CN101997872B - Method for reducing transmit jitter of code streams of streaming media and streaming media server - Google Patents
Method for reducing transmit jitter of code streams of streaming media and streaming media server Download PDFInfo
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- CN101997872B CN101997872B CN201010514757.4A CN201010514757A CN101997872B CN 101997872 B CN101997872 B CN 101997872B CN 201010514757 A CN201010514757 A CN 201010514757A CN 101997872 B CN101997872 B CN 101997872B
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Abstract
The invention relates to a method for reducing the transmit jitter of code streams of a streaming media and a streaming media server, wherein the method comprises the following steps: reading the media data of a video from an external media storage device; carrying out analysis processing on the media data, and packing the media data into real time protocol (RTP)-format media data packets, then putting a plurality of simultaneously-sent media data packets into a transmit box, and setting the transmit time stamp of the transmit box, wherein the transmit box is applied from a transmit-box idle administration queue in advance; adding the transmit box into the transmit queue, and sending the media data packets in the transmit box to a transit network; and recycling the transmit box to the transmit-box idle administration queue. In the invention, the problem that the transmit jitter of code streams is large and the DF value is unstable when the streaming media server simultaneously serves a large number of users is sloved, the stable transmit of code streams of a streaming media is realized, the video quality is enhanced, and the effect of user experience is promoted.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of method and streaming media server that stream media code stream sends shake that reduce.
Background technology
IPTV (Internet Protocol Television, Web TV) refers to the TV broadcasting service of IP based network.IPTV can provide various Video service, comprise live, program request, carousel, time shift, review etc., wherein, program request, time shift, the business of reviewing are as the basic service of IPTV, for seeing TV, user provides the mode of watching more freely, user can at any time, selectively watch the TV programme of oneself liking, has greatly improved user's experience effect, has liberated the constraint of traditional tv to user.
Program request, time shift and to review these three kinds of basic services be all to initiate video playback request by user, adopted the mode of unicast of point-to-point by streaming media server, media data sent in user's Set Top Box, afterwards, by playing after set top box decodes.In transmitting procedure, delay factor (the DelayFactor of media data, DF) final video quality is had to great impact, when DF value surpasses the media data amount that the network equipment and decoder buffer can hold, to there is the phenomenons such as card or mosaic in video, reduced user's experience effect.
In actual networking, a streaming media server will be served a large amount of users simultaneously, therefore when server load is larger, there is larger fluctuation in the moment that sends code stream, cause code stream delivery time inaccurate, it is large that DF value becomes, thereby cause video playing quality to decline.
Summary of the invention
Main purpose of the present invention is to provide a kind of method and streaming media server that stream media code stream sends shake that reduce, and is intended to reduce stream media code stream and sends shake, improves video quality.
The present invention proposes a kind of method that stream media code stream sends shake that reduces, and comprising:
From foreign medium memory device, read the media data of video;
Described media data is carried out to analytic operation and process the media data packet that is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Described transmission box is added to transmit queue, and according to described scheduled time stamp, the media data packet in described transmission box is sent to transmission network;
Reclaim described transmission box to the idle administration queue of described transmission box.
Preferably, described transmission box comprises: data packet buffer and transmission handle.
Preferably, described media data is carried out to the media data packet that analyzing and processing is packaged into RTP form, a plurality of media data packet that same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the step that the predetermined transmitting time stamp that sends box is set comprises:
From the idle administration queue of described transmission box, apply for that sends a box;
The timestamp search of carrying according to described media data needs the media data sending at one time;
The described media data sending that needs is at one time packaged into media data packet according to RTP form;
Described media data packet is put into the data packet buffer of the transmission box of application, and the predetermined transmitting time stamp of described transmission box is set.
Preferably, describedly by sending box, add the step of transmit queue to comprise:
Transmission handle call operation system function according in described transmission box, adds described transmission box in transmit queue.
Preferably, the step of putting into the transmission box of applying for from the idle administration queue of transmission box in advance described in also comprises before:
Judge whether described media data packet transmitting time is later than predetermined transmitting time stamp, if not, carry out the step of described media data packet being put into the transmission box of applying for from the idle administration queue of transmission box in advance.
The present invention also proposes a kind of streaming media server that stream media code stream sends shake that reduces, and comprising:
Media data read module, for reading the media data of video from foreign medium memory device;
Media data analyzing processing module, for described media data is carried out to the media data packet that analyzing and processing is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Media data sending module, for described transmission box is added to transmit queue, and is sent to transmission network according to described predetermined transmitting time stamp by the media data packet in described transmission box;
Send box recycling module, for reclaiming described transmission box to the idle administration queue of described transmission box.
Preferably, described media data analyzing processing module comprises:
Send box application unit, for applying for that from the idle administration queue of described transmission box sends a box;
Media data search unit, needs for the timestamp search of carrying according to described media data the media data sending at one time;
Media data packaged unit, for being packaged into media data packet by the described media data sending that needs at one time by RTP form;
Media data placement unit, for described media data packet being put into the data packet buffer of the transmission box of application, and arranges the predetermined transmitting time stamp of described transmission box.
Preferably, described media data sending module also for: the transmission handle call operation system function according to described transmission box, adds described transmission box in transmit queue.
Preferably, described media data analyzing processing module also comprises:
Judging unit, be connected between described media data packaged unit and media data placement unit, be used for judging whether described media data packet transmitting time is later than predetermined transmitting time stamp, if not, by described media data placement unit, described media data packet is put into the transmission box of applying for from sending the idle administration queue of box in advance.
The present invention proposes a kind of method and streaming media server that stream media code stream sends shake that reduce, by the media data reading from foreign medium memory device is carried out analyzing and processing, the media data packet that is packaged into RTP form is put into and is sent box and be sent to transmission network by predetermined transmitting time stamp, having solved streaming media server serves at the same time a large number of users code stream and sends that shake is large, the jiggly problem of DF value, having realized media code levelling surely sends, promote video quality, improve user's experience effect.
Accompanying drawing explanation
Fig. 1 is that the present invention reduces the method one embodiment schematic flow sheet that stream media code stream sends shake;
Fig. 2 is that the present invention reduces and in method one embodiment that stream media code stream sends shake, media data carried out to analytic operation and process the media data packet that is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the schematic flow sheet of the predetermined transmitting time stamp that sends box is set;
Fig. 3 is that the present invention reduces another embodiment schematic flow sheet of method that stream media code stream sends shake;
Fig. 4 is that the present invention reduces the streaming media server one example structure schematic diagram that stream media code stream sends shake;
Fig. 5 is that the present invention reduces media data analyzing processing module one execution mode structural representation in streaming media server one embodiment that stream media code stream sends shake;
Fig. 6 is that the present invention reduces another execution mode structural representation of media data analyzing processing module in streaming media server one embodiment that stream media code stream sends shake.
In order to make technical scheme of the present invention clearer, clear, below in conjunction with accompanying drawing, be described in further detail.
Embodiment
Solution for embodiment of the invention is mainly by the media data reading from foreign medium memory device is carried out analyzing and processing, is packaged into media data packet and puts into transmission box, is sent on schedule transmission network.
As shown in Figure 1, one embodiment of the invention proposes a kind of method that stream media code stream sends shake that reduces, and comprising:
Step S101 reads the media data of video from foreign medium memory device;
Step S102, media data is carried out to analytic operation and process the media data packet that is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
The present embodiment method realizes based on (SuSE) Linux OS, specifically by (SuSE) Linux OS application layer program and driver, is completed, and it relates to streaming media server, and the functional module comprising has: media data transmission apparatus and transmission box recycling module etc.As mentioned above, IPTV can provide various Video service for user, when user initiates video playback request, by streaming media server, media data is sent in user's Set Top Box by transmission network.
In the present embodiment, in order to solve streaming media server, serve a large number of users code stream transmission shake greatly simultaneously, the problem that causes video playing quality to decline, before media data is sent to transmission network, the media data reading from foreign medium memory device is carried out to analytic operation processing, media data after processing is packed, obtain the media data packet of RTP form, a plurality of media data packet that the same time sends are put into the transmission box of pre-first to file, and the predetermined transmitting time that transmission box is set is stabbed, so that media data transmission apparatus is regularly sent to transmission network by the media data packet sending in box according to the predetermined transmitting time stamp that sends box in streaming media server.
The transmission box of the present embodiment comprises data packet buffer and transmission handle, and wherein, data packet buffer is when a plurality of user's synchronizations will send media data packet, from operating system memory, dynamically applies for; The Socket handle that transmission handle is operating system, the type of this transmission handle drives and is associated with media data transmission apparatus, and operating system, when creating transmission box, can be bound for it Socket handle of an establishment.
Step S103, adds transmit queue by transmission box, and according to predetermined transmitting time stamp, the media data packet sending in box is sent to transmission network;
In the present embodiment, according to the transmission handle call operation system function sending in box, by sending box, join in the transmit queue of media data transmission apparatus.
In specific implementation process, when media data being carried out to analytic operation processing, by timer, trigger and realize, after timer arrives, from send box free time administration queue, apply for that sends a box; Then circulation timing on streaming media server according to all media datas that will send after such as 30 milliseconds in some moment of the timestamp search of media data, according to the media data form of giving out a contract for a project, be packaged into media data packet, these media data packet are put into this packet buffering list of above-mentioned transmission box, according to the timestamp of media data packet, for sending box, be set the moment that will be sent out again, then according to the Socket handle call operation system function sending in box, by sending box, join in the transmit queue of media data transmission apparatus; Meanwhile, the Socket handle of this transmission box is joined during the Select that sends box recycling module intercepts.
Media data transmission apparatus is provided with Abort Timer, after the Abort Timer of media data transmission apparatus arrives, media data transmission apparatus checks the transmission box in transmit queue, if found transmission box to send at current time, takes out this transmission box.Media data transmission apparatus is taken out all media data packet from send box, sends into successively in the network interface card of media data transmission apparatus management, by network interface card, media data packet is sent in transmission network.
Step S104, reclaims and sends box to sending the idle administration queue of box.
After media data transmission apparatus is sent completely the media data packet in transmission box, the media data packet that sends box recycling module transmission box by sending the Socket handle notice of box is sent completely.
Sending box recycling module from system call Select handle wakes up, the data packet buffer in the transmission box listening to and Socket handle are being reclaimed.Then by sending box recycling module, the data packet buffer of recovery and Socket handle are joined to the idle administration queue of transmission box, to send follow-up media data.
The present embodiment is in order to improve system effectiveness, and the interactive operation between above steps all adopts asynchronous system to carry out.Driver is according to interrupting accurate poll transmit queue, at the network card equipment of operations flows media server constantly accurately, thereby by Packet Generation in transmission network.
In the present embodiment, media data transmission apparatus adopts Linux driver mode to realize, and its timer adopts operating system interrupt mode to trigger, even in the situation that operating system load is larger, also can guarantee the triggering precision of timer.Therefore can send in transmission network constantly shifting to an earlier date ready media data packet very accurately, collateral security the accuracy of video code flow delivery time, reach and reduce media give out a contract for a project shake, the level and smooth object of DF value.
As shown in Figure 2, step S102 comprises:
Step S1021 applies for a transmission box from send the idle administration queue of box;
Step S1022, the timestamp carrying according to media data search needs the media data sending at one time;
Step S1023, will need the media data sending to be packaged into media data packet by RTP form at one time;
Step S1024, puts into media data packet the data packet buffer of the transmission box of application, and the predetermined transmitting time stamp that sends box is set.
As shown in Figure 3, another embodiment of the present invention proposes a kind of method that stream media code stream sends shake that reduces, and comprising:
Step S301 reads the media data of video from foreign medium memory device;
Step S302, carries out analytic operation to media data and processes the media data packet that is packaged into RTP form;
Step S303, judges that whether media data packet transmitting time is later than predetermined transmitting time stamp, if not, enters step S304; If so, enter step S307;
Step S304, puts into media data packet in the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Step S305, adds transmit queue by transmission box, and according to predetermined transmitting time stamp, the media data packet sending in box is sent to transmission network;
Step S306, reclaims and sends box to sending the idle administration queue of box.
Step S307, does not put into media data packet the transmission box of applying for from sending the idle administration queue of box in advance.
In the present embodiment, above-mentioned steps S301, step S305 and step S306 are corresponding identical successively with step S301, step S303 in above-described embodiment and step S304, do not repeat them here.
Wherein, above-mentioned steps S302, step S303, in step S304 and step S307, before media data packet being put into transmission box, whether the actual transmitting time that need to judge this media data packet is later than predetermined transmitting time stamp, if the actual transmitting time of media data packet is later than predetermined transmitting time stamp, no longer this media data packet being put into transmission box sends, that is to say, the rise time that is placed with the transmission box of media data packet is always wanted Zao could transmission than the actual delivery time of media data packet, to improve system effectiveness and user's experience effect.
As shown in Figure 4, one embodiment of the invention proposes a kind of streaming media server that stream media code stream sends shake that reduces, comprise: media data read module 401, media data analyzing processing module 402, media data sending module 403 and transmission box recycling module 404, wherein:
Media data read module 401, for reading the media data of video from foreign medium memory device;
Media data analyzing processing module 402, for media data being carried out to analytic operation, process the media data packet that is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Media data sending module 403, for transmission box is added to transmit queue, and is sent to transmission network according to predetermined transmitting time stamp by the media data packet sending in box;
In the present embodiment, media data sending module 403, according to the transmission handle call operation system function sending in box, adds transmission box in transmit queue.
Send box recycling module 404, for reclaiming, send box to sending the idle administration queue of box.
Above-mentioned media data read module 401, media data analyzing processing module 402 and transmission box recycling module 404, be the internal module of Streaming Media software, is controlled by operating system application layer program; Media data sending module 403 can be media data transmission apparatus in the present embodiment system, the driver that is controlled by operating system, media data sending module 403 is according to interrupting accurate poll transmit queue, accurately constantly the network card equipment of operations flows media server media data packet is sent in transmission network.
In the present embodiment, in order to solve streaming media server, serve a large number of users code stream transmission shake greatly simultaneously, the problem that causes video playing quality to decline, before media data is sent to transmission network, the media data reading from foreign medium memory device by 402 pairs of media data read modules 401 of media data analyzing processing module carries out analytic operation processing, media data after processing is packed, obtain RTP format media packet, a plurality of media data packet that the same time sends are put into the transmission box of pre-first to file, so that media data sending module 403 is regularly sent to transmission network by transmission box according to the predetermined transmitting time stamp that sends box.
In specific implementation process, when 402 pairs of media datas of media data analyzing processing module carry out analytic operation processing, by timer, triggered, after timer arrives, from send the idle administration queue of box, apply for that sends a box, then circulation timing on streaming media server according to all media datas that will send after such as 30 milliseconds in some moment of the timestamp search of media data, according to the media data form of giving out a contract for a project, be packaged into media data packet, these media data packet are put into this packet buffering list of above-mentioned transmission box, according to the predetermined transmitting time stamp of media data packet, for sending box, be set the moment that will be sent out again, then according to the Socket handle call operation system function sending in box, by sending box, join in the transmit queue of media data transmission apparatus, meanwhile, the Socket handle of this transmission box is joined during the Select that sends box recycling module intercepts.
Media data transmission apparatus is provided with Abort Timer, after the Abort Timer of media data transmission apparatus arrives, media data transmission apparatus checks the transmission box in transmit queue, if found transmission box to send at current time, takes out this transmission box.Media data transmission apparatus is taken out all media data packet from send box, sends into successively in the network interface card of media data transmission apparatus management, by network interface card, media data packet is sent in transmission network.
After media data transmission apparatus is sent completely the media data packet in transmission box, by sending the Socket handle of box, with asynchronous message, notify the media data packet that sends box recycling module 404 transmission boxes to be sent completely.
Send box recycling module 404 and receive that this asynchronous message is from system call Select handle wakes up, the data packet buffer in the transmission box listening to and Socket handle are reclaimed.Then by sending box recycling module 404, the data packet buffer of recovery and Socket handle are joined to the idle administration queue of transmission box, to send follow-up media data.
The present embodiment is in order to improve system effectiveness, and the interactive operation between above-mentioned each functional module all adopts asynchronous system to carry out.Driver is according to interrupting accurate poll transmit queue, at the network card equipment of operations flows media server constantly accurately, thereby by Packet Generation in transmission network.
In the present embodiment, media data transmission apparatus adopts Linux driver mode to realize, and its timer adopts operating system interrupt mode to trigger, even in the situation that operating system load is larger, also can guarantee the triggering precision of timer.Therefore can send in transmission network constantly shifting to an earlier date ready media data packet very accurately, collateral security the accuracy of video code flow delivery time, reach and reduce media give out a contract for a project shake, the level and smooth object of DF value.
As shown in Figure 5, media data analyzing processing module 402 comprises: send box application unit 4021, media data search unit 4022, media data packaged unit 4023 and media data placement unit 4024, wherein:
Send box application unit 4021, for applying for a transmission box from sending the idle administration queue of box;
Media data search unit 4022, needs for the timestamp search of carrying according to media data the media data sending at one time;
Media data packaged unit 4023, for needing at one time the media data sending to be packaged into media data packet by RTP form;
Media data placement unit 4024, for media data packet being put into the data packet buffer of the transmission box of application, and arranges the predetermined transmitting time stamp that sends box.
As shown in Figure 6, in the another kind of execution mode as the present embodiment, media data analyzing processing module 402 also can comprise:
Judging unit 40234, be connected between media data packaged unit 4023 and media data placement unit 4024, be used for judging whether media data packet transmitting time is later than predetermined transmitting time stamp, if not, by media data placement unit 4024, media data packet is put into the transmission box of applying for from sending the idle administration queue of box in advance.
In the present embodiment, before media data packet being put into transmission box, whether the actual transmitting time that need to judge this media data packet is later than the scheduled time, if the actual transmitting time of media data packet is later than the scheduled time, no longer this media data packet being put into transmission box sends, that is to say, the rise time that is placed with the transmission box of media data packet is always wanted Zao could transmission than the actual delivery time of media data packet, to improve system effectiveness and user's experience effect.
The embodiment of the present invention reduces method and the streaming media server that stream media code stream sends shake, by the media data reading from foreign medium memory device is carried out analyzing and processing, the media data packet that is packaged into RTP form is put into and is sent box and be sent to transmission network by predetermined transmitting time stamp, having solved streaming media server serves at the same time a large number of users code stream and sends that shake is large, the jiggly problem of DF value, having realized media code levelling surely sends, promote video quality, improve user's experience effect.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or flow process conversion that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. reduce the method that stream media code stream sends shake, it is characterized in that, comprising:
From foreign medium memory device, read the media data of video;
Described media data is carried out to the media data packet that analyzing and processing is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Described transmission box is added to transmit queue, and according to described predetermined transmitting time stamp, the media data packet in described transmission box is sent to transmission network;
Reclaim described transmission box to the idle administration queue of described transmission box.
2. method according to claim 1, is characterized in that, described transmission box comprises: data packet buffer and send handle.
3. method according to claim 2, it is characterized in that, described media data is carried out to the media data packet that analyzing and processing is packaged into RTP form, a plurality of media data packet that same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the step that the predetermined transmitting time stamp that sends box is set comprises:
From the idle administration queue of described transmission box, apply for that sends a box;
The timestamp search of carrying according to described media data needs the media data sending at one time;
The described media data sending that needs is at one time packaged into media data packet by RTP form;
Described media data packet is put into the data packet buffer of the transmission box of application, and the predetermined transmitting time stamp of described transmission box is set.
4. method according to claim 3, is characterized in that, describedly by sending box, adds the step of transmit queue to comprise:
Transmission handle call operation system function according in described transmission box, adds described transmission box in transmit queue.
5. according to method described in any one in claim 1-4, it is characterized in that, described in put in advance before sending the step of the transmission box that the idle administration queue of box applies for and also comprise:
Judge whether described media data packet transmitting time is later than predetermined transmitting time stamp, if not, carry out the step of described media data packet being put into the transmission box of applying for from the idle administration queue of transmission box in advance.
6. reduce the streaming media server that stream media code stream sends shake, it is characterized in that, comprising:
Media data read module, for reading the media data of video from foreign medium memory device;
Media data analyzing processing module, for described media data is carried out to the media data packet that analyzing and processing is packaged into RTP form, a plurality of media data packet that the same time sends are put into the transmission box of applying for from sending the idle administration queue of box in advance, and the predetermined transmitting time stamp that sends box is set;
Media data sending module, for described transmission box is added to transmit queue, and is sent to transmission network according to described predetermined transmitting time stamp by the media data packet in described transmission box;
Send box recycling module, for reclaiming described transmission box to the idle administration queue of described transmission box.
7. streaming media server according to claim 6, is characterized in that, described media data analyzing processing module comprises:
Send box application unit, for applying for that from the idle administration queue of described transmission box sends a box;
Media data search unit, needs for the timestamp search of carrying according to described media data the media data sending at one time;
Media data packaged unit, for being packaged into media data packet by the described media data sending that needs at one time by RTP form;
Media data placement unit, for described media data packet being put into the data packet buffer of the transmission box of application, and arranges the predetermined transmitting time stamp of described transmission box.
8. streaming media server according to claim 6, is characterized in that, described media data sending module also for: the transmission handle call operation system function according to described transmission box, adds described transmission box in transmit queue.
9. according to the streaming media server described in claim 7 or 8, it is characterized in that, described media data analyzing processing module also comprises:
Judging unit, be connected between described media data packaged unit and media data placement unit, be used for judging whether described media data packet transmitting time is later than predetermined transmitting time stamp, if not, by described media data placement unit, described media data packet is put into the transmission box of applying for from sending the idle administration queue of box in advance.
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| CN102802041B (en) * | 2012-08-06 | 2015-01-14 | 何建亿 | Implement method for intelligent streaming media server supporting a plurality of real-time dynamic data sources |
| CN110430208B (en) * | 2019-08-13 | 2022-02-18 | 四川东方网力科技有限公司 | Video stream processing method and device, electronic equipment and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101009685A (en) * | 2006-01-23 | 2007-08-01 | 中兴通讯股份有限公司 | A stream media playing system |
| CN101022537A (en) * | 2006-12-15 | 2007-08-22 | 清华大学 | Free viewpoint video IP network transmission method based on light field exaggerate |
| CN101448006A (en) * | 2008-12-25 | 2009-06-03 | 中兴通讯股份有限公司 | Method and system for realizing access for a great amount of terminals for helix server |
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| US20090190582A1 (en) * | 2008-01-30 | 2009-07-30 | Texas Instruments Incorporated | System and method for streaming media in master or slave mode with ease of user channel configuration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101009685A (en) * | 2006-01-23 | 2007-08-01 | 中兴通讯股份有限公司 | A stream media playing system |
| CN101022537A (en) * | 2006-12-15 | 2007-08-22 | 清华大学 | Free viewpoint video IP network transmission method based on light field exaggerate |
| CN101448006A (en) * | 2008-12-25 | 2009-06-03 | 中兴通讯股份有限公司 | Method and system for realizing access for a great amount of terminals for helix server |
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