CN102595203A - Method and equipment for transmitting and receiving multi-media data - Google Patents
Method and equipment for transmitting and receiving multi-media data Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8451—Structuring of content, e.g. decomposing content into time segments using Advanced Video Coding [AVC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
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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
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234327—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into layers, e.g. base layer and one or more enhancement layers
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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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440227—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by decomposing into layers, e.g. base layer and one or more enhancement layers
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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
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
- H04N21/4621—Controlling the complexity of the content stream or additional data, e.g. lowering the resolution or bit-rate of the video stream for a mobile client with a small screen
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Abstract
The invention provides a method and equipment for transmitting and receiving multi-media data, which relate to the multi-media field. The method for transmitting the multi-media data comprises the following steps that: a media forwarding server generates a corresponding relation between descriptive information of each showing code stream contained in an SVC (Switching Virtual Circuit) code stream and a DTQ (Data Transmission Quality) identification according to SEI (Supplemental Enhancement Information) in the SVC code stream needed to be sent; and the media forwarding server sends the generated corresponding relation between the descriptive information of each showing code stream contained in the SVC code stream and the DTQ identification while sending the SVC code stream to a multi-media client end or before sending the SVC code stream. According to the method, after a receiving end receives the multi-media data, the processing of the multi-media data is simplified.
Description
Technical field
The present invention relates to transmission, method of reseptance and transmission thereof, the receiving equipment in multimedia field, particularly a kind of multi-medium data.
Background technology
Along with the development of coding techniques, in Streaming Media typical application system, the video format of support is more and more.Wherein the code stream of H264/AVC (Advanced Video Coding) form is used comparatively extensive.And on the basis of H264/AVC code stream, developed SVC (but Scalable Video Coding layered video coding).The SVC code stream has the spatial domain layering, time domain layering and quality layering.Because the hierarchical nature of code stream, SVC has brought brand-new user experience to the user.Yet Streaming Media host-host protocol standard commonly used at present almost is transparent for the transmission content, and it provides the passage of Streaming Media transmission.
With Streaming Media host-host protocol RTP (Real-time Transport protocol, RTP) is example, and its packet package structure comprises two parts, protocol header and loading section.Protocol header has comprised the load medium type, bag sequence number, timestamp, Synchronization Source etc.And the normally simple consecutive order storage of multi-medium data of loading section.Another kind of Streaming Media host-host protocol commonly used such as MPEG (Moving PicturesExperts Group, Motion Picture Experts Group) TS (Transport Stream, MPTS) divide into groups, and its packet package structure is like this equally.
For SVC and MVC code stream; During for the subclass in transmission code stream, extracted wherein, the client can't obtain any supplementary from packet header, in present standard criterion; Present MPEG-2TS carries the SVC code stream and only confirmed the corresponding spatial domain classification of a substreams, and is as shown in Figure 1.For quality in the classification of same spatial domain and not further segmentation of time domain classification; Cause to find the corresponding code stream of certain spatial domain classification easily through PID (program identification); But, in this spatial domain classification, want to find the code stream of certain quality grading or time domain classification just relatively more difficult; Can only be through the traversal load, comparison NALU (network abstraction layer unit) head just can obtain.
During as storage file, this problem is arranged also at MPEG2-TS.When client is switched the attribute of watching code stream continually, for example switch the size (spatial scalability) of watching code stream, frame per second (time domain classification) continually.MPEG2-TS is during as storage file, can not be efficiently the code stream of needs be extracted from file.And when the user extracts the code stream of transmission, must be resolved to the DTQ (space time quality) of the code stream correspondence that SEI (Supplementalenhancement information, additional increase information) could confirm to extract.And SEI not necessarily exists in transmission code stream.
Summary of the invention
The present invention provides a kind of transmission, method of reseptance and transmission thereof, receiving equipment of multi-medium data.
One of the object of the invention is to provide the information and the corresponding identification thereof that respectively represent code stream in the multimedia coding stream to receive distolateral processing to multi-medium data so that simplify.
For this reason, the invention discloses a kind of transmission method of multi-medium data, comprising:
But the medium forwarding server according to the additional increase information (SEI) in layered video coding (SVC) code stream that will send generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of space time quality (DTQ) sign;
Said medium forwarding server perhaps sends said SVC code stream when sending said SVC code stream to the multimedia client before, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
Preferably, said method also comprises:
After said multimedia client receives said SVC code stream; From the corresponding relation of the said descriptor that respectively represents code stream received and DTQ sign; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, travel through said SVC code stream and carry out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
Preferably, said method also comprises:
Said medium forwarding server will be before the multimedia client be sent said SVC code stream; The source code flow of said SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches,, respectively represent the corresponding respectively DTQ sign of code stream to be divided into the different code streams that represents.Preferably; Said multimedia client receives the said corresponding relation that respectively represents the descriptor and the DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from received SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
Another object of the present invention is to realize the ordered layered of multimedia code stream.
For this reason, the invention discloses a kind of transmission method of multi-medium data, comprising:
Said medium forwarding server is divided into one or more spatial scalability code stream sections with the source code flow of the SVC code stream of receiving according to spatial scalability; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches; To be divided into the different code streams that represents, respectively represent the corresponding respectively DTQ sign of code stream;
Said medium forwarding server sends the SVC code stream through three classifications as required.
Preferably; In the said method; Said multimedia client receives said SVC code stream; Generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of DTQ sign according to the SEI in this SVC code stream, confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from said SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
Preferably, said method also comprises:
Said medium forwarding server is before sending said SVC code stream; Corresponding relation according to descriptor that respectively represents code stream that is comprised in this SVC code stream of the generation of the SEI in the said SVC code stream and DTQ sign; When sending said SVC code stream or before sending said SVC code stream, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and space time quality DTQ sign.Preferably; Said multimedia client receives the said corresponding relation that respectively represents the descriptor and the DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from received SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
The present invention also has a purpose to be, when the multimedia client received the information that respectively represents code stream in the multimedia coding stream and corresponding identification thereof, reduced data was handled operation.
For this reason, the invention discloses a kind of method of reseptance of multi-medium data, comprising:
When the multimedia client receives the SVC code stream; From paid-in this SVC code stream, respectively represent in the corresponding relation of descriptor and DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, travel through said SVC code stream and carry out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
Another purpose of the present invention is to improve the efficient that the multimedia client is extracted multimedia code stream.
For this reason, the invention discloses a kind of method of reseptance of multi-medium data, comprising:
When the multimedia client receives the SVC code stream; From this SVC code stream, respectively represent in the corresponding relation of descriptor and DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from said SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
Preferably, in the said method, said multimedia client respectively represents from this SVC code stream in the corresponding relation of descriptor and DTQ sign of code stream, confirms that the process of the DTQ sign that the descriptor that represents code stream that the support of this client plays is corresponding is following:
Said multimedia client confirms therefrom that according to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the received SVC code stream and the corresponding relation of DTQ sign the corresponding DTQ of the descriptor that represents code stream that the support of this client is play identifies.
Perhaps; Said multimedia client receives the corresponding relation that respectively represents the descriptor and the DTQ sign of code stream in this SVC code stream that said multimedia forwarding server sends, and therefrom confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play.
The present invention also has a purpose, and proposition can provide the transmission equipment that respectively represents the information and the corresponding identification thereof of code stream in the multimedia coding stream.
For this reason, the invention discloses a kind of transmission equipment of multi-medium data, comprising:
First module, according to the SEI in the SVC code stream that will send generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of DTQ sign;
Second module, when sending said SVC code stream or before sending said SVC code stream to the multimedia client, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
Preferably, above-mentioned transmission equipment also comprises:
Three module; The source code flow of said SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability, respectively each spatial scalability code stream section is carried out the secondary classification, respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches according to a kind of hierarchical approaches in time domain classification and the quality grading; To be divided into the different code streams that represents; Send to the multimedia client, wherein, respectively represent the corresponding respectively DTQ sign of code stream.
The present invention also has a purpose, provide a kind of transmission equipment, can realize the ordered layered of multimedia code stream.
For this reason, the invention discloses a kind of transmission equipment of multi-medium data, comprising:
First module is divided into one or more spatial scalability code stream sections with the source code flow of SVC code stream according to spatial scalability;
Second module; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches,, send to the multimedia client to be divided into the different code streams that represents; Wherein, respectively represent the corresponding respectively DTQ sign of code stream.
Preferably, above-mentioned transmission equipment also comprises:
Three module; According to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the said SVC code stream and the corresponding relation of DTQ sign; When sending said SVC code stream or before sending said SVC code stream to the multimedia client, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
The present invention also has a purpose to be, a kind of receiving equipment of multi-medium data is provided, but reduced data is handled operation.
For this reason, the invention discloses a kind of receiving equipment of multi-medium data, comprising:
First module receives the SVC code stream, from paid-in this SVC code stream, respectively represents in the corresponding relation of descriptor and DTQ sign of code stream, confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Second module travels through said SVC code stream and carries out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
Another purpose of the present invention is that a kind of receiving equipment that extracts the high multi-medium data of multimedia code stream efficient is provided.
For this reason, the invention discloses a kind of receiving equipment of multi-medium data, comprising:
First module receives the SVC code stream, from this SVC code stream, respectively represents in the corresponding relation of descriptor and DTQ sign of code stream, confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Second module is selected the corresponding code stream that represents of determined DTQ sign and is carried out decoding and displaying from said SVC code stream.
Preferably; In the said equipment; Said first module; According to the corresponding relation of descriptor that respectively represents code stream that is comprised in this SVC code stream of the generation of the SEI in the received SVC code stream and DTQ sign, confirm that therefrom the corresponding DTQ of the descriptor that represents code stream that the support of this client is play identifies.
Preferably; In the said equipment; Said first module receives the corresponding relation that respectively represents the descriptor and the DTQ sign of code stream in this SVC code stream that said multimedia forwarding server sends, and therefrom confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play.
One embodiment of the present of invention clocklike deposit it to existing SVC code stream rearrangement, and a kind of multimedia code stream of ordered layered promptly is provided.Thereby make server or client this code stream being extracted, can finding required code stream easily during operation such as switching, improved the response speed of server or client.Information that the present invention also has an embodiment to provide respectively to represent code stream in the SVC code stream and corresponding DTQ sign thereof receive distolateral processing to multi-medium data thereby simplify.
Description of drawings
Fig. 1 carries the structural representation of SVC for prior art MPEG2-TS;
Fig. 2 is the flow chart of transmitting multimedia data in the embodiment of the invention 3;
Fig. 3 is the structural representation that MPEG2-TS carries SVC in the embodiment of the invention 3;
Fig. 4 is a SVC code stream multicast networking sketch map in the embodiment of the invention 4;
Fig. 5 is that MPEG2-TS carries SVC code stream stream division sketch map in the embodiment of the invention 4;
Fig. 6 is the flow chart that client is extracted son stream in the embodiment of the invention 4.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is explained further details.Need to prove that under the situation of not conflicting, embodiment among the application and the characteristic among the embodiment be combination in any each other.
Embodiment 1
Applicant of the present invention considers that when streaming media server sent Media Stream at present, the SVC load that Media Stream carries was all divided according to spatial domain, quality, time domain or space, time domain, quality layer by layer.Be that the classification of outermost one deck is the spatial domain classification.Quality and time domain classification then do not have sequencing.When medium forwarding server or client are resolved the SVC load, code stream is selected, thereby the realization personalization is watched according to these classifications.If the SVC load is directly according to spatial domain, quality, time domain or space, time domain, quality order of classification layer by layer in the SVC code stream that send under the medium forwarding server; When then receiving the client of this SVC; Need not to travel through whole load, directly can confirm the corresponding DTQ of code stream that will extract.
Therefore; Based on above-mentioned thought; Present embodiment provides a kind of transmission course of multi-medium data, and in this process, the medium forwarding server is divided into one or more spatial scalability code stream sections with the source code flow of existing SVC code stream according to spatial scalability; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches,, respectively represent the corresponding respectively DTQ sign of code stream to be divided into the different code streams that represents; The medium forwarding server sends the SVC code stream through three classifications as required.
Wherein, the SVC code stream that sends as required through three classifications of medium forwarding server refers to:
When the medium forwarding server adopts the multicast mode to send, will all send as load through the SVC code stream of three classifications; When the medium forwarding server adopts mode of unicast to send, then from SVC code stream, select this clean culture and send needed D (spatial domain classification) value, T (time domain classification) value, Q (quality grading) value that represents code stream through three classifications.Find the code stream of corresponding spatial domain classification and the code stream of dependence thereof according to the D value.In the code stream of its dependence of the code stream of this spatial domain classification neutralization, find code stream and the code stream of dependence thereof of the time domain classification of correspondence according to T value.In the code stream of the code stream of the time domain classification that finds and its dependence, find code stream and the code stream of dependence thereof of the quality grading of correspondence according to Q value.At last, the code stream that represents that the medium forwarding server will be selected sends.
At this moment; When the multimedia client receives above-mentioned SVC code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play in this SVC code stream earlier, and from the SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
Wherein, The multimedia client can generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of DTQ sign according to the SEI in this SVC code stream, thereby confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play.
Embodiment 2
Applicant of the present invention proposes a kind of transmission method of multi-medium data again, comprising:
The medium forwarding server is before sending the SVC code stream, according to the corresponding relation of descriptor that respectively represents code stream that is comprised in this SVC code stream of the generation of the SEI in this SVC code stream and DTQ sign;
The medium forwarding server sends the descriptor that respectively represents code stream that generated and the corresponding relation of DTQ sign when needs send above-mentioned SVC code stream or before sending this SVC code stream.
Like this; When the multimedia client can receive the above-mentioned corresponding relation that respectively represents the descriptor and the DTQ sign of code stream; With the corresponding DTQ sign of the descriptor that represents code stream of confirming that the support of this client is play, and from received SVC code stream, find the corresponding code stream that represents of determined DTQ sign to carry out decoding and displaying and get final product.
Embodiment 3
Present embodiment proposes a kind of preferred version, and it combines the technological means of the foregoing description 1 and 2, and to carry out the transmission of multi-medium data, concrete transmission course is as shown in Figure 2, comprises following process:
Particularly, the operating process of this step is following:
Multimedia forwarding server traversal SVC code stream finds SEI, resolves SEI, and what obtain that the SVC code stream can provide represents the code stream sum; Resolve SEI, generate the descriptor that each represents code stream; Resolve SEI, obtain each and represent the corresponding DTQ of code stream, promptly the multimedia forwarding server generates SVC code stream describe, in general terms information.
Present embodiment is an example with the multi-medium data of MPEG2-TS, increases SVC code stream describe, in general terms information svc_total_descriptor among the PMT therein, and it may be defined as the information of a program level, and concrete definable is following:
Table 1 is the svc_total_descriptor definition list
In the above table, the implication of each field is following:
PresentationNum: show to comprise the view number of (representing code stream) in this SVC code stream;
DID: the sign of spatial domain classification;
TID: the sign of time domain classification;
QID: the sign of quality grading;
PresentationDescription: this represents the description of code stream, and it can offer the user and read, and according to describing the code stream that selection is watched.
The SVC code stream that step 201, multimedia forwarding server generate classification layer by layer is used for storage;
Particularly, the operating process of this step is following:
Multimedia forwarding server traversal is the SVC code stream that generates down of technology at present, the extension header of visit SVC code stream NALU unit, and on the basis of the source code flow of SVC code stream, the DID corresponding according to spatial scalability is divided into one or more DID code stream sections with source code flow.Add the length and the DID of this code stream section in the front of code stream section.On the code stream of different DID, carry out the classification second time respectively, the code stream section of traversal spatial domain classification is divided into one or more TID code stream sections according to the corresponding TID of time domain classification with the code stream of spatial scalability.Add the length and the TID of this code stream section in the front of this code stream section.On the code stream section of different TID, carry out classification for the third time respectively, the code stream section of traversal time domain classification is divided into one or more QID code stream sections according to the corresponding QID of quality grading with the code stream of time domain classification.On this code stream section, add the length and the QID of this code stream section.
Certainly in other scenes; After the multimedia forwarding server is divided into one or more DID code stream sections according to the corresponding DID of spatial scalability with source code flow; Also can be earlier carry out the secondary classification, the code stream of spatial scalability is divided into one or more QID code stream sections according to the corresponding QID of quality grading; Afterwards, the code stream section of traversal quality grading, the TID corresponding according to time domain classification carries out classification for the third time, and the code stream of quality grading is divided into one or more TID code stream sections.
(this moment, the multimedia forwarding server also can be called multicast server) is according to dividing good grade large and complete SVC code stream to carry out transmit operation when step 202, multimedia forwarding server employing multicast sender formula; When the multimedia forwarding server adopts the clean culture send mode (this moment, the multimedia forwarding server also can be called unicast server), send after from the code stream that divides good level, selecting corresponding code stream section.Wherein, the multimedia forwarding server when sending the SVC code stream or before, the SVC code stream describe, in general terms information that also forwarding step 200 is generated.
In this step, carry out transmit operation according to the large and complete code stream that divides good level and refer to, the SVC code stream that step 201 is generated all sends as load, comprises newly-increased fields such as length.For example, when adopting this step to realize that MPEG2-TS carries SVC, the structure of SVC is as shown in Figure 3, and the standard of itself and present SVC is consistent.On the basis of son stream, be divided into 1 or a plurality of quality stream, on the basis of quality stream, be divided into one or more chronons stream.
From the code stream that divides good level, selecting corresponding code stream section (being the code stream that represents that DTQ identifies after the classification) back sends and further comprises:
The medium forwarding server can be determined the D that represents code stream (spatial domain classification) value, T (time domain classification) value, Q (quality grading) value that need select as required from the SVC code stream describe, in general terms information that is generated by step 200.Find the code stream of corresponding spatial domain classification and the code stream of dependence thereof according to the D value.In the code stream of its dependence of the code stream of this spatial domain classification neutralization, find code stream and the code stream of dependence thereof of the time domain classification of correspondence according to T value.In the code stream of the code stream of the time domain classification that finds and its dependence, find code stream and the code stream of dependence thereof of the quality grading of correspondence according to Q value.At last, the code stream that represents that the medium forwarding server will be selected sends.
Wherein, when the multimedia client receives the SVC code stream that the multicast mode sends, therefrom select and represent code stream accordingly and carry out decoding and displaying, process is following:
The multimedia client is determined the D that represents code stream (spatial domain classification) value, T (time domain classification) value, Q (quality grading) value that needs are selected according to the SVC code stream describe, in general terms information of receiving.Find the code stream of corresponding spatial domain classification and the code stream of dependence thereof according to the Q value.In the code stream of its dependence of the code stream of this spatial domain classification neutralization, find code stream and the code stream of dependence thereof of the time domain classification of correspondence according to T value.In the code stream of the code stream of the time domain classification that finds and its dependence, find code stream and the code stream of dependence thereof of the quality grading of correspondence according to Q value.With giving decoder decode after the code flow rearrangement preface of selecting.
In the above-mentioned flow process, the SVC code stream of the layerings at different levels that SVC code stream describe, in general terms information that step 200 generates and step 201 generate.Only need do once and get final product.For the SVC code stream of the good layerings at different levels of storage, can not need to regenerate again.
Embodiment 4
Present embodiment is with in the network shown in Figure 4, and mobile phone inserts the method for reseptance that SVC code stream multicast is an example explanation multi-medium data.As shown in Figure 4; During multimedia forwarding server multicast SVC code stream, terminal access device (also can be described as the multimedia client) can be divided three classes, and one type is the less mobile phone of screen; One type is the moderate PDA equipment of screen, and one type is bigger notebook computer of screen or television equipment.The multicast code stream that this three kind equipments reception server is sent out.Every kind of equipment extracts the code stream of supporting broadcast separately from the multicast code stream.For example, cell phone apparatus extracts the image size from code stream be QQVGA (size is 1/4 of QVGA), and frame per second is 15 frames/s, the code stream of high definition image quality.And PDA equipment extracts the image size from code stream is QVGA, and frame per second is 15 frames/s, the code stream of high definition image quality.And computer equipment extracts the image size from code stream is VGA, and frame per second is 30 frames/s, the code stream of high definition image quality.Particularly, can shown in Figure 5ly be example, it is the son stream that 201 code stream carries QQVGA that the multimedia forwarding server send to carry PID in the MPEG2-TS code stream of SVC.PID is the son stream that 202 code stream carries QVGA, and PID is the son stream that 203 code stream carries VGA.In the code stream of each spatial domain classification, be divided into quality grading and time domain classification again.At this moment, the process of mobile phone access SVC multicast is as shown in Figure 6, comprises the steps:
Step 602 judges whether finish, finish if receive if receiving the TS data, then jump to step 610, otherwise jump to step 603.
Step 603 judges whether the data that receive are the PSI data, if then jump to step 604, otherwise jump to step 605.
Step 604 is resolved the PSI data, obtains the corresponding PID of QQVGA code stream.Obtain corresponding t value 15 frames/second, obtain the corresponding q value of high definition.
Step 605 judges whether to receive the PSI data.If then jump to step 606, otherwise jump to step 607.
Step 606 judges whether the PID of the code stream that receives is the PID of the code stream of QQVGA, if, then jump to step 608, otherwise, jump to step 607.
Step 607 abandons this data.
Step 608 is resolved load, skips length field, judges that whether the Q field is smaller or equal to the corresponding q value of high definition.If judge then whether the T field equals the corresponding t value of 15 frames/s.If then select this code stream section.Otherwise, do not select this code stream section.Afterwards, skip this code stream section, adopt above-mentioned determination methods to select code stream.Till code stream finishes.
Step 609 is sent the code stream section of selecting into decoder.
Step 610 finishes.
Embodiment 5
Present embodiment provides a kind of transmission equipment of multi-medium data, and this transmission equipment is built in the medium forwarding server, perhaps other multimedia network elements.Particularly, this equipment comprises:
First module, according to the SEI in the SVC code stream that will send generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of DTQ sign;
Second module, when the multimedia client is sent the SVC code stream or before sending the SVC code stream, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
In the preferred version; This transmission equipment can also comprise three module; The source code flow of SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability, respectively each spatial scalability code stream section is carried out the secondary classification, respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches according to a kind of hierarchical approaches in time domain classification and the quality grading; Be divided into the different code streams that represents; Send to the multimedia client, wherein, respectively represent the corresponding respectively DTQ sign of code stream.
Embodiment 6
Present embodiment provides a kind of transmission equipment of multi-medium data again, and this transmission equipment also can be built in the medium forwarding server, perhaps other multimedia network elements etc.This equipment comprises:
First module, but the source code flow of layered video coding SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability;
Second module; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches, be divided into the different code streams that represents, send to the multimedia client; Wherein, respectively represent the corresponding respectively space time quality DTQ sign of code stream.
Preferably; This transmission equipment also comprises: three module; According to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the said SVC code stream and the corresponding relation of DTQ sign; When sending said SVC code stream or before sending said SVC code stream to the multimedia client, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
Embodiment 7
Present embodiment provides a kind of receiving equipment of multi-medium data, can be multimedia clients such as mobile phone, PDA equipment, computer and TV.This equipment can comprise:
First module receives the SVC code stream, from paid-in this SVC code stream, respectively represents in the corresponding relation of descriptor and DTQ sign of code stream, confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Second module, the SVC code stream that traversal is received carries out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
In the present embodiment, the received SVC code stream of first module is without the SVC code stream of crossing order of classification, and therefore, second module need travel through the code stream that represents that the SVC code stream of being received just can obtain determined DTQ sign correspondence.
Embodiment 8
Present embodiment provides a kind of receiving equipment of multi-medium data, can be multimedia clients such as mobile phone, PDA equipment, computer and TV.This equipment can comprise:
First module receives the SVC code stream, from this SVC code stream, respectively represents in the corresponding relation of descriptor and DTQ sign of code stream, confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Wherein, First module confirms therefrom that according to the corresponding relation of descriptor that respectively represents code stream that is comprised in this SVC code stream of the generation of the SEI in the received SVC code stream and DTQ sign the corresponding DTQ of the descriptor that represents code stream that the support of this client is play identifies.Perhaps, respectively represent the corresponding relation of the descriptor and the DTQ sign of code stream in this SVC code stream that reception multimedia forwarding server sends, therefrom confirm the DTQ sign of the descriptor correspondence that represents code stream that the support of this client is play.
Second module is selected the corresponding code stream that represents of determined DTQ sign and is carried out decoding and displaying from the SVC code stream.
In the present embodiment, the received SVC code stream of first module is the SVC code stream that has carried out order of classification, and therefore, second module is selected the corresponding code stream that represents of determined DTQ sign and got final product from the SVC code stream of order of classification.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (20)
1. the transmission method of a multi-medium data is characterized in that, this method comprises:
But the medium forwarding server according to the additional increase information SEI in the layered video coding SVC code stream that will send generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of space time quality DTQ sign;
Said medium forwarding server perhaps sends said SVC code stream when sending said SVC code stream to the multimedia client before, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
2. the method for claim 1 is characterized in that, this method also comprises:
After said multimedia client receives said SVC code stream; From the corresponding relation of the said descriptor that respectively represents code stream received and DTQ sign; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, travel through said SVC code stream and carry out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
3. the method for claim 1 is characterized in that, this method also comprises:
Said medium forwarding server will be before the multimedia client be sent said SVC code stream; The source code flow of said SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches,, respectively represent the corresponding respectively DTQ sign of code stream to be divided into the different code streams that represents.
4. method as claimed in claim 3 is characterized in that,
Said multimedia client receives the said corresponding relation that respectively represents the descriptor and the DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from received SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
5. the transmission method of a multi-medium data is characterized in that, this method comprises:
But the source code flow of the layered video coding SVC code stream that said medium forwarding server will be received is divided into one or more spatial scalability code stream sections according to spatial scalability; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches; To be divided into the different code streams that represents, respectively represent the corresponding respectively space time quality DTQ sign of code stream;
Said medium forwarding server sends the SVC code stream through three classifications as required.
6. method as claimed in claim 5 is characterized in that,
Said multimedia client receives said SVC code stream; According to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in this SVC code stream and the corresponding relation of DTQ sign; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from said SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
7. method as claimed in claim 5 is characterized in that, this method also comprises:
Said medium forwarding server is before sending said SVC code stream; Corresponding relation according to descriptor that respectively represents code stream that is comprised in this SVC code stream of the generation of the SEI in the said SVC code stream and DTQ sign; When sending said SVC code stream or before sending said SVC code stream, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
8. method as claimed in claim 7 is characterized in that,
Said multimedia client receives the said corresponding relation that respectively represents the descriptor and the DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from received SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
9. the method for reseptance of a multi-medium data is characterized in that, this method comprises:
When but the multimedia client receives layered video coding SVC code stream; From paid-in this SVC code stream, respectively represent in the corresponding relation of descriptor and space time quality DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, travel through said SVC code stream and carry out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
10. the method for reseptance of a multi-medium data is characterized in that, this method comprises:
When but the multimedia client receives layered video coding SVC code stream; From this SVC code stream, respectively represent in the corresponding relation of descriptor and space time quality DTQ sign of code stream; Confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play, from said SVC code stream, select the corresponding code stream that represents of determined DTQ sign and carry out decoding and displaying.
11. method as claimed in claim 10 is characterized in that,
Said multimedia client respectively represents from this SVC code stream in the corresponding relation of descriptor and DTQ sign of code stream, confirms that the process of the DTQ sign that the descriptor that represents code stream that the support of this client plays is corresponding is following:
Said multimedia client confirms therefrom that according to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the received SVC code stream and the corresponding relation of DTQ sign the corresponding DTQ of the descriptor that represents code stream that the support of this client is play identifies.
12. method as claimed in claim 10 is characterized in that,
Said multimedia client respectively represents from this SVC code stream in the corresponding relation of descriptor and DTQ sign of code stream, confirms that the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play refers to:
Said multimedia client receives the corresponding relation that respectively represents the descriptor and the DTQ sign of code stream in this SVC code stream that said multimedia forwarding server sends, and therefrom confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play.
13. the transmission equipment of a multi-medium data is characterized in that, this transmission equipment comprises:
First module, but according to the additional increase information SEI in the layered video coding SVC code stream that will send generate the descriptor that respectively represents code stream that comprised in this SVC code stream and the corresponding relation of space time quality DTQ sign;
Second module, when sending said SVC code stream or before sending said SVC code stream to the multimedia client, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
14. transmission equipment as claimed in claim 13 is characterized in that, this transmission equipment also comprises:
Three module; The source code flow of said SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability, respectively each spatial scalability code stream section is carried out the secondary classification, respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches according to a kind of hierarchical approaches in time domain classification and the quality grading; Be divided into the different code streams that represents; Send to the multimedia client, wherein, respectively represent the corresponding respectively DTQ sign of code stream.
15. the transmission equipment of a multi-medium data is characterized in that, this transmission equipment comprises:
First module, but the source code flow of layered video coding SVC code stream is divided into one or more spatial scalability code stream sections according to spatial scalability;
Second module; Respectively each spatial scalability code stream section is carried out the secondary classification according to a kind of hierarchical approaches in time domain classification and the quality grading; Respectively the code stream section of each secondary classification is carried out three classifications according to another kind of hierarchical approaches, be divided into the different code streams that represents, send to the multimedia client; Wherein, respectively represent the corresponding respectively space time quality DTQ sign of code stream.
16. transmission equipment as claimed in claim 15 is characterized in that, this transmission equipment also comprises:
Three module; According to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the said SVC code stream and the corresponding relation of DTQ sign; When sending said SVC code stream or before sending said SVC code stream to the multimedia client, the corresponding relation of descriptor that respectively represents code stream that transmission is generated and DTQ sign.
17. the receiving equipment of a multi-medium data is characterized in that, this equipment comprises:
First module; But receive layered video coding SVC code stream; From paid-in this SVC code stream, respectively represent in the corresponding relation of descriptor and space time quality DTQ sign of code stream, confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Second module travels through said SVC code stream and carries out decoding and displaying to obtain the corresponding code stream that represents of determined DTQ sign.
18. the receiving equipment of a multi-medium data is characterized in that, this equipment comprises:
First module, but layered video coding SVC code stream received, from this SVC code stream, respectively represent in the corresponding relation of descriptor and space time quality DTQ sign of code stream, confirm the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play;
Second module is selected the corresponding code stream that represents of determined DTQ sign and is carried out decoding and displaying from said SVC code stream.
19. equipment as claimed in claim 18 is characterized in that,
Said first module; According to the descriptor that respectively represents code stream that is comprised in additional this SVC code stream of increase information SEI generation in the received SVC code stream and the corresponding relation of DTQ sign, confirm that therefrom the corresponding DTQ of the descriptor that represents code stream that the support of this client is play identifies.
20. equipment as claimed in claim 18 is characterized in that,
Said first module receives the corresponding relation that respectively represents the descriptor and the DTQ sign of code stream in this SVC code stream that said multimedia forwarding server sends, and therefrom confirms the corresponding DTQ sign of the descriptor that represents code stream that the support of this client is play.
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| CN2011100049828A CN102595203A (en) | 2011-01-11 | 2011-01-11 | Method and equipment for transmitting and receiving multi-media data |
| PCT/CN2012/070161 WO2012094975A1 (en) | 2011-01-11 | 2012-01-10 | Method and device for transmitting and receiving multimedia data |
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