CN101015191A - System for layering content for scheduled delivery in a data network - Google Patents
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Abstract
System for layering content for scheduled delivery in a data network. A method is provided for transmitting content to one or more receiving terminals from a distribution server in a data network. The method includes encoding the content into a base layer and one or more enhancement layers, and transmitting the base layer to the one or more receiving terminals. The method also includes receiving a request from at least one receiving terminal to receive one or more enhancement layers, and transmitting the one or more enhancement layer to the at least one receiving terminals.
Description
Priority request according to 35 U.S.C. § 119
That present patent application requires is that on July 9th, 2004 submitted to, exercise question is the provisional application No.60/586 of " System forLayering Content for Scheduled Delivery in a DATA Network ", 820 priority, this application has transferred the application's assignee, and by reference it is incorporated into herein hereby.
Technical field
Present invention relates in general under network environment, transmit content (that is, the multimedia resource and the digital information of other form after the original or compression), and relate in particular to and be used for content is carried out layering to dispatch the system of transmission at data network.
Background technology
Data network, for example cordless communication network or wired Internet must weighed between the service of great amount of terminals at the service and the broadcast/multi broadcast of single terminal end specially.The major issue that many existing and following application will overcome is to transmit content with reliable mode to the client computer of a large amount of autonomies with gradable.For example, in one application, the webserver sends video/audio content to many network terminals, and wherein the number of terminal may be on the order of magnitude of hundreds of or several thousand.These terminals can be received on the network via various wired and/or wireless radio link technical batterys.
In data network, permitted the restriction that various types of information than conventional is subjected to the time consumingly.Become available in certain a little information in time point place, it is remained valid/last state in certain time cycle, but expires upgrading the time spent afterwards then.Some general example with information of this specific character are news, weather forecast and share price.When transmitting the information of this time-sensitive to the user, any postponing a meeting or conference when remarkable sharply reduced the value of these information, and even may make it utterly useless.
Therefore, for any electronic information dissemination system, an important target is in time to give the end user (that is, client computer, consumer) distribution of information.This means, successful system design should be able to information can with after and its effectively/last state transmits this information as early as possible fast in life cycle.(for example have limited resources, content stores-retrieval handling capacity, transmission server capacity, transmission network/channel width or the like, and be a large amount of client service) the representative condition of information distribution system under, reach this target and become a kind of real challenge.Another important complex situations have been produced for the additional demand that realizes gratifying (pleasant) user experience simultaneously.Obviously, the main composition of " good " user experience partly is the timely and effective property for the information of consumption.Almost always unacceptable for satisfying this demand, simultaneously unexpected time delay is had very little tolerance.Because in fact all information all can be used as content of multimedia, the displaying quality of another important component part of the especially content of multimedia of acoustic image form, so overall customer experience and the content of these forms interrelates.From this viewpoint, at main level, the information that is in its form of showing should be understood easily, and need not any irrational work of end user.
Yet conventional system fails to provide this quality-class in the mode of bandwidth-efficient to a large amount of receiving terminals.In addition, the receiving terminal of many types has storage, power and the treatment limits that conventional system is not enough to solve.For example, can utilize the bandwidth of sharing in the transmission medium (very Bao Gui resource), receive channel, storage and other device resource of equipment to send a large amount of contents to equipment.Yet if this content is not watched in equipment user's decision, a large amount of like this content of transmission has just been wasted valuable equipment and system resource so.
Therefore, need a kind of gradable content transmission system that is used for sending to a large amount of receiving terminals content at data network.Because transmission may occur on the expensive air link resources,, and to consider transmission bandwidth efficient so this transmission system must not only be considered the life cycle of content.In addition, a given fixed-bandwidth communication channel, this system should provide content to receiving terminal as much as possible.In addition, should be minimized at the amount of bandwidth of on uninterested receiver transmission content, being wasted.
Summary of the invention
In one or more embodiment, provide a kind of gradable transmission system that is used for sending to one or more receiving terminals efficiently content.Described system provides a kind of flexible framework, optimizes packet scheduling to allow rate distortion (rate-distortion).Support this framework by utilizing suitable grouping correlation that content stream is carried out precoding, described suitable grouping correlation may be adapted to transmission channel (that is channel self-adapting grouping correlation control).In one embodiment, described system is used to distinguish the order of priority of encoded content and it is divided into predetermined group or layer, and time division multiplexing is carried out in their scheduling transmission.
So, in one or more embodiment, described transmission system comprises a framework, wherein, utilizes gradable multimedia (audio frequency, video, image, figure) compression algorithm to improve the operating efficiency based on the information distribution system of the clean culture of dispatching (or multicast of scheduling).As a result, can be increase end user's service of number, and not need the system resource of adding, and reduce the percentage of the transmission bandwidth that is wasted, improve total operating efficiency thus.In addition, obtained these efficient and strengthened, kept displaying quality-class simultaneously for all users acceptable (in essence, initial).
In one embodiment, provide a kind of method, be used for sending content from Distributor to one or more receiving terminals at data network.Described method comprises that be a basic layer and one or more enhancement layer to described content encoding, and sends described basic layer to described one or more receiving terminals.Described method also comprises the request that receives the one or more enhancement layers of requirement reception from least one receiving terminal, and sends one or more enhancement layers to described at least one receiving terminal.
In one embodiment, provide a kind of device, be used for sending content from Distributor to one or more receiving terminals at data network.Described device comprises that being used for described content encoding is the processing logic of a basic layer and one or more enhancement layers, and the transmission logic that is used for sending to described one or more receiving terminals described basic layer.Described device also comprises the receive logic that is used for receiving from least one receiving terminal the request that requires the one or more enhancement layers of reception, and the logic that is used for sending to described at least one receiving terminal one or more enhancement layers.
In one embodiment, provide a kind of device, be used for sending content from Distributor to one or more receiving terminals at data network.Described device comprises that being used for described content encoding is the module of a basic layer and one or more enhancement layers, and the module that is used for sending to described one or more receiving terminals described basic layer.Described device also comprises the module that is used for receiving from least one receiving terminal the request that requires the one or more enhancement layers of reception, and the module that is used for sending to described at least one receiving terminal one or more enhancement layers.
In one embodiment, provide a kind of computer-readable medium that comprises instruction, when the processing logic of described instruction in being distributed server carried out, be used for sending content to one or more receiving terminals at data network.Described computer-readable medium comprises that being used for described content encoding is the instruction of a basic layer and one or more enhancement layers, and the instruction that is used for sending to described one or more receiving terminals described basic layer.Described computer-readable medium also comprises the instruction that is used for receiving from least one receiving terminal the request that requires the one or more enhancement layers of reception, and the instruction that is used for sending to described at least one receiving terminal one or more enhancement layers.
In one embodiment, provide a kind of method, be used for receiving the content that sends from Distributor at data network operation receiving terminal.Described method comprises the basic layer of received content, and determines to need one or more enhancement layers so that present described content with the quality that strengthens.Described method also comprises sending to Distributor and requires the request of described one or more enhancement layers, and receives described one or more enhancement layer.Described method also comprises uses described basic layer and described one or more enhancement layer to present described content, with the quality of the enhancing that obtains to expect.
Read after accompanying drawing summary, detailed description and the claim of hereinafter statement, others of the present invention, advantage and feature will become apparent.
Description of drawings
In conjunction with the drawings with reference to following detailed description, above-mentioned aspect of the embodiments described herein and the advantage of following will become more apparent, in the accompanying drawings:
Fig. 1 illustrates the network of an embodiment who comprises content transmission system;
Fig. 2 is illustrated in the functional block diagram of the server that uses among the embodiment of content transmission system;
Fig. 3 is illustrated among the embodiment of content transmission system, is used for the embodiment of method of the server of application drawing 2;
Fig. 4 is illustrated in the functional block diagram of the receiving terminal that uses among the embodiment of content transmission system; And
Fig. 5 is illustrated among the embodiment of content transmission system, is used for the embodiment of method of the receiving terminal of application drawing 4.
Embodiment
The embodiment of gradable content transmission system has been described in following detailed description, and it is used for transmitting content from send server to great amount of terminals efficiently.This system is adapted at using in the wired or wireless network of any type, and described network includes, but are not limited to: communication network, such as the such public network in internet, such as the such dedicated network of VPN(Virtual Private Network), local area network (LAN), wide area network, long-range network or the data network of other type arbitrarily.
In one or more embodiment, described transmission system is used to use graduated encoding, content-data is cut apart and is encoded to a plurality of content layers.Hierarchical coding (being also referred to as " hierarchical coding ") is such processing procedure, promptly, generate the compression expression of content with the form of hierarchical data structure, make according to this data structure, can produce a plurality of reconstructions, when wherein said a plurality of reconstructions have variation empty and/or signal (SNR) fidelity level to described content.Hierarchical data structure is divided into the two big classes that are called " substantially " layer and " enhancing " layer.Basic layer is in the bottom of hierarchical structure, and is used to all reconstructions of content.One or more enhancement layers are formed the residue rank of hierarchical structures, and each enhancement layer is configured to the progressively improvement to content reconstruction, and the reconstruction of content is to realize by all layers below the arbitrfary point that is incorporated in hierarchical structure (comprising basic layer).
About some signal attribute of content, only basic layer being decoded provides main level other reconstruction quality.If also one or more enhancement layers are decoded, will strengthen reconstruction quality so about the predefine attribute, make it surpass the reconstruction quality of only basic layer being decoded and being reached.Usually, the reconstruction quality that is reached is the function of the number of decoded layer.For example, in one embodiment, the content of multimedia of original audio, video format or the media information of other form are encoded or code conversion (that is, wherein the input coding form is different with the output encoder form), to realize compression and gradable.Output comprises that a plurality of content layers of the data that are encoded, described a plurality of content layers comprise a basic layer and one or more enhancement layer, and these layers can optionally be sent to one or more receiving terminals, then in terminal, content is decoded and is presented.
In one or more embodiment, this transmission system is used for allowing each receiving terminal to determine such processing procedure of the quality-class of the content that it receives, and sends the part or all of of content layer to one or more receiving terminals.For example, each terminal receives basic layer, and can randomly ask one or more enhancement layers, to obtain the quality-class to the expectation of this content.So this system is used to each terminal that its desired service quality is provided, while maximization network efficient, this is because only to asking those terminals of enhancement layer to send enhancement layers.
Fig. 1 illustrates the data network 100 of an embodiment who comprises content transmission system.Network 100 comprises server 102, data network 104 and a plurality of terminals shown in 106 (1 to X).Data network 104 can be the wired or wireless network that allows to send to terminal 106 from server 102 any type of data.Terminal can be the receiving equipment of any type, and it includes, but are not limited to portable phone, handheld device, notebook, desktop computer or the equipment that can receive network service of other type arbitrarily.Terminal is used can comprise that the communication channel 108 of wired or wireless communication link communicates with data network.For example, in one embodiment, terminal is the radio telephone that communicates via radio communication channel and network 104.
In one embodiment, server 102 sends basic layer (B) to all receiving terminals (1-X).Should allow each terminal to present this content by basic layer (B), and allow each terminal decision whether to need extra quality with acceptable quality-class.
Receive after the basic layer, terminal can send request to server 102 arbitrarily, requires to receive one or more enhancement layers, so that can present this content with better quality.For example, shown in 116, terminal 3 sends a request to server 102, to ask first enhancement layer (E1).In response to this request, server 102 sends this enhancement layer (E1) to terminal 3.Similarly, shown in 118 and 120, terminal 1 and terminal X also send request to server 102 respectively, with the request enhancement layer.Server 102 responds this request by sending enhancement layer E1 and E2 to terminal X and sending all enhancement layers to terminal 1.
Receive after the enhancement layer, the higher quality of quality that terminal 1,3, the enough ratios of X energy only adopt enhancement layer B to reach presents this content.Enhancement layer is used to improve the quality of audio frequency, video or other content characteristic.In one or more embodiment, the content layer function is as follows.
Basic layerComprise the compressed content data that satisfy minimum service and/or performance requirement.
The E1 layerStrengthened the packed data subregion of basic layer service performance.According to reservation, can before consumption, download the E1 enhancement layer and may store it.The example that uses this service is the specific characteristic that the medium that are used to have or do not have relevant copyright management transmit service system, for example, and preferred user's service.
The E2 layerExcept the E1 layer, the packed data subregion that is used to strengthen the property, and it can be associated with optional preference and relevant copyright management.In addition, the E2 enhancement layer can be implemented in download playback progressive under the streaming situation, wherein transmits this layer to sending terminal during playback.
The E3-En layerExcept following E1 and E2 layer, the packed data subregion that is used to strengthen the property.
In one embodiment, the content layer behind the coding is stored in the database, and is available for server 102, dispatches their transmission with content-based life cycle, network state and/or user's requirement.For example, server 102 or third party encode to content and then it are stored in the database.In another embodiment, the content layer behind the coding is sent to server 102 to distribute.
In one embodiment, the number of the enhancement layer that is generated can be the variable of being determined by type and/or any other factors of terminal capabilities, the content that transmitted.In addition, the number of the utilizable enhancement layer of specific receiving terminal depends on performance, network (or channel) state, available bandwidth, expectation throughput and/or any other factors of terminal individuality.
It should be noted that the content transmission system of Fig. 1 has only been represented an embodiment, and other embodiment also is feasible within the scope of the present invention.For example, can be encoded to content layer 114 to content 112, and then, this entity is forwarded to server 102 to this content layer 114 so that send to receiving terminal according to the embodiments described herein by another network entity.Therefore, within the scope of present embodiment, can change and add the system shown in Fig. 1.
Fig. 2 is illustrated in the functional block diagram of the server 102 that uses among the embodiment of content transmission system.Server 102 comprises processing logic 202, device resource 204, content-data 206 and transceiver logic 210, and all these all are coupled on the internal data bus 212.Server 102 also comprises content layer database 208 and enhancement layer request receiver logic 214, and these also are coupled on the data/address bus 212.
In one or more embodiment, processing logic 202 comprises the combination in any of CPU, processor, gate array, hardware logic, memory element, virtual machine, software and/or hardware and software.Therefore, processing logic 202 generally includes the logic of carrying out machine readable instructions.In one embodiment, this processing logic 202 also comprises and is used for content is encoded to produce the codimg logic of one or more content layers.
Device resource and interface 204 comprise hardware and/or the software that allows server 202 and inside and external system to communicate.For example, built-in system can comprise mass-storage system, memory, display driver, modulator-demodulator or other internal device resources.External system can comprise user interface facilities, printer, disc driver or other local device or system.
Content-data 206 expression is stored in content in the memory, that will send to one or more receiving terminals by data network.For example, content-data 206 can comprise audio frequency, video or other content of multimedia, application program or the data of the arbitrary format stored in memory device arbitrarily.
Enhancement layer request receiver logic 214 comprises the combination in any of hardware and software, and is used to receive the enhancement layer request that sends from one or more receiving terminals.Described request is sent by the terminal that hope receives one or more content enhancement layers, therefore, makes it possible to use than only can the higher quality of getable quality presenting associated content with basic layer.For example, in one embodiment, one or more receiving terminals send the enhancement layer request to server 102, and described enhancement layer request is received at transceiver logic 210 places and is forwarded to request receiver logic 214 then.In response, this logic 214 is fetched requested enhancement layer from content data base 208, sends the enhancement layer of being fetched to the requesting terminal via transceiver 210 then.
In the operating process of an embodiment of server 102, the codimg logic of processing logic 202 is used for content-data 206 is handled to produce the content layer behind the coding.For example, the graduated encoding technology can be used to content-data is encoded to form content layer arbitrarily.Being used to of having described below that processing logic 202 can carry out produces several graduated encoding technology of the content layer behind the coding.
Graduated encoding
In one or more embodiment, described system is suitable for various data files or out of Memory hierarchical coding are basic layer and enhancement layer as described herein.Such data file includes, but are not limited to such as the such multi-media signal of video, audio frequency, image and graphical information.Provide brief description with the lower part to scalable video and audio coding.Yet, it should be noted that this system can be used for information signal to any type in fact and carries out hierarchical coding and send.
Gradable video encoding
The brief list that utilizes maximum vision signal attributes under the situation of graduated encoding below is provided.
Spatial resolutionGradable spatial allows decoder that a subclass (basic layer adds zero or more enhancement layers) of whole bit stream is decoded, so that rebuild and display video data with different spatial resolution (being frame length);
Temporal resolutionTemporal scalability allows decoder that a subclass (basic layer adds zero or more enhancement layers) of whole bit stream is decoded, so that rebuild and display video with different temporal resolution (that is frame per second);
The sampling fidelityThe gradable permission decoder of sampling fidelity is decoded to a subclass (basic layer adds zero or more enhancement layers) of whole bit stream, so that rebuild and display video with different signal to noise ratio (snr) levels;
The video object level fidelityObject-based gradable permission decoder is decoded to a subclass (basic layer adds zero or more enhancement layers) of whole bit stream, so that, constitute the complexity level with different pictures and rebuild and display video with respect to number simultaneously decoded and the independent vide object that presents.
ColourityAlso can utilize colourity (colouring information of vision signal) double sampling pattern to generate gradable bit stream, although this method is more rare in practice.
Data are cut apartCompare with other graduated encoding scheme, it is a kind of hierarchical coding technology of very low complex degree that data are cut apart, and it is applicable to the prioritised transmission of packed data especially well.The data segmentation framework individual layer can not the classification codec bit stream separated into two parts (MPEG-2 video and MPEG-4 video) or three parts (H.264).First is included in most important information field in the original bit stream, for example, and head, quantization parameter, motion vector and low order DCT coefficient.Other parts comprise remaining not too important information, for example, and high-order DCT coefficient.
It should be noted that the gradable pattern of monolithic video except introducing above, when generating gradable expression, perhaps the scalable bit stream encoder can merge more than a kind of gradable pattern of using, and for example service time and sampling fidelity are gradable simultaneously.In the back in this case, and usually, can provide dissimilar enhanced layer information in different enhancement layers, perhaps two kinds (all) dissimilar enhanced layer information can be embedded in the single enhancement layer.
Scalable audio coding
The brief list that utilizes maximum audio signal attributes under the situation of graduated encoding below is provided.
Sample rateThe gradable permission decoder of sample rate is decoded to a subclass (basic layer adds zero or more enhancement layers) of whole bit stream, so that rebuild and audio plays with different sample rates.
The sampling fidelityThe gradable permission decoder of sampling fidelity is decoded to a subclass (basic layer adds zero or more enhancement layers) of whole bit stream, so that rebuild and audio plays with different signal to noise ratio (snr) levels.
BandwidthThe gradable permission decoder of bandwidth is decoded to a subclass (basic layer adds zero or more enhancement layers) of whole bit stream, so that rebuild and audio plays with different frequency spectrum fidelity (that is low-pass cut-off frequencies).
Channel architectureAbout the gradable permission decoder of channel architecture a subclass (basic layer adds zero or more enhancement layers) of total bit stream is decoded, so that rebuild and audio plays with different channel formations (monophony is to stereo) or the possible more number of channel (for example 5.1).
Data are cut apartUtilize and the similar mode of video coding of distinguishing order of priority, data cut apart can be applied to individual layer can not the classification audio codec in, with the simple layer representation of acquisition audio compressed data.
It should be noted that the gradable pattern of monolithic audio frequency except introducing above, when generating gradable expression, perhaps the scalable bit stream encoder can merge more than a kind of gradable pattern of using, and for example uses sampling fidelity and bandwidth gradable simultaneously.In the back in this case, and usually, can provide dissimilar enhanced layer information in different enhancement layers, perhaps two kinds (all) dissimilar enhanced layer information can be embedded in the single enhancement layer.
The processing of replacement form and those processing similar to above-mentioned processing can be applied to the multimedia and the general digital information of video, audio frequency and other form, to obtain the layer representation for these data.Especially, spatial resolution, sampling fidelity, object level fidelity, chroma format graduated encoding and data are cut apart and are directly applied for image and figure.The utilization of all these layer representation schemes all is within the scope of the present invention.
In one embodiment, produce after the content layer, processing logic 202 control transceivers 210 send basic layer to all receiving terminals.In one embodiment, described content transmission system comprises the program command that is stored in the computer-readable medium, when its processed logic 202 is carried out, is used to provide the function of server 102 as described herein.For example, can be from such as floppy disk, CDROM, storage card, FLASH memory device, RAM, ROM or the such computer-readable medium of the memory device of other type or the computer-readable medium that is connected with server 102 via device resource 204 are loaded into instruction the server 102 arbitrarily.In another embodiment, can instruction be downloaded to server 102 from the Internet resources that are connected with server 102 via transceiver logic 210.At processing logic 202, these instructions are stored in the computer-readable medium, and when its processed logic 202 is carried out, provide the one or more embodiment of content transmission system as described herein.
In one or more embodiment, by carrying out following steps, described transmission system is used for being classified to send content layer to one or more receiving terminals.
A. the data that will send are carried out hierarchical coding comprises a basic layer and one or more enhancement layers with establishment content layer.
B. send basic layer to all receiving terminals.
C. whether each receiving terminal decision needs to use the higher quality of quality than obtaining from basic layer to present this content.
D. need the receiving terminal of higher content quality to send a request, with the enhancement layer of asking to add to server.
E. receive request at server, and in response, fetch requested enhancement layer, and send it to the requesting terminal from database at enhancement layer.
So described content transmission system is carried out above-mentioned steps so that be classified to send content to one or more receiving terminals.As a result, because only transmit the terminal transmission enhancement layer of enhancement layer, so improved the bandwidth and the efficient of network to greatest extent to those requests.In addition, because Qing Qiu equipment is not required storage and/or handles enhancement data, thus the resource of having preserved these equipment.
Fig. 3 illustrates the method for operating 300 of the embodiment that content transmission system has been described.For clear, will describe this method 300 with reference to the server 102 shown in the figure 2, and will suppose that content-data 206 comprises the content that will send to one or more receiving terminals.In one or more embodiment, server 102 comprises and is used for carrying out in the instruction of computer-readable medium program stored to realize the logic (that is, processing logic 202) of following function.
At piece 302, to will in data network, carrying out hierarchical coding to the content that receiving terminal transmits from server.For example, processing logic 202 comprises content 206 is carried out hierarchical coding to produce the codimg logic of content layer 208.Can use graduated encoding technology arbitrarily that this content is encoded and comprise the content layer 208 of a basic layer and one or more enhancement layers with formation.
At piece 304, send basic layer to receiving terminal.For example, processing logic 202 is fetched the basic layer of content layer 208, and control transceiver 210 sends layer substantially to all receiving terminals.This transmission can be used as a multicast transmission or one group of unicast transmission is carried out.
At piece 306, carry out an optional step, wherein,, send one or more enhancement layers to selected receiving terminal based on selected standard.For example, in one embodiment, based on using (that is, content consumption, pattern/statistics/data collection, predetermined contract, equipment and facility registration) the preceding or, sending enhancement layer to terminal based on any other standard.For example, in one embodiment, the resource based on selected receiving terminal can be used sends enhancement layer to described selected terminal.In one embodiment, processing logic 202 determines that selected standard is satisfied, uses then those terminal use's transparent way, transmits one or more enhancement layers to one or more selected receiving terminals.So selected receiving terminal can the automatic reception enhancement layer and is not needed to make special request.
At piece 308, receiving terminal receives basic layer and presents being used to.For example, basic layer allows to present this content with enough quality, makes can determine whether and need present this content with high-quality more at each receiving terminal.To suppose that one or more receiving terminal expectations present this content with better quality.
At piece 310, each requirement will present the receiving terminal of this content to request of server transmission, to ask one or more enhancement layers with better quality.For example, in one embodiment, send request, and request receiver logic 214 receives request via transceiver logic 210 by data network.
At piece 312, receive request at server, and fetch requested enhancement layer from content layer.For example, logic 214 request of receiving and fetch requested enhancement layer from content layer database 208.
At piece 314, send requested enhancement layer to the requesting terminal.For example, logic 214 control transceivers 210 send requested enhancement layer to the requesting terminal.
Because only send enhancement layer, so the operation of method 300 makes it possible to utilize efficiently network and receiving terminal resource to the requesting terminal.It should be noted that method 300 has only illustrated an embodiment, and within the scope of various embodiment, can make change, add or rearrange described method step.
Example
Provide an example with the lower part, how the description transmission system is used for transmitting one or more content layers to a large amount of receiving terminals.The operation of this content transmission system is compared with conventional transmission system, to illustrate how this content transmission system provides the network efficiency of raising and how to be more client device serves.In the example below, 1k=1024, and 1M=1024*1024.
In case one content of multimedia becomes available for Distributor for the first time, the time cycle that continues the whole group of clean culture of dispatching at this content is such interval, promptly during this period, the multi-user communication channel/network of Gong Xianging is just experiencing its peak load.For the stand-by period with possible minimum is transmitted this content to all targeted customers,, come it is utilized with the peak capacity of communication channel/network in this " propelling movement " stage.
Suppose that in conventional system one section acoustic image content clip of displaying duration that has 5 minutes is at (t constantly
0) become available.Add video (24kbps) bandwidth with the audio frequency (8kbps) that amounts to 32kbps this montage is encoded, so the length of this montage is 9600kb.This montage has 30 minutes life cycle (for example, news), and therefore, it will be at the moment (t
0+ 30 minutes) (that is, out-of-date) expires.Also hypothesis can be tolerated to exceed t
0(that is) time delay, 10 minutes is to think in time to have transmitted the content of this time-sensitive afterwards at most 1/3 of these life cycles.If transmission channel has the bandwidth of 1Mbps, the simple computation below shows so, under the restriction of " being no more than 10 minutes time delay " given above, in conventional system, can serve for 64 client computer (receiving terminal).
(10min.×1Mbps)/9600kb＝600Mb/9600kb＝(600×1024)kb/9600kb＝64
More than, from the moment (t
0) beginning, in 10 minutes, utilize the peak capacity of communication channel/network to transmit this content to 64 client computer.Under the situation of not relaxing (being associated with the content of multimedia of time-sensitive) maximum latency tolerance restriction, improving transmission channel bandwidth (it is main system resource) is the mode of the serviced Number of Clients of a kind of tangible increase.
Yet, in one or more embodiment, described content transmission system is used under identical maximum latency tolerance restriction, and under the spare system resource situation of (comprising transmission channel bandwidth), the solution of the serviced Number of Clients of a kind of increase of uniqueness is provided, and wherein these additional resources often are they self additional restrictions.
In case one content is sent to client devices, it just can be by consumption (that is, viewed or present).The user content consumption mode is such, neither all user/client computer all content can with after immediately it is watched, neither all contents that are transmitted all intactly be watched before it expires, the content that some of them are transmitted is never viewed mistake before it expires.In these two observed situations first mean, continue for (approximately) content life cycle this content consumption time at interval, exist a diversity.Second observed situation mean, under typical condition, owing to be transmitted but never viewed contents fragment (part or Strip content) has been wasted some transmission bandwidths (very Bao Gui system resource).So in one or more embodiment, described content transmission system is used to reach following two purposes:
1. by adopting at the content consumption that is transmitted/watch " time diversity " in period, and allow under the situation of transfer delay restriction not relaxing maximum, can be smoothly (promptly, be dispersed throughout on the time) the transmission budget requirement of " each client computer of each content (per client per-content) ", so that the transmission channel (distributing network) by fixed-bandwidth provides service to the client computer of big figure more.
2. the percentage of the transmission bandwidth that is wasted by reduction can improve total system effectiveness.
Content transmission system reaches this two purposes by carrying out following aspect.
Be subjected to (on Distributor) content can with the moment and the maximum of regulation allow that the initial time of transfer delay constraint is in the cycle, to be lower than the best in quality level but still realize the quality-class of acceptable displaying quality, transmit whole contents to All Clients.So according to " the consumption time diversity " of content, residue life cycle of utilizing content is to client computer delivery quality patch (quality patch) (that is enhancement layer).By this way, the transmission budget requirement that transmits corresponding each each user of content with the content of best in quality is extended to the long time cycle and (approaches the whole life cycle of this content, rather than allow the sub-fraction of the life cycle that transfer delay is determined by maximum, for example, in the above example 1/3rd of content life cycle).As a result, make content transmit and become level and smooth, and therefore make when the content of gross level is pushed to All Clients that Distributor can provide service to the client computer of bigger quantity in peak load interim.
2. the public expression with the content of certainty ground (that is, inevitable/must) distribution is reduced to the MDS minimum data set that can realize acceptable displaying quality.With the distribution of follow-up quality patch (enhancement layer) keep in fact watch this content or more likely the time of certain before content expires is watched the client computer of this content.So, because for the client computer of not watching this content, waste will only be that the minimum that " certainty " of this content is transmitted is represented, the therefore percentage of the transmission budget (bandwidth) that minimizing is wasted.
Described content transmission system uses the gradable expression of content to achieve the above object.In one embodiment, described content transmission system reaches these purposes by carrying out following one or more step.
1. with the content in the scalability formats maintenance content Distributor.
2. in the clean culture/multicast time frame of scheduling, content-based scalability formats sends the content (basic layer) of using basic/preliminary form performance to all terminals.
3. when specific user's (terminal) wishes to watch the expansion of this content or full content, this terminal provides the improvement of this content by backward channel (up link) notice Distributor, described improvement is subjected to the influence of the state (that is its available resources) of Distributor.
The whole basic layer of the gradable expression of content, and initial (about the time) part of the enhancement layer that also may have provide the basic/preliminary form with the inevitable content that sends to all users.This citation form provides following function.
1. it has satisfied the requirement that transmits the content of agreement to the user.
2. it allows this content is tentatively watched, so that carry out possible decision-making, this decision-making is about whether watching this content in the time cycle that prolongs.
Just in case afterwards Distributor can not provide (remaining) enhancement layer as improvement to the specific user, this citation form also provides basic (gratifying/acceptable) quality-class of watching this content.
For example, between the basic layer of MPEG-4 scalable video and enhancement layer, take typical 1: 1 bandwidth ratio, by utilizing an embodiment of this content transmission system, can be as follows for the approximate upper bound that the performance of expectation increases.
Suppose that content clip is in this example encoded with 32kbps once more, but be specifically with gradable (Voice ﹠ Video) form.Following is each bandwidth of content layer.
Video _ basic: 12kbps;
Video _ enhancing: 12kbps;
Audio frequency _ basic: 4kbps;
Audio frequency _ enhancing: 4kbps.
In the operating process according to the system of described embodiment, Distributor only uses the public preliminary expression that adds up to bandwidth to transmit contents as all terminals of basic course of 16kbps.For example, send " each client computer " transmission budget that produced 4800kb in 5 minutes with 16kbps.In addition, Distributor have one can be utilized 10 minutes, bandwidth is the transmission channel of 1Mbps.As follows, one with carry out above very similarly calculate the number of having described the terminal of being supported.
(10min.×1Mbps)/4800kb＝600Mb/4800kb＝(600×1024)kb/4800kb＝128
This illustrates, and compares with conventional system, and an embodiment of this content transmission system can serve for the client computer of twice number in peak load interim of transmitting network.
Secondly, the transmission budget (TB) that is wasted at both of these case or the percentage of bandwidth are calculated.Suppose that for the content type of being considered (and delivery time and some possible other factors), 10% (not being subjected to a mark of actual user's number domination) that counts user's population never watched this content in the life cycle of content.Owing to the viewed TB that is wasted of partial content only can easily be combined in this percentage numeral, and can be as give a definition " percentage of the TB that is wasted ".
TB%=(TB that utilizes for never viewed content) * 100/ (total TB that is utilized) is wasted
Use can not first kind of situation of classification (individual layer) coding under, " TB that utilizes for never viewed content " can be by following derivation.
Not (TB that utilizes for never viewed content)=(each user's TB) * (not watching the number of users of its content)
Supposing, (BW) is total transmission bandwidth [kbps] that Distributor can be used, and (Δ T) is initial time cycle [second], and in the meantime, All Clients should be transmitted the complete representation of content, and (n) is the number of client computer.TB that so can following each user of expression.
Total TB/ number of users=BW* Δ T/n that each user's TB=is utilized
Do not watch the number of users of its content to equal (0.10*n).So, can be as the expression of getting off " TB that utilizes for never viewed content ".
TB=(BW* Δ T/n) the * 0.10*n=0.10*BW* Δ T that utilizes for never viewed content
At last, under the condition of above hypothesis, at the situation of first kind (can not classification contents), can be as the expression of getting off " percentage of the TB that is wasted ".
TB%=(0.10*BW* Δ T) * 100/ (BW* Δ T)=10% is wasted
With reference now to the embodiment of the content transmission system that uses gradable content encoding (basic layer adds an enhancement layer, and the bandwidth ratio is 1: 1) according to described embodiment,, can be as the expression of getting off " TB that utilizes for never viewed content ".
The TB=(TB of each user initial " certainty ") * (not watching the number of users of its content) that utilizes for never viewed content
Suppose, (BW) be total transmission bandwidth [kbps] that Distributor can be used, (Δ T) represents the initial time cycle [second], during this period, All Clients should be transmitted the preliminary expression of content, and (2n) is the number of client computer, and this is because under the assumed condition of present example, morning, shown client computer was compared with, and this content transmission system can provide service for the client computer that reaches twice.So the TB of each user initial " certainty " can followingly represent.
Total initial transmission budget/number of users=BW* Δ T/2n that the TB=of each user initial " certainty " is utilized
Do not watch the number of users of its content can be represented as (0.10*2n).So, " TB that utilizes for never viewed content " can be as the expression of getting off.
" TB that utilizes for never viewed content "=(BW* Δ T/2n) * 0.10*2n=0.10*BW* Δ T
It should be noted that as absolute magnitude [bit number that is sent out] TB that is wasted does not change in two systems.Yet, use a embodiment as content transmission system described herein, as described below, the total TB that is utilized (and serviced client computer number) is bigger than what utilized in the conventional system.
Total TB (at the quality patch) of total TB that the total TB=that is utilized initially is utilized (at preliminary content representation)+be utilized subsequently
Suppose that the bandwidth ratio between basic layer and enhancement layer is 1: 1, " the total TB that is utilized " will transmit complete enhancement data corresponding to the user who watches its content to all subsequently.This produces following result.
0.90*2n*(BW*ΔT/2n)＝0.90*BW*ΔT
At last, with above all gather, can followingly represent at the embodiment of gradable transmission system " percentage of the TB that is wasted ".
The TB%=that is wasted (0.10*BW* Δ T) * 100/ (BW* Δ T+0.90*BW* Δ T)=10/1.9 ≈ 5.26%
Therefore, based on described illustrative hypothesis, the embodiment of described content transmission system reaches following two core advantages than conventional system.
1. during peak load, can serve the original user number of twice.
2. the percentage of TB of being wasted has reduced only about half of.
For client devices (terminal), the foregoing description has extremely important and direct influence to the utilization of storage resources.Because in the moment of the clean culture/multicast of its initial schedule, the content that receives is in lower bandwidth, so this will reduce the needed memory space of its local cache (up to its consumption) pro rata.This means that same receiving terminal can receive and hold more substantial content item, to be used for user's decision-making of whether watching and consumption.So, based on 1: 1 bandwidth ratio between basic layer and the enhancement layer, when using embodiment of content transmission system as described herein, the approximate upper limit of the growth of the available storage at receiving terminal place is the nearly twice of the content clip that can store at receiving terminal.
In modern digital communication, transmission/reception, storage and calculating (promptly handling) are three principal elements of power consumption.For this fact, various embodiment as described herein have direct, positive influence to the communication of power-efficient.Following summary like that, for example under the situation of battery powered (reception) terminal as the portable phone, these embodiment will cause the battery life that obtains to prolong.In the reception stage, (that is, only basic layer) adequacy means the initial data of the reception decrement that realizes by specific embodiment, for receiving terminal has reduced taking (promptly Traffic Channel, reduced the airtime), therefore and reduced the power consumption of its transceiver logic.For storage, the memory architecture of advanced power-efficient, such as many power consumption states memory bank, Partial Array Self Refresh and available degree of depth power-down mode, to be converted to energy-conservation in a large number in the storage subsystem of receiving terminal as the reduction of the necessary data storage amount that can realize by one particular embodiment of the present invention (that is, only at the memory data output of basic layer).At last, the data volume that reduction must be processed reaches the activity that therefore reduces processor, in conjunction with the processor architecture of power-efficient, makes and realizes further energy-conservation at receiving terminal.
Fig. 4 is illustrated in the functional block diagram of the receiving terminal 400 that uses among the embodiment of content transmission system.For example, in one embodiment, terminal 400 is wireless devices, for example radio telephone.Terminal 400 comprises processing logic 402, device resource and interface 404, content layer memory 410 and transceiver logic 406, and all these unit all are coupled on the internal data bus 408.Terminal 400 also comprises decode logic 414 and request transmitter logic 412, and they also are coupled on the data/address bus 408.
In one or more embodiment, processing logic 402 comprises the combination in any of CPU, processor, gate array, hardware logic, memory element, virtual machine, software and/or software and hardware.Therefore, processing logic 402 generally includes the logic that is used to carry out machine readable instructions.
Device resource and interface 404 comprise hardware and/or the software that allows terminal 400 and inside and outside system to communicate.For example, built-in system can comprise mass-storage system, memory, display driver, modulator-demodulator or other internal device resources.External system can comprise user interface facilities, printer, disc driver or other local device or system.Device resource and interface 404 allow terminal 400 to present the content that is stored in the content layer memory 410.
When Distributor responded by sending requested enhancement layer, processing logic 402 was used for controlling transceiver logic 406 layer that receives is stored in memory 410.In case receive requested enhancement layer, decode logic 414 can be to its decoded content of decoding and can present with the quality that strengthens on terminal 400 to produce.It should be noted that terminal 400 only is an embodiment, and under the situation of the scope that does not deviate from described embodiment, can make interpolation, change, deletion or modification described functional unit.
Fig. 5 is illustrated in an embodiment of the method 500 that is used to operate receiving terminal among the embodiment of content transmission system.
At piece 502, receive the basic layer of expression content at equipment.For example, in one embodiment, for example server 102 such content servers send basic layer and are somebody's turn to do basic layer to equipment and received by transceiver logic 406.In one embodiment, basic layer can comprise, can be combined with or can be with in the one or more enhancement layers part or all.
At piece 504, equipment has basic layer and can present this content.For example, in one embodiment, basic layer is stored in the memory 410, and by using decode logic 414 at first basic layer to be decoded to produce decoded content, to present this decoded content by device resource and interface 404 then, presents this basic layer on equipment.If the content quality that presents with basic layer is acceptable,, then do not need further action and this method to proceed to piece 512 if perhaps the equipment user selects not watch this content.If the equipment user wishes to come view content with the quality that improves, this method proceeds to piece 506 so.
At piece 506, device-to-server sends request to obtain one or more enhancement layers.Requested enhancement layer will allow to watch this content with the quality that strengthens.For example, request transmitter logic 412 sends a request via transceiver logic 406 to Distributor, to ask one or more enhancement layers.
At piece 508, equipment receives the enhancement layer of being asked.For example, in response to the request for enhancement layer, server 102 is fetched enhancement layer and they is sent to this equipment from database.Enhancement layer is stored in the memory 410, and uses so that present this content on this equipment together with the basic layer that receives previously.In one embodiment, in this equipment, do not store enhancement layer, and the result may obtain more service and other significant advantage.Receiving terminal (that is, processing logic 402) is made at the decision that described enhancement layer is not still stored in the receiving terminal storage.In another embodiment, make the decision that storage is not still stored by send server.In arbitrary situation, can make decision based on multiple factor, these factors comprise but are not limited to subscription level and/or user preference.
At piece 510, use basic layer and the enhancement layer that receives to present this content.For example, 414 pairs of basic layers of processing logic 402 control decode logics and any enhancement layer are decoded, and to produce decoded content, the content compared with only presenting with basic layer can present this decoded content with higher quality on equipment.So this system provides a kind of mechanism that allows receiving terminal to determine the quality-class that content presents.
In another embodiment, based on selected standard, receiving equipment receives the content layer of correct number, and need not to make special request.For example, in one embodiment, based on using (for example, content consumption, pattern/statistics/data collection, predetermined contract, facility registration) the preceding or, sending enhancement layer to terminal based on any other standard.In this embodiment, Distributor sends the content layer of correct number from trend equipment.So this system also provides a kind of like this mode for equipment, that is, receive their desired extra fine quality levels and need not to make special request.
Owing to only receive the terminal transmission enhancement layer of enhancement layer, so the operation of method 500 makes it possible to efficiently utilize network and receiving terminal resource to expectation.So, efficiently utilized the transmission link of equipment and preserved storage resources, disposal ability and the electric energy of equipment.It should be noted that method 500 has only illustrated an embodiment, and within the scope of various embodiment, can make change, add or rearrange described method step.
Therefore,, should be appreciated that, under the situation of spirit that does not deviate from them or inner characteristic, can make various changes these embodiment although have illustrated and described the one or more embodiment of content transmission system here.Therefore, disclosure herein and explanation are intended to illustrate rather than be limited in the scope of the present invention that proposes in the claims.
Claims (40)
1, a kind of being used for sends the method for contents from Distributor to one or more receiving terminals at data network, and described method comprises:
Is described content encoding a basic layer and one or more enhancement layer;
Send described basic layer to described one or more receiving terminals;
Receive the request that requires to receive one or more enhancement layers from least one receiving terminal; And
Send described one or more enhancement layer to described at least one receiving terminal.
2, method according to claim 1, wherein, the step of described coding comprises that using the graduated encoding technology is described basic layer and described one or more enhancement layer to described content encoding.
3, method according to claim 1, wherein, the step of the described basic layer of described transmission comprises to described one or more receiving terminals and sends arbitrary portion in described basic layer and the described one or more enhancement layer.
4, method according to claim 1, wherein, the step of the described basic layer of described transmission also comprises based on selected standard, send arbitrary portion in described basic layer and the described one or more enhancement layer to the receiving terminal of choosing, wherein, described transmission is transparent to the user of the described receiving terminal of choosing.
5, method according to claim 4, wherein, the described basic layer of described transmission comprises the described part that sends in described basic layer and the described one or more enhancement layer, described selected standard comprises the arbitrary standards combination based on described selected standard, wherein, described selected standard is to choose from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration.
6, method according to claim 1 also comprises:
Receive respectively a plurality of requests from a plurality of receiving terminals, wherein, each request is used for asking sending part separately in the described one or more enhancement layer to the terminal that is associated with this request; And
In described a plurality of receiving terminals each sends described part separately, and how one or more enhancement layers are to satisfy described a plurality of request, the request that is associated with this terminal.
7, method according to claim 1, wherein, the described basic layer of described transmission comprises by radio data network and sends described basic layer that wherein, described terminal is a wireless device.
8, be used for sending the device of contents from Distributor to one or more receiving terminals at data network, described device comprises:
Be used for described content encoding is the processing logic of a basic layer and one or more enhancement layers;
Be used for sending the transmission logic of described basic layer to described one or more receiving terminals;
Be used for receiving the receive logic of the request that requires the one or more enhancement layers of reception from least one receiving terminal; And
Be used for sending the logic of described one or more enhancement layers to described at least one receiving terminal.
9, device according to claim 8, wherein, it is described content encoding a basic layer and one or more enhancement layer that described processing logic is used to use the graduated encoding technology.
10, device according to claim 8, wherein, described transmission logic is used for sending to described one or more receiving terminals the arbitrary portion of described basic layer and one or more enhancement layers.
11, device according to claim 8, wherein, described transmission logic is used for based on selected standard, sends arbitrary portion in described basic layer and the one or more enhancement layer to the receiving terminal of choosing, wherein, described transmission is transparent to the user of the described receiving terminal of choosing.
12, device according to claim 11, wherein, described selected standard comprises the arbitrary standards combination, be from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration, to choose, Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration.
13, device according to claim 8 also comprises:
Be used to receive the logic of a plurality of requests, wherein, each request is used for asking the part separately in the described one or more enhancement layer; And
Be used for sending the described part separately of described one or more enhancement layers to satisfy the logic of described a plurality of requests, be used for receiving from a plurality of receiving terminals respectively the logic of a plurality of requests, wherein, each request is used for asking to send described one or more enhancement layer to the terminal that is associated with this request; And
Each that is used for to described a plurality of receiving terminals sends more or more enhancement layers, to satisfy the logic of the described request that is associated with this terminal.
14, device according to claim 8, wherein, described data network is a radio data network, described terminal is a wireless device.
15, be used for sending the device of contents from Distributor to one or more receiving terminals at data network, described device comprises:
Be used for described content encoding is the module of a basic layer and one or more enhancement layers;
Be used for sending the module of described basic layer to described one or more receiving terminals;
Be used for receiving the module of the request that requires the one or more enhancement layers of reception from least one receiving terminal; And
Be used for sending the module of described one or more enhancement layers to described at least one receiving terminal.
16, device according to claim 15, wherein, the described module that is used to encode comprises that being used to use the graduated encoding technology is the module of described basic layer and described one or more enhancement layers to described content encoding.
17, device according to claim 15, wherein, the described module that is used for sending described basic layer comprises the module that is used for sending to described one or more receiving terminals the arbitrary portion of described basic layer and described one or more enhancement layers.
18, device according to claim 15, wherein, the described module that is used to send described basic layer also comprises the standard that is used for based on selected, send the module of the arbitrary portion in described basic layer and the one or more enhancement layer to the receiving terminal of choosing, wherein, described transmission is transparent to the user of the described receiving terminal of choosing.
19, device according to claim 18, wherein, described selected standard is to choose from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration, comprises the combination in any based on the standard of Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration.
20, device according to claim 15 also comprises:
Be used to receive the module of a plurality of requests, wherein, each is asked respectively from a plurality of receiving terminals, and wherein, each request is used for asking sending part separately in the described one or more enhancement layer to the terminal that is associated with this request; And
Be used for sending described part separately in the described one or more enhancement layer, to satisfy the module of the described request that is associated with this terminal, to satisfy described a plurality of request, more or more enhancement layers to each of described a plurality of receiving terminals.
21, device according to claim 15, wherein, described data network is wireless, terminal is a wireless device, data network.
22, a kind of computer-readable medium that comprises instruction when described instruction is distributed processing logic in the server and carries out, is used for sending contents to the one or more receiving terminals of data network, and described computer-readable medium comprises:
Be used for described content encoding is the instruction of a basic layer and one or more enhancement layers;
Be used for sending the instruction of described basic layer to described one or more receiving terminals;
Be used for receiving the instruction that requires to receive the request that sends one or more enhancement layers from least one receiving terminal; And
Be used for sending the instruction of described one or more enhancement layers to described at least one receiving terminal.
23, computer-readable medium according to claim 22, wherein, the described instruction that is used to encode comprises that being used to use the graduated encoding technology is the instruction of described basic layer and described one or more enhancement layers to described content encoding.
24, computer-readable medium according to claim 22, wherein, the described instruction that is used for sending described basic layer comprises the instruction that is used for sending to described one or more receiving terminals the arbitrary portion of described basic layer and one or more enhancement layers.
25, computer-readable medium according to claim 22, wherein, the described instruction that is used to send described basic layer also comprises the standard that is used for based on selected, send the instruction of the arbitrary portion in described basic layer and the one or more enhancement layer to the receiving terminal of choosing, wherein, described transmission is transparent to the user of the described receiving terminal of choosing.
26, computer-readable medium according to claim 25, wherein, the described selected described selected standard of standard is to choose from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration, comprises the combination in any based on the standard of Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration.
27, computer-readable medium according to claim 22 also comprises:
Be used to receive the instruction of a plurality of requests, wherein, each request is respectively from a plurality of receiving terminal requests part separately, and wherein, each request is used for asking to send described one or more enhancement layer to the terminal that is associated with this request; And
Be used to and satisfy described a plurality of request, each in described a plurality of receiving terminals sends described part separately in the described one or more enhancement layer to satisfy the instruction of the described request be associated with this terminal.
28, computer-readable medium according to claim 22, wherein, described data network is a radio data network, terminal is a wireless device.
29, a kind of being used for receives from the method for the content of Distributor transmission at data network operation receiving terminal, and described method comprises:
The basic layer of received content;
Need to determine one or more enhancement layers to present described content with the quality that strengthens;
Send the request that requires described one or more enhancement layers to described Distributor;
Receive described one or more enhancement layer; And
Use described basic layer and described one or more enhancement layer to present described content, with the quality of the enhancing that obtains to expect.
30, method according to claim 29, wherein, the described step that presents comprises:
Described basic layer and described one or more enhancement layer are decoded to produce decoded content, wherein, described decoding and the graduated encoding technology contrary that is used for described basic layer and described one or more enhancement layer are encoded; And
Present the quality of described decoded content with the enhancing of acquisition expectation.
31, method according to claim 29, wherein, the step of the basic layer of the described content of described reception comprises the arbitrary portion that receives in basic layer of described content and the one or more enhancement layer.
32, method according to claim 29, wherein, the step of the described basic layer of described reception also comprises described basic layer that reception has been sent out based on selected standard and the arbitrary portion in the one or more enhancement layer, wherein, be transparent to the reception of the arbitrary portion in the described one or more enhancement layers to the user of described receiving terminal.
33, method according to claim 32, wherein, described selected standard is to choose from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration, and described selected standard comprises the combination in any based on the standard of Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and receiving terminal registration.
34, method according to claim 29, wherein, described receiving terminal is a wireless device.
35, a kind of being used for receives from the receiving terminal of the content of Distributor transmission at data network, and described terminal comprises:
The module that is used for the basic layer of received content;
Be used for determining that the one or more enhancement layers of needs are to present the module of described content with the quality that strengthens;
Be used for sending the module of the request that requires described one or more enhancement layers to described Distributor;
Be used to receive the module of described one or more enhancement layers; And
Be used to use described basic layer and described one or more enhancement layer to present described content, with the module of the quality of the enhancing that obtains to expect.
36, terminal according to claim 35, wherein, the described module that is used to present comprises:
Be used for described basic layer and described one or more enhancement layer are decoded to produce the module of decoded content, wherein, described decoding and the graduated encoding technology contrary that is used for described basic layer and described one or more enhancement layer are encoded; And
Be used to present the module of described decoded content with the quality of the enhancing of acquisition expectation.
37, terminal according to claim 35, wherein, the described module that is used for receiving the basic layer of described content comprises the module of the arbitrary portion that is used to receive basic layer of described content and one or more enhancement layers.
38, terminal according to claim 35, wherein, the described module that is used for receiving described basic layer also comprises the module of the arbitrary portion that is used to receive the described basic layer that is sent out based on selected standard and one or more enhancement layers, wherein, be transparent to the reception of the arbitrary portion in the described one or more enhancement layers to the user of described receiving terminal.
39, according to the described terminal of claim 38, wherein, described selected standard is to choose from the one group of standard that comprises Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and endpoint registration, and described selected standard comprises the combination in any based on the standard of Resource Availability, content use the preceding, consumption mode, statistics, predetermined contract and receiving terminal registration.
40, terminal according to claim 35, wherein, described terminal is a wireless device.
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| CN109819272B (en) * | 2018-12-26 | 2022-09-16 | 平安科技（深圳）有限公司 | Video sending method, video sending device, computer readable storage medium and electronic equipment |
| CN114070777A (en) * | 2020-07-29 | 2022-02-18 | 中国电信股份有限公司 | Multicast tree construction method, multicast data transmission method, controller and storage medium |
| CN112383816A (en) * | 2020-11-03 | 2021-02-19 | 广州长嘉电子有限公司 | ATSC system signal analysis method and system based on android system intervention |
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