CN102316359A - Method and device for transmitting video data - Google Patents
Method and device for transmitting video data Download PDFInfo
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- CN102316359A CN102316359A CN2010102201257A CN201010220125A CN102316359A CN 102316359 A CN102316359 A CN 102316359A CN 2010102201257 A CN2010102201257 A CN 2010102201257A CN 201010220125 A CN201010220125 A CN 201010220125A CN 102316359 A CN102316359 A CN 102316359A
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Abstract
The invention discloses a method and a device for transmitting video data, which aim at solving the problem that the video quality is greatly reduced in the scheme of video data transmission in the prior art. The method comprises the following steps of: reducing the frame frequency of the video data to be transmitted; sending the video data with the frame frequency being a first preset value to a receiving end; and raising the frame frequency of the received video data to a second preset value at a receiving end. When the technical scheme of the invention is adopted, the problem of film image quality reduction caused by forced film source compression can be solved, and the goal of on-line on-demand broadcasting of high-definition film sources without the bandwidth limitation is realized.
Description
Technical field
The present invention relates to computer networking technology, relate to the method and apparatus of transmitting video data especially.
Background technology
Present Web TV has the online request function of video mostly; And the restriction of bandwidth makes the online playing of HD video receive greatly restriction; Present most transmitting video data scheme is that the code check with HD video drops to below the 1M, thereby realizes online smooth playing.For example present most solution is a recompile after through the transcoding equipment (like DRC-500) of specialty program source being decoded.Mainly be through intraframe coding, with the code check reduction of each frame, and interframe encode, remove redundant frame and realize the code check of HD video is dropped to below the 1M.But so, because the reduction of every frame code check makes the quality of video receive very big reduction.
Above-mentioned technology is applied to IPTV through regular meeting; IPTV be with video frequency request program and video broadcast program through video compression technology efficiently, video stream compression is become the files in stream media of the MP-4 of 800Kbps, IP based network transmission; Usually the content distribution service node to be set on the edge of; Configuration flow media services and memory device, user terminal can be IP STB+television sets, also can be PC.
In realizing process of the present invention, the inventor finds that the scheme of above-mentioned existing transmitting video data has been cut down the quality of video significantly, thereby has influenced video request program user's experience.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and apparatus of transmitting video data, has cut down the problem of the quality of video significantly with the scheme that solves transmitting video data in the prior art.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of method of transmitting video data comprises: the frame frequency of video data waiting for transmission is reduced; Said video data after the frame frequency reduction is sent to receiving terminal; Raise at the frame frequency of receiving terminal the video data that receives.
A kind of network equipment of transmitting video data comprises: adjusting module is used for the frame frequency of video data waiting for transmission is reduced; Sending module is used for the said video data after the frame frequency reduction is sent to receiving terminal.
According to technical scheme of the present invention; Also can be comparatively smooth under the limited bandwidth of being transmitted in of video data thereby the reduction that on the one hand reaches code check through the reduction of video data being carried out frame frequency at network side makes;, end side carries out the recovery of frame frequency on the other hand after receiving video data again; Make the video that plays out have good Continuous Vision effect; Thereby solved the problem of suppressing film source by force and causing the cine-oriented image quality to descend, thereby realized that the high definition film source does not receive the bandwidth constraints can online request.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is a kind of structural representation of network of the method that can use the transmitting video data in the embodiment of the invention;
Fig. 2 is the flow chart according to the method for the transmitting video data of the embodiment of the invention;
Fig. 3 is the sketch map according to the structure of the network equipment of transmitting video data in the embodiment of the invention; And
Fig. 4 is the sketch map according to the structure of the terminal installation of transmitting video data in the embodiment of the invention.
Embodiment
Be illustrated below in conjunction with the accompanying drawing specific embodiments of the invention.Under the situation of not conflicting, embodiment and the characteristic among the embodiment among the application can make up each other.Below with reference to accompanying drawing and combine embodiment to specify the present invention.
Fig. 1 is a kind of structural representation of network of the method that can use the transmitting video data in the embodiment of the invention.
Provide the method and apparatus of transmitting video data in the embodiment of the invention, this method can be implemented based on network shown in Figure 1, and this device can be applied in the network shown in Figure 1.
Network shown in Figure 1 mainly comprises video server 11 and one or more terminal equipments 12, video server 11 and terminal equipment 12 through network for example the Internet Internet be connected.
The user can be to terminal equipment 12 input video program requests instruction, and terminal equipment 12 is after receiving this video request program instruction, and request video server 11 sends the specified video file of this instruction.
Network shown in Figure 1 can provide the service of video-see to the user, and for the user, hope can be watched clear and smooth video.For this reason, the embodiment of the invention has provided relevant technical scheme, and its method is as shown in Figure 2.
Fig. 2 is the flow chart according to the method for the transmitting video data of the embodiment of the invention.The method of the transmitting video data of the embodiment of the invention mainly comprises the steps:
Step S21: the frame frequency of video data waiting for transmission is reduced.
Step S22: with frame frequency is that the video data of first preset value sends to receiving terminal.
Step S23: raise at the frame frequency of receiving terminal with the video data that receives.
Below above-mentioned steps is elaborated.
The embodiment of the invention is applicable to the application scenarios that the high definition sheet is sent to the terminal from network.In this application scenarios, the user carries out video request program through the equipment at terminal, and terminal equipment sends corresponding video file according to program request instruction request network side.Video file can be the file that file or other of RMVB form are applicable to the data format of this network and this terminal equipment.
Among the step S21, can adopt Video Transcoding Technology frame frequency to be reduced the frame frequency conversion of video data.Specifically can adopt the DRC-500 Video Transcoding Technology.
Which frame frequency value can select the frame-rate conversion with video data according to the bandwidth that network uses is.For example be 1280 * 720 video file for resolution, its code check is generally 2Mbps to 4Mbps, and frame frequency is 24fps, can be 12fps with the frame-rate conversion of this video file, thereby its code check is dropped to 1Mbps.
The numerical value that frame frequency is reduced among the step S21 can be provided with according to the network bandwidth of transmitting video data, is as the criterion with the video data after can the be basic smooth transmission code rate conversion.
Under the situation that code check is minimized, in step S22, video data can use less bandwidth through network for example the Internet Internet carry out smooth transmission.
In step S22, specifically can come the distribution of video data, thereby realize carrying out the transmission of video data through network through content distributing network CDN (Content Delivery Network).
When carrying out the video data distribution through CDN,, the sheet source file after the conversion is uploaded on the CDN server through SSH Telnet CDN server.On the CDN server, write a script file then, this script file is used for obtaining the CID of film.CID is the deposit information of each film on server; Be that uploading films is behind server; Server according to the form of film size and deposit that the path generates with film source code value one to one, the terminal just can obtain concrete substance film after taking CID) and the cid information that gets access to together imported in the film data storehouse together with film information.Film information comprises information such as film name, director, featured performer, substance film brief introduction.This database is the database in the Web TV background system, is used for the operation of supporting network TV.Through XML Core Generator (script file of writing according to the EPG form) cid information in the database and film information are generated the XML file then.This XML file records the CID of film information and film accordingly.The rendition list function of network TV terminal can only the parsing XML format file, obtains film information behind the terminal parses XML formatted file, and the display unit of this film information through network TV terminal is shown to the user.The user selects film through network TV terminal, and network TV terminal is confirmed again CID to be sent to the CID of this film the CDN server, thereby to obtain the movie data according to the film of selecting.
The example of the XML file of above-mentioned generation is following:
<?xml?version＝″1.0″encoding＝″gb2312″?>
<FilmData>
<Film>
<ID><！[CDATA[409]]></ID>
<title><![CDATA[seven crimes]]></Title>
<class><![CDATA[story of a play or opera]]></Class>
<Director><！[CDATA[solodancer]]></Director>
<actor><![CDATA[cloth rad skin is special]];</Actor>
<area><![CDATA[Hollywood]]></Area>
<Format><！[CDATA[rmvb]]></Format>
<Size><！[CDATA[1.7G]]></size>
<PubTime><！[CDATA[2010-4-2]]></PubTime>
<LongTime><！[CDATA[120min]]></LongTime>
<Language><！[CDATA[]]></Language>
<description><![CDATA[seven crimes is used to test N2M]]></Description>
<BImgUrl/>
<SImgUrl/>
<FilmScore><！[CDATA[3]]></FilmScore>
<IPTV/>
<CopyRight/>
<Down>
<Url>
<ContentIndex><！[CDATA[1]]></ContentIndex>
<Size><！[CDATA[1.7G]]></Size>
<LongTime><！[CDATA[120min]]></LongTime>
<Format><！[CDATA[rmvb]]></Format>
<WebUrl/>
<DownUrl><！[CDATA[D74F28FEBDEDEEF9E37676EA9FAEBB8C1BBEC68C，
D7FA9CDCDED517278BADE99C8ADAEBB976CF79A0,1720490020]]></DownUrl>(being film CID) here
<VipFlag/>
<ScreenWidth><！[CDATA[16]]></ScreenWidth>
<ScreenHeight><！[CDATA[9]]></ScreenHeight>
<ContentName><！[CDATA[23fps]]></ContentName>
<PartIndex><！[CDATA[1]]></PartIndex>
<partName><![CDATA[seven crimes 1]]></PartName>
</Url>
<Url>
<ContentIndex><！[CDATA[1]]></ContentIndex>
<Size><！[CDATA[1.7G]]></Size>
<LongTime><！[CDATA[120min]]></LongTime>
<Format><！[CDATA[rmvb]]></Format>
<WebUrl/>
<DownUrl><！[CDATA[D74F28FEBDEDEEF9E37676EA9FAEBB8C1BBEC68C，
D7FA9CDCDED517278BADE99C8ADAEBB976CF79A0，1720490020]]></DownUrl>
<VipFlag/>
<ScreenWidth><！[CDATA[16]]></ScreenWidth>
<ScreenHeight><！[CDATA[9]]></ScreenHeight>
<ContentName><！[CDATA[23fps]]></ContentName>
<PartIndex><！[CDATA[1]]></PartIndex>
<partName><![CDATA[seven crimes 1]]></PartName>
</Url>
</Down>
</Film>
</FilmData>
In step S21, for transmitting video files glibly, the frame frequency after changing is usually less than 24fps.Because make human eye can feel that video is that the minimum frame frequency of continuous effect is 24fps,, its frame frequency increased, thereby make the video of broadcast that good visual effect arranged so in step S13, the video data of receiving is handled by terminal equipment.
Terminal equipment can use the N2M technology video data of low frame rate to be reduced to the video data of smooth high frame frequency.Numerical value after frame frequency raises among the step S23 can be set in the process of using the N2M technology.Can be the frame frequency of this video data before network side carries out the frame frequency reduction.
The N2M technology can be with the media file of various forms, when playing, carries out real-time estimating computing and contact pin is handled.Compare with MEMC and can only carry out image processing the TV programme of present fixedly standard; The N2M technology is more flexible; Can carry out image processing to the media file of the various forms on the Internet, particularly better with the image processing effect of dynamic frame frequency for low frame rate.
Below again the device in the embodiment of the invention is made an explanation.
Fig. 3 is the sketch map according to the structure of the network equipment of transmitting video data in the embodiment of the invention.
The network equipment of the transmitting video data in the embodiment of the invention can be arranged in the video server of network side, for example the video server among Fig. 1 11.
As shown in Figure 3, the network equipment 30 of the transmitting video data in the embodiment of the invention mainly comprises adjusting module 31 and sending module 32.
Adjusting module 31 is used for the frame frequency of video data waiting for transmission is reduced, and sending module 32 is used for the said video data after the frame frequency reduction is sent to receiving terminal.The receiving terminal here can be one or more terminal equipments 12 shown in Figure 1.
Sending module 32 can also be used for through the video data after the reduction of content distributing network distribution frame frequency.
The terminal installation of the transmitting video data in the embodiment of the invention can be arranged in the terminal equipment, for example the terminal equipment among Fig. 1 12.
Fig. 4 is the sketch map according to the structure of the terminal installation of transmitting video data in the embodiment of the invention.
As shown in Figure 4, the terminal installation 40 of the transmitting video data in the embodiment of the invention mainly comprises receiver module 41 and processing module 42.
Receiver module 41 is used for receiving video data.This video data can be to carry out frame frequency at network side to handle the video data after reducing of frame frequency for example.Processing module 42 is used for the video data that receiver module 41 receives is handled, and the frame frequency of this video data is raise.
A kind of optional structure of processing module 41 is to comprise interleave submodule and output sub-module, thereby wherein the interleave submodule is used to use the N2M technology that video data is carried out the frame frequency rising that the interleave processing makes this video data.This video data is the data that receiver module 41 receives.Output sub-module is used to export interleave and handles video data afterwards.
Provide a kind of system of transmitting video data in the present embodiment again.This system can be contained in the system shown in Figure 1.The system of this transmitting video data in the present embodiment mainly comprises the network equipment of the transmitting video data in the present embodiment and the terminal installation of transmitting video data, and the two forms communication through wired or wireless network and connects.
From above description, can find out; In the technical scheme of present embodiment; Also can be comparatively smooth under the limited bandwidth of being transmitted in of video data thereby the reduction that on the one hand reaches code check through the reduction of video data being carried out frame frequency at network side makes;, end side carries out the recovery of frame frequency on the other hand after receiving video data again; Make the video that plays out have good Continuous Vision effect, thereby solved the problem of suppressing film source by force and causing the cine-oriented image quality to descend, thereby realized that the high definition film source does not receive the bandwidth constraints can online request.
Obviously, it is apparent to those skilled in the art that above-mentioned each module of the present invention or each step can realize with the general calculation device; They can concentrate on the single calculation element; Perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element; Thereby; Can they be stored in the storage device and carry out, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize by calculation element.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method for a transmitting video data is characterized in that, comprising:
The frame frequency of video data waiting for transmission is reduced;
Said video data after the frame frequency reduction is sent to receiving terminal;
Raise at the frame frequency of receiving terminal the video data that receives.
2. method according to claim 1 is characterized in that, the said video data after frame frequency is reduced comprises to the step that receiving terminal sends: the video data after reducing through content distributing network distribution frame frequency.
3. method according to claim 1 and 2 is characterized in that, the step that the frame frequency of said video data is raise comprises: said video data is carried out interleave handle and make its frame frequency be increased to the frame frequency before reducing.
4. method according to claim 3 is characterized in that, said video data is carried out the interleave processing comprise: when carrying out video output according to said video data, use the N2M technology that said video data is carried out interleave and handle.
5. the network equipment of a transmitting video data is characterized in that, comprising:
Adjusting module is used for the frame frequency of video data waiting for transmission is reduced;
Sending module is used for the said video data after the frame frequency reduction is sent to receiving terminal.
6. device according to claim 5 is characterized in that, said sending module also is used for through the video data after the reduction of content distributing network distribution frame frequency.
7. the terminal installation of a transmitting video data is characterized in that, comprising:
Receiver module is used to receive the video data after frame frequency reduces;
Processing module, the frame frequency of the said video data that is used to raise.
8. terminal installation according to claim 7 is characterized in that, said processing module comprises:
The interleave submodule is used to use the N2M technology that said video data is carried out interleave and handles the frame frequency rising that makes said video data;
Output sub-module is used to export said interleave and handles video data afterwards.
9. the system of a transmitting video data is characterized in that, comprises described network equipment of claim 5 and the described terminal installation of claim 7.
10. system according to claim 9 is characterized in that,
Sending module in the said network equipment also is used for distributing said video data through content distributing network;
Processing module in the said terminal installation comprises:
The interleave submodule is used to use the N2M technology that said video data is carried out interleave and handles;
Output sub-module is used to export said interleave and handles video data afterwards.
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| CN2010102201257A CN102316359A (en) | 2010-06-30 | 2010-06-30 | Method and device for transmitting video data |
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|---|---|---|---|
| CN2010102201257A CN102316359A (en) | 2010-06-30 | 2010-06-30 | Method and device for transmitting video data |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105812838A (en) * | 2016-03-17 | 2016-07-27 | 深圳市九洲电器有限公司 | Multi-screen interaction data sharing method and system |
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| US6871006B1 (en) * | 2000-06-30 | 2005-03-22 | Emc Corporation | Processing of MPEG encoded video for trick mode operation |
| CN101222296A (en) * | 2008-01-31 | 2008-07-16 | 上海交通大学 | Self-adapting transmission method and system in ascending honeycomb video communication |
| CN101316361A (en) * | 2007-06-01 | 2008-12-03 | 上海迪维欧电子设备有限公司 | High-resolution digital image conveying method at low network band width |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6871006B1 (en) * | 2000-06-30 | 2005-03-22 | Emc Corporation | Processing of MPEG encoded video for trick mode operation |
| CN1531345A (en) * | 2003-03-12 | 2004-09-22 | 明基电通股份有限公司 | Image transmission system and method |
| CN101316361A (en) * | 2007-06-01 | 2008-12-03 | 上海迪维欧电子设备有限公司 | High-resolution digital image conveying method at low network band width |
| CN101222296A (en) * | 2008-01-31 | 2008-07-16 | 上海交通大学 | Self-adapting transmission method and system in ascending honeycomb video communication |
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| CN105812838A (en) * | 2016-03-17 | 2016-07-27 | 深圳市九洲电器有限公司 | Multi-screen interaction data sharing method and system |
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Application publication date: 20120111 |