CN102769737A - Video image switching method and system - Google Patents
Video image switching method and system Download PDFInfo
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- CN102769737A CN102769737A CN2012102522295A CN201210252229A CN102769737A CN 102769737 A CN102769737 A CN 102769737A CN 2012102522295 A CN2012102522295 A CN 2012102522295A CN 201210252229 A CN201210252229 A CN 201210252229A CN 102769737 A CN102769737 A CN 102769737A
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Abstract
The invention relates to a video field and provides a video image switching method. The video image switching method comprises the following steps of: storing received first video data in a pre-set first buffering area, and recording an address of the first buffering area; outputting a first video according to the address of the first buffering area; storing received second video data in a pre-set second buffering area, and recording an address of the second buffering area; and when a pre-set switching order is received, outputting a second video according to the address of the second buffering area. The invention correspondingly provides a video image switching system. With the adoption of the video image switching method and the video image switching device provided by the invention, the problems that the conventional video conference system usually has phenomena of pixelizations and blurred screens can be solved; and the image switching effect is relatively good.
Description
Technical field
The present invention relates to the video playback technical field, particularly relate to a kind of video picture switching process, and a kind of video pictures switched system.
Background technology
Existing video conferencing system based on MCU (Multipoint Control Unit, multipoint control unit) comprises MCU service end and a plurality of terminal equipment, when video conference has the terminal-joined more than three, the situation of video switch then possibly occur; For example during the multichannel synthetic video at other two terminals of one of them terminal plays, when this terminal desire is play the HD video at another terminal, just need switch to HD video from the multichannel synthetic video.
Traditional picture hand-off process is; When a certain terminal when the MCU service end is sent the high definition mode switch request to another terminal, this terminal switches to single channel HD video pattern immediately, stops to receive the multichannel synthetic video simultaneously; But because the HD video at another terminal need pass through coding, upload and be forwarded to this terminal again; So when switching to the high definition picture, can't read video data at once, often cause mosaic and Hua Ping phenomenon, picture switches poor effect.
Summary of the invention
Based on this, the present invention provides a kind of video picture switching process and system, has solved the mosaic and the Hua Ping problem that occur when traditional picture switches, and it is better that picture switches effect.
A kind of video picture switching process comprises the steps: first video data that receives is stored in the first preset buffering area address of writing down said first buffering area;
According to the address of said first buffering area, export first video;
Second video data that receives is stored in the second preset buffering area address of writing down said second buffering area;
When receiving preset switching command, export second video according to the address of said second buffering area.
A kind of video pictures switched system comprises: first memory module, first output module, second memory module and second output module;
Said first memory module is used for first video data that receives is stored in the first preset buffering area, the address of writing down said first buffering area;
Said first output module is used for the address according to said first buffering area, exports first video;
Said second memory module is used for second video data that receives is stored in the second preset buffering area, the address of writing down said second buffering area;
Said second output module is used for when receiving preset switching command, according to the address of said second buffering area, exports second video.
The present invention when sending handoff request, because of not receiving preset switching command, continues to broadcast the preceding video of switching through different buffer stores and the different video data of handling the reception of switching front and back; When receiving switching command; Owing to the video data after switching in buffering area decoding generate video; After upgrading OPADD, the video after can will switching is output glibly at once, guarantees that picture switches the back clear picture; Solved and switched mosaic and the Hua Ping problem that occurs often in the conventional video conference system, it is better that picture switches effect.
Description of drawings
Fig. 1 is a video picture switching process of the present invention schematic flow sheet in one embodiment.
Fig. 2 is the video picture switching process of the present invention configuration diagram of video conferencing system in one embodiment.
Fig. 3 is a video pictures switched system of the present invention structural representation in one embodiment.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is done further explain, but execution mode of the present invention is not limited thereto.
As shown in Figure 1, be video picture switching process of the present invention schematic flow sheet in one embodiment, this method step is following:
S11, first video data that will receive are stored in the first preset buffering area, the address of writing down said first buffering area;
Picture changeover method of the present invention is applicable to the video conferencing system based on MCU, and is as shown in Figure 2; It is the Organization Chart of video conferencing system; The MCU service end is the server in the video conferencing system, is responsible for exchange video data and transmitting control commands, and terminal T1 ~ Tn is the terminal in the video conferencing system; Be responsible for sending or receiving video data, and resolve the control command that MCU sends;
In the present embodiment, can in the memory headroom at terminal, open up a plurality of buffering areas; The purpose of opening up different buffering areas is in order to store and to handle the different video data that receives, because each buffering area can work alone, has realized that the terminal handles a plurality of different video datas simultaneously; Opening up two buffering areas in the present embodiment can realize, one of them is used to store and handle the video data before picture switches, and the video data before this switching is designated as first video data, and this buffering area is designated as first buffering area; Another is used to store and handle the video data after picture switches, and the video data after this switching is designated as second video data, is designated as second buffering area; Wherein, The first and secondth, relative concept, picture switches such as switch to next time from last picture, in last once picture switches; Video data after the switching is respectively second video data and second buffering area with the buffering district; But with respect to picture switching next time, then be again first video data and first buffering area, above-mentioned first and second is not to refer in particular to;
S12, according to the address of said first buffering area, export first video;
In a preferred embodiment; The encoding code stream that this video data sends for the MCU service end; In video conferencing system, generally control a plurality of terminals through the MCU service end; Each terminal is a code stream with the video coding of real time communication, is uploaded to the MCU service end and carries out Unified Treatment and forwarding, realizes that each terminal information is mutual;
Behind the encoding code stream that receives the transmission of MCU service end, be stored in first buffering area it and decoding, generate first video; The address of first buffering area of record is sent to the output interface at terminal, and output interface is the video of exportable this buffer stores according to the address of this buffering area;
S13, will receive second video data that said service end sends and be stored in the second preset buffering area address of writing down said second buffering area;
In a preferred embodiment, also can comprise step before the step S13:
Send the picture handoff request to service end;
Receive said second video data that said service end is returned according to said picture handoff request;
When the terminal when the MCU service end is sent the picture handoff request; Notify the other-end encoding code stream by the MCU service end according to this picture handoff request; Being uploaded to the MCU service end again behind the other-end coding transmits; Said second video data that this terminal will receive is stored in said second buffering area decodes, and generates second video;
In above-mentioned steps, send the picture handoff request from the terminal after, between the process that receives new video data, need to wait for that the MCU service end notifies, receives and transmit, different equipment is because its processor processes ability is different, its stand-by period differs; In the present invention,, can know that because the address that the output interface at terminal receives is the address of first buffering area, first video is still play at this terminal from step S12 though sent the picture handoff request;
S14, when receiving preset switching command, export second video according to the address of said second buffering area;
In a preferred embodiment, this step specifically can comprise:
When receiving said switching command, the OPADD of output interface is updated to the address of said second buffering area;
According to the address of said second buffering area, export said second video of storing in said second buffering area;
Can switch order in MCU service end preset, can know from sending the picture handoff request when receiving video data have first-class to treat the time by abovementioned steps; In addition, the terminal also needs its decoding after receiving video data; Therefore can after a period of time after sending the picture handoff request, send one by said MCU service end and switch order according to the processing speed of distinct device;
When receiving this switching command, the address of second buffering area of record is sent to output interface, upgrade the OPADD of output interface;
Because second video data has been stored in second buffering area and decoding,, the mosaic and the Hua Ping phenomenon that occur when conventional visual is switched have successfully been solved so after the OPADD of output interface upgrades, can export second video in second buffering area at once;
In a preferred embodiment, above-mentioned output interface is the HDMI interface, to guarantee the definition of terminal output video.
Further specify the present invention through an embodiment below:
In the memory headroom of the high definition encoding and decoding card at each terminal, open up the buffering area more than 2 or 2, be used for the encoding code stream that store M CU service end is sent; In the present embodiment, be that example describes to open up 2 buffering areas (first buffering area and second buffering area);
Video conferencing system is opened, and the request that terminal T1 sends the synthesis model video of viewing terminal T2 ~ T5 to the MCU service end by each encoding code stream of MCU service end receiving terminal T2 ~ T5, is redispatched to terminal T1 after synthesizing; Terminal T1 is stored in above-mentioned arbitrary buffering area of having opened up (being designated as first buffering area) address of writing down first buffering area with the generated data (being designated as first video data) that receives; In first buffering area, the synthetic encoding code stream back of decoding is generated video, the address of first buffering area is sent to the output interface of terminal T1, output interface can be exported the video in this buffering area according to the address;
When the terminal received the instruction of single channel HD video of user's viewing terminal T2, terminal T1 sent the picture handoff request to the MCU service, and request switches to the single channel high definition picture of terminal T2; At this moment, because the OPADD of terminal T1 is not changed, continue the output synthetic video; The MCU service end is transmitted to terminal T1 again according to the picture handoff request notice terminal T2 encoding code stream that receives after the reception, this encoding code stream is designated as second video data; After terminal T1 receives,, then select another buffering area, be designated as second buffering area, encoding code stream is stored in second buffering area decodes, generate second video, write down the address of second buffering area simultaneously because first buffering area has stored data;
Preset update command in the MCU service end is sent after being set to receive 5 seconds after the picture request; Terminal T1 sends to output interface with the address of second buffering area of record after receiving this update command, upgrade the address of output interface; Output interface is second video in exportable second buffering area; The completion because second video data in second buffering area has been decoded, the display screen of terminal T1 can broadcast smooth video, can not produce mosaic or flower screen phenomenon;
The picture at terminal switches; Be not limited to the above-mentioned example that switches to single channel high definition pattern from synthesis model; Can comprise that also from single channel high definition mode switch be synthesis model or from the single channel high definition mode switch at a certain terminal multiple picture switch instances such as single channel high definition pattern for another terminal; Any picture switching mode is all in protection scope of the present invention.
Corresponding, as shown in Figure 3, be video pictures switched system of the present invention structural representation in one embodiment, comprise first memory module 31, first output module 32, second memory module 33 and second output module 34;
Said first memory module 31 is used for first video data that receives is stored in the first preset buffering area, the address of writing down said first buffering area;
In the memory headroom at each terminal, open up a plurality of buffering areas, be used to store and handle the different video data that receives, be implemented in the terminal and handle a plurality of different video datas simultaneously; Opening up two buffering areas in the present embodiment can realize, one of them is used to store and handle the video data before picture switches, and the video data before this switching is designated as first video data, and this buffering area is designated as first buffering area; Another is used to store and handle the video data after picture switches, and the video data after this switching is designated as second video data, is designated as second buffering area;
Said first output module 32 is used for the address according to said first buffering area, exports first video;
In a preferred embodiment; The encoding code stream that this video data sends for the MCU service end; In video conferencing system, generally control a plurality of terminals through the MCU service end; Each terminal is a code stream with the video coding of real time communication, is uploaded to the MCU service end and carries out Unified Treatment and forwarding, realizes that each terminal information is mutual;
Behind the encoding code stream that receives the transmission of MCU service end, be stored in first buffering area it and decoding, generate first video; The address of first buffering area of record is sent to the output interface at terminal, and output interface is the video of exportable this buffer stores according to the address of this buffering area;
Said second memory module 33 is used for second video data that receives is stored in the second preset buffering area, the address of writing down said second buffering area;
In a preferred embodiment, before second memory module 33, sending module and receiver module have also been connected;
Said sending module is used for sending the picture handoff request to service end;
Said receiver module is used to receive said second video data that said service end is returned according to said picture handoff request;
When sending module is passed through when the MCU service end is sent the picture handoff request in the terminal; Notify the other-end encoding code stream by the MCU service end according to this picture handoff request; Being uploaded to the MCU service end again behind the other-end coding transmits; Said second video data that the receiver module at this terminal will receive is stored in said second buffering area in second memory module and decodes, and generates second video;
After sending the picture handoff request from the terminal, between the process that receives new video data, need to wait for that the MCU service end notifies, receives and transmit, different equipment is because its processor processes ability is different, and its stand-by period differs; In the present invention, though sent the picture handoff request, first output module 32 can know that because the address that the output interface at terminal receives is the address of first buffering area, first video is still play at this terminal;
Said second output module 34 is used for when receiving preset switching command, according to the address of said second buffering area, exports second video;
In a preferred embodiment, said second output module 34 can comprise update module and output module;
Said update module is used for when receiving said switching command, the OPADD of output interface is updated to the address of said second buffering area;
Said output module is used for the address according to said second buffering area, exports said second video of storing in said second buffering area;
Can switch order in MCU service end preset, owing to, have first-class to treat the time from sending the picture handoff request when receiving video data; In addition, the terminal also needs its decoding after receiving video data; Therefore can after a period of time after sending the picture handoff request, send one by said MCU service end and switch order according to the processing speed of distinct device;
When receiving this switching command, the address of second buffering area of record is sent to output interface, upgrade the OPADD of output interface;
Because second video data has been stored in second buffering area and decoding,, the mosaic and the Hua Ping phenomenon that occur when conventional visual is switched have successfully been solved so after the OPADD of output interface upgrades, can export second video in second buffering area at once;
In a preferred embodiment, said output interface can be the HDMI interface, to guarantee the definition of terminal output video.
The present invention when sending handoff request, because of not receiving preset switching command, continues to broadcast the preceding video of switching through different buffer stores and the different video data of handling the reception of switching front and back; When receiving switching command; Owing to the video data after switching in buffering area decoding generate video; After upgrading OPADD, the video after can will switching is output glibly at once, guarantees that picture switches the back clear picture; Solved and switched mosaic and the Hua Ping problem that occurs often in the conventional video conference system, it is better that picture switches effect.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the present invention's design, 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 accompanying claims.
Claims (10)
1. a video picture switching process is characterized in that, comprises the steps:
First video data that receives is stored in the first preset buffering area address of writing down said first buffering area;
According to the address of said first buffering area, export first video;
Second video data that receives is stored in the second preset buffering area address of writing down said second buffering area;
When receiving preset switching command, export second video according to the address of said second buffering area.
2. video picture switching process according to claim 1 is characterized in that, said second video data that will receive is stored in the second preset buffering area, write down the step of address of said second buffering area before, also comprise step:
Send the picture handoff request to service end;
Receive said second video data that said service end is returned according to said picture handoff request.
3. according to each described video picture switching process of claim 1 ~ 2, it is characterized in that said first video data is an encoding code stream, said second video data is an encoding code stream.
4. video picture switching process according to claim 1 is characterized in that, and is said when receiving preset update command, and according to the address of said second buffering area, the step of exporting second video specifically comprises:
When receiving said switching command, the OPADD of output interface is updated to the address of said second buffering area;
According to the address of said second buffering area, export said second video of storing in said second buffering area.
5. video picture switching process according to claim 4 is characterized in that, said output interface is the HDMI interface.
6. a video pictures switched system is characterized in that, comprises first memory module, first output module, second memory module and second output module;
Said first memory module is used for first video data that receives is stored in the first preset buffering area, the address of writing down said first buffering area;
Said first output module is used for the address according to said first buffering area, exports first video;
Said second memory module is used for second video data that receives is stored in the second preset buffering area, the address of writing down said second buffering area;
Said second output module is used for when receiving preset switching command, exporting second video according to the address of said second buffering area.
7. video pictures switched system according to claim 6 is characterized in that, also comprises sending module and receiver module;
Said sending module is used for sending the picture handoff request to service end;
Said receiver module is used to receive said second video data that said service end is returned according to said picture handoff request.
8. according to each described video pictures switched system of claim 6 ~ 7, it is characterized in that said first video data is an encoding code stream, said second video data is an encoding code stream.
9. video pictures switched system according to claim 6 is characterized in that, said second output module comprises update module and output module;
Said update module is used for when receiving said switching command, the OPADD of output interface is updated to the address of said second buffering area;
Said output module is used for the address according to said second buffering area, exports said second video of storing in said second buffering area.
10. video pictures switched system according to claim 9 is characterized in that, said output interface is the HDMI interface.
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| CN2012102522295A CN102769737A (en) | 2012-07-19 | 2012-07-19 | Video image switching method and system |
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| CN103347165A (en) * | 2013-07-25 | 2013-10-09 | 广东威创视讯科技股份有限公司 | Method for processing video data and terminal |
| WO2014079254A1 (en) * | 2012-11-20 | 2014-05-30 | 中兴通讯股份有限公司 | Teleconference information insertion method, device and system |
| CN106502641A (en) * | 2016-09-18 | 2017-03-15 | 北京小鸟看看科技有限公司 | The display packing of the start-up picture of VR equipment and wear-type 3D display |
| CN110336975A (en) * | 2019-07-12 | 2019-10-15 | 浙江华创视讯科技有限公司 | The switching method of video flowing and the playback terminal of video flowing |
| CN110856010A (en) * | 2019-11-27 | 2020-02-28 | 北京翔云颐康科技发展有限公司 | Video playing method and device, storage medium and electronic equipment |
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Application publication date: 20121107 |