CN111654760A - VOD video interactive on-demand method and system - Google Patents
VOD video interactive on-demand method and system Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/631—Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
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- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
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- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
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- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
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Abstract
The invention discloses a VOD video interactive on-demand method, which comprises the following steps: the set-top box sends a VOD request to a VOD server through an optical fiber bidirectional network; after receiving the request, the VOD server sends a request response result to the set-top box through the bidirectional network; when the VOD server sends a message that the on-demand request is successful, the set-top box is informed of receiving the on-demand program stream at a specific frequency point, and the program on-demand stream is pushed to a broadcast data stream multiplexing optical transmitter, and the broadcast data stream multiplexing optical transmitter broadcasts the program on-demand stream to a network receiving tuner in a corresponding multicast channel through an optical distribution network; the network receiving tuner filters out the on-demand program and forwards the on-demand program to the set top box for playing. The VOD video interactive on-demand system based on the IP broadcasting technology has good bandwidth expansibility, can greatly expand the downlink bandwidth of the existing optical fiber bidirectional access system, and meets the bandwidth requirement of future high-quality VOD video service.
Description
Technical Field
The invention relates to the technical field of broadcasting, in particular to a VOD video interactive on-demand method and a VOD video interactive on-demand system.
Background
Interactive television vod (video on demand) is a brand new video service for cable television networks, which gets rid of the space-time limitation of the traditional live television and provides users with viewing experience different from that of the traditional television. The user can carry out video on demand, time-shifted television, music on demand and the like according to own wishes. The VOD video-on-demand system mainly comprises a VOD front-end processing system, a transmission network and a user set-top box. However, with the development of video technology, the high-quality VOD video service provides new challenges for network bandwidth, such as 4K, 8K, and the high-quality video services such as AR/VR urgently need larger downlink bandwidth, so how to effectively implement high-speed large-scale high-quality VOD application becomes a research hotspot of a broadcast network.
The existing broadcast television network mainly has two VOD technologies. Firstly, the VOD video-on-demand service is realized by adopting an IPQAM technology based on RF radio frequency modulation. The IPQAM technology multiplexes, scrambles, modulates, converts frequency and the like the IP video stream from the VOD server, multiplexes the IP video stream and the live broadcast signal on a fixed planning frequency point, and transmits the signal to the set-top box through an optical fiber coaxial Hybrid (HFC) network. Although the existing IPQAM technology can partially relieve the pressure of VOD application on network bandwidth by moving IPQAM equipment down and reducing the number of concurrent users, due to the limitation of radio frequency resources, the carrying capacity of the technology for future high-quality VOD service is extremely limited. In addition, the modulation and demodulation technology of the IPQAM technology is complex, and the network operation and maintenance cost is high. Therefore, the IPQAM technology is difficult to meet the future VOD service requirement with high quality (such as 4K, 8K, AR/VR, etc.).
And the second is to adopt GPON/EPON technology to realize VOD service through IPTV unicast mode. For a broadcast and television operator, because the bandwidth of the live broadcast service (DVB live broadcast) + the bandwidth of the VOD service, most of the downlink bandwidth of a GPON/EPON system is occupied, and especially the requirements of high-quality VOD and DVB live broadcast services on the bandwidth are larger, the residual bandwidth reserved for the bidirectional access service is few. Although the problem can be solved by upgrading the network technology to a 10G or 100G GPON/EPON system, the simple network upgrade not only causes the network construction cost to increase greatly, but also the uplink bandwidth after the system upgrade cannot be fully utilized.
Disclosure of Invention
In view of the foregoing defects in the prior art, the technical problem to be solved by the present invention is to provide a VOD video interactive on-demand method and system based on IP broadcasting technology, which can support thousands of VOD users to perform on-demand services of standard definition television, high definition television, 4K and above (8K/VR/AR) video programs without being limited by RF frequency bandwidth. When the VOD bandwidth demand is increased, the network equipment does not need to be updated, and only the bandwidth configuration of the IP broadcasting system needs to be dynamically adjusted to increase the bandwidth proportion of the VOD service.
In order to achieve the above object, the present invention provides a VOD video interactive on demand method, comprising the steps of:
a Set Top Box (STB) transmitting a VOD on demand request to a VOD server via a network reception Tuner (IP Tuner) and an upstream channel of a bidirectional network;
after receiving a VOD request sent by the set-top box, the VOD server sends a request response result to the set-top box through a downlink channel of the bidirectional network;
when the VOD server sends a message that the on-demand request is successful, the set-top box is informed of receiving the on-demand program stream at a specific frequency point, and the on-demand program stream is pushed to a broadcast data stream multiplexing optical transmitter (DLT);
the broadcast data stream multiplexing optical transmitter broadcasts the on-demand program stream to a network receiving Tuner (IP Tuner) in a corresponding multicast channel through an Optical Distribution Network (ODN); and filtering the on-demand program by the network receiving tuner and forwarding the on-demand program to the set top box for playing.
Further, a request message of VOD ordering sent by the set top box carries corresponding area code information; when the VOD server succeeds in ordering the request, the VOD server pushes the ordered program stream to the IP address corresponding to the region code in a unicast mode according to the region code information in the request message, namely the IP address of the broadcast data stream multiplexing optical transmitter.
Further, when the VOD server sends a message that the on-demand request is successful, the VOD server informs the set-top box to receive the on-demand program stream at a specific frequency point, and pushes the on-demand program stream to the broadcast data stream multiplexing optical transmitter, which specifically includes:
after receiving the request, the VOD server replies a request response message to the set-top box through a downlink channel of the bidirectional network and the network receiving tuner;
and the VOD server sends a UDP/IPVOD video service message to the broadcast data stream multiplexing optical sender with the IP address corresponding to the area code information, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system.
Further, the broadcast data stream multiplexing optical transmitter broadcasts the on-demand program stream to the network receiving tuner in the corresponding multicast channel through the optical distribution network; the method comprises the following steps that a network receiving tuner filters out on-demand programs and forwards the on-demand programs to a set top box for playing, and specifically comprises the following steps:
the broadcast data stream multiplexing optical transmitter realizes the compatibility of the prior IPQAM system by establishing and maintaining a frequency point and multicast channel address mapping table;
according to the mapping table of the frequency point and the multicast channel address, the broadcast data stream multiplexing optical transmitter transmits the received on-demand program stream to a corresponding multicast channel; and after receiving the VOD reply message from the VOD server, the set top box reports the channel address corresponding to the frequency point information to the network receiving tuner, and the network receiving tuner filters the video program to be requested according to the multicast address and the port number in the channel address and plays the video program by the set top box.
Another preferred embodiment of the present invention discloses a VOD video-on-demand system, comprising:
the request module of on demand, is used for the set-top box to receive the upstream channel of tuner and two-way network and send VOD on demand request to VOD server via the network;
the request response module is used for sending a request response result to the set-top box through a downlink channel of the bidirectional network after the VOD server receives a VOD request sent by the set-top box;
the push module is used for informing the set-top box of receiving the on-demand program stream at a specific frequency point and pushing the program on-demand stream to the broadcast data stream multiplexing optical transmitter after the VOD server sends the information that the on-demand request is successful;
the broadcasting module is used for broadcasting the on-demand program stream to a network receiving tuner in a corresponding multicast channel through a light distribution network (ODN) by a broadcast data stream multiplexing light transmitter (DLT); the network receiving tuner filters out the on-demand program and forwards the on-demand program to the set top box for playing.
Further, the on-demand request module may,
the request message unit is used for carrying corresponding area code information in a request message of a VOD request sent by the set top box; when the VOD server succeeds in ordering the request, the VOD server pushes the ordered program stream to the IP address corresponding to the area code in the form of unicast stream, namely the IP address of the broadcast data stream multiplexing optical transmitter.
Further, the pushing module specifically includes:
the response unit is used for the VOD server to reply a request response message to the set-top box through a downlink channel of the bidirectional network and the network receiving tuner after receiving the request;
and the pushing unit is used for the VOD server to send the UDP/IP VOD video service message to the broadcast data stream multiplexing optical transmitter with the IP address corresponding to the area code information, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system.
Further, the playing module specifically includes:
the new building and maintenance unit is used for establishing and maintaining a mapping table of a frequency point and a channel address by the broadcast data stream multiplexing optical transmitter, so that the compatibility of the existing IPQAM system is realized;
the broadcasting unit is used for broadcasting the data stream and multiplexing the optical transmitter to send the received video stream into a corresponding multicast channel according to the mapping table of the frequency point and the communication address; and after receiving the VOD reply message from the VOD server, the set top box converts the frequency point information into a channel address and reports the channel address to the network receiving tuner, and the network receiving tuner filters the video program to be requested according to the multicast address and the port number in the channel address and plays the video program by the set top box.
Furthermore, starting from the physical module group angle, the VOD video interactive on-demand system based on the IP broadcasting technology is composed of a video interactive on-demand service module, a VOD request and response bidirectional channel module and a VOD service unidirectional broadcasting channel module; wherein:
the video interactive on-demand service module consists of a VOD server and a terminal set-top box, wherein the set-top box sends an on-demand request to the VOD server, and the VOD server replies an on-demand response to the set-top box; after the request is approved, the VOD server sends VOD video service to the set-top box;
the VOD request and response bidirectional channel module consists of a bidirectional network and a network receiving tuner and is used for responding to an uplink request and a downlink response between the VOD server and the set top box; the bidirectional network may be constituted by a bidirectional access network of any physical transmission medium or technology; the network receiving tuner is responsible for transparently forwarding the request and response message between the bidirectional network and the set-top box;
the VOD service unidirectional broadcast channel module consists of a broadcast data stream multiplexing optical transmitter, an optical distribution network and a network receiving tuner; when the request is successful, the VOD server sends a request success response to the set-top box, and informs the set-top box of receiving the request program stream at a specific frequency point in a response message; the on-demand program stream is then pushed to a broadcast data stream multiplex optical transmitter. The broadcast data stream multiplexing optical transmitter transmits the received program stream into a corresponding multicast channel according to a mapping table of a frequency point and a multicast channel address, wherein the channel address is identified by a multicast address plus a UDP port number, and the program on-demand stream is broadcast to a network receiving tuner through an optical distribution network; and the network receiving tuner filters the on-demand program according to the channel address and forwards the on-demand program to the set top box for playing.
Further, the broadcast data stream multiplexing optical transmitter establishes and maintains a frequency point and multicast channel address mapping table so as to realize VOD service compatibility of the existing IPQAM system; the DLT periodically broadcasts a frequency point and multicast channel address mapping table and an area code through a specific channel of the unidirectional broadcast channel, so that the network receiving tuner can automatically acquire, store or update the information when being started; the broadcast data stream multiplexing optical transmitter transmits the received video stream to a corresponding multicast channel according to the mapping table of the frequency point and the multicast channel address; after receiving the request reply message of the VOD server, the set-top box converts the frequency point information into a multicast channel address, namely a multicast address and a port number, and reports the multicast channel address to the network receiving tuner, and the network receiving tuner filters out the video program of the channel and forwards the video program to the set-top box for playing.
A further preferred embodiment of the invention discloses a communication transmission device comprising a memory and a processor, and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, performs the method as defined in any one of the above.
Technical effects
The invention provides a VOD video interactive ordering system based on IP broadcast technology, which transmits VOD request and response messages based on a bidirectional channel of the existing access network, VOD video service is transmitted to user end equipment through a unidirectional IP broadcast system, and the user end equipment receives ordered video service in a corresponding multicast channel and forwards the ordered video service to an STB (set top box) for playing. The VOD video interactive ordering method provided by the invention can realize large-scale high-quality VOD service by adding a unidirectional IP broadcast system on the existing bidirectional network, such as a GPON/EPON system or an HFC system, and is an effective technology for providing high-quality VOD service by a broadcast television network or other existing optical fiber bidirectional networks.
The invention adopts the baseband light wave modulation technology, avoids the complex radio frequency modulation of the IPQAM technology supporting VOD service; radio frequency points are not occupied, the limitation of physical frequency point resources is avoided, and large-code-stream high-quality VOD services such as VOD services of 4K (40Mbps), 8K (80Mbps), VR (160Mbps) and the like can be supported; the method supports software dynamic bandwidth allocation, can increase VOD concurrent number or promote concurrent stream code rate by increasing the bandwidth proportion of VOD service in the service planning of an IP broadcasting system, and does not need to replace system hardware equipment; the downlink bandwidth of the bidirectional network system can be greatly expanded, and the requirement of future high-quality VOD video service is met; the IP video broadcast bandwidth disclosed by the invention has expansibility, and only the transmission rate of a physical layer is required to be changed without changing a system transmission protocol.
The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.
Drawings
FIG. 1 is a system diagram of a VOD video interactive-on-demand method according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of VOD service encapsulation in IP broadcasting technology of a VOD video interactive on demand method according to a preferred embodiment of the present invention;
fig. 3 is a block diagram of an application system of a VOD video interactive ordering method compatible with IPQAM technology according to a preferred embodiment of the present invention.
Detailed Description
Example one
As shown in fig. 1, a VOD video interactive on demand system based on IP broadcasting technology includes a video VOD server, a bidirectional network, a broadcast data stream multiplexing optical transmitter (DLT), a network receiving Tuner (IP Tuner), a Set Top Box (STB), and an Optical Distribution Network (ODN). Wherein,
the VOD server and the set-top box form a video interactive on-demand service module;
the bidirectional network and the network receiving tuner form a VOD request and response bidirectional channel module which is used for responding to the upstream request and the downstream response between the VOD server and the set-top box; the bidirectional network may be formed by a bidirectional access network implemented by any physical transmission medium or technology.
The broadcast data stream multiplexing optical transmitter, the optical distribution network and the network receiving tuner form an IP unidirectional broadcast module which is used for transmitting IP on-demand programs to the set-top box in a unidirectional broadcast mode.
When the VOD server sends the successful request message, the VOD server informs the set-top box of receiving the requested program stream at the specific frequency point and pushes the requested program stream to the DLT, and the DLT broadcasts the requested program stream to the network receiving tuner in the corresponding multicast channel through the optical distribution network; the network receiving tuner filters out the on-demand program and forwards the on-demand program to the set top box for playing.
DLT realizes the compatibility of VOD service of the prior IPQAM system by establishing and maintaining a mapping table of frequency points and multicast channel addresses.
DLT broadcasts frequency point and multicast channel address mapping table and area code table periodically through the specific channel of IP broadcast channel, therefore, the network receiving tuner can automatically obtain, store or update the information when starting up; DLT sends the VOD program stream pushed by VOD server to corresponding multicast channel according to the mapping table of frequency point and multicast channel address; and after receiving the VOD reply message from the VOD server, the set top box reports the channel address corresponding to the frequency point information to the network receiving tuner, and the network receiving tuner filters out the video program of the channel address and forwards the video program to the set top box for playing.
The VOD video interactive on demand system in this embodiment specifically includes the following steps:
step (1), the set-top box sends a VOD request to a VOD server through a network receiving tuner and an uplink channel of a bidirectional network, wherein the VOD request message carries local area code information; and when the VOD server succeeds in requesting, pushing the requested program stream to the DLT corresponding to the area code in a unicast stream mode according to the area code information.
Step (2), after receiving the request, the VOD server sends a request response result to the set-top box; specifically, after the VOD server passes the user authentication, the request result is transmitted back to the set-top box through a downlink channel of the bidirectional network. If the request fails, the VOD server replies the request error information; if the request is successful, the VOD server replies the successful request information, and the successful request information message simultaneously contains the frequency point information of the received requested program stream.
And (3) the VOD server pushes the UDP/IP program stream requested to the DLT, wherein the destination port number of the UDP corresponds to the program planning frequency point. The DLT broadcasts the on-demand program stream to a network receiving tuner in a multicast channel corresponding to the frequency point through an optical distribution network; the network receiving tuner filters out the on-demand program and forwards the on-demand program to the set top box for playing.
The method specifically comprises the following steps:
the broadcast data stream multiplexing optical transmitter DLT realizes the compatibility to the IPQAM system by establishing and maintaining a frequency point and multicast channel address mapping table (the multicast channel address is identified by a multicast address plus a UDP port number).
According to the mapping table of the frequency point and the multicast channel address, the DLT sends the received video stream to a corresponding channel; the broadcast data stream multiplexing optical transmitter periodically broadcasts a frequency point and multicast channel address mapping table and an area code through a specific channel of an IP broadcast system, so that the network receiving tuner can automatically acquire, store or update the information when being started.
After receiving the successful request response message of the VOD server, the set-top box reports the multicast channel address (multicast address plus port number) corresponding to the frequency point information in the message to the network receiving tuner, and the network receiving tuner filters out the video program of the multicast channel and plays the video program by the set-top box.
The specific implementation mode is as follows:
step (1), the set-top box sends a VOD request with a destination address of a VOD server and carrying area code information; the area code is a standard format of a VOD system, is a 32-bit long integer byte, and the specific meaning of each bit is defined by an operator, for example, the area code is gradually defined according to city-county-district and the like, or can be directly defined as an integer value. The VOD server will build and maintain two tables:
1. the region code and broadcast data stream multiplex the IP address mapping table of the optical transmitter, in the IPQAM system, the IP address is the IP address of IPQAM apparatus, in the embodiment of the invention, the IP address is the IP address of DLT;
2. the VOD server is in UDP/IP VOD video service message pushed to DLT, the destination port number of the UDP message corresponds to the program frequency point;
after receiving the uplink VOD request, the network receiving tuner forwards the request to a VOD server through an uplink channel of a bidirectional network;
after receiving the request, the VOD server replies a request response message to the set-top box through a downlink channel of the bidirectional network and the network receiving tuner; when the request is successful, the set top box receives the frequency point information played by the on-demand program, and the on-demand program can be analyzed on the corresponding frequency point;
after the request of the VOD is successful, the VOD server sends a UDP/IP VOD video service message with the destination address of the DLT to the DLT of the IP address corresponding to the area code according to the IP address mapping table of the multiplexing optical transmitter of the area code and the broadcast data stream, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system;
step (5) after receiving the on-demand program message pushed by the VOD server, the DLT acquires the playing frequency point of the on-demand program according to the UDP port number in the message, updates the IP address and the port number of the on-demand program message into a corresponding multicast channel address according to a mapping table of the frequency point and the multicast channel address, and broadcasts the on-demand program message to all network receiving tuners in the area through an optical distribution network;
and (6) filtering VOD (video on demand) messages of corresponding multicast channels by the network receiving tuner according to the mapping table of the frequency points and the multicast channel addresses and the frequency point information received by the set top box, updating the multicast addresses into IP addresses of corresponding STB (set top box), and broadcasting and sending the IP addresses to the STB for playing. Meanwhile, DLT broadcasts a mapping table of frequency points and multicast channel addresses periodically, so that the set-top box converts the frequency point information replied by the server into the multicast channel address and sends the multicast channel address to the network receiving tuner to finish the filtering of the on-demand service.
The embodiment realizes full IP transmission based on the conventional VOD system based on the IPQAM technology, which brings the following technical effects:
1. compared with the VOD system of the existing IPQAM technology, the embodiment realizes the complete IP of VOD, omits the modulation and demodulation processes, simplifies the system and reduces the cost; the bandwidth of the on-demand program is not limited by the frequency point bandwidth of the IPQAM modulation technology any more, and the video program content with 4K/8K or higher quality can be supported; after full IP, the terminal equipment of the VOD system is not limited to the set-top box any more, and can be a soft terminal running on a mobile phone or a smart television; the system in the embodiment can be compatible and compatible with the original IPQAM VOD system.
2. The embodiment can greatly expand the downlink bandwidth of the existing optical fiber bidirectional access system and has good bandwidth expansibility, thereby meeting the continuously rising bandwidth requirement of future high-quality VOD video service.
The present embodiment relates to a VOD-based video interactive on demand system, and the format of the on demand video stream is packaged as shown in fig. 2. In the case implementation: the VOD server pushes UDP/IP video messages to DLT unicast belonging to the set top box sending the VOD request, wherein the video data adopts RTP-MPEG2/4-TS video packaging format, and the VOD video messages transmitted by the invention include but are not limited to the video coding format; mapping the UDP port number with a planning frequency point of the IPQAM system; the IP address is the IP address of the DLT to which the set-top box sending the VOD request belongs. After receiving the UDP/IP video message, the DLT acquires the program frequency point information according to the mapping relation between the UDP port number and the frequency point, and updates the IP address and the UDP port number of the message into the corresponding multicast channel address according to the mapping table of the frequency point and the multicast channel address. And the network receiving tuner filters the local video program according to the frequency point information and the frequency point and multicast channel mapping table received by the request set top box, updates the IP address of the video service message, and sends the video service message to the set top box in a unicast mode.
Example two
The second embodiment of the VOD video interactive on demand system according to the present invention is compatible with the existing HFC network based on IPQAM technology to provide VOD services, and the network system is shown in fig. 3. The whole broadcasting and television network system is divided into an optical fiber coaxial hybrid network (HFC) area and an optical fiber to the home network (FTTH) area.
In an HFC network area, a network provides VOD service and DVB live broadcast service by adopting IPQAM technology, and a request and response between a Set Top Box (STB) and a VOD server are completed through a bidirectional access channel of HFC; DVB live broadcast, VOD on demand and system service information (SI/EPG) are broadcasted to STB by IPQAM technology, STB demodulates IPQAM RF signal according to the received frequency point information, and VOD on demand program is obtained.
In a fiber-to-the-home area, a broadcast data stream multiplexing optical transmitter (DLT) and a network receiving Tuner (IP Tuner) are added on an original fiber-to-the-home bidirectional network (such as EPON/GPON). The request and response between STB and VOD server are realized through optical fiber bidirectional access channel; DVB live broadcast, VOD on demand and system service information (SI/EPG) are broadcasted to STB via DLT, and IP Tuner obtains VOD on demand program according to frequency point information and frequency point and multicast channel mapping table received by STB.
The physical composition of the fiber-to-the-home area system specifically comprises a video interactive on-demand service module, which is composed of a VOD server and a terminal STB. The STB sends a VOD request to the VOD server, and the VOD server replies a request response to the STB; and after the VOD is successfully requested, the VOD server sends the VOD video service to the set top box.
And the VOD request and response bidirectional channel module consists of a fiber-to-the-home bidirectional network (such as EPON/GPON) and an IP Tuner and is used for responding an uplink VOD request and a downlink response between the VOD server and the STB. The IP Tuner is responsible for transparently forwarding VOD on demand request and response messages between the bi-directional network and the set-top box.
The VOD service unidirectional broadcast channel module consists of a DLT, an optical distribution network and an IP Tuner. The optical distribution network and the fiber-to-the-home bidirectional network can share the same passive optical network through wavelength multiplexing, and can also be independently constructed by adopting the passive optical network. When VOD is successful, the VOD server sends a successful response of the VOD request to the STB, and simultaneously informs the STB of receiving the VOD program stream at a specific frequency point in a response message; then, pushing the UDP/IP on-demand program stream to the DLT, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system; DLT according to the mapping table of frequency point and multicast channel address, send the program stream of the order received into the corresponding multicast channel (the channel address is marked by IP multicast address plus UDP port number), through the optical distribution network, broadcast the program stream of the order to IP Tuner; the IP Tuner filters out the on-demand program according to the multicast channel address informed by the STB and forwards the on-demand program to the STB for playing.
The logical function of the fiber-to-the-home area system comprises the following steps:
a VOD request module for the set-top box (STB) to send VOD request to the VOD server via the network receiving and Tuner (IP Tuner) and the upstream channel of the optical fiber bidirectional network;
the request response module is used for sending a request response result to the Set Top Box (STB) through a downlink channel of the optical fiber bidirectional network after the VOD server receives a VOD request sent by the Set Top Box (STB);
the broadcast module is used for informing the set-top box of receiving the on-demand program stream at a specific frequency point and pushing the video service stream to a broadcast data stream multiplexing optical transmitter (DLT) after the VOD server sends a message that the on-demand request is successful, and the broadcast data stream multiplexing optical transmitter (DLT) broadcasts the VOD video service stream to a network receiving and tuning device (IP Tuner) in a corresponding multicast channel through an Optical Distribution Network (ODN) network; the network receiving and Tuner (IP Tuner) filters out the on-demand programs and forwards the on-demand programs to the set top box for playing.
Further, the on-demand request module may,
the system also comprises a request message unit, which is used for carrying corresponding area code information in a request message of a VOD request sent by the Set Top Box (STB); and when the VOD server succeeds in ordering the request, pushing the ordered program stream to an IP address corresponding to the area code in a unicast stream mode according to the area code information in the request message, namely the IP address of a broadcast data stream multiplexing optical transmitter (DLT).
Further, the pushing module specifically includes:
the response unit is used for the VOD server to reply the on-demand response message to the STB through a downlink channel of the bidirectional network and the IP-Tuner of the network receiving and Tuner after receiving the on-demand request;
and the pushing unit is used for sending a UDP/IP VOD video service message with the destination address being corresponding to the DLT of the corresponding DLT to the DLT corresponding to the area code information by the VOD server after the request for the on-demand is allowed, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system.
Further, the playing module specifically includes:
the new building and maintenance unit is used for establishing and maintaining a mapping table of a frequency point and a channel address by a broadcast data stream multiplexing optical transmitter (DLT) so as to realize the compatibility of the prior IPQAM system;
the broadcasting unit is used for broadcasting the data stream and multiplexing the mapping table of the communication address and sending the received video stream to a corresponding multicast channel by the optical transmitter DLT; after receiving the request reply message of the VOD server, the Set Top Box (STB) converts the frequency point information into a channel address and reports the channel address to a network receiving and tuning device (IP Tuner), and the network receiving and tuning device (IPTUner) filters the requested video program according to the multicast address and the port number in the channel address and plays the video program by the Set Top Box (STB).
Further, a broadcast data stream multiplexing optical transmitter (DLT) realizes the compatibility of VOD service of the existing IPQAM system by establishing and maintaining a mapping table of frequency points and channel addresses (multicast addresses plus UDP port numbers); DLT broadcasts the mapping table of frequency point and channel address and area code periodically through the specific main channel of IP broadcasting system, therefore, IP Tuner can obtain and keep or upgrade these information automatically while starting up; DLT sends the received video stream to the corresponding multicast channel according to the mapping table of the frequency point and the channel address; and after receiving the on-demand reply message of the VOD server, the STB converts the frequency point information into a channel address, namely a multicast address and a port number, and reports the channel address to the IP Tuner, and the IP Tuner filters out the video program of the channel address and plays the video program by the STB.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (9)
1. A VOD video interactive on-demand method is characterized by comprising the following steps:
the set-top box sends a VOD request to the VOD server through the network receiving tuner and the upstream channel of the bidirectional network;
after receiving a VOD request sent by the set top box, the VOD server sends a request response result to the set top box through a downlink channel of the bidirectional network;
when the VOD server sends a message that the on-demand request is successful, the set-top box is informed to receive the on-demand program stream at a specific frequency point and pushes the on-demand program stream to the broadcast data stream multiplexing optical transmitter;
the broadcast data stream multiplexing optical transmitter broadcasts an on-demand program stream to the network receiving tuner in a corresponding multicast channel through an optical distribution network; and filtering the on-demand program by the network receiving tuner and forwarding the on-demand program to the set top box for playing.
2. The interactive VOD method as claimed in claim 1, wherein the request message of VOD transmitted from the set-top box carries the corresponding region code information; and when the VOD server succeeds in ordering the request, pushing the ordered program stream to an IP address corresponding to the area code in a unicast mode according to the area code information in the request message, namely the IP address of the broadcast data stream multiplexing optical transmitter.
3. The VOD video interactive on demand method according to claim 2, wherein when the VOD server sends a message that the on demand request is successful, the set top box is notified of receiving the on demand program stream at a specific frequency point and pushes the on demand program stream to the broadcast data stream multiplexing optical transmitter, specifically comprising:
after receiving the request, the VOD server replies a request response message to the set-top box through a downlink channel of the bidirectional network and the network receiving tuner;
and the VOD server sends a UDP/IPVOD video service message to the broadcast data stream multiplexing optical sender with the IP address corresponding to the area code information, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system.
4. The VOD video interactive on demand method according to claim 2, wherein the broadcast data stream multiplexing optical transmitter broadcasts the on demand program stream to the network reception tuner in the corresponding multicast channel through the optical distribution network; the method comprises the following steps that a network receiving tuner filters out on-demand programs and forwards the on-demand programs to a set top box for playing, and specifically comprises the following steps:
the broadcast data stream multiplexing optical transmitter realizes the compatibility of the prior IPQAM system by establishing and maintaining a frequency point and multicast channel address mapping table;
according to the mapping table of the frequency point and the multicast channel address, the broadcast data stream multiplexing optical transmitter transmits the received on-demand program stream to a corresponding multicast channel; and after receiving the VOD reply message from the VOD server, the set top box reports the channel address corresponding to the frequency point information to the network receiving tuner, and the network receiving tuner filters the video program to be requested according to the multicast address and the port number in the channel address and plays the video program by the set top box.
5. A VOD video-on-demand system comprising:
the request module of on demand, is used for the set-top box to receive the upstream channel of tuner and two-way network and send VOD on demand request to VOD server via the network;
the request response module is used for sending a request response result to the set-top box through a downlink channel of the bidirectional network after the VOD server receives a VOD request sent by the set-top box;
the push module is used for informing the set-top box of receiving the on-demand program stream at a specific frequency point and pushing the program on-demand stream to the broadcast data stream multiplexing optical transmitter after the VOD server sends the information that the on-demand request is successful;
the broadcasting module is used for broadcasting the on-demand program stream to the network receiving tuner in the corresponding multicast channel by the broadcast data stream multiplexing optical transmitter through the optical distribution network; the network receiving tuner filters out the on-demand program and forwards the on-demand program to the set top box for playing.
6. The VOD video interactive-on-demand system of claim 5, wherein the on-demand request module,
the request message unit is used for carrying corresponding area code information in a request message of a VOD request sent by the set top box; and when the VOD server succeeds in ordering the request, pushing the ordered program stream to an IP address corresponding to the area code in a unicast stream mode according to the area code information in the request message, namely the IP address of the broadcast data stream multiplexing optical transmitter.
7. The VOD video-on-demand system according to claim 6, wherein the push module specifically comprises:
the response unit is used for the VOD server to reply a request response message to the set-top box through a downlink channel of the bidirectional network and the network receiving tuner after receiving the request;
and the pushing unit is used for the VOD server to send the UDP/IP VOD video service message to the broadcast data stream multiplexing optical transmitter with the IP address corresponding to the area code information, wherein the destination port number of the UDP message corresponds to the planning frequency point of the IPQAM system.
8. The VOD video-on-demand system according to claim 6, wherein the playing module specifically comprises:
the new building and maintenance unit is used for establishing and maintaining a mapping table of a frequency point and a channel address by the broadcast data stream multiplexing optical transmitter, so that the compatibility of the existing IPQAM system is realized;
the broadcasting unit is used for broadcasting the data stream and multiplexing the optical transmitter to send the received video stream into a corresponding multicast channel according to the mapping table of the frequency point and the communication address; and after receiving the VOD reply message from the VOD server, the set top box converts the frequency point information into a channel address and reports the channel address to the network receiving tuner, and the network receiving tuner filters the video program to be requested according to the multicast address and the port number in the channel address and plays the video program by the set top box.
9. A communication transmission apparatus comprising a memory and a processor, and a computer program stored on the memory and executable on the processor, characterized in that the processor, when executing the program, implements the method according to any of claims 1-4.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113965783A (en) * | 2021-09-14 | 2022-01-21 | 广西广播电视信息网络股份有限公司 | Method for realizing VOD playing of ten-gigabit-capable channel by using I-PON standard |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2200202A1 (en) * | 2008-12-19 | 2010-06-23 | Nokia Siemens Networks OY | Method apparatus network and system for establishing an optical communication link for wavelength division multiplexing transmission |
| CN104469535A (en) * | 2014-11-26 | 2015-03-25 | 鼎点视讯科技有限公司 | Broadcast video IP method and device based on C-DOCSIS system |
| CN106375791A (en) * | 2016-09-29 | 2017-02-01 | 深圳市茁壮网络股份有限公司 | Video on demand method and office end |
| CN107071517A (en) * | 2017-02-20 | 2017-08-18 | 北京吉视汇通科技有限责任公司 | Video on-demand system |
-
2020
- 2020-05-06 CN CN202010370350.2A patent/CN111654760A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2200202A1 (en) * | 2008-12-19 | 2010-06-23 | Nokia Siemens Networks OY | Method apparatus network and system for establishing an optical communication link for wavelength division multiplexing transmission |
| CN104469535A (en) * | 2014-11-26 | 2015-03-25 | 鼎点视讯科技有限公司 | Broadcast video IP method and device based on C-DOCSIS system |
| CN106375791A (en) * | 2016-09-29 | 2017-02-01 | 深圳市茁壮网络股份有限公司 | Video on demand method and office end |
| CN107071517A (en) * | 2017-02-20 | 2017-08-18 | 北京吉视汇通科技有限责任公司 | Video on-demand system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113965783A (en) * | 2021-09-14 | 2022-01-21 | 广西广播电视信息网络股份有限公司 | Method for realizing VOD playing of ten-gigabit-capable channel by using I-PON standard |
| CN113965783B (en) * | 2021-09-14 | 2024-05-31 | 广西广播电视信息网络股份有限公司 | Method for realizing VOD playing millions of channels by using I-PON standard |
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