device - Google Patents
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Abstract
Embodiments provide a kind of multi-channel video display packing and device, method wherein comprises: obtain the video source data that a line reads in advance; After picture mosaic process is carried out to described a line video source data, the video source data after picture mosaic process is exported to the target line position of display frequency curtain.The embodiment of the present invention achieves the display of multi-channel video data, significantly can save system bandwidth.
Description
Technical Field
The invention relates to the technical field of electronic equipment control, in particular to a multi-channel video display method and device.
Background
With the development of video hardware equipment, the requirements of a video multichannel technology are more and more large, the specific requirements are more and more diversified, and the mainstream video multichannel technology in the market at present has the following two types:
1) each channel requires the same frame rate, so that the tiles must be completed by a special tile engine, and then the tiles are unified to the display engine after completion.
2) Each channel can have different frame rates, the video data of each channel needs to be subjected to jigsaw puzzle by using the puzzle engine according to the fastest frame rate, and in the process of jigsaw puzzle, aiming at the channel with the slower frame rate, when the puzzle engine finishes one time of jigsaw puzzle and carries out next or even next jigsaw puzzle, aiming at the channel, the video data of the previous frame still needs to be copied and the video data on other channels can be displayed after the jigsaw puzzle is carried out.
In both of the above two methods, after the video data of each channel needs to be subjected to overall splicing, the video data after splicing is output, which directly results in waste of system bandwidth.
Disclosure of Invention
In order to solve the existing technical problems, embodiments of the present invention are expected to provide a method and an apparatus for displaying a multi-channel video.
The embodiment of the invention provides a multi-channel video display method, which comprises the following steps:
acquiring a line of pre-read video source data;
and after the one line of video source data is subjected to picture splicing processing, outputting the video source data subjected to picture splicing processing to a target line position of the display screen.
Preferably, before acquiring a line of pre-read video source data, the method further comprises:
reading one or more lines of video source data in advance, and storing the video source data in a video cache region; wherein each line of video source data consists of video data on a plurality of channels.
Preferably, one line of video source data is read in advance by:
and sequentially reading the video data on a plurality of channels corresponding to the line of video source data.
Preferably, the video data of a plurality of channels corresponding to one line of video source data is read by:
sequentially reading the configuration information of the updated video data on the corresponding channels from the video data registers corresponding to the channels;
acquiring position information in the video data configuration information;
and acquiring video data from the position corresponding to the acquired position information and storing the video data in a video cache region.
Preferably, the configuration information of the video data includes: location information of video data and size of video data.
Preferably, the performing mosaic processing on the line of video source data includes:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels;
when the size of the video data on the channels constituting the line of video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
Preferably, the outputting the video source data after the tile splicing processing to the target row position of the display screen includes:
and respectively outputting the video data on the plurality of channels after the picture splicing processing to the display position of each channel.
An embodiment of the present invention provides a multi-channel video display device, including: the system comprises a video source data acquisition module, a picture splicing module and an output module; wherein,
the video source data acquisition module is used for acquiring a line of video source data read in advance;
the picture splicing module is used for carrying out picture splicing processing on the line of video source data;
and the output module is used for outputting the video source data after the jigsaw processing to the target row position of the display screen.
Preferably, the apparatus further comprises: the device comprises a video source data pre-reading module and a storage operation module; wherein,
the video source data pre-reading module is used for pre-reading one or more lines of video source data before acquiring one line of pre-read video source data; wherein each line of video source data consists of video data on a plurality of channels;
and the storage operation module is used for storing one or more lines of video source data read in advance in the video buffer area.
Preferably, the video source data pre-reading module is configured to pre-read a line of video source data by:
and sequentially reading the video data on a plurality of channels corresponding to the line of video source data.
Preferably, the video source data pre-reading module includes: a configuration information reading submodule, a position information obtaining submodule and a video data obtaining submodule; wherein,
the configuration information reading submodule is used for sequentially reading the configuration information of the updated video data on the corresponding channel from the video data registers corresponding to the channels;
the position information acquisition submodule is used for acquiring position information in the video data configuration information;
and the video data acquisition submodule is used for acquiring video data from the position corresponding to the acquired position information and storing the video data in a video cache region.
Preferably, the configuration information of the video data includes: location information of video data and size of video data.
Preferably, the tile module is configured to perform tile processing on the line of video source data by:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels;
when the size of video data on channels constituting the video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
Preferably, the output module is configured to output the video source data after the mosaic processing to a target row position of the display screen by:
and respectively outputting the video data on the plurality of channels after the picture splicing processing to the display position of each channel.
Compared with the prior art, the embodiment of the invention has the following advantages:
the embodiment of the invention provides a multi-channel video display method and a device, which are used for acquiring a line of pre-read video source data; and after the one line of video source data is subjected to picture splicing processing, outputting the video source data subjected to picture splicing processing to a target line position of the display screen. Therefore, according to the multi-channel video display method provided by the embodiment of the invention, the video source data can be subjected to mosaic processing in a row unit, and the video source data subjected to mosaic processing is output to the target row position of the display screen, so that each row of video source data is subjected to mosaic processing, namely, the data is output to the target row position of the display screen in real time.
Drawings
Fig. 1 is a flowchart of a multi-channel video display method according to an embodiment of the present invention;
FIG. 2 is a flowchart of a multi-channel video display method according to an embodiment of the present invention;
FIG. 3 is a diagram illustrating a basic structure of a multi-channel video display apparatus according to an embodiment of the present invention;
fig. 4 is a basic structure diagram of a video source data pre-reading module according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a nine-channel video data display screen according to an embodiment of the present invention.
Detailed Description
Example one
Referring to fig. 1, a flowchart illustrating a first step of a multi-channel video display method according to a first embodiment of the present invention is shown, which may specifically include:
step 101, acquiring a line of video source data read in advance;
specifically, in this step, the video display device, specifically, a display engine in the video display device, acquires a line of video data read in advance from the video data buffer area; the line of pre-read video data as referred to herein may be used to refresh a line of pictures on a display screen, in particular a display screen of a display.
102, after the one line of video source data is subjected to picture splicing processing, outputting the video source data subjected to picture splicing processing to a target line position of a display screen;
specifically, the video display device performs picture splicing processing on the video source data, so that the video data is matched with a display area in a display screen, the video source data can achieve a good display effect, and then the video source data after picture splicing processing is output to a target line position of a display screen. And when the target line position of the display screen divides the display area of the display screen according to the lines, the target source data is output to the target position, and the position corresponds to a specific line in the display area of the display screen.
In summary, according to the multi-channel video display method provided by the embodiment of the present invention, the video source data can be processed by the line unit for picture splicing, and the video source data after the picture splicing processing is output to the target line position of the display screen, so that each time a line of video source data is completed, that is, the video source data is output to the target line position of the display screen in real time.
Example two
Referring to fig. 2, a flowchart illustrating steps of an embodiment of a multi-channel video display method according to the present invention is shown, which may specifically include:
step 201, sequentially reading video data on a plurality of channels corresponding to a line of pre-read video source data;
specifically, before step 201, the method further includes the following steps:
reading one or more lines of video source data in advance, and storing the video source data in a video cache region; wherein each line of video source data consists of video data on a plurality of channels. Specifically, the video buffer may be a first-in first-out (FIFO) queue.
Specifically, the video data of multiple channels corresponding to one line of video source data is read in the following manner:
sequentially reading the configuration information of the updated video data on the corresponding channels from the video data registers corresponding to the channels;
acquiring position information in the video data configuration information;
and acquiring video data from the position corresponding to the acquired position information and storing the video data in a video cache region.
Specifically, the configuration information of the video data includes: position information of the video data and a size of the video data; further, the configuration information of the video data further includes: format, frame rate, etc. of the video data.
Step 202, after the one line of video source data is subjected to picture splicing processing, outputting the video data on the plurality of channels after picture splicing processing to the display positions of each channel respectively;
specifically, the performing the mosaic processing on the line of video source data includes:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels; a typical application scenario for the overlay display of video data is picture-in-picture, such that an exemplary picture-in-picture display effect is assumed to be that a small picture is overlaid on a large picture, such that in one scheme, the overlay order of two pictures can be determined according to a preset priority, and obviously, the small picture needs to be overlaid on the large picture; in another scheme, an alpha effect may be set for the two pictures, that is, the two pictures are set to be in a semi-transparent display state, and the two pictures can be seen clearly after being stacked.
When the size of the video data on the channels constituting the line of video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
Further, the performing the mosaic processing on the line of video source data further includes: when there is a gap between the video data on two adjacent channels constituting the line of video source data, some special data colors and effects may be filled so that the display pictures thereof are continuous.
In another embodiment of the present invention, the performing the mosaic processing on the line of video source data may be stitching the line of video source data, and then directly adjusting the size of the stitched video source data according to the size of the display position (i.e., the target line position) of the line of video source data.
And after the jigsaw processing is finished, the video data on the plurality of channels after the jigsaw is respectively output to the display position of each channel.
It can be seen that, by using the multi-channel video display method provided by the second embodiment of the present invention, the video source data can be processed by the line unit to form a mosaic, and the video data in the channels corresponding to the video source data after the mosaic processing is output to the display positions corresponding to the channels, respectively, so that each line of the video source data is processed by the mosaic, that is, output to the display position of the display screen in real time.
Device embodiment
Referring to fig. 3, there is shown a block diagram of a multi-channel video display apparatus according to an embodiment of the present invention, the apparatus being located on a video display device, the apparatus comprising: a video source data acquisition module 31, a jigsaw module 32 and an output module 33; wherein,
the video source data acquiring module 31 is configured to acquire a line of video source data read in advance;
the picture mosaic module 32 is configured to perform picture mosaic processing on the line of video source data;
the output module 33 is configured to output the video source data after the mosaic processing to a target row position of the display screen.
In an optional embodiment of the invention, the apparatus further comprises: a video source data pre-reading module 34 and a storage operation module 35; wherein,
the video source data pre-reading module 34 is configured to pre-read one or more lines of video source data before acquiring one line of pre-read video source data; wherein each line of video source data consists of video data on a plurality of channels;
the storage operation module 35 is configured to store one or more lines of video source data read in advance in the video buffer.
Specifically, the video source data pre-reading module 34 is configured to pre-read a line of video source data by:
and sequentially reading the video data on a plurality of channels corresponding to the line of video source data.
Specifically, as shown in fig. 4, the video source data pre-reading module 34 includes: a configuration information reading sub-module 3401, a position information acquisition sub-module 3402, and a video data acquisition sub-module 3403; wherein,
the configuration information reading submodule 3401 is configured to read configuration information of updated video data on a corresponding channel from video data registers corresponding to multiple channels in sequence;
the position information obtaining sub-module 3402 is configured to obtain position information in the video data configuration information;
and the video data obtaining sub-module 3403 is configured to obtain video data from a position corresponding to the obtained position information and store the video data in a video cache region.
Specifically, the configuration information of the video data includes: location information of video data and size of video data.
Specifically, the tile module 32 is configured to perform tile processing on the line of video source data in the following manner:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels;
when the size of the video data on the channels constituting the line of video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
Specifically, the output module 33 is configured to output the video source data after the mosaic processing to the target row position of the display screen in the following manner:
and respectively outputting the video data on the plurality of channels after the picture splicing processing to the display position of each channel.
In a specific implementation process, the video source data obtaining module 31, the tile splicing module 32, the output module 33, the video source data pre-reading module 34, the storage operation module 35, the configuration information reading sub-module 3401, the location information obtaining sub-module 3402, and the video data obtaining sub-module 3403 may be implemented by a Central Processing Unit (CPU), a microprocessor unit (MPU), a Digital Signal Processor (DSP), or a programmable logic array (FPGA) in the video display device.
Application example
The following describes the multi-channel video display method provided by the embodiment of the invention in detail by using a specific example.
As shown in fig. 5, the display screen is a nine-channel video data display screen, the display screen is divided into nine display areas, each display area corresponds to one channel, the display screen is divided into three rows from top to bottom, specifically, the first row includes channels 1 to 3, the second row includes channels 4 to 6, and the third row includes channels 7 to 9, and the display screen performs video data refresh in units of rows from top to bottom.
Each channel in fig. 5 is configured with two video data registers, one ping and the other pang, which are ping-pong registers, as will be apparent. Both registers are implemented as FIFO queues.
When one of the two registers is used for storing the configuration information of the video source data, the other register is used for reading the configuration information of the video source data, and the two video data registers are used for performing ping-pong processing, so that the continuous processing of the video source data can be realized. For example, assuming that a channel is configured with two registers, one is a and the other is B, when storing video source data X in the register of the channel, first storing configuration information of a first frame of X in a, then storing configuration information of a second frame in B, and storing a third frame in a, so as to store in turn; when the configuration information of the second frame is stored, the configuration information of the first frame can be read from the A, and then the configuration information of the second frame can be read from the B after the B stores the configuration information of the second frame, so that a ping-pong mechanism is formed.
When a display engine of the video display device needs to acquire one frame of video data of a first channel, configuration information of prepared video data at the forefront of two FIFO queues for realizing a video data register in the channel is firstly read, the configuration information of one frame of video data is stored in the FIFO queues each time, and the configuration information comprises storage position information of the video data, so that the display engine can directly acquire the video data from a storage position indicated by the storage position information and store the video data in a video buffer area.
As also shown in fig. 5, it is assumed that three lines of video source data are read in advance by the display engine of the video display device, that is, the display engine has read three lines of video source data from nine channels respectively; when the display engine needs to refresh the video picture of the first row, processing is carried out according to the following steps:
step 1, acquiring first line video source data;
specifically, the display engine acquires pre-stored first line video source data from the video buffer, where the first line video source data includes video data of channels 1 to 3.
Step 2, performing picture splicing on the video source data;
specifically, the display engine determines the sizes of the video data in the channels 1 to 3, respectively, determines the display sizes of the channels 1 to 3, and adjusts the sizes of the video data in the channels to the display sizes of the channels when the sizes of the video data in the corresponding channels do not match the display sizes of the corresponding channels (i.e., the sizes of the video data on the channels are not equal to the display sizes of the channels).
Assuming that there is a gap between the video data in channel 1 and channel 2, a special color is filled between channel 1 and channel 2, making the pictures of channel 1 and channel 2 continuous.
And 3, outputting the video data on the plurality of channels after picture splicing to the target line position of the display screen.
Specifically, in this example, the target line position of the display screen corresponding to the first line of video source data is an area in the first line of the display screen; this area consists of the display area of channel 1, channel 2 and channel 3.
Specifically, the data in lane 1 after the mosaic is output to the display area of lane 1, the data in lane 2 after the mosaic is output to the display area of lane 1, and the data in lane 1 after the mosaic is output to the display area of lane 3.
Correspondingly, when the display engine needs to refresh the video picture of the second row or the third row, the display engine only needs to process the video picture according to a method similar to the method for refreshing the video picture of the first row.
For the device embodiment, since it is basically similar to the method embodiment, the description is simple, and for the relevant points, refer to the partial description of the method embodiment.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, apparatus, or computer program product. Accordingly, embodiments of the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
Embodiments of the present invention are described with reference to flowchart illustrations and/or block diagrams of methods, terminal devices (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing terminal to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing terminal, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing terminal to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing terminal to cause a series of operational steps to be performed on the computer or other programmable terminal to produce a computer implemented process such that the instructions which execute on the computer or other programmable terminal provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The method and the device for displaying multi-channel video provided by the invention are described in detail, and the principle and the implementation mode of the invention are explained by applying specific examples in the text, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (14)
1. A method for multi-channel video display, the method comprising:
acquiring a line of pre-read video source data;
and after the one line of video source data is subjected to picture splicing processing, outputting the video source data subjected to picture splicing processing to a target line position of the display screen.
2. The method of claim 1, wherein prior to retrieving a line of pre-read video source data, the method further comprises:
reading one or more lines of video source data in advance, and storing the video source data in a video cache region; wherein each line of video source data consists of video data on a plurality of channels.
3. The method of claim 2, wherein a line of video source data is pre-read by:
and sequentially reading the video data on a plurality of channels corresponding to the line of video source data.
4. The method of claim 3, wherein the video data of a plurality of channels corresponding to a row of video source data is read by:
sequentially reading the configuration information of the updated video data on the corresponding channels from the video data registers corresponding to the channels;
acquiring position information in the video data configuration information;
and acquiring video data from the position corresponding to the acquired position information and storing the video data in a video cache region.
5. The method of claim 4, wherein the configuration information of the video data comprises: location information of video data and size of video data.
6. The method of claim 1, wherein said tile processing of said line of video source data comprises:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels;
when the size of the video data on the channels constituting the line of video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
7. The method according to any one of claims 1 to 6, wherein outputting the mosaic processed video source data to the target row position of the display screen comprises:
and respectively outputting the video data on the plurality of channels after the picture splicing processing to the display position of each channel.
8. A multi-channel video display apparatus, the apparatus comprising: the system comprises a video source data acquisition module, a picture splicing module and an output module; wherein,
the video source data acquisition module is used for acquiring a line of video source data read in advance;
the picture splicing module is used for carrying out picture splicing processing on the line of video source data;
and the output module is used for outputting the video source data after the jigsaw processing to the target row position of the display screen.
9. The apparatus of claim 8, further comprising: the device comprises a video source data pre-reading module and a storage operation module; wherein,
the video source data pre-reading module is used for pre-reading one or more lines of video source data before acquiring one line of pre-read video source data; wherein each line of video source data consists of video data on a plurality of channels;
and the storage operation module is used for storing one or more lines of video source data read in advance in the video buffer area.
10. The apparatus of claim 9, wherein the video source data pre-reading module is configured to pre-read a line of video source data by:
and sequentially reading the video data on a plurality of channels corresponding to the line of video source data.
11. The apparatus of claim 10, wherein the video source data pre-reading module comprises: a configuration information reading submodule, a position information obtaining submodule and a video data obtaining submodule; wherein,
the configuration information reading submodule is used for sequentially reading the configuration information of the updated video data on the corresponding channel from the video data registers corresponding to the channels;
the position information acquisition submodule is used for acquiring position information in the video data configuration information;
and the video data acquisition submodule is used for acquiring video data from the position corresponding to the acquired position information and storing the video data in a video cache region.
12. The apparatus of claim 11, wherein the configuration information of the video data comprises: location information of video data and size of video data.
13. The apparatus of claim 8, wherein the tile module is configured to tile the line of video source data by:
when the video data on two or more channels in the line of video source data are displayed in a stacking mode, determining the stacking sequence of the video data on the two or more channels according to the preset priority; or setting alpha effect on the video data on the two or more channels;
when the size of video data on channels constituting the video source data does not match the display size of the corresponding channel, adjusting the size of the video data to the display size of the corresponding channel.
14. The apparatus according to any one of claims 1 to 13, wherein the output module is configured to output the mosaic processed video source data to the target row position of the display screen by:
and respectively outputting the video data on the plurality of channels after the picture splicing processing to the display position of each channel.
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| CN110262766A (en) * | 2019-06-17 | 2019-09-20 | 合肥市传秀科技有限公司 | A kind of Mosaic screen interaction control method and system |
| CN110519530A (en) * | 2019-06-13 | 2019-11-29 | 眸芯科技（上海）有限公司 | Hardware based picture-in-picture display methods and device |
| CN110719430A (en) * | 2018-07-13 | 2020-01-21 | 杭州海康威视数字技术股份有限公司 | Image data generation method, image data generation device, electronic device, and storage medium |
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