CN108810591A - Switching shows image processing method when different video source - Google Patents
Switching shows image processing method when different video source Download PDFInfo
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- CN108810591A CN108810591A CN201810604496.1A CN201810604496A CN108810591A CN 108810591 A CN108810591 A CN 108810591A CN 201810604496 A CN201810604496 A CN 201810604496A CN 108810591 A CN108810591 A CN 108810591A
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- video source
- vehicle
- task
- entertainment system
- image processing
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Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44004—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving video buffer management, e.g. video decoder buffer or video display buffer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
Abstract
A kind of image processing method in vehicle-mounted information and entertainment system when switching display different video source, including：It is pre-configured the output format that video source contents time frame buffer cell is shown to user；To the video source that need to currently show, the handling the video source of the task is created in the hardware image processor of vehicle-mounted information and entertainment system, the configuration for creating task includes input address for obtaining video source and exports video source with the output format；To need to currently switch the new video source of display, the handling the new video source of the task is created in hardware image processor, the configuration for creating task includes input address for obtaining new video source and with output format output new video source；Processed video source is transmitted to frame buffer cell by hardware image processor when each single item task is completed, to show video source contents to user.The above method leads to the problem of flicker when can show different video source to avoid switching.
Description
Technical field
The present invention relates to image processing techniques, more particularly to the switching display different video source in vehicle-mounted information and entertainment system
When image processing method.
Background technology
Current vehicle-mounted information and entertainment system supports the image of a variety of different-formats to show, such as plays boot animation, shows
Album information etc. is shown when showing reverse image, playing music, this allows driver and passenger to enjoy a variety of different cars
Information service.Known one kind showing different video source in the prior art, when being related to the switching in vehicle-mounted information and entertainment system
When content, frame buffer cell is needed to configure.Specifically, it when video source 1 (it is with video format 1) needs output, needs to match
Frame buffer cell is set, informs the video format that frame buffer cell this time exports, and when video source 2 (it is with video format 2) needs
It when exporting, needs to reconfigure frame buffer cell, informs the video format that frame buffer cell this time exports.Due to being buffered in frame
It needs first to carry out hardware reset when unit is using new configuration, and this can cause to generate flicker when switching display different video source, this
User experience will obviously be reduced.
Invention content
Problems solved by the invention is to provide a kind of switch in vehicle-mounted information and entertainment system when showing different video source
Image processing method, to avoid above-mentioned flicker problem.
To solve the above-mentioned problems, one kind provided by the invention switching in vehicle-mounted information and entertainment system shows different video
Image processing method when source, including：
It is pre-configured the output format that video source contents time frame buffer cell is shown to user；
To the video source that need to currently show, in the hardware image processor of vehicle-mounted information and entertainment system creating processing, this is regarded
The task of frequency source, the configuration for creating task are included input address for obtaining video source and are regarded with output format output
Frequency source；
To need to currently switch the new video source of display, is created in hardware image processor and handle appointing for the new video source
Business, the configuration for creating task include input address for obtaining new video source and export new video with the output format
Source；
Processed video source is transmitted to frame buffer cell by hardware image processor when each single item task is completed, with to
User shows video source contents.
Compared with prior art, said program has the following advantages：Unification when showing from video source contents to user is set
Output format, when switching shows different video source, since frame buffer cell need not be reconfigured, to be buffered without to frame
Unit is resetted, and is avoided when switching shows different video source and is led to the problem of flicker.
Description of the drawings
Fig. 1 is the processing flow schematic diagram of embodiment of the present invention；
Fig. 2 is the realization schematic diagram of an embodiment of the present invention.
Specific implementation mode
In the following description, numerous specific details are set forth to make person of ordinary skill in the field more fully
Understand the present invention.But for the technical staff in technical field it is evident that the realization of the present invention can not have these
Some in detail.However, it should be understood that the specific embodiment that the present invention is not limited to be introduced.On the contrary, can be with
Consider to implement the present invention with the arbitrary combination of following feature and element, regardless of whether they are related to different embodiments.
Therefore, aspect, feature, embodiment and advantage below is used and is not construed as the element or limit of claim for illustrative purposes only
It is fixed, unless clearly proposing in the claims.
As background technology is introduced, due to output show different-format video source when need to frame buffer cell into
Row hardware reset, thus cause to occur the case where flicker.And hardware reset is to meet using the requirement newly configured.Due to existing
There is technology and obtains video source using only frame buffer cell and carry out the processing of display output, thus need to be by reconfiguring every time
To be adapted to the format in different video source.The present inventor proposes, can set the video shown to user to unification
Output format only using frame buffer cell as output stage, and obtains video source and to video using hardware image processor
Source carries out the processing (including possible format conversion) of display output.
Shown in referring to Fig.1, a kind of embodiment according to the present invention specifically includes：
Step s1 is pre-configured the output format that video source contents time frame buffer cell is shown to user；
Step s2 creates the video source that need to currently show in the hardware image processor of vehicle-mounted information and entertainment system
The handling the video source of the task, the configuration for creating task include input address for obtaining video source and with the output lattice
Formula exports video source；
Step s3 is created in hardware image processor to need to currently switch the new video source of display and is handled the new video
The task in source, the configuration for creating task include input address for obtaining new video source and new with output format output
Video source；
Step s4, it is single that processed video source is transmitted to frame buffering by hardware image processor when each single item task is completed
Member, to show video source contents to user.
Such as foregoing description, the output format being pre-configured in frame buffer cell is exactly the unification of the video shown to user
Output format, the output format subsequently through hardware image processor treated video source is also the uniform output format.Then such as
Above description, the task of hardware image processor includes mainly to go to obtain video source according to the input address in task configuration
Data, and after obtaining video source data identify video source format, with start in order to the uniform output format export
The format conversion processing that should be used.It is aobvious that the video source that hardware image processor is transmitted to frame buffer cell as a result, has met output
The call format shown.Therefore, frame buffer cell is reconfigured every time (i.e. without the unprocessed form for adapted video source
Output format configuration in frame buffer cell remains unchanged), it also avoids flickering caused by hardware reset to use new configuration
Problem.
For vehicle-mounted information and entertainment system, generally include host and connect by hardware interface between host including
Multiple peripheral hardwares including display screen and vehicle-mounted camera.Mode more general at present is to assemble host and display screen one
It rises, or is connect host with display screen by harness (such as LVDS lines), and connected by harness between host and vehicle-mounted camera
It connects.Host provides a user corresponding function services by controlling the various functions of vehicle-mounted information and entertainment system by peripheral hardware.
Host generally includes one or more pcb board, is integrated with main application processor thereon and one or more other are answered
Use processor.Related application processor (AP, Application Processor), be in current Embedded System Design most
Frequently with hardware processor, usually by semiconductor designer by certain function demand by CPU and some ports and specific work(
The hardware processor (such as hardware image processor) of energy is encapsulated into a monolithic.Other are integrated on same pcb board as a result,
Other modules, such as cache/memories etc. be commonly referred to as caching/chip external memory outside piece.And it is entertained in on-vehicle information
The application processor of progress core control is exactly above-mentioned main application processor in system, and CPU therein is also referred to as system
CPU.Being applicable to the main application processor of vehicle-mounted information and entertainment system of the present invention at present, there are many selection schemes, such as grace intelligence Pu
The i.MX6 series of company.
Below based on above-mentioned vehicle-mounted information and entertainment system framework and combine Fig. 2 to the present invention image processing method into
One step illustrates.User starts the field of car-backing function in the boot animation playing process of vehicle-mounted information and entertainment system when dispatching a car
For scape, for convenience of description, boot animation is known as video source 1, format common at present can be such as NV12 (YUV4:2:0
Sampling), the video flowing that backup camera is shot is known as video source 2, format common at present can be such as UVYV (YUV4:
2:2 samplings).
It is assumed that it is RGB to configure unified output format in the frame buffer cell exported for display screen video in advance.When
When user dispatches a car, vehicle-mounted information and entertainment system starts.Vehicle-mounted information and entertainment system usually may require that first playing booting moves when starting
It draws, that is, plays the content of video source 1.Then when vehicle-mounted information and entertainment system just starts to start, system CPU can be at hardware image
Manage the task that processing video source 1 is created in device (IPU, Image Processing Unit) (video source handles task 1).Specifically
Ground, system CPU handle task 1 by carrying out following configuration in the register of hardware image processor to create video source：1)
From the data for obtaining video source 1 in address 1 (can be some address of chip external memory)；2) by the format conversion of video source 1
To be transmitted to frame buffer cell (some specified frame buffer cell) after rgb format；3) video source handles task 1 in task queue
In priority position.
The task 1 is committed to task queue by system CPU after creating video source processing task 1.When taking turns to task queue
In video source processing 1 start to process of task when, hardware image processor will be from address 1 by the data copy of video source 1
Come over, then by format conversion processing by the NV12 format conversions of video source 1 be rgb format (required according to specific display,
Other image procossings such as cutting, rotate, parity field merges can also be carried out).After the completion of format conversion, hardware image processing
The video source 1 of rgb format is transmitted to the frame buffer cell specified in configuration by device.System CPU is read from the frame buffer cell
The video source 1 of rgb format simultaneously starts to play boot animation on a display screen.Hardware image processor is by the video source 1 of rgb format
The mode of direct memory access (DMA, Direct Memory Access) may be used in the mode for being transmitted to frame buffer cell,
This mode can reduce the occupancy to cpu resource.
During boot animation plays, user starts reverse image function by gear is switched to reverse gear (P grades),
Backup camera starts to shoot at this time.When reverse image function starts, system CPU can be in hardware image processor at establishment
Manage the task of video source 2 (video source handles task 2).Specifically, system CPU passes through in the register of hardware image processor
It carries out following configuration and handles task 2 to create video source：1) hardware image processor by camera sensing device interface (CSI,
Camera Sensor Interface) obtain video source 2 data；2) by the format conversion of video source 2 be rgb format after pass
Transport to frame buffer cell (frame buffer cell identical with task 1)；3) priority of the video source processing task 2 in task queue
Position.
The task 2 is committed to task queue by system CPU after creating video source processing task 2.When taking turns to task queue
In video source processing 2 start to process of task when, hardware image processor pass through camera sensing device interface obtain reversing camera shooting
The UYVY format conversions of video source 2 are then rgb format (foundation by format conversion processing by the video stream data of head shooting
Specific display requires, and can also carry out other image procossings such as cutting, rotate, parity field merges).It is completed in format conversion
Afterwards, the video source 2 of rgb format is transmitted to the frame buffer cell specified in configuration by hardware image processor.System CPU is from the frame
The video source 2 of rgb format is read in buffer cell and the boot animation in broadcasting is switched to broadcasting reversing shadow on a display screen
Picture.Direct memory visit may be used in the mode that the video source 2 of rgb format is transmitted to frame buffer cell by hardware image processor
The mode asked, this mode can reduce the occupancy to cpu resource.When switching display, since frame buffer cell does not need to
It is configured using new output, to carry out hardware reset without to frame buffer cell.When the currently playing content of display screen from
When boot animation is switched to reverse image, screen will not also generate scintillation.
It is found that when user completes reversing and closes reverse image function (such as gear switch is D grades), if display logic
It is set in advance as continuing to play boot animation, then switches back into boot animation also applicable the method for the present invention from reverse image.Certainly,
The method of the present invention is applicable not only to the switching between boot animation and reverse image and shows, vehicle-mounted information and entertainment system other not
It will be also applicable in when same video source (being especially the different situation of the unprocessed form of video source) switching display.For example, at described image
Reason method can be additionally used in vehicle-mounted information and entertainment system start process the scene of early radar warning image before starting.Then, system boot
The boot animation shown in the process corresponds to the video source 1 in above-mentioned example, the video shadow shot after early radar warning before user's triggering
As the video source 2 in corresponding above-mentioned example.In another example described image processing method can be additionally used in vehicle-mounted information and entertainment system driving
The scene that recording image and reverse image mutually switch.Then, driving recording video corresponds to the video source 1 in above-mentioned example, user
The video that backup camera is shot after startup car-backing function corresponds to the video source 2 in above-mentioned example.
Although the present invention has been disclosed in the preferred embodiments as above, present invention is not limited to this.Any art technology
Personnel, without departing from the spirit and scope of the present invention made by it is various change and modification, should all be included in the present invention protection model
In enclosing, therefore protection scope of the present invention should be subject to claim limited range.
Claims (8)
1. a kind of switching in vehicle-mounted information and entertainment system shows image processing method when different video source, which is characterized in that
Including：
It is pre-configured the output format that video source contents time frame buffer cell is shown to user；
To the video source that need to currently show, is created in the hardware image processor of vehicle-mounted information and entertainment system and handle the video source
Task, the configuration for creating task includes input address for obtaining video source and exports video with the output format
Source；
To need to currently switch the new video source of display, the handling the new video source of the task, wound are created in hardware image processor
The configuration for building task includes input address for obtaining new video source and with output format output new video source；
Processed video source is transmitted to frame buffer cell by hardware image processor when each single item task is completed, with to user
Show video source contents.
2. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that hardware image processor uses dma mode transmission data when obtaining each video source.
3. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that hardware image processor is passed when processed video source is transmitted to frame buffer cell using dma mode
Transmission of data.
4. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that after establishment task by task submit hardware image processor task queue in etc. it is pending；And
Hardware image processor handles task according to task queue.
5. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that image processing tasks include it is following any one or more：Format conversion, cutting, rotation, odd even occasion
And.
6. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that described image processing method is used in vehicle-mounted information and entertainment system start process start the field of reverse image
Scape, the video source that need to currently show are boot animation, and the new video source that need to currently switch display is backup camera video.
7. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that early radar warning shadow before described image processing method is used in vehicle-mounted information and entertainment system start process start
The scene of picture, the video source that need to currently show are boot animation, and the new video source that need to currently switch display is that preceding early radar warning regards
Frequency image.
8. the image processing method in vehicle-mounted information and entertainment system when switching display different video source as described in claim 1
Method, which is characterized in that described image processing method is mutual for vehicle-mounted information and entertainment system driving recording image and reverse image
The scene of switching, the video source that need to currently show are driving recording video, and the new video source that need to currently switch display is that reversing is taken the photograph
As head video.
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| CN201810604496.1A CN108810591A (en) | 2018-06-12 | 2018-06-12 | Switching shows image processing method when different video source |
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| CN110730305A (en) * | 2019-10-28 | 2020-01-24 | 北京旷视科技有限公司 | Multi-source snapshot image processing and accessing method and device based on blocking queue |
| CN110738975A (en) * | 2019-11-11 | 2020-01-31 | 延锋伟世通电子科技（南京）有限公司 | method for quickly displaying boot animation of full liquid crystal instrument |
| CN111107404A (en) * | 2019-12-27 | 2020-05-05 | 珠海全志科技股份有限公司 | Method, system and storage medium for quickly playing interface video of automobile and mobile terminal |
| CN111314630A (en) * | 2018-12-11 | 2020-06-19 | 中强光电股份有限公司 | Display apparatus and display method thereof |
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Address after: 200082 538 Dalian Road, Yangpu District, Shanghai Applicant after: Mainland Investment (China) Co., Ltd. Address before: 200082 538 Dalian Road, Yangpu District, Shanghai Applicant before: Continental Automotive Asia Pacific (Beijing) Co., Ltd. |
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Application publication date: 20181113 |