CN101212647B - Two-way HFC network based stream media service implementation method and device - Google Patents
Two-way HFC network based stream media service implementation method and device Download PDFInfo
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Abstract
The invention provides a method for realizing streaming media service based on an HFC bidirectional network and a device thereof, which belongs to a transmission technology field of digital information. The method comprises the steps: interactive processing of video-on-demand and streaming service of audio-video data are separated; the audio-video data is realized by adopting an MPEG-2 TS specification; an RTSP protocol in an ISMA specification is introduced, thereby standardizing flow of the video-on-demand; uplink and downlink of the RTCP control protocol are separated, which means that the uplink is transmitted by using a bidirectional channel and the downlink is encapsulated in private data of a TS and is transmitted by using a broadcasting channel; combination of QoS information communication function of the RTCP can realize effective monitor of utilization of spectrum resources, thus the video-on-demand service can be effectively developed in the HFC bidirectional network; reliable management of bandwidth can be realized and reliable service safeguard is provided for the user.
Description
Technical field
The present invention relates to the transmission technique field of digital information, relate in particular to a kind of streaming media service implementation method and equipment based on the HFC bilateral network.
Background technology
Stream media technology is the product that network technology and multimedia technology develop into certain phase, IPTV (Internet Protocol Television, be called for short Web TV), utilize stream media technology to pass through the broadband network transmitting digital TV signal exactly and give the user, thereby provide the multiple interactive services that comprises Digital Television to the user, subscriber terminal equipment can be a computer, also can be TV+STB (television set+set-top box).
At present, the IPTV operation that telecom operators provide is online at the manageable IP (Internet protocol) that supports multicast, and its main business is live telecast, time-moving television, VOD (video request program) and interactive information service etc.This class video on-demand system adopts the Streaming Media control protocol to realize usually, for example can adopt RTP/RTCP/RTSP (RTP/RTCP Real-time Transport Control Protocol/real-time streaming protocol).
For the TV service of high definition is provided to the user, the radio network of cable digital TV can adopt HFC (Hybrid Fiber Coaxial) network architecture, promptly, adopt optical fiber to make transmission main line, as shown in Figure 1, be existing video on-demand system schematic diagram based on hfc plant, make access medium by coaxial cable among the figure, convert vision signal to light signal at Headend with optical sender, be transferred to the optical receiver of Serving cell then with optical fiber, with its reception and convert the signal of telecommunication to, be transferred to the user with the coaxial cable net by optical receiver again.
Introduce existing interaction flow based on the hfc plant video request program below, as shown in Figure 2, concrete steps are as follows:
Step 21, video server broadcasting menu and system information;
Step 22, user have chosen the VOD program when choice menus, STB applies for ascending time slot, and utilize the time slot that is assigned to request to be sent to the access server of front end;
Step 23, access server are handled user's the LIST SERVER of giving for information about, if system also has the VOD resource, then notify video server to play on the one hand, on the other hand resource information is broadcasted by the downlink system data link, adjusted to specific channel with the announcement machine top box and remove receiver, video stream;
Step 24, in the process that video flowing is play, system sends probe (probe) signal at set intervals and gives online set-top box, is carrying out video decode to confirm set-top box always, prevents that power down etc. is improper former thereby cause unnecessary dispute;
Step 25, finish, video server can and LIST SERVER carry out alternately, the information that finishes of LIST SERVER broadcast playback is to set-top box at this moment, set-top box is got back to nearest menu.
HFC is the main pattern that the current cable network digitalization is transformed.Original 550MHzCATV (cable TV) net expands to the HFC two-way catv net of 750MHz, and wherein 5～42MHz is used for up channel, and high-end 200MHz adopts the MPEG-2TS standard as downstream data flow in the transmission of down channel.
From the above mentioned, can find that there is following at least problem in prior art:
In hfc plant, though enjoy a coaxial cable jointly by a plurality of users, the spectrum allocation may of downlink transfer is not controlled effectively, causes the video request program pattern of IP network and not exclusively is applicable to two-way hfc plant.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of streaming media service implementation method and equipment based on the HFC bilateral network, makes it possess complete VOD method.
The embodiment of the invention provides a kind of streaming media service implementation method based on the HFC bilateral network, and described method comprises:
In the HFC bilateral network, realize the video request program operation by the stream media protocol RTSP in the ISMA of the internet stream media alliance standard, and in realizing described video request program operating process, by the up two-way channel transmission information of utilizing of RTCP Real-time Transport Control Protocol RTCP control, the descending broadcast channel transmission information of utilizing is to realize the separation of uplink and downlink transmission.
The embodiment of the invention also provides a kind of equipment of realizing based on the streaming media service of HFC bilateral network, comprises,
The uplink processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the up two-way channel transmission information of utilizing of rtcp protocol control;
The downlink transfer processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the descending broadcast channel transmission information of utilizing of rtcp protocol control.
By technique scheme as can be seen, when on embodiment of the invention hfc plant, carrying out VOD service, the interaction process of separating video program request and the service of audio, video data fluidisation, adopt the MPEG-2TS standard to realize audio, video data, by RTSP (real-time streaming protocol) the consensus standard video request program flow process in ISMA (internet stream media alliance) standard, simultaneously in order to adapt to the asymmetric transmission restriction of hfc plant up-downgoing, the up-downgoing transmission of RTCP (RTCP Real-time Transport Control Protocol) control protocol can be separated, be about to the up two-way channel transmission that utilizes, utilize the broadcast channel transmission in the private data with the descending TS of being encapsulated in (transport stream), and QoS (service quality) communication function in conjunction with RTCP, can realize effective control to frequency spectrum resource utilization rate, thereby can in the HFC bilateral network, carry out VOD service effectively, and realization bandwidth management, for the user provides reliable service, simultaneously owing to the embodiment of the invention realizes based on the existing standard agreement, so be fit to third party's expansion.
Description of drawings
Fig. 1 is existing video on-demand system schematic diagram based on hfc plant;
Fig. 2 is existing reciprocal process schematic diagram based on the hfc plant video request program;
Fig. 3 is an embodiment of the invention video request program flow process schematic diagram;
Fig. 4 is an embodiment of the invention stream media server system configuration diagram.
Embodiment
When the embodiment of the invention is carried out VOD service on hfc plant, the interaction process of separating video program request and the service of audio, video data fluidisation, adopt the MPEG-2TS standard to realize audio, video data, by the RTSP consensus standard video request program flow process in the ISMA standard, simultaneously in order to adapt to the asymmetric transmission restriction of hfc plant up-downgoing, the up-downgoing transmission of RTCP control protocol can be separated, be about to the up two-way channel transmission that utilizes, utilize the broadcast channel transmission in the private data with the descending TS of being encapsulated in, and, realize effective control to frequency spectrum resource utilization rate in conjunction with the QoS communication function of RTCP.
In order to make streaming media service possess complete program request scheme based on the HFC bilateral network, thereby can in the HFC bilateral network, carry out VOD service effectively, a kind of video request program flow process is provided in embodiments of the present invention, and as shown in Figure 3, concrete steps are as follows:
In step 31, the STB connection after the hfc plant, detect the wheel of IPQAM (edge modulator) and broadcast information, and utilize two-way channel, the above-mentioned IPQAM sign of broadcasting the information correspondence of taking turns is returned to SRM (session management server), and this user's information is recorded in the SRM database, and execution in step 32 then.
Step 32, judge whether SRM has available resources, if having, then SRM to STB return IPQAM the receiving terminal parameter (IP, Port) and downstream parameter (frequency, symbol rate, QAMVPID, QAMAPID, ...) and the parameter of VS-Manager (IP, Port); Otherwise, return the resource allocation failure and give STB.Simultaneously, SRM identifies this resource and is temporarily distributed, and execution in step 33 then.
Step 33, STB carry IPQAM the receiving terminal parameter (IP, Port) and the programme information of program request (contentID ...) to VS-Manager request film resource.If VS can be STB the film resource is provided, then return the URL (URL(uniform resource locator)) of the corresponding program request of film resource, similar rtsp: //IP address/SessionID_string/ContentID form; Otherwise, return failed message.VS returns the not successful message of this time program request to SRM simultaneously.SRM discharges the resource mark of correspondence, and execution in step 34 then.
Step 34, STB pass through two-way channel, and use standard RTSP agreement is carried out program request control, and the frequency in appointment carries out reception of TS stream and broadcast simultaneously.After the program request success, VS sends the session success message to SRM, and it is occupied that SRM indicates this resource.
Step 35, if STB program request flow process finishes, STB sends the RTSP message that program request finishes to VS.VS stops the transmission of program stream after confirming to finish, and sends the message that resource discharges to SRM simultaneously.
STB in the above-mentioned steps adopts the short connected mode of TCP with communicating by letter of SRM and VS-Manager, can realize privately owned message, and utilizes the two-way channel transmission.STB realizes with the standard of the employing RTSP agreement of communicating by letter of VS-VOD.The audio, video data of VS-VOD issues the TS standard that adopts.The bandwidth resources of whole system are in charge of by SRM, and taking and discharging by VS of resource finally confirmed.
By above-mentioned video request program flow process as can be known, when on hfc plant, carrying out VOD service, by the RTSP consensus standard video request program flow process in the ISMA standard, realized a kind of can be at hfc plant and IP network video on-demand system, simultaneously because technique scheme is based on the standard agreement realization, be fit to third party's expansion, help applying of video on demand techniques scheme.
In order to make above-mentioned video on demand techniques scheme can realize the mutual of HFC bilateral network, the RTSP agreement of ISMA norm-setting is introduced in the TS standard, and, in embodiments of the present invention RTSP has been done following correction for adapting to the requirement of HFC bilateral network:
1, the modification of URL:
Reference format: rtsp_URL=(" rtsp: " | ＂ rtspu: ") " // " host[": " port] [abs_path]
Revise the back form:
rtsp_URL＝(″rtsp:″|″rtspu:″)″//″host[″:″port][SessionID_string][abs_path]
Wherein SessionID_string is used for determining in whole system the unique identification of a program request.This indicates by SRM is unified and generates, and has overall uniqueness.
2, the modification of SETUP: in the video on-demand system of hfc plant, mutual message of RTSP and audio, video data distribute from two Channel Transmission, and audio, video data transmits by broadcast channel.For video server, both transmitting channels are also inequality, and the mutual message of RTSP directly is connected by TCP/UDP with the STB client, and audio, video data sends on certain port of the IPQAM in the hfc plant.In order to realize separating of the mutual message of RTSP and audio, video data, realize by two kinds of patterns in embodiments of the present invention, but and the method reference standard agreement among other RTSP realizes.
Pattern one, when utilizing STB and VS-Manager mutual, with IPQAM (IP port) sends to VS-Manager, send to VS-VOD by VS-Manager again, VS-VOD when initialization program request session, the transmission address that RTP/RTCP is set be IPQAM (IP, port);
The SETUP of pattern two, expansion standard RTSP agreement handles.
Original SETUP:
C->S:SETUP?rtsp://example.com/foo/bar/baz.rm?RTSP/1.0
CSeq:302
Transport:RTP/AVP；unicast；client_port=4588-4589
S->C:RTSP/1.0200OK
CSeq:302
Date:23Jan199715:35:06GMT
Session:47112344
Transport:RTP/AVP；unicast；
client_port=4588-4589；server_port=6256-6257
Client_port specifies the data receiver of STB, but specific data does not receive IP.In the video on-demand system of HFC bilateral network, the present invention adopts the TS transmission means, and audio frequency and video are a stream, so only need a target port.Amended SETUP is:
C->S:SETUP?rtsp://example.com/foo/bar/baz.rm?RTSP/1.0
CSeq:302
Transport:
RTP/AVP；unicast；client_port=4588；ipqam_ip=192.168.0.1
S->C:RTSP/1.0200OK
CSeq:302
Date:23Jan199715:35:06GMT
Session:47112344
Transport:RTP/AVP；unicast；
client_port=4588；server_port=6256
The server section when treatment S ETUP, the transmission address that RTP/RTCP is set be IPQAM (IP, port).
By above-mentioned modification to RTSP, can realize the mutual of HFC bilateral network, can in the HFC bilateral network, carry out VOD service effectively, for the user provides reliable service guarantee.
Because the asymmetry of two-way hfc plant uplink and downlink, cause the video request program of IP network and not exclusively be suitable for two-way hfc plant, so can separate by the up-downgoing transmission of RTCP control protocol in embodiments of the present invention, be the up two-way channel transmission that utilizes, utilize the broadcast channel transmission in the private data of the descending TS of being encapsulated in.
Owing to must adopt the TS standard in hfc plant down channel transfer of data, for data, consider the factor of network maximum number of byte and transmitting efficiency by the encapsulation of TS form, send 7 TS bags, i.e. 188 * 7=1316 bytes at every turn.For the data of other non-TS bags, the RTCP bag as the server to client end is encapsulated in the private data of TS bag, 188 bytes of less than, zero padding is handled.
In embodiments of the present invention since in hfc plant the user under same coaxial cable, share spectrum resources.For example, if adopt the MEPG2 coded format, can obtain more satisfactory image quality, the average bit rate of film is about 3.75MHz; If adopt the 64QAM modulation, symbol rate is 6.875, and effective bandwidth is 38M, and promptly a frequency can be served 10 road point broadcasting users.Yet, if certain user's on-demand assets does not have safe release, on the corresponding frequency of this user, will influence the operate as normal of IPQAM above 10 tunnel users, cause the video request program of other users on this frequency to be affected.Owing to existing IPQAM product, there is not the external interface of control bandwidth resource usually, need the user in the management of IPQAM with external realization bandwidth resources.
Propose to distribute bandwidth resources the taking and discharge of VS control bandwidth resource in the embodiment of the invention by SRM.VS is the equipment of utilized bandwidth, can be realized taking the security control of resource by VS control.
In embodiments of the present invention, bandwidth management is divided into two kinds of handling processes, a kind of is Bandwidth Management normal process flow process, and another kind is the abnormality processing flow process of Bandwidth Management, will introduce the step of two kinds of flow processs respectively below.
Bandwidth Management normal process flow process:
1, before the STB program request, needs at first to apply for suitable bandwidth resources that if SRM has bandwidth resources, corresponding resource information is returned to STB, it is interim state that corresponding resource is set simultaneously to SRM; Otherwise refusing user's application.
2, after STB obtained the resource usage license, to VS-Manager request service message, VS-Manager returned the program request URL of the lightest VS-VOD of load to STB.
3, STB to the VS-VOD request program, after the program request success, produces the message (being actually the formal occupied beginning of resource) that program request begins by VS-VOD according to above-mentioned URL, and after SRM received corresponding message, then corresponding resource was set to seizure condition.
4, after the STB program request normal termination, confirm to be finished by VS-VOD, stop after the corresponding port of IPQAM is sent out data, produce the message that program request finishes (in fact time resource be released), after SRM received corresponding message, corresponding resource was set to idle condition.
In above-mentioned flow process, the end-state of resource all is that the actual user VS-VOD by bandwidth controls, and the user mode that can guarantee resource is a time of day.
The abnormality processing flow process of Bandwidth Management:
One, STB is unusual:
1) after STB obtained bandwidth resources, before formal program request, if there is not the program request success within a certain period of time, VS sent the not successful message of program request to SRM.After SRM received this message, it was idle condition that corresponding resource is set.
2) after the normal program request of STB begins, because abort utilizes the RTCP control protocol to handle.STB needs regularly to send to VS-VOD the RR grouping of RTCP in normal on-demand process, if the overtime RR blocking message that do not detect of VS-VOD thinks that then STB withdraws from unusually, initiatively finish this program request.Send the message that program request finishes to SRM, after SRM received corresponding message, corresponding resource was set to idle condition.
Two, VS is unusual
1) VS-Manager is unusual: VS-Manager need be in database the state of savepoint broadcasting user, if work as machine, VS-Manager need be from database the reply state of recovery point broadcasting user.Send resource release message for the program request that has finished to SRM, whether unclosed program request is inquired about this reply to VS-VOD and is survived, and make respective handling.
2) VS-VOD is unusual: VS-Manager detects corresponding VS-VOD behind machine, is set to finish for the reply with this VS-VOD in the reply of keeping, and sends the program request end to SRM.
Whether 3) normal condition: VS-Manager regularly survives to the VS-VOD inquiry session, if after 3 inquiry failures, thinks that this reply finishes, and sends the program request end to SRM, sends a message that initiatively finishes this reply to VS-VOD simultaneously.
Three, SRM is unusual:
VS-Manager has safeguarded the just User Status in program request, and no matter SRM all can inquire about the state of reply when machine or normal condition, does not exist if inquire reply, and it is idle condition that corresponding resource then is set.
Four, IPQAM is unusual:
If it is unusual that webmaster detects IPQAM, to SRM, VS sends the IPQAM unexpected message, after VS receives unexpected message, initiatively finish all replies corresponding to this IPQAM, and send the message that program request finishes to SRM, SRM receives that corresponding resource being set after the message is idle condition.After SRM received the IPQAM unexpected message, it was down state that corresponding bandwidth resource is set.
By technique scheme as can be known, come the managing bandwidth resource by VS in embodiments of the present invention, make the user in the HFC bilateral network, carry out VOD service effectively, and realize the reliable management in bandwidth ground, for the user provides service guarantee reliably, and, owing to realize Bandwidth Management by VS, make technique scheme be equally applicable to the video on-demand system of IP network, be fit to third-party expansion.
In order to realize said method, the apparatus embodiments that the system architecture schematic diagram is provided in embodiments of the present invention and has wherein used.
As shown in Figure 3, be embodiment of the invention stream media service system configuration diagram, only indicate the required necessaries of streaming media service among the figure, this system comprises Video Server (streaming media server as we know from the figure, be called for short VS), SRM, IPQAM, CMTS (Cable Modem TerminationSystem, Cable Modem Terminal System), program source, the inner exchanging machine, hfc plant and TV+STB, wherein, program source is with after VS is connected, be connected with the inner exchanging machine again, what be connected with the inner exchanging machine also has SRM, the inner exchanging machine by IPQAM and CMTS through 64QAM be connected with hfc plant respectively after QPSK adjusts, thereby broadcast television signal is passed to terminal equipment TV+STB by HFC.
To introduce the function of the said equipment in detail below:
Above-mentioned VS provides video-on-demand service for the user, comprises management server VS-Manager and fluidisation server VS-VOD two parts.
Above-mentioned SRM is in charge of employed frequency spectrum resource of whole system and affiliated STB user.
Above-mentioned IP QAM is responsible for the transmission of downlink data, the video stream data of VS (is in fact comprised video data, voice data and other control datas, be referred to as video stream data), be modulated to and can output to hfc plant through 64QAM at the signal of hfc plant transmission.IPQAM is an existing standard equipment, handles the MPEG over IP stream that receives by G bit Ethernet interface.By the G bit interface, extract MPEG SPTS (Single Program Transport Streams is called for short SPTS), be multiplexed into the QAM channel of appointment with other SPTS, be modulated on the RF frequency of expectation, output to hfc plant at last.The IPQAM of existing standard defines road program stream on the IP network by UDP (User Datagram Protoco (UDP))/IPGbE port.General mapping scheme is the Industry Standard UDP Port Default Mapping (udp port acquiescence mapping industry standard) of HarmonicEdgeQAMs at present.Each QAM has independent IP address, uses this IP address and udp port can determine pairing frequency of one road SPTS and program number.
Above-mentioned CMTS is responsible for the HFC transmission of uplink data, and (in fact this channel provides the transmitted in both directions of data, adopt QPSK (quarternary phase-shift keying (QPSK) signal) modulation system, but bandwidth only is used for the transmission of interactive information much smaller than down channel), the interconnected of hfc plant and IP network is provided.
Above-mentioned STB is modulated to and receives and formulates the corresponding frequency of program, receives the program of appointed program number.Utilize above-mentioned STB, VS only need know Target IP and port in system, promptly can be STB service is provided, and shields the physical characteristic of hfc plant effectively.
In said system, VS and SRM run on IP network, do not have physically with hfc plant and contact directly.VS, SRM and program source constitute a general streaming media service service platform, be applicable to hfc plant and IP network simultaneously, particularly VS adopts standard agreement, and the realization based on the streaming media service of HFC bilateral network is had nothing to do with physical network, can be applicable to hfc plant and IP network simultaneously.IPQAM, SRM and hfc plant constitute transmission system.
In order to realize said method, a kind of equipment of realizing based on the streaming media service of HFC bilateral network also is provided in embodiments of the present invention, this equipment comprises:
The uplink processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the up two-way channel transmission information of utilizing of rtcp protocol control;
The downlink transfer processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the descending broadcast channel transmission information of utilizing of rtcp protocol control.
And for can the control bandwidth resource, the said equipment also comprises the bandwidth management device, is used for by RTCP the bandwidth resources of described hfc plant being managed.
By technique scheme as can be known, come the managing bandwidth resource by VS in embodiments of the present invention, make the user in the HFC bilateral network, carry out VOD service effectively, and realize the reliable management in bandwidth ground, for the user provides service guarantee reliably, and, owing to realize Bandwidth Management by VS, make technique scheme be equally applicable to the video on-demand system of IP network, be fit to third-party expansion.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (7)
1. streaming media service implementation method based on the HFC bilateral network is characterized in that described method comprises:
In the HFC bilateral network, realize the video request program operation by the stream media protocol RTSP in the ISMA of the internet stream media alliance standard, and in realizing described video request program operating process, by the up two-way channel transmission information of utilizing of RTCP Real-time Transport Control Protocol RTCP control, the descending broadcast channel transmission information of utilizing is to realize the separation of uplink and downlink transmission.
2. the streaming media service implementation method based on the HFC bilateral network according to claim 1 is characterized in that described method further comprises:
Application layer services quality Q oS control in the described video request program operating process of described RTCP Real-time Transport Control Protocol RTCP standardization.
3. the streaming media service implementation method based on the HFC bilateral network according to claim 1 is characterized in that, described video request program operation also comprises:
Judge whether to exist available bandwidth resources, if, send resource allocation message, otherwise, the resource allocation failed message sent;
After receiving described resource allocation message, judged whether the film resource,, then carried out described video request program operation by described stream media protocol RTSP if having, otherwise, not success message of program request returned;
If video request program finishes, then send the video request program end.
4. the method that realizes based on the streaming media service of HFC bilateral network according to claim 2, it is characterized in that, specifically comprise by the application layer services quality Q oS control method in the described video request-program process of described RTCP Real-time Transport Control Protocol rtcp protocol standardization:
Distribute bandwidth resources;
Send the bandwidth on demand message related to resources;
Whether have bandwidth resources, if having, then send the information of bandwidth resources correspondence if judging, otherwise, send refuse information;
The taking and discharge of control bandwidth resource.
5. the method that realizes based on the streaming media service of HFC bilateral network according to claim 4 is characterized in that the method that takies and discharge of described bandwidth resources comprises:
Ask described bandwidth resources;
Receive the program request URL(uniform resource locator);
According to described URL(uniform resource locator) order video, if the program request success, then described bandwidth resources are set to seizure condition, otherwise described bandwidth resources are set to idle condition;
After if program request finishes, send the program request end, described bandwidth resources are set to idle condition.
6. an equipment of realizing based on the streaming media service of HFC bilateral network is characterized in that, comprise,
The uplink processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the up two-way channel transmission information of utilizing of rtcp protocol control;
The downlink transfer processing unit is used for realizing in the video request program operating process in the RTSP agreement by the ISMA standard, based on the descending broadcast channel transmission information of utilizing of rtcp protocol control.
7. the equipment of realizing based on the streaming media service of HFC bilateral network according to claim 6 is characterized in that described equipment also comprises:
The bandwidth management device is used for by RTCP the bandwidth resources of described hfc plant being managed.
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| CN101867803B (en) * | 2010-05-21 | 2012-11-28 | 杭州华三通信技术有限公司 | Data transmission method, equipment and system |
| CN101945119B (en) * | 2010-09-30 | 2013-04-24 | 深圳市同洲电子股份有限公司 | Video session method based on two-way HFC (Hybrid Fiber Coax) network as well as associated equipment and system |
| CN102480365B (en) * | 2010-11-26 | 2014-01-08 | 中国科学院声学研究所 | System and method for realizing unified multicast |
| CN102624752B (en) * | 2011-01-26 | 2014-06-18 | 天脉聚源(北京)传媒科技有限公司 | Anti-hotlinking method and system for M3U8 live streaming |
| CN102158736A (en) * | 2011-01-30 | 2011-08-17 | 深圳市同洲电子股份有限公司 | Method of video on demand, system and resource management equipment |
| CN102710437B (en) * | 2012-05-24 | 2015-07-08 | 广州金视网络信息工程有限公司 | Mobile HFC network information interaction system |
| CN103442257A (en) * | 2013-08-15 | 2013-12-11 | 青岛海信传媒网络技术有限公司 | Method, device and system for achieving flow resource management |
| CN105611377A (en) * | 2015-12-24 | 2016-05-25 | 南通同洲电子有限责任公司 | Digital television network system |
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| CN1284817A (en) * | 2000-05-13 | 2001-02-21 | 深圳市天圣电脑有限公司 | Transmission system and method for web site video request |
| CN1545318A (en) * | 2003-11-14 | 2004-11-10 | 西安交通大学 | A method for implementing web teleeducation system |
| CN1547395A (en) * | 2003-12-05 | 2004-11-17 | 阳 黄 | A visible telephone system |
| CN1744592A (en) * | 2005-09-29 | 2006-03-08 | 西安交通大学 | Multi-source flow media transmission QoS control method |
| CN1960236A (en) * | 2006-02-22 | 2007-05-09 | 上海傲蓝通信技术有限公司 | Coaxial mixed full service access network system of bidirectional optical fiber |
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