CN102387359A - Three-dimensional video transmission method, three-dimensional video transmission system and coding and decoding device - Google Patents
Three-dimensional video transmission method, three-dimensional video transmission system and coding and decoding device Download PDFInfo
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Abstract
The invention relates to a three-dimensional video transmission method, which comprises that image signals of the same scene captured by a left video capture device and a right video capture device are respectively regarded as a left visual angle and a right visual angle which are coded and synthesized in the same frame, one visual angle is coded and serves as a basic layer, and the other visual angle is coded and serves as an additional layer; When the playing request is received, coded three-dimensional video streams are sent to a three-dimensional video decoding device; and the basic layer and the additional layer in the coded three-dimensional video streams are decoded and restored respectively to obtain image signals of the left visual angle and image signals of the right visual angle, and then the image signals are played through a display device in overlying mode so as to present a three-dimensional video. The invention further relates to a three-dimensional video transmission system and a coding and decoding device. The image signals of the left visual angle and the image signals of the right visual angle are combined, layered coding is adopted, network loss has small influence on the long-distance transmission and playing of the combined three-dimensional video streams, and a layered coding mode facilities layered decoding or separation and discard treatment of the additional layer according to the situation of a terminal, thereby guaranteeing the playing quality of the terminal.
Description
Technical field
The present invention relates to the 3 D video technology, relate in particular to a kind of 3 D video and compile transmission method and coding and decoding device.
Background technology
The raising of the material and culture level of Along with people's; Produce the demand of watching to the 3D video gradually, associated production manufacturer and organization study and work out 3D coding and transmission standard at present, wherein relate generally to two kinds of 3D code encoding/decoding modes; A kind of is the expression way of video plus depth; Be about to degree of depth sequence and be regarded as one tunnel vision signal, adopt the conventional coding method, the MPEG-2 encoded video is adopted exactly based on the 3DTV scheme of DVB system in Europe; Adopt MPEG-4 or H.264 depth map is encoded, guarantee the compatibility with the conventional two-dimensional video with this; Another kind is the expression way of left and right sides video, and this expression way has two kinds of coded systems, and one of which is an absolute coding, promptly respectively visual angle, left and right sides content is carried out encoding process, and carries out sequential and transmit at interval; Another is about to the merging encoding process that visual angle, left and right sides content walks abreast earlier for merging coding, and 2 sub-pictures after the merging are combined into 1 width of cloth image, and left side one side of something is a left-eye image, and right one side of something is an eye image, can adopt the mode identical with the 2D video to transmit.
In the expression way of left and right sides video, Network Packet Loss can be very big to the quality influence of terminal plays 3D video in transmission course for the mode of absolute coding, and the transmission that is not suitable for long-range network is play, and is confined to local the broadcast; And merge the mode of coding owing to be merged into 1 width of cloth image, and therefore be merely able to the content behind the coding is sent to the terminal, and be difficult to accomplish that demonstration situation and network condition with the terminal are suitable, also can't adjust according to the situation at terminal.
Summary of the invention
The objective of the invention is to propose a kind of 3 D video transmission method, system and coding and decoding device, the transmission that can be fit to long-range network is play, and can handle according to the situation at terminal, guarantees the play quality at terminal.
For realizing above-mentioned purpose, the invention provides a kind of 3 D video transmission method, comprising:
The 3 d video encoding device will synthesize in same frame as LOOK LEFT and LOOK RIGHT coding respectively the picture signal of two video capture device collections about Same Scene images acquired signal; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play;
Three-dimensional video stream after said 3 d video encoding device will be encoded is deposited streaming media server, by said streaming media server streaming media service is provided;
When said streaming media server receives the playing request that the 3 D video decoding device sends, the three-dimensional video stream behind the said coding is sent to said 3 D video decoding device;
The reduction of decoding respectively of basic layer in the three-dimensional video stream of said 3 D video decoding device after and extra play to said coding; Obtain the picture signal of LOOK LEFT and LOOK RIGHT; Then through display device to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
Further; During three-dimensional video stream after said 3 D video decoding device receives said coding; Judge whether said display device possesses the ability of playing 3 D video; If said display device does not possess the ability of playing 3 D video, the extra play in the three-dimensional video stream of then said 3 D video decoding device after to said coding separates and abandons operation, to the reduction of decoding of the basic layer in the three-dimensional video stream behind the said coding.
Further; Said 3 D video decoding device according to the ability of said display device and/or network bandwidth situation when said streaming media server sends playing request; In playing request, carry the expression request and play the identification field of ordinary video; When said streaming media server receives this playing request; Said three-dimensional video stream to self storage is carried out secondary coding, the extra play in the three-dimensional video stream behind the said coding is separated abandoning operation, will comprise that the three-dimensional video stream behind the said coding of basic layer sends to said 3 D video decoding device.
For realizing above-mentioned purpose, the invention provides a kind of 3 d video encoding device, comprising:
The LOOK LEFT signal receiving module is used to receive the picture signal that the left video collecting device is gathered;
The LOOK RIGHT signal receiving module is used to receive with said left video collecting device and gathers the picture signal that the right video capture device of the picture signal of Same Scene is gathered;
The synchronous coding synthesis module; The picture signal that is used for said LOOK LEFT signal receiving module and said LOOK RIGHT signal receiving module are received is synthesized at same frame as LOOK LEFT and LOOK RIGHT coding respectively; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play.
For realizing above-mentioned purpose, the invention provides a kind of 3 D video decoding device, comprising:
Basic layer decoder recovery module is used for the basic layer of reduction of decoding to the three-dimensional video stream behind the said coding;
Extra play decoding recovery module is used for the reduction of decoding of the extra play of the three-dimensional video stream behind the said coding;
Picture signal provides module, and the LOOK LEFT that is used for decoding reduction is obtained and the picture signal of LOOK RIGHT offer display device, so that said display device is to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
Further, also comprise:
Display device ability judge module is used to judge whether said display device possesses the ability of playing 3 D video;
Extra play separates discard module, is used for when confirming that said display device does not possess the ability of playing 3 D video, the extra play in the three-dimensional video stream behind the said coding that receives is separated abandoning operation.
Further, also comprise: adaptive request module, be used for sending playing request to said streaming media server according to the ability and/or the network bandwidth situation of said display device, in said playing request, carry the identification field that ordinary video is play in the expression request.
For realizing above-mentioned purpose, the present invention also provides a kind of 3 D video transmission system that comprises aforementioned 3 D video decoding device, also comprises:
Streaming media server; Be used to preserve the three-dimensional video stream behind the coding; Every frame of said three-dimensional video stream comprises basic layer and extra play; The picture signal at a kind of visual angle in said basic corresponding LOOK LEFT of layer and the LOOK RIGHT, the picture signal at the another kind of visual angle in corresponding LOOK LEFT of said extra play and the LOOK RIGHT.
Further, also comprise aforesaid 3 d video encoding device.
Further; During playing request that said streaming media server also is used for sending in the adaptive request module that receives the 3 D video decoding device; Said three-dimensional video stream to self storing is carried out secondary coding; Extra play in the three-dimensional video stream behind the said coding separated abandoning operation, will comprise that the three-dimensional video stream behind the said coding of basic layer sends to said 3 D video decoding device.
Based on technique scheme; The present invention merges the picture signal at visual angle, the left and right sides; And employing hierarchical coding; It is less that the long Distance Transmission of the three-dimensional video stream after Network Packet Loss is combined is play influence, and the mode of hierarchical coding can be so that network side or end side be carried out the separation discard processing of hierarchical decoding or extra play according to the situation at terminal, thereby guarantee the play quality at terminal.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of an embodiment of 3 D video transmission system of the present invention.
Fig. 2 is the structural representation of an embodiment of 3 D video decoding device of the present invention.
Fig. 3 is the application scenarios sketch map of another embodiment of 3 D video transmission system of the present invention.
Fig. 4 is the structural representation of an embodiment of 3 d video encoding device of the present invention.
Fig. 5 is the schematic flow sheet of an embodiment of 3 D video transmission method of the present invention.
Fig. 6 is the schematic flow sheet of another embodiment of 3 D video transmission method of the present invention.
Fig. 7 is the schematic flow sheet of network side adaptation procedure among the another embodiment of 3 D video transmission method of the present invention.
Embodiment
Through accompanying drawing and embodiment, technical scheme of the present invention is done further detailed description below.
As shown in Figure 1, be the structural representation of an embodiment of 3 D video transmission system of the present invention.In the present embodiment, preserved in the streaming media server 1 of network side and adopted the three-dimensional video stream of hierarchical coding, and the downloading and playing service of three-dimensional video stream is provided.Every frame of the three-dimensional video stream of this hierarchical coding comprises basic layer and extra play, the picture signal at a kind of visual angle in basic corresponding LOOK LEFT of layer and the LOOK RIGHT, the picture signal at the another kind of visual angle in corresponding LOOK LEFT of extra play and the LOOK RIGHT.For instance; The picture signal that can set LOOK LEFT is corresponding to the basic layer in the three-dimensional video stream; And the picture signal of LOOK RIGHT is corresponding to the extra play in the three-dimensional video stream; This setting pass ties up to network side and follows identical rule in advance with end side, perhaps can between network side and end side, hold consultation.
Comprise 3 D video decoding device 2 in end side; This 3 D video decoding device 2 can send the request of obtaining three-dimensional video stream to streaming media server 1; And can be to the reduction of decoding of basic layer and extra play in the three-dimensional video stream behind the coding that receives; After decoding reduction, can the LOOK LEFT after the reduction and the picture signal of LOOK RIGHT be offered display device, so that display device is to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
In the present embodiment; The three-dimensional video stream of the employing hierarchical coding that streaming media server 1 is provided is owing to be the video flowing after merging; Each frame comprises the picture signal at complete visual angle, the left and right sides; Therefore Network Packet Loss is little to the quality influence of terminal actual play; The mode of this merging has avoided absolute coding sequence interval transmission means of the prior art to receive the bigger problem of influence of Network Packet Loss; The mode of hierarchical coding can be carried out terminal or Network adaptation very flexibly in addition, if display terminal does not possess 3D display capabilities or the network bandwidth when being not enough to support three-dimensional video stream, then can guarantee to play or guarantee certain play quality through the extra play in the separation three-dimension video flowing.
As shown in Figure 2, be the structural representation of an embodiment of 3 D video decoding device of the present invention.In the present embodiment, 3 D video decoding device 2 can comprise: basic layer decoder recovery module 21 is used for the basic layer of reduction of decoding to the three-dimensional video stream behind the said coding; Extra play decoding recovery module 22 is used for the reduction of decoding of the extra play of the three-dimensional video stream behind the said coding; Picture signal provides module 23, and the LOOK LEFT that is used for decoding reduction is obtained and the picture signal of LOOK RIGHT offer display device, so that said display device is to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
Because three-dimensional video stream has adopted hierarchical coding, this coded system can be carried out the separation of the picture signal at visual angle, the left and right sides very easily, and this just provides terminal adaptation ability more flexibly.In another embodiment, the 3 D video decoding device can also comprise that display device ability judge module separates discard module with extra play.Whether this display device ability judge module is used for display device to its connection possesses the ability of playing 3 D video and judges; When confirming that said display device does not possess the ability of playing 3 D video; Can separate discard module through extra play, the extra play in the three-dimensional video stream behind the said coding that receives separated abandoning operation.
If the streaming media server of network side possesses the ability of adjustment three-dimensional video stream; Then adaptive request module can be set in the 3 D video decoding device; This module can be sent playing request to streaming media server according to the ability and/or the network bandwidth situation of display device; In playing request, carry the expression request and play the identification field of ordinary video; Streaming media server is when receiving this playing request; Can carry out secondary coding to the said three-dimensional video stream of self storage, the extra play in the three-dimensional video stream behind the said coding separated abandoning operation, will comprise that the three-dimensional video stream behind the said coding of basic layer sends to said 3 D video decoding device.
As shown in Figure 3, be the application scenarios sketch map of another embodiment of 3 D video transmission system of the present invention.Compare with a last embodiment; Present embodiment also comprises 3 d video encoding device 3; This device can synthesize the picture signal to two video capture device collections about Same Scene images acquired signal in same frame as LOOK LEFT and LOOK RIGHT coding respectively; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play.
As shown in Figure 4, be the structural representation of an embodiment of 3 d video encoding device of the present invention.In the present embodiment, 3 d video encoding device 3 comprises: LOOK LEFT signal receiving module 31, LOOK RIGHT signal receiving module 32 and synchronous coding synthesis module 33.Wherein LOOK LEFT signal receiving module 31 is used to receive the picture signal that the left video collecting device is gathered.LOOK RIGHT signal receiving module 32 is used to receive with the left video collecting device gathers the picture signal that the right video capture device of the picture signal of Same Scene is gathered.The picture signal that synchronous coding synthesis module 33 is used for LOOK LEFT signal receiving module 31 and LOOK RIGHT signal receiving module 32 are received is synthesized at same frame as LOOK LEFT and LOOK RIGHT coding respectively; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play.
In cataloged procedure, visual angle, the left and right sides content of every frame is the picture signal that synchronization left and right sides video capture device is gathered Same Scene, and the difference absolute coding, and is merged in the same frame.The coded system of LOOK LEFT or LOOK RIGHT can adopt existing 2D video coding mode; When end side is carried out the 3D video playback; Can from the three-dimensional video stream of layering, restore the picture signal of LOOK LEFT and LOOK RIGHT; And then through display device to the broadcast that superposes of the picture signal of LOOK LEFT and LOOK RIGHT, to present 3 D video.
As shown in Figure 5, be the schematic flow sheet of an embodiment of 3 D video transmission method of the present invention.Based on previous embodiment, the 3 D video transmission course of present embodiment comprises:
Three-dimensional video stream after step 102, said 3 d video encoding device will be encoded is deposited streaming media server, by said streaming media server streaming media service is provided;
The reduction of decoding respectively of basic layer in step 104, the said 3 D video decoding device three-dimensional video stream after to said coding and extra play obtains the picture signal of LOOK LEFT and LOOK RIGHT;
The three-dimensional video stream of layering can provide according to terminal capability or the flexible adaptive basis of network condition, and adaptation procedure can realize at network side, also can realize in end side, and the embodiment that will provide these two kinds of implementations below is as explanation.
As shown in Figure 6, be the schematic flow sheet of another embodiment of 3 D video transmission method of the present invention.Compare with a last embodiment, present embodiment also comprises after step 103:
When the 3 D video decoding device of step 103a, end side receives the three-dimensional video stream behind the coding; Judge whether display device possesses the ability of playing 3 D video; If display device does not possess the ability of playing 3 D video, execution in step 103b then, otherwise execution in step 104;
Extra play in step 103b, the 3 D video decoding device three-dimensional video stream after to said coding separates and abandons operation, to the reduction of decoding of the basic layer in the three-dimensional video stream behind the said coding, obtains the picture signal at the visual angle of basic layer correspondence;
Step 103c, the picture signal at the corresponding visual angle of basic layer is play through display device.
Present embodiment has been accomplished the adaptive of three-dimensional video stream in the 3 D video decoding device of end side; Because some terminal possibly only have the ability to play of two-dimensional video; And can't handle 3 D video, if this moment the extra play in the three-dimensional video stream is removed, form the picture signal of the two-dimensional video that includes only basic layer; Then this terminal can be play, and guarantees certain result of broadcast.And the three-dimensional video stream of the merging of traditional approach coding, it can't extract the picture signal of two-dimensional video, therefore can't on the terminal of only supporting the two-dimensional video ability to play, play.
Except carrying out the adaptive of three-dimensional video stream in end side; Sometimes except the problem of terminal capability; The possible network bandwidth also can cause certain restriction to playing three-dimensional video stream, so the present invention also proposes to carry out at network side the adaptive scheme of three-dimensional video stream.As shown in Figure 7, be the schematic flow sheet of network side adaptation procedure among the another embodiment of 3 D video transmission method of the present invention.Network side adaptation procedure in the present embodiment comprises:
Ordinary video in the present embodiment is meant the two-dimensional video with respect to 3 D video; The playing request that streaming media server can send according to the 3 D video decoding device; The separation of extra play in the three-dimensional video stream is abandoned; The three-dimensional video stream that obtains comprises the coding of basic layer, and its network bandwidth that takies is less than 3 D video, and it is applicable to various terminals.The network side adaptation scheme can also be preserved this ordinary video, and directly offers the 3 D video decoding device that sends this playing request, does not more possess the not enough terminal use of the 3 D video ability to play or the network bandwidth so that satisfy.
One of ordinary skill in the art will appreciate that: all or part of step that realizes said method embodiment can be accomplished through the relevant hardware of program command; Aforesaid program can be stored in the computer read/write memory medium; This program the step that comprises said method embodiment when carrying out; And aforesaid storage medium comprises: various media that can be program code stored such as ROM, RAM, magnetic disc or CD.
Should be noted that at last: above embodiment is only in order to technical scheme of the present invention to be described but not to its restriction; Although with reference to preferred embodiment the present invention has been carried out detailed explanation, the those of ordinary skill in affiliated field is to be understood that: still can specific embodiments of the invention make amendment or the part technical characterictic is equal to replacement; And not breaking away from the spirit of technical scheme of the present invention, it all should be encompassed in the middle of the technical scheme scope that the present invention asks for protection.
Claims (10)
1. 3 D video transmission method comprises:
The 3 d video encoding device will synthesize in same frame as LOOK LEFT and LOOK RIGHT coding respectively the picture signal of two video capture device collections about Same Scene images acquired signal; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play;
Three-dimensional video stream after said 3 d video encoding device will be encoded is deposited streaming media server, by said streaming media server streaming media service is provided;
When said streaming media server receives the playing request that the 3 D video decoding device sends, the three-dimensional video stream behind the said coding is sent to said 3 D video decoding device;
The reduction of decoding respectively of basic layer in the three-dimensional video stream of said 3 D video decoding device after and extra play to said coding; Obtain the picture signal of LOOK LEFT and LOOK RIGHT; Then through display device to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
2. 3 D video transmission method according to claim 1; Wherein during the three-dimensional video stream after said 3 D video decoding device receives said coding; Judge whether said display device possesses the ability of playing 3 D video; If said display device does not possess the ability of playing 3 D video; Extra play in the three-dimensional video stream of then said 3 D video decoding device after to said coding separates and abandons operation, to the reduction of decoding of the basic layer in the three-dimensional video stream behind the said coding.
3. 3 D video transmission method according to claim 1; Wherein said 3 D video decoding device according to the ability of said display device and/or network bandwidth situation when said streaming media server sends playing request; In playing request, carry the expression request and play the identification field of ordinary video; When said streaming media server receives this playing request; Said three-dimensional video stream to self storage is carried out secondary coding, the extra play in the three-dimensional video stream behind the said coding is separated abandoning operation, will comprise that the three-dimensional video stream behind the said coding of basic layer sends to said 3 D video decoding device.
4. 3 d video encoding device comprises:
The LOOK LEFT signal receiving module is used to receive the picture signal that the left video collecting device is gathered;
The LOOK RIGHT signal receiving module is used to receive with said left video collecting device and gathers the picture signal that the right video capture device of the picture signal of Same Scene is gathered;
The synchronous coding synthesis module; The picture signal that is used for said LOOK LEFT signal receiving module and said LOOK RIGHT signal receiving module are received is synthesized at same frame as LOOK LEFT and LOOK RIGHT coding respectively; Wherein a kind of coding of picture signal of visual angle is made as basic layer, and the coding of the picture signal at another kind of visual angle is made as extra play.
5. 3 D video decoding device comprises:
Basic layer decoder recovery module is used for the basic layer of reduction of decoding to the three-dimensional video stream behind the said coding;
Extra play decoding recovery module is used for the reduction of decoding of the extra play of the three-dimensional video stream behind the said coding;
Picture signal provides module, and the LOOK LEFT that is used for decoding reduction is obtained and the picture signal of LOOK RIGHT offer display device, so that said display device is to the broadcast that superposes of the picture signal of said LOOK LEFT and LOOK RIGHT, to present 3 D video.
6. 3 D video decoding device according to claim 5 wherein also comprises:
Display device ability judge module is used to judge whether said display device possesses the ability of playing 3 D video;
Extra play separates discard module, is used for when confirming that said display device does not possess the ability of playing 3 D video, the extra play in the three-dimensional video stream behind the said coding that receives is separated abandoning operation.
7. 3 D video decoding device according to claim 5 wherein also comprises:
Adaptive request module is used for sending playing request according to the ability and/or the network bandwidth situation of said display device to said streaming media server, in said playing request, carries the identification field that ordinary video is play in the expression request.
8. 3 D video transmission system that comprises the arbitrary described 3 D video decoding device of claim 5～7 also comprises:
Streaming media server; Be used to preserve the three-dimensional video stream behind the coding; Every frame of said three-dimensional video stream comprises basic layer and extra play; The picture signal at a kind of visual angle in said basic corresponding LOOK LEFT of layer and the LOOK RIGHT, the picture signal at the another kind of visual angle in corresponding LOOK LEFT of said extra play and the LOOK RIGHT.
9. 3 D video transmission system according to claim 8 wherein also comprises the described 3 d video encoding device of claim 4.
10. 3 D video transmission system according to claim 8; During playing request that wherein said streaming media server also is used for sending in the adaptive request module that receives the 3 D video decoding device; Said three-dimensional video stream to self storing is carried out secondary coding; Extra play in the three-dimensional video stream behind the said coding separated abandoning operation, will comprise that the three-dimensional video stream behind the said coding of basic layer sends to said 3 D video decoding device.
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Application publication date: 20120321 |