CN103702139A - Video-on-demand system based on scalable coding under mobile environment - Google Patents
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Abstract
The invention discloses a video-on-demand system based on scalable coding under mobile environment. The video-on-demand system comprises a video-on-demand request module, a video adaptive adjustment module and a video source processing module, wherein the video source processing module is used for the access of a video source, preprocessing and scalable video coding (SVC) to generate layered video files; the video-on-demand request module generates a video-on-demand request and feeds equipment parameters of a mobile terminal and a network state for receiving data back to the video adaptive adjustment module; the video adaptive adjustment module extracts the resolution ratio or the code rate as required from the layered video files according to the feedback; the extracted video files are decoded and can be played on the mobile terminal. According to the video-on-demand system, users with different terminal equipment can watch video in different resolution ratios and can adjust the video quality according to the change of the network state of the mobile terminal, the quick response to the user request and high-quality uninterrupted playing service are guaranteed, the calculating pressure of a server is reduced, and a storage space is saved.
Description
Technical field
The present invention relates to the video request program field under mobile internet environment, more particularly, the present invention relates to the video on-demand system based on scalable coding under a kind of mobile environment.
Background technology
Along with the develop rapidly of mobile Internet, program request whenever and wherever possible watches Internet video to become the active demand of mobile phone users.Mobile Internet is different from the Internet, the feature such as its environment has that equipment is various, change when network isomery, network, multi-user.Mobile terminal device, owing to being subject to the condition restriction such as resolution, decoding capability, the network bandwidth, flying power, is difficult to direct program request as computer and watches Internet video, and video code conversion arises at the historic moment.Existing video code conversion system adopts off-line transcoding mostly, and the video of pre-stored several different resolutions, code check meets the demand of watching of different terminal equipment.Yet, by the video data transcoding of magnanimity, be several different versions, memory space is had to very large requirement.Take YouTube as example, YouTube supports 1080P, 720P, 480P, 360P, 240P, six kinds of video image quality of 240Plight, it is the version that each video will be stored above 6 quality, the video of 1 minute calculates (being averaged quality) by 2MB, the video length of uploading per hour is 360000 minutes, the storage size of YouTube needs per hour is about 4TB so, every day, the increment of video was about 100TB, increment is monthly 3PB, and this numeral is also going up with surprising rapidity.In face of the video data of magnanimity, several video version that prestore are in advance unpractical.
Real-time transcoding is a kind of scheme effectively addressing this is that, according to different mobile terminals and current network bandwidth, provide the live video stream of transcoding limit, limit broadcasting to watch service, yet real-time transcoding has very high requirement to the computing capability of server, cannot tackle multi-user's concurrent order request.DASH(Dynamic Adaptive Streaming over HTTP) as a kind of dynamic self-adapting Streaming Media scheme, can select different code checks to transmit according to mobile terminal network situation, each video will be transcoded into the version of a plurality of different code checks in advance, and memory space has been proposed to very large requirement equally.
Summary of the invention
Above defect or Improvement requirement for prior art, the invention provides the video on-demand system based on scalable coding under a kind of mobile environment, this system is applicable to that equipment is various, become when network isomery, network, multi-user's mobile internet environment, the video of multiple resolution, multiple quality, various code rate can be provided, thereby the mobile subscriber's demand to video playback under network condition complicated and changeable that meets different terminal equipment, extensibility is strong.
The technical solution adopted for the present invention to solve the technical problems is, video on-demand system based on scalable coding under a kind of mobile environment is provided, described system comprises: video on-demand request module, video self adaptation adjusting module and video source processing module, described video on-demand request module is connected with described video self adaptation adjusting module, described video self adaptation adjusting module is connected with described video source processing module, described video source processing module is connected with described video on-demand request module
The list of videos that described video on-demand request module is upgraded for receiving described video source processing module, user produces video on-demand request while having program request behavior, and the processing and the response that send in real time described video self adaptation adjusting module to ask the order request that has comprised video name and mobile terminal device parameter; The video data that simultaneously receives described self adaptation adjusting module carries out the real-time statistics of network condition, and statistics is fed back to described video self adaptation adjusting module;
Video on-demand request and network condition real-time statistics result that described video self adaptation adjusting module produces for receiving described video on-demand request module, the resolution of video or code check are adjusted, and according to adjusting parameter, the layered video file in video source processing module is extracted, send to described video on-demand request module;
Described video source processing module is for access, preliminary treatment and the SVC coding of video source, upgrade list of videos to facilitate described video on-demand request module to use, the layered video file that storage has been encoded extracts according to adjusting parameter for described video self adaptation adjusting module.
In video on-demand system based on scalable coding under mobile environment of the present invention, described video on-demand request module comprises that the synchronous submodule of list of videos, terminal parameter extract submodule, video request submodule, data buffer storage submodule and network-feedback submodule;
The synchronous submodule of described list of videos can be for the list of videos of program request for generating on mobile terminal device, Data Source is the list of videos of upgrading in described video source processing module, when user has program request behavior, send video name to described video request submodule;
Described terminal parameter extracts submodule for after the arbitrary video of user's program request, extracts the device parameter of mobile terminal, and sends the device parameter of extraction to described video request submodule;
Described video request submodule is for integrating the video name receiving from the synchronous submodule of described list of videos and the device parameter receiving from described terminal parameter submodule, to described video self adaptation adjusting module, send video on-demand request, meanwhile, to described data buffer storage submodule, send the request that receives data;
Described data buffer storage submodule is for receiving the request of the reception data that described video request submodule sends, described in buffer memory, video self adaptation adjusting module sends over according to the layered video file of having encoded of adjusting after parameter extraction, sends the size of described video file and time used to described network-feedback submodule simultaneously;
Described network-feedback submodule is for the value with Time Calculation network broadband used according to the video data size receiving from described data buffer storage submodule, and this value is fed back to described video self adaptation adjusting module for it, carries out the adjustment of video code rate.
In video on-demand system based on scalable coding under mobile environment of the present invention, described video self adaptation adjusting module comprises video request processing submodule, video resolution decision-making submodule, network monitor submodule, video code rate decision-making submodule, video parameter adjustment submodule and video extraction submodule;
Described video request is processed submodule for receiving in real time the video on-demand request that described video on-demand request module is sent, and sends to described video resolution decision-making submodule to carry out the decision-making of video resolution for it information of device parameter in request msg;
Described video resolution decision-making submodule is processed the device parameter of submodule for receiving described video request, according to device parameter, decision-making goes out the video resolution of applicable terminal plays, and video resolution information is sent to described video parameter adjusts submodule;
Described network monitor submodule is for receiving in real time the value of the network broadband of described video on-demand request module feedback, thereby the variation of monitoring mobile terminal device mobile terminal network situation, and it carries out the decision-making of video code rate to send the value of network broadband to described video code rate decision-making submodule confession;
Described video code rate decision-making submodule, for receiving the value of described network monitor submodule network broadband, sends to the best code check of user's video according to the value decision-making of network broadband, video code rate information is sent to described video parameter and adjusts submodule;
Described video parameter is adjusted submodule for receiving, integrate from the video resolution information of described video resolution decision-making submodule and from the video code rate information of described video code rate decision-making submodule, and the video information after integrating is sent to described video extraction submodule;
Video information the integration that described video extraction submodule receives from described video parameter adjustment submodule for basis, layered video file in described video source processing module is extracted, form to be applicable to that mobile terminal device shows, play continuous video.
In video on-demand system based on scalable coding under mobile environment of the present invention, described video source processing module comprises video source access submodule, video pre-filtering submodule, video SVC encode submodule, list of videos index submodule and video storage submodule;
Described video source access submodule is used to described video on-demand system that source video sequence is provided, and source video sequence information is sent to described video pre-filtering submodule;
Described video pre-filtering submodule is the data flow of the most original yuv format for the video-information decoding that described video access submodule is sent;
Described video SVC coding submodule is for carrying out described data flow SVC coding generating video hierarchical file, hierarchical file is sent to described video storage submodule after encoding successfully, sends hierarchical file relevant information to described list of videos index submodule;
Index is preserved and set up to described list of videos index submodule for the hierarchical file relevant information that described video SVC coding submodule is transmitted, for described video on-demand request module generate can program request list of videos, facilitate the details of system searching associated video file simultaneously;
The hierarchical file that described video storage submodule generates for storing described video SVC coding submodule, and send hierarchical file to described video self adaptation adjusting module and carry out the extraction of layered video file.
In video on-demand system based on scalable coding under mobile environment of the present invention, described mobile terminal device parameter is screen display resolution.
In video on-demand system based on scalable coding under mobile environment of the present invention, described best code check is a maximal rate that guarantees under the prerequisite that can bear of the network bandwidth that mobile terminal device mobile terminal video does not block time.
In video on-demand system based on scalable coding under mobile environment of the present invention, the video information after described integration is video resolution information and video code rate information.
In video on-demand system based on scalable coding under mobile environment of the present invention, the video resolution that described applicable terminal shows is the immediate video resolution of screen display resolution with terminal equipment.
In video on-demand system based on scalable coding under mobile environment of the present invention, described source video sequence is local video and the video that crawls or download from the Internet, title, size, form, duration, resolution, code check, source and chained address that described source video sequence information is video.
In video on-demand system based on scalable coding under mobile environment of the present invention, the title that described hierarchical file relevant information is video, size, duration, resolution, code check, memory address, layering sum, corresponding resolution, code check and the frame per second of each layering.
Therefore, the present invention can obtain following beneficial effect: video source processing module generates the layered video file encoding, video on-demand request module feeds back to video self adaptation adjusting module by the device parameter of mobile terminal and the network condition of accepting data, video self adaptation adjusting module carries out the extraction of resolution or code check to layered video file on-demand according to feedback, the video file after extracting is sent to the mobile terminal broadcasting of decoding.So both consider mobile terminal device display resolution, considered again the network condition of mobile terminal, met the video on-demand request of different mobile terminals under heterogeneous networks situation; Video file is decoded to play can make user within the shortest start-up time, watch video, provide quick response and high-quality continual broadcasting service, and a video only need be encoded once can realize repeatedly and be shared, and has alleviated the calculating pressure of server, has saved memory space.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation block diagram of the video on-demand system based on scalable coding under mobile environment of the present invention;
Fig. 2 is the structure refinement block diagram of the video on-demand system based on scalable coding under mobile environment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.In addition,, in each execution mode of described the present invention, involved technical characterictic just can not combine mutually as long as do not form each other conflict.
Fig. 1 is the structural representation block diagram of the video on-demand system based on scalable coding under mobile environment of the present invention.As shown in Figure 1, video on-demand system based on scalable coding under mobile environment of the present invention comprises video on-demand request module 1, video self adaptation adjusting module 2 and video source processing module 3, video on-demand request module 1 is connected with video self adaptation adjusting module 2, video self adaptation adjusting module 2 is connected with video source processing module 3, and video source processing module 3 is connected with video on-demand request module 1.
The list of videos that video on-demand request module 1 is upgraded for receiver, video source processing module 3, when user has click behavior, produce the order request of video, and the processing and the response that send in real time video self adaptation adjusting module 2 to ask the order request that has comprised video name and mobile terminal parameter.Meanwhile, after the video data of receiver, video self adaptation adjusting module 2, carry out the real-time statistics of network condition, and by result feedback to video self adaptation adjusting module 2.
Video self adaptation adjusting module 2 is for order request and the network condition real-time statistics feedback result of receiver, video order request module 1 generation in real time, the resolution of video or code check are adjusted, and according to described adjustment parameter, the layered video file in video source processing module 3 is extracted, send to afterwards described video on-demand request module 1, the resolution information that adjustment parameter is video and the code rate information of video.
Video source processing module 3 can layered video encoding and decoding for access, preliminary treatment and the SVC(of video source) coding, and upgrade list of videos and facilitate video on-demand request module 1 to use, the hierarchical file that memory encoding is good extracts by adjusting parameter for video self adaptation adjusting module 2.
Fig. 2 is the structure refinement block diagram of the video on-demand system based on scalable coding under mobile environment of the present invention.As shown in Figure 2, video on-demand request module 1 comprises that the synchronous submodule 11 of list of videos, terminal parameter extract submodule 12, video request submodule 13, data buffer storage submodule 14 and network-feedback submodule 15;
The synchronous submodule 11 of list of videos can be for the list of videos of program request for generating on terminal equipment, and Data Source is the list of videos of upgrading in video source processing module 3, when user has program request behavior, sends video name to video request submodule 13;
Terminal parameter extracts submodule 12 for after user's program request video, extracts the device parameter of mobile terminal, and sends the parameter of extraction to video request submodule 13.In the present embodiment, the device parameter of mobile terminal mainly comprises screen display resolution;
Video request submodule 13 is for integrating the video name receiving from the synchronous submodule 11 of list of videos and extracting from terminal parameter the terminal parameter that submodule 12 receives, to video self adaptation adjusting module 2, send video on-demand request, meanwhile, to data buffer storage submodule 14, send the request that receives data;
The request of the reception data that data buffer storage submodule 14 sends for receiver, video request submodule 13, the video data that buffer memory video self adaptation adjusting module 2 sends over sends the size and the time used that receive data to network-feedback submodule 15 simultaneously;
Network-feedback submodule 15 is for the value with the Time Calculation network bandwidth used according to the video data size receiving from data buffer storage submodule 14, and this value is fed back to 2 confessions of video self adaptation adjusting module, and it carries out the adjustment of video code rate.
Video self adaptation adjusting module 2 comprises video request processing submodule 21, video resolution decision-making submodule 22, network monitor submodule 23, video code rate decision-making submodule 24, video parameter adjustment submodule 25 and video extraction submodule 26.
Video request is processed submodule 21 for the video on-demand request that receiver, video order request module 1 is sent in real time, and sends to video resolution decision-making submodule 22 to carry out the decision-making of video resolution for it information of terminal equipment parameter in request msg.In the present embodiment, the screen display resolution that terminal equipment parameter is mobile terminal device.
Video resolution decision-making submodule 22 is processed the terminal parameter of submodule 21 for receiver, video request, go out the video resolution of applicable terminal plays, and send to video parameter to adjust submodule 25 resolution information according to this Parameter Decision Making.In the present embodiment, the video resolution of applicable terminal plays for approaching most the video resolution of (be slightly larger than or be slightly less than) with the screen resolution of terminal equipment.
Network monitor submodule 23 is for the value of the network bandwidth that receiver, video order request module 1 is fed back in real time, thus the variation of monitoring mobile terminal network situation, and it carries out the decision-making of video code rate to send this value 24 confessions of to video code rate decision-making submodule.
Video code rate decision-making submodule 24 is for receiving the network bandwidth value of network monitor submodule 23, and according to this network broadband value decision-making, next will send to the best code check of user's video, sends to video parameter to adjust submodule 25 code rate information.In the present embodiment, best code check is (guarantee that mobile terminal video do not block time) maximum code check under the prerequisite that can bear in bandwidth.
Video parameter is adjusted submodule 25 for receiving, integrate from the video resolution information of video resolution decision-making submodule 22 and the video code rate information of video code rate decision-making submodule 24, and the video information after integrating is sent to video extraction submodule 26.
Video extraction submodule 26, for according to the video information of adjusting from video parameter the integration that submodule 25 receives, extracts the layered video file in video source processing module 3, form be applicable to that mobile terminal shows, play unbroken video.In the present embodiment, the video information after integration comprises the code rate information of resolution information and the video of video.
Video source processing module 3 comprises video source access submodule 31, video pre-filtering submodule 32, video SVC encode submodule 33, list of videos index submodule 34 and video storage submodule 35.
Video source access submodule 31 is used to whole system that source video sequence is provided, and comprises local video and the video that crawls or download from the Internet, and gives video pre-filtering submodule 32 by the relevant information of these source video sequences.In the present embodiment, the relevant information of source video sequence comprises title, size, form, duration, resolution, code check, source, the chained address of video.
Video pre-filtering submodule 32 is decoded as the most original data flow (yuv format) for video source being accessed to the video of submodule 31 according to video parameter, facilitates video SVC coding submodule 33 to carry out SVC coding.
Video SVC coding submodule 33 carries out SVC coding for the original data stream that video pre-filtering submodule 32 is handled well, generates hierarchical file.After encoding successfully, send hierarchical file to video storage submodule 35, the relevant information of hierarchical file is passed to list of videos index submodule 34.In the present embodiment, the relevant information of hierarchical file comprises title, size, duration, resolution, code check, memory address, layering sum, corresponding resolution, code check, the frame per second of each layering of video.
Index is preserved and set up to list of videos index submodule 34 for the hierarchical file relevant information that video SVC coding submodule 33 is transmitted, for video on-demand request module 1 generate can program request list of videos, meanwhile, facilitate the details of system searching associated video file.
The hierarchical file that video storage submodule 35 generates for store video SVC coding submodule 33, and send hierarchical file to video self adaptation adjusting module 2 and carry out the extraction of layered video.
When the video on-demand system based on scalable coding under mobile environment of the present invention is worked, first generate SVC hierarchical coding file: video source access submodule 31 is collected local video or from the Internet, crawls, downloads popular video, by the relevant information of these videos, gives video pre-filtering submodule 32.Video pre-filtering submodule 32 is decoded as the most original data flow by video according to video parameter, offers video SVC coding submodule 33.The original data stream that video SVC coding submodule 33 is handled video pre-filtering submodule 32 well carries out SVC coding, generates hierarchical file.After encoding successfully, send hierarchical file to video storage submodule 35, the relevant information of hierarchical file is passed to list of videos index submodule 34.Index is preserved and set up to the hierarchical file relevant information that list of videos index submodule 34 transmits video SVC coding submodule 33, for video on-demand request module 1 generate can program request list of videos, meanwhile, for whole video on-demand system provides the function of searching associated video file details.The hierarchical file that video storage submodule 35 store video SVC coding submodules 33 generate, and when having order request, send hierarchical file to video self adaptation adjusting module 2 and carry out the extraction of layered video file.By carrying out SVC coding, alleviated the pressure of server, saved the memory space of server, a video only need be encoded and once just can be realized repeatedly and sharing.
When user enters video on-demand system of the present invention, the synchronous submodule 11 of list of videos is according to the list of videos information of storage in video source processing module 3, and on mobile terminal device, generating can be for the list of videos of program request.
When user has program request behavior, the synchronous submodule 11 of list of videos sends video name to video request submodule 13, and terminal parameter extracts the device parameter that submodule 12 extracts mobile terminal simultaneously, sends the device parameter of extraction to video request submodule 13.Video request submodule 13 is integrated the video name receiving from the synchronous submodule 11 of list of videos and is extracted from terminal parameter the terminal parameter that submodule 12 receives, to video self adaptation adjusting module 2, send video on-demand request, meanwhile, to data buffer storage submodule 14, send the request that receives data.Video request is processed the video on-demand request that the real-time receiver, video request submodule 13 of submodule 21 sends, and the information of terminal equipment parameter in request msg is sent to video resolution decision-making submodule 22.The terminal equipment parameter in submodules 21 is processed in the 22 receiver, video requests of video resolution decision-making submodule, goes out the video resolution of applicable terminal plays, and send to video parameter to adjust submodule 25 resolution information according to this Parameter Decision Making.Video parameter is adjusted submodule 25 and is received the video resolution information of video resolution decision-making submodule 22 and send to video extraction submodule 26.Video extraction submodule 26 according to from video parameter, adjust that submodule 25 receives to video resolution information, layered video file in video storage submodule 35 is extracted according to resolution, the base layer data of the lowest bit rate under this resolution is sent to data buffer storage submodule 14, and data buffer storage submodule 14 can be play through decoding after receiving data.Like this, user can watch video in the shortest startup time delay, and basic layer can meet low-quality broadcasting demand simultaneously, takies broadband few, makes mobile terminal adapt to better the poor situation of network condition.
And then, data buffer storage submodule 14 sends the size of the above-mentioned data that receive and time used to network-feedback submodule 15.Network-feedback submodule 15 is the value with the Time Calculation network bandwidth used according to the video data size receiving from data buffer storage submodule 14, and this value is fed back to network monitor submodule 23.Network monitor submodule 23 receives the value of the network bandwidth of network-feedback submodule 15 feedbacks in real time, sends this value to video code rate decision-making submodule 24.Video code rate decision-making submodule 24 receives the network bandwidth value in network monitor submodules 23, next will send to the best code check of user's video according to this value decision-making, and code rate information is sent to video parameter adjustment submodule 25.Video parameter is adjusted submodule 25 and is received the video code rate information of video code rate decision-making submodule 24, and sends to video extraction submodule 26.Video extraction submodule 26 extracts according to code check the layered video file in video storage submodule 35 according to code rate information, layering subfile data under this code check are sent to data buffer storage submodule 14, and data buffer storage submodule 14 can be play through decoding after receiving data.Like this, both considered the equipment display resolution of mobile terminal, considered again the network condition of mobile terminal, the service of the biggest quality is provided in the situation that guaranteeing that video does not block time, utilized better broadband resource, thereby met the video on-demand request of different mobile terminals under heterogeneous networks situation, provide video-see not block and timed, lack the user's experience cushioning.
Those skilled in the art will readily understand; the foregoing is only preferred embodiment of the present invention; not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. the video on-demand system based on scalable coding under a mobile environment, described system comprises: video on-demand request module, video self adaptation adjusting module and video source processing module, described video on-demand request module is connected with described video self adaptation adjusting module, described video self adaptation adjusting module is connected with described video source processing module, described video source processing module is connected with described video on-demand request module, it is characterized in that
The list of videos that described video on-demand request module is upgraded for receiving described video source processing module, user produces video on-demand request while having program request behavior, and the processing and the response that send in real time described video self adaptation adjusting module to ask the order request that has comprised video name and mobile terminal device parameter; The video data that simultaneously receives described self adaptation adjusting module carries out the real-time statistics of network condition, and statistics is fed back to described video self adaptation adjusting module;
Video on-demand request and network condition real-time statistics result that described video self adaptation adjusting module produces for receiving described video on-demand request module, the resolution of video or code check are adjusted, and the video file in described video source processing module is sent to described video on-demand request module after adjusting parameter extraction;
Described video source processing module is for access, preliminary treatment and the SVC coding of video source, upgrade list of videos to facilitate described video on-demand request module to use, the layered video file that storage has been encoded extracts according to adjusting parameter for described video self adaptation adjusting module.
2. the video on-demand system based on scalable coding under mobile environment as claimed in claim 1, it is characterized in that, described video on-demand request module comprises that the synchronous submodule of list of videos, terminal parameter extract submodule, video request submodule, data buffer storage submodule and network-feedback submodule;
The synchronous submodule of described list of videos can be for the list of videos of program request for generating on mobile terminal device, Data Source is the list of videos of upgrading in described video source processing module, when user has program request behavior, send video name to described video request submodule;
Described terminal parameter extracts submodule for after the arbitrary video of user's program request, extracts the device parameter of mobile terminal, and sends the device parameter of extraction to described video request submodule;
Described video request submodule is for integrating the video name receiving from the synchronous submodule of described list of videos and the device parameter receiving from described terminal parameter submodule, to described video self adaptation adjusting module, send video on-demand request, meanwhile, to described data buffer storage submodule, send the request that receives data;
Described data buffer storage submodule is for receiving the request of the reception data that described video request submodule sends, described in buffer memory, video self adaptation adjusting module sends over according to the layered video file of having encoded of adjusting after parameter extraction, sends the size of described video file and time used to described network-feedback submodule simultaneously;
Described network-feedback submodule is for the value with Time Calculation network broadband used according to the video data size receiving from described data buffer storage submodule, and this value is fed back to described video self adaptation adjusting module for it, carries out the adjustment of video code rate.
3. the video on-demand system based on scalable coding under mobile environment as claimed in claim 1 or 2, it is characterized in that, described video self adaptation adjusting module comprises video request processing submodule, video resolution decision-making submodule, network monitor submodule, video code rate decision-making submodule, video parameter adjustment submodule and video extraction submodule;
Described video request is processed submodule for receiving in real time the video on-demand request that described video on-demand request module is sent, and sends to described video resolution decision-making submodule to carry out the decision-making of video resolution for it information of device parameter in request msg;
Described video resolution decision-making submodule is processed the device parameter of submodule for receiving described video request, according to device parameter, decision-making goes out the video resolution of applicable terminal plays, and video resolution information is sent to described video parameter adjusts submodule;
Described network monitor submodule is for receiving in real time the value of the network broadband of described video on-demand request module feedback, thereby the variation of monitoring mobile terminal device mobile terminal network situation, and it carries out the decision-making of video code rate to send the value of network broadband to described video code rate decision-making submodule confession;
Described video code rate decision-making submodule, for receiving the value of described network monitor submodule network broadband, sends to the best code check of user's video according to the value decision-making of network broadband, video code rate information is sent to described video parameter and adjusts submodule;
Described video parameter is adjusted submodule for receiving, integrate from the video resolution information of described video resolution decision-making submodule and from the video code rate information of described video code rate decision-making submodule, and the video information after integrating is sent to described video extraction submodule;
Video information the integration that described video extraction submodule receives from described video parameter adjustment submodule for basis, layered video file in described video source processing module is extracted, form to be applicable to that mobile terminal device shows, play continuous video.
4. the video on-demand system based on scalable coding under mobile environment as claimed in claim 1 or 2, it is characterized in that, described video source processing module comprises video source access submodule, video pre-filtering submodule, video SVC encode submodule, list of videos index submodule and video storage submodule;
Described video source access submodule is used to described video on-demand system that source video sequence is provided, and source video sequence information is sent to described video pre-filtering submodule;
Described video pre-filtering submodule is the data flow of the most original yuv format for the video-information decoding that described video access submodule is sent;
Described video SVC coding submodule is for carrying out described data flow SVC coding generating video hierarchical file, hierarchical file is sent to described video storage submodule after encoding successfully, sends hierarchical file relevant information to described list of videos index submodule;
Index is preserved and set up to described list of videos index submodule for the hierarchical file relevant information that described video SVC coding submodule is transmitted, for described video on-demand request module generate can program request list of videos, facilitate the details of system searching associated video file simultaneously;
The hierarchical file that described video storage submodule generates for storing described video SVC coding submodule, and send hierarchical file to described video self adaptation adjusting module and carry out the extraction of layered video file.
5. the video on-demand system based on scalable coding under mobile environment as claimed in claim 1, is characterized in that, described mobile terminal device parameter is screen display resolution.
6. the video on-demand system based on scalable coding under mobile environment as claimed in claim 3, is characterized in that, described best code check is a maximal rate that guarantees under the prerequisite that can bear of the network bandwidth that mobile terminal video does not block time.
7. the video on-demand system based on scalable coding under mobile environment as claimed in claim 3, is characterized in that, the video information after described integration is video resolution information and video code rate information.
8. the video on-demand system based on scalable coding under mobile environment as claimed in claim 3, is characterized in that, the video resolution that described applicable terminal shows is the immediate video resolution of screen display resolution with terminal equipment.
9. the video on-demand system based on scalable coding under mobile environment as claimed in claim 4, it is characterized in that, described source video sequence is local video and the video that crawls or download from the Internet, title, size, form, duration, resolution, code check, source and chained address that described source video sequence information is video.
10. the video on-demand system based on scalable coding under mobile environment as claimed in claim 4, it is characterized in that the title that described hierarchical file relevant information is video, size, duration, resolution, code check, memory address, layering sum, corresponding resolution, code check and the frame per second of each layering.
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