CN107071517B - Video-on-demand system - Google Patents
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- CN107071517B CN107071517B CN201710090794.9A CN201710090794A CN107071517B CN 107071517 B CN107071517 B CN 107071517B CN 201710090794 A CN201710090794 A CN 201710090794A CN 107071517 B CN107071517 B CN 107071517B
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- 239000013307 optical fiber Substances 0.000 claims description 17
- 239000000835 fiber Substances 0.000 claims description 14
- 239000000284 extract Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 abstract description 27
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Classifications
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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
- H04N21/643—Communication protocols
- H04N21/64322—IP
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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]
- H04N21/20—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
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/22—Adaptations for optical transmission
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The present disclosure relates to a video-on-demand system, which includes: the transmitter converts the frequency point of the audio-video data stream of the selected content received from the front-end system into a combination of a UDP port and an IP address, converts the audio-video data stream into a first audio-video data stream based on UDP/IP according to the combination of the UDP port and the IP address, and sends the first audio-video data stream to the set-top box through a one-way channel; and the set-top box receives the frequency points of the audio and video data streams of the selected content from the front-end system through the bidirectional channel, converts the frequency points into a combination of a UDP port and an IP address according to the same mode as the transmitter, and selects and plays the first audio and video data streams which are consistent with the UDP port and the IP address obtained by conversion of the set-top box from the data received through the unidirectional channel. The video-on-demand system can be separated from the traditional modulation and demodulation technology, eliminates the transmission rate bottleneck of a single radio frequency point, and improves the bandwidth of a single program.
Description
Technical Field
the present disclosure relates to the field of communications technologies, and in particular, to a video-on-demand system.
Background
The video-on-demand system generally comprises a front-end system, a transmission network and a user set-top box. In terms of transmission networks, cable operators traditionally use coaxial cables at the subscriber end to transmit radio frequency signals carrying program information. Over time, this technique faces more and more problems:
1. The total data rate that current transmission technology based on coaxial cable can transmit is 3Gbps, and with the introduction of new services including high definition, 4K, 8K, VR and the like in the field of broadcasting and television, the improvement of video quality, the introduction of interactive services such as VOD and the like, and the simulcast of standard definition and high definition programs at present, the total bandwidth is seriously insufficient.
2. The maximum data transmission rate of a single frequency point on the coaxial cable is 38Mbps, the transmission rate required by the current high-quality 4K program is more than 40Mbps, and the rate is obviously insufficient.
disclosure of Invention
In view of the above, the present invention provides a video-on-demand system, which can increase the total system bandwidth and the bandwidth of a single program.
In view of this, the present disclosure provides a video-on-demand system, which includes: the transmitter converts the frequency point of the audio-video data stream of the selected content received from the front-end system into a combination of a UDP port and an IP address, converts the audio-video data stream into a first audio-video data stream based on UDP/IP according to the combination of the UDP port and the IP address, and sends the first audio-video data stream to the set-top box through a one-way channel; and the set-top box receives the frequency point of the audio and video data stream of the selected content from the front-end system through the bidirectional channel, converts the frequency point into a combination of a UDP port and an IP address according to the same mode as the transmitter, and selects and plays a first audio and video data stream which is consistent with the UDP port and the IP address obtained by conversion of the set-top box from the data received through the unidirectional channel.
in a possible implementation manner, the transmitter is an optical transmitter, the set-top box is a fiber-optic set-top box, and the unidirectional channel is a unidirectional channel based on an optical fiber.
In one possible implementation, the bidirectional channel is a bidirectional network channel.
In one possible implementation, the front-end system is a VOD video-on-demand system, and the set-top box includes a VOD client configured to convert the frequency points received via the bidirectional channel into a combination of a UDP port and an IP address.
In a possible implementation manner, the transmitter is connected to the VOD video-on-demand system through an IPQAM data interface and a control interface, and the transmitter extracts a frequency point of an audio-video data stream from the control interface.
In a possible implementation manner, the transmitter converts the frequency point into a combination of a UDP port and an IP address according to a mapping rule, generates a UDP header and an IP header according to the UDP port and the IP address, and encapsulates the UDP header and the IP header and a received audio and video data stream into a first audio and video data stream; and the set-top box receives the frequency point of the audio and video data stream of the selected content from a front-end system through a bidirectional channel, and converts the frequency point into a combination of a UDP port and an IP address according to a mapping rule consistent with the transmitter.
In one possible implementation manner, the optical transmitter is connected to the fiber set top box through a gigabit optical fiber to form a unidirectional channel, the optical transmitter converts the first audio/video data stream into a gigabit optical signal and transmits the gigabit optical signal to the fiber set top box through the gigabit optical fiber, and the fiber set top box includes a gigabit optical fiber receiver for receiving the gigabit optical signal.
in one possible implementation manner, the tera optical fiber receiver selects the tera optical signals in accordance with the UDP port and the IP address converted by the VOD client from the received tera optical signals.
in one possible implementation, the mapping rule includes: frequency point F is converted to the following IP address: 238.238.a.b, and the following UDP ports: a256 + B; wherein, a ═ F-50 × 10/256, B ═ F-50 × 10% 256,% is remainder operation. A, B two 8-bit unsigned integers can be obtained through the mapping.
therefore, by canceling the modulation and demodulation technology, the transmitter and the set-top box convert the frequency point of the content selected by the user into a UDP port and IP address combination in the same way, the set-top box receives the audio and video data stream sent by the transmitter and searches for and acquires the corresponding audio and video stream according to the UDP port and the IP address combination for on-demand, the video on-demand system according to the embodiment of the disclosure can be separated from the traditional modulation and demodulation technology, the problems of frequency point interference and maintenance of radio frequency indexes are avoided, the transmission rate bottleneck of 38Mbps of a single radio frequency point is eliminated, the available transmission rate of a single user or a single program is increased to 100Mbps to 1Gbps, the bandwidth requirement of a high-quality 4K program can be fully met, and the bandwidth of the single.
other features and aspects of the present disclosure will become apparent from the following detailed description of exemplary embodiments, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments, features, and aspects of the disclosure and, together with the description, serve to explain the principles of the disclosure.
FIG. 1 shows a block diagram of a video-on-demand system according to an embodiment of the present disclosure.
FIG. 2 shows a schematic diagram of a video-on-demand system according to an embodiment of the present disclosure.
fig. 3 shows a schematic diagram of a transmitter encapsulating an audiovisual data stream according to an embodiment of the disclosure.
Detailed Description
Various exemplary embodiments, features and aspects of the present disclosure will be described in detail below with reference to the accompanying drawings. In the drawings, like reference numbers can indicate functionally identical or similar elements. While the various aspects of the embodiments are presented in drawings, the drawings are not necessarily drawn to scale unless specifically indicated.
The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration. Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present disclosure. It will be understood by those skilled in the art that the present disclosure may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present disclosure.
Example 1
Fig. 1 illustrates a block diagram of a video-on-demand system according to an embodiment of the present disclosure, which can be applied to a VOD video-on-demand system or the like. As shown in fig. 1, the system includes:
The transmitter 1 converts the frequency point of the audio-video data stream of the selected content received from the front-end system 2 into a combination of a UDP port and an IP address, converts the audio-video data stream into a first audio-video data stream based on UDP/IP according to the combination of the UDP port and the IP address, and sends the first audio-video data stream to the set-top box 3 through a one-way channel.
And the set-top box 3 receives the frequency points of the audio and video data streams of the selected content from the front end system 2 through the bidirectional channel, converts the frequency points into a combination of a UDP port and an IP address according to the same mode as the transmitter 1, and selects and plays the first audio and video data stream which is consistent with the UDP port and the IP address obtained by conversion of the set-top box 3 from the data received through the unidirectional channel.
As shown in fig. 1, the video-on-demand system may be composed of a head-end system 2, a transmission network, and a Set-Top Box 3(Set Top Box, abbreviated as STB). The front-end system 2 provides the user program, performs management and charging, and so on, and may include systems such as a video server, a disk array, a program playing and controlling device, a program database, and a network management and charging system. The transmission network can be divided into backbone transmission network and user access network, the traditional transmission network converts the user program of IP stream into radio frequency signal through IPQAM, and transmits the radio frequency signal from the front end of the operator to the set-top box in the user's home, and provides the network access of the user; the transmission network of the present disclosure does not convert IP-streamed user programs into rf signals for transmission to the set-top box at the user's home, in a manner described in more detail below. The set-top box 3 at the user end is a bridge for acquiring multimedia information from a network, can be an intelligent digital signal converter, is developing towards a microcomputer, gradually integrates the functions of a television and a computer, and realizes multimedia information services such as video program on demand, digital television broadcasting, electronic commerce and the like through the set-top box 1.
For example, the video On demand system may be a Video On Demand (VOD) system, and the VOD system is an interactive video system capable of ordering programs according to the needs of users, and is currently widely used in the field of radio and television, especially in cable operators. Wherein, the front-end system 2 can be a traditional VOD front-end system based on coaxial, and the transmitter 1 can be positioned at the connection of a backbone transmission network and a user access network; the transmitter 1 is connected with a VOD front-end system, receives audio and video data streams sent by the VOD front-end system, processes (for example, data format conversion, address mapping and the like) the data streams, and then sends the data streams to the set-top box 3 through a user access network, a VOD client can be installed in the set-top box 3 to process and play the audio and video data, the VOD client can be compatible with the traditional coaxial-based VOD front-end system, the VOD client can be connected with the VOD front-end system through a network interface, user authentication and authentication can be carried out through the network interface, video information on the VOD front-end system is obtained, and frequency.
FIG. 2 shows a schematic diagram of a video-on-demand system according to an embodiment of the present disclosure. As shown in fig. 2, the VOD-based video-on-demand system is described as an example, the transmitter 1 may be an optical transmitter, the set-top box 3 may be a fiber-optic set-top box, and the unidirectional channel may be a unidirectional channel based on an optical fiber (e.g., a ten-gigabit optical fiber), that is, the subscriber access network portion may be accessed by ten-gigabit optical fiber. The optical transmitter may be connected to a VOD server in a VOD front-end system, for example, to a CDN (Content Delivery Network, which is a distributed Content Delivery Network built on an IP Network) edge server, that is, the backbone transport Network of the transport Network may be based on an IP Network.
The fiber optic set-top box may include a network interface through which the VOD client communicates with the VOD head-end system, the network interface may form the bidirectional channel through a VOD server connected to the head-end via a network cable. Since the network interface only needs to transmit low-rate interactive information, it can communicate with the VOD front-end system in a variety of other ways, such as: 1. FTTH (Fiber To The Home) access provided by a cable television operator, namely an OLT-ONU mode; 2. network access of a third-party broadband operator; 3. using a 3G/4G data card, access through the mobile operator's network, etc. That is, the bidirectional channel may be implemented by various network methods, which is not limited by the present disclosure.
For example, when a user sends a control signal or the like to the set top box 3 through a device such as a remote controller to select content (e.g., a movie, a live program, etc.) for playing, a VOD client in the set top box 3 starts a play request, and sends a request command to the CDN edge server through a network (a bidirectional channel), where the request command includes an IP address of the set top box, requested content (e.g., program information), and the like. In response to the request command, the CDN edge server may verify the request, for example, perform user authentication, etc.; the CDN edge server may allocate a played UDP port to the user according to the program content requested by the user, where the UDP port may correspond to frequency point information of playing of the program content, for example, the CDN edge server allocates a corresponding UDP port to the program content requested by the user according to the configuration information of the IPQAM, and the UDP port and the playing frequency point are corresponding. The CDN edge server encapsulates the audio/video data in an appropriate packet form, for example, into ts (transport stream) packets, adds a UDP header to the ts packets to generate UDP packets, and outputs the UDP packets to the transmitter 1 through the IP network in an IP manner. The CDN edge server may further send, in response to the request command, frequency point information corresponding to the program content to the set top box 3 through the bidirectional channel, and the VOD client receives the frequency point information.
In a possible implementation, the transmitter 1 is compatible with a conventional coaxial-based VOD front-end system, that is, a data interface and a control interface of an original IPQAM are maintained, taking a VOD optical transmitter as the transmitter 1 as an example, the VOD optical transmitter may be regarded as an IPQAM in the view of the VOD front-end system, and may be connected to the VOD front-end system through the IPQAM data interface and the control interface, and the transmitter 1 extracts a frequency point of an audio-video data stream from the control interface. For example, the CDN edge server may respond to a user request, transmit a UDP packet to the transmitter 1 through the IP network, and a control interface of the transmitter 1 may extract a frequency point corresponding to the program content according to UDP port information of a UDP packet header, and decapsulate the UDP packet to obtain a TS data packet of the audio/video data stream.
The transmitter 1 converts the frequency point into a combination of a UDP port and an IP address after obtaining the frequency point corresponding to the program content, where the conversion is set for the set-top box to conveniently search for the audio and video data stream corresponding to the program content. The UDP port and the IP address obtained by conversion are different from the actual UDP port distributed by the CDN edge server, and no equipment physically corresponding to the UDP port and the IP address is provided, so that the data transmission based on UDP/IP can be realized, the problem of carrying frequency point information is solved skillfully, and the audio and video data stream can be transmitted by carrying the frequency point information without modulating the audio and video data stream.
In a possible implementation manner, the transmitter 1 may convert the frequency point into a combination of a UDP port and an IP address according to a certain mapping rule; the set-top box 3 receives the frequency points of the audio and video data streams of the selected content from the front-end system 2 through a bidirectional channel, and converts the frequency points into a combination of a UDP port and an IP address according to a mapping rule consistent with the transmitter 1.
For example, the mapping rules may include:
Frequency point F is converted to the following IP address: 238.238. a.b. the first,
And the following UDP ports: a256 + B;
Wherein, A ═ F-50 ═ 10/256, B ═ F-50 ═ 10% 256,% is the remainder operation; the frequency point F can be between 50MHz and 850MHz, and one digit after the decimal point is taken.
The mapping rules can be set in the transmitter 1 and the set-top box 3 in advance, and the transmitter 1 and the set-top box 3 convert the frequency points according to the mapping rules to obtain corresponding UDP ports and IP addresses, so that the set-top box 3 can obtain program contents corresponding to the frequency points, the problem of carrying frequency point information is well solved, and audio and video data streams can be transmitted without radio frequency.
it should be noted that, although the above mapping rule is taken as an example to describe the manner of converting the frequency point to the IP address and the UDP port, those skilled in the art can understand that the disclosure should not be limited thereto. In fact, the user can set the mapping rule flexibly according to personal preference and/or practical application scenario, as long as the IP address and UDP port converted by the transmitter 1 and the set-top box 3 via the mapping rule meet the logic and engineering requirements, for example, the range of A, B is between 0 to 255.
The transmitter 1 converts the TS data packet of the audio-video data stream into a first audio-video data stream based on UDP/IP according to the combination of the UDP port and the IP address obtained by the conversion, and transmits the first audio-video data stream to the set-top box 3 through the unidirectional channel.
in a possible implementation manner, a VOD client in the set-top box 3 may receive frequency point information sent by the front-end system 2 through a network cable, and convert the frequency point into a combination of a UDP port and an IP address according to the same manner as the transmitter 1, and the set-top box 3 may select, from data received through the unidirectional channel, a first audio-video data stream that is consistent with the UDP port and the IP address obtained by the conversion of the VOD client for playing.
In a transmission mechanism, a traditional VOD video on demand system signal access method is to modulate a baseband signal to a carrier frequency according to a play frequency point to generate an RF signal, and then send the RF signal to a user set top box through an HFC (Hybrid Fiber-Coaxial) network, and the user set top box selects a corresponding RF signal to play according to the received frequency point information. The maximum data transmission rate of a single frequency point on the coaxial cable is 38Mbps, and the bandwidth of a single program is limited.
In the embodiments of the present disclosure, an entry way of transmitting signals by using a modulation and demodulation technology is cancelled on the basis of the original video on demand system, and in order to solve the problem that the set-top box searches for and selects audio and video data streams corresponding to the content selected by the user, the transmitter and the set-top box convert the frequency point of the content selected by the user into a UDP port and IP address combination in the same way, and the set-top box receives the audio and video data streams sent by the transmitter and selects a corresponding audio and video stream according to the UDP port and IP address combination for on demand. The UDP port and the IP address obtained through conversion are set for the set-top box to conveniently search the audio and video data stream corresponding to the program content, are not used for exchange and routing, and have no equipment physically corresponding to the set-top box. The audio and video data stream is transmitted based on the UDP/IP protocol without establishing connection in advance, the transmission efficiency is high, and the transmission rate is improved. According to the video-on-demand system disclosed by the embodiment of the disclosure, the traditional modulation and demodulation technology can be separated, the problems of frequency point interference and maintenance of radio frequency indexes do not exist, the transmission rate bottleneck of 38Mbps of a single radio frequency point is eliminated, the available transmission rate of a single user or a single program is increased to 100Mbps to 1Gbps, the bandwidth requirement of a high-quality 4K program can be fully met, and the bandwidth of the single program is increased.
In a possible implementation manner, the transmitter 1 may convert the frequency point into a combination of a UDP port and an IP address according to a mapping rule, generate a UDP header and an IP header according to the UDP port and the IP address, and encapsulate the UDP header and the IP header and the received audio and video data stream into a first audio and video data stream.
Fig. 3 shows a schematic diagram of a transmitter encapsulating an audiovisual data stream according to an embodiment of the disclosure. As shown in fig. 3: the transmitter 1 decapsulates the received UDP packet to obtain a TS packet of the audio/video data stream, where the TS packet may include audio/video data and a header, and adds a UDP header to the header of all the TS packets according to the UDP port obtained by the transmitter 1 through frequency point conversion, where the UDP header may be a header generated according to the UDP port and includes information such as a target port and a length of a datagram; before the UDP header, an IP header is added according to the IP address obtained by the transmitter 1 through frequency point conversion to generate an IP datagram, where the IP header may be an IP header generated according to the IP address and includes a source IP address and a destination IP address. The transmitter 1 may convert the received audio-visual data stream into a first audio-visual data stream in the above manner, and send the first audio-visual data stream to the corresponding set-top box 3 through the unidirectional channel.
In another possible implementation, as shown in fig. 2, the optical transmitter connects the fiber-optic set-top box through a gigabit optical fiber to form a unidirectional channel, and the optical transmitter converts the first audio-video data stream into a gigabit optical signal and transmits the gigabit optical signal to the fiber-optic set-top box through the gigabit optical fiber. The specific conversion mode may be that the first audio-video data stream is converted from an electrical signal to a tera optical signal by an optical module, such as a laser, and the tera optical signal is transmitted to the fiber set top box through the tera optical fiber. The tera optical signals herein may refer to ethernet signals transmitted at a rate of 10Gbps or more, including signals conforming to 10G, 40G, and 100G ethernet standards, and the like. A tera-fiber may be included in a transmission network that may carry a variety of the tera-optical signals described above.
In another possible implementation, the fiber set-top box may include a gigabit fiber receiver configured to receive the gigabit optical signal, where the gigabit fiber receiver converts the gigabit optical signal into an electrical signal through inverse transformation, for example, through a photosensor, and then selects a first audio/video stream data that is consistent with the UDP port and the IP address converted by the set-top box 3; alternatively, the tera optical signals corresponding to the UDP port and the IP address converted by the set-top box 3 may be selected from the received tera optical signals, and then converted into electrical signals by inverse transformation.
in a possible implementation manner, a client in the set-top box 3 receives frequency point information sent by a front-end system 2 through a network cable, and converts the frequency point into a combination of a UDP port and an IP address in the same manner as the transmitter 1, and the gigabit optical fiber receiver selects a corresponding gigabit optical signal according to the combination of the UDP port and the IP address obtained by the client conversion, for example, selects a gigabit optical signal consistent with the UDP port and the IP address obtained by the VOD client conversion.
In a possible embodiment, the set-top box 1 further includes a video decoder, which decodes the selected first audio/video stream data to restore an audio/video signal, and displays the audio/video signal through a terminal, such as a television.
The video-on-demand system transmits by using the gigabit optical fiber at the user-in end, uses the UDP port and the IP address obtained by frequency point mapping as the UDP header and the IP header, directly converts the user program to the gigabit optical signal without radio frequency, so that the total transmission rate of the system is increased from coaxial less than 3Gbps to 10Gbps, 40Gbps and 100Gbps, and the total system bandwidth is increased. The transmission rate bottleneck of a single radio frequency point of 38Mbps is eliminated, the available transmission rate of a single user or a single program is increased to 100Mbps to 1Gbps, the bandwidth requirement of a high-quality 4K program can be fully met, the bandwidth of the single program is increased, IPQAM and coaxial cables in a traditional cable television transmission network are eliminated, and the cost of the single user is reduced to 1/3 to 1/10.
Various aspects of the present disclosure are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the disclosure. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer-readable program instructions.
These computer-readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer-readable program instructions may also be stored in a computer-readable storage medium that can direct a computer, programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer-readable medium storing the instructions comprises an article of manufacture including instructions which implement the function/act specified in the flowchart and/or block diagram block or blocks.
the computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other devices to cause a series of operational steps to be performed on the computer, other programmable apparatus or other devices to produce a computer implemented process such that the instructions which execute on the computer, other programmable apparatus or other devices implement the functions/acts specified in the flowchart and/or block diagram block or blocks.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
having described embodiments of the present disclosure, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.
Claims (9)
1. A video-on-demand system, comprising:
The transmitter converts the frequency point of the audio-video data stream of the selected content received from the front-end system into a combination of a UDP port and an IP address, converts the audio-video data stream into a first audio-video data stream based on UDP/IP according to the combination of the UDP port and the IP address, and sends the first audio-video data stream to the set-top box through a one-way channel;
And the set-top box receives the frequency point of the audio and video data stream of the selected content from the front-end system through the bidirectional channel, converts the frequency point into a combination of a UDP port and an IP address according to the same mode as the transmitter, and selects and plays a first audio and video data stream which is consistent with the UDP port and the IP address obtained by conversion of the set-top box from the data received through the unidirectional channel.
2. The video-on-demand system according to claim 1, wherein the transmitter is an optical transmitter, the set-top box is a fiber-optic set-top box, and the unidirectional channel is a fiber-based unidirectional channel.
3. The video-on-demand system according to claim 1, wherein the bidirectional channel is a bidirectional network channel.
4. The video-on-demand system according to claim 2,
The head-end system is a VOD video-on-demand system,
The set-top box includes a VOD client for converting the frequency points received via the bidirectional channel into a combination of a UDP port and an IP address.
5. a video-on-demand system according to claim 4,
The transmitter is connected with the VOD video-on-demand system through an IPQAM data interface and a control interface, and the transmitter extracts frequency points of audio and video data streams from the control interface.
6. The video-on-demand system according to claim 1,
The transmitter converts the frequency point into a combination of a UDP port and an IP address according to a mapping rule, generates a UDP header and an IP header according to the UDP port and the IP address, and encapsulates the UDP header and the IP header and the received audio and video data stream into a first audio and video data stream;
And the set-top box receives the frequency point of the audio and video data stream of the selected content from a front-end system through a bidirectional channel, and converts the frequency point into a combination of a UDP port and an IP address according to a mapping rule consistent with the transmitter.
7. A video-on-demand system according to claim 4,
the optical transmitter is connected with the optical fiber set top box through a gigabit optical fiber to form a one-way channel,
The optical transmitter converts the first audio-video data stream into a tera optical signal and transmits the tera optical signal to the fiber optic set top box through the tera optical fiber,
The fiber optic set top box includes a gigabit fiber optic receiver for receiving the gigabit optical signal.
8. The video-on-demand system according to claim 7,
And the tera optical fiber receiver selects the tera optical signals which are consistent with the UDP port and the IP address obtained by the conversion of the VOD client from the received tera optical signals.
9. The video-on-demand system according to claim 6, wherein the mapping rule comprises:
Frequency point F is converted to the following IP address: 238.238.A.B
And the following UDP ports: a256 + B;
Wherein, a ═ F-50 × 10/256, B ═ F-50 × 10% 256,% is remainder operation.
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| CN109729299A (en) * | 2019-01-25 | 2019-05-07 | 深圳市朗强科技有限公司 | A kind of sending, receiving method and device of ultra high-definition video |
| CN112468848A (en) * | 2019-08-19 | 2021-03-09 | 中兴通讯股份有限公司 | Method, device and system for realizing policy scheduling |
| CN111654760A (en) * | 2020-05-06 | 2020-09-11 | 上海云则信息技术有限公司 | VOD video interactive on-demand method and system |
| CN115102799A (en) * | 2021-03-04 | 2022-09-23 | 北京吉视汇通科技有限责任公司 | Bidirectional data service processing method and system based on I-PON |
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