CN108322763A - A kind of method and system of encoding and decoding panoramic video - Google Patents
A kind of method and system of encoding and decoding panoramic video Download PDFInfo
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- CN108322763A CN108322763A CN201610708955.1A CN201610708955A CN108322763A CN 108322763 A CN108322763 A CN 108322763A CN 201610708955 A CN201610708955 A CN 201610708955A CN 108322763 A CN108322763 A CN 108322763A
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
Abstract
A kind of method and system of encoding and decoding panoramic video, method include：Panorama camera is sent to image data buffer unit after shooting obtains panoramic video, by panoramic video；Panoramic video is divided into multiple multi-view video sequences by the image data buffer unit by encoder according to visual angle division rule；Each multi-view video sequence is encoded, multigroup coded data is obtained；User equipment is decoded the coded data by decoder, and the multi-view video sequence obtained to decoding plays out；System includes panorama camera, communication unit and user equipment；The present invention can not only accurately judge user movement trend, and ensure in real time to be decoded the corresponding panoramic videos of effective angular field of view FOV before visual angle according to pretreatment unit, reduce decoding expense.
Description
Technical field
The present invention relates to panoramic video encoding and decoding technique fields, more specifically to a kind of encoding and decoding panoramic video
Method and system.
Background technology
Panoramic video is the main contents carrier that virtual reality imagery is shown, panoramic video is by a series of full-view image frames
The video of composition, intuitive image are that panorama dynamic shows.Full-view image frame is that the scenery of record predetermined angle of view is formed by
Picture frame, for example, predetermined angle of view is 360 ° of level, vertical 180 ° or predetermined angle of view are 360 °, vertical 270 ° etc. of level.It compiles
Code device needs to encode panoramic video, and by the aphorama after coding after obtaining panoramic video by panoramic camera
It takes place frequently and gives decoder and be decoded, by decoding, user can watch panoramic video.
In the prior art, what encoder obtained is all full-view image frames in panoramic video, and to each full-view image
Frame is encoded, using be that the coding rule that H.264/AVC high compression digital video code standard defines is encoded,
Or it is encoded according to the coding rule that H.265 efficient video coding standard defines；To each full-view image of panoramic video
After frame coding, we can obtain gathering by the rectangular area of unit of block, as the coded data of the image frame；It then will be each
Full-view image frame is sent to decoder, and the decoder in user equipment solves the full-view image frame after the coding that sends over
Code will form a complete video and be watched for user after whole full-view image frame decodings.
But the visual angle of user is usually at 150 ° or so in practice, therefore there was only 150 ° of visual angle in full-view image frame
Coded data is effective, remaining coded data is invalid, and receive and encoding and decoding these data can cause it is unnecessary
Decode expense.
Invention content
The purpose of the present invention is to provide a kind of method and systems of encoding and decoding panoramic video, it is intended to solve existing virtual existing
The extra decoding overhead issues of full-view image frame in real image, and how to ensure that real-time corresponds to angular field of view FOV
Panoramic video image frame encoding and decoding problem, and the problem big in irregular head movement Trend judgement difficulty.
The present invention solves its technical problem, and the technological means of use is：A kind of method of encoding and decoding panoramic video is provided, is made
With including panorama camera, communication unit, user equipment, camera group, image data buffer unit, encoder, positioning device, pre-
Processing unit and decoder, include the following steps：
S1, it shoots the panorama camera to obtain panoramic video and is sent to image data buffer unit；
S2, the image data buffer unit are by encoder according to visual angle division rule by each panorama of panoramic video
Image frame is divided into A region according to horizontal view angle, and A is integer, is divided into panoramic video according to head movement trend multiple
Effective multi-view video sequence；
S3, encoder encode the effective multi-view video sequence being made of the full-view image frame of certain viewing angles, obtain
Multigroup coded data；
S4, corresponding coded data is sent to by user equipment, the use by communication unit according to user's viewing visual angle
Family equipment is decoded the coded data by decoder, and the multi-view video sequence obtained to decoding plays out.
Preferably, step S3 includes following sub-step：
S31, panorama camera shoot video by the camera of different direction；
S32, each picture frame that camera group takes in synchronization is spliced, is spliced into full-view image frame；
S33, according to head movement trend data and visual angle division rule, the full-view image frame composition of certain viewing angles is effective
Panoramic video is supplied to encoder.
Preferably, step S4 includes following sub-step：
S41, the head movement trend that user is acquired using the positioning device in user equipment；
S42, encoder determine that presumptive area is corresponding effective in above-mentioned A region according to head movement trend data
Multi-view video sequence；
S43, pretreatment unit determine next panorama according to the head movement trend data of the collected user of positioning device
The size of image frame display time slot.
Preferably, step S41 includes following sub-step：
S411, a reference position point, the position and the specific position of the visual field of user and direction in VR environment are determined
Association；
S412, each movement in each direction to user's head from reference position and each spinning movement carry out with
Track maintains VR environment continuous and true effect to determine how display full-view image frame；
Collected movement tendency data are sent in panorama camera by S413, user equipment.
According to a kind of method of encoding and decoding panoramic video of the present invention, the movement tendency data include being detected user
Head rotation angle and amplitude data.
According to a kind of method of encoding and decoding panoramic video of the present invention, the time slot is the one full-view image exhibition of a certain visual angle
Show duration, is determined by the movement tendency data on the head of the collected user of pretreatment unit.
According to a kind of method of encoding and decoding panoramic video of the present invention, all image frames in a full-view image video
Visual angle division rule it is identical, the summation of the horizontal view angle of A zone viewing angle video sequence is that the total level of full-view image frame regards
Angle, and non-overlapping copies between each region in a full-view image frame.
A kind of system of encoding and decoding panoramic video, including panorama camera, communication unit and user equipment are provided；It is described complete
Scape camera includes the camera group of the camera composition for shooting each orientation video and is shot for storing camera group
The image data buffer unit of the panoramic video arrived, the image data buffer unit include for the aphorama to predetermined angle of view
The encoder that the full-view image frame of frequency is encoded.
The user equipment includes for acquiring the positioning device of user's head movement tendency data, for next panorama
Picture frame shows the pretreatment unit that time slot size is judged in advance and in a user device for the panorama after coding
The decoder that image frame is decoded.
The panorama camera shoots video by the camera of different direction, and the panoramic video taken is sent to institute
Image data buffer unit is stated, the encoder in the image data buffer unit draws panoramic video according to visual angle division rule
It is divided into multiple multi-view video sequences, the encoder encodes each multi-view video sequence, obtains multigroup coded data；Profit
Corresponding panorama coded data is passed through into the communication with the movement tendency data of the collected user's head of the positioning device
Unit is sent in the user equipment；Pretreatment unit is according to the collected user of the positioning device in the user equipment
The movement tendency data on head judge the full-view image frame display time slot of next subrange, and control instruction is sent to institute
Encoder and decoder are stated, the encoder and decoder are regarded according to the movement tendency data and the control instruction to specific
The full-view image frame at angle carries out encoding and decoding.
The method and system for implementing the encoding and decoding panoramic video of the present invention, has the advantages that：Image data caches
Panoramic video is divided into multiple multi-view video sequences by the encoder in unit according to visual angle division rule, by being regarded to each
Angle video sequence is encoded, and multigroup coded data is obtained, and utilizes movement tendency number of the positioning device acquisition to user's head
According to being acquired in real time, user movement trend can not only be accurately judged, and ensure in real time to regarding according to pretreatment unit
The corresponding panoramic video of effective angular field of view FOV is decoded before angle, reduces decoding expense.
Description of the drawings
Fig. 1 is a kind of logical schematic of the system embodiment of encoding and decoding panoramic video of the present invention；
Fig. 2 is a kind of logical schematic of the panorama camera embodiment of the system of encoding and decoding panoramic video of the present invention；
Fig. 3 is a kind of logical schematic of the user equipment of the system of encoding and decoding panoramic video of the present invention；
Fig. 4 is a kind of method flow schematic diagram of encoding and decoding panoramic video of the present invention；
Fig. 5 is step S3 flow diagrams in a kind of embodiment of the method for encoding and decoding panoramic video of the present invention；
Fig. 6 is step S4 flow diagrams in a kind of embodiment of the method for encoding and decoding panoramic video of the present invention；
Fig. 7 is step S41 flow diagrams in a kind of embodiment of the method for encoding and decoding panoramic video of the present invention；
Specific implementation mode
Below in conjunction with drawings and examples the present invention will be further explained explanation.
Fig. 1 is the logical schematic of the system embodiment of the encoding and decoding panoramic video of the present invention, and Fig. 2 is one kind of the present invention
The logical schematic of the panorama camera embodiment of the system of encoding and decoding panoramic video, Fig. 3 are a kind of encoding and decoding panorama of the present invention
The logical schematic of the user equipment of the system of video, as shown in Figs. 1-3, system 100 of the invention include panorama camera 110,
Communication unit 120 and user equipment 130；Panorama camera 110 includes being formed for shooting the camera of each orientation video
Camera group 111 and image data buffer unit 112 for storing the panoramic video that camera group takes, the image
Data buffer storage unit 112 includes the encoder 112a encoded for the full-view image frame of the panoramic video to predetermined angle of view；
The user equipment 130 includes for acquiring the positioning device 131 of user's head movement tendency data, for next panorama sketch
As frame shows the pretreatment unit 132 that time slot size is judged in advance and for the panorama after coding in a user device
The decoder 133 that image frame is decoded.The prior art, what encoder obtained is all full-view image frames in panoramic video,
And each full-view image frame is encoded, the coding H.264/AVC defined using high compression digital video code standard
Rule is encoded, or is encoded according to the coding rule that H.265 efficient video coding standard defines；In user equipment
Decoder is decoded the full-view image frame after the coding that sends over, and it is complete that one will be formed after whole full-view image frame decodings
Video is watched for user.But the visual angle of user is usually at 150 ° or so in practice, therefore there was only 150 ° in full-view image frame
The coded data at visual angle be effective, remaining coded data is invalid, and is received and encoding and decoding these data can cause
Unnecessary decoding expense.
Technical solution proposed by the present invention is：Positioning device 131 is set in user equipment 130, is set in positioning device 131
There are gravity sensor and gyro sensor to detect the movement tendency data of user's head, specially embodies the six of head movement
The parameter of a degree of freedom (the three space coordinates and three angular coordinates) motion conditions for accurately tracking user's head, encoder
112a divides each full-view image frame in panoramic video according to preset visual angle division rule, is divided into
A region, and the user's head movement tendency data that are sended over according to positioning device 131 determine having in A region
The multi-view video sequence of effect, encoder 112a encode it, are equipped with pretreatment unit 132, pretreatment unit in a user device
Judge the full-view image of next subrange according to the movement tendency data of 131 collected user's head of the positioning device
Frame display time slot, and control instruction is sent to encoder 112a and decoder 133, decoder 133 is by effective visual angle of reception
The full-view image frame of video is decoded, and video is presented to user's viewing.
Technical solution proposed by the present invention efficiently solves two technical problems：1. passing through positioning device 131 and coding
The visual angle division rule of device ensures in real time to the corresponding panoramic video coding-decoding operations of effective angular field of view FOV before visual angle；2. logical
Cross positioning device 131 and pretreatment unit 132 can accurate cloud disk head movement trend, select encoded video frame in advance.
Specifically, panorama camera 110 shoots video, and the panorama that will be taken by the camera group 111 of different direction
Video is sent to image data buffer unit 112, and the encoder 112a in image data buffer unit 112 is divided according to visual angle and advised
Panoramic video is then divided into multiple multi-view video sequences, encoder 112a encodes each multi-view video sequence, obtains
Multigroup coded data；Using the movement tendency data of 131 collected user's head of positioning device by corresponding panorama coded number
It is sent in user equipment 130 according to by communication unit 120；Pretreatment unit 132 is according to positioning device in user equipment 130
The movement tendency data of 131 collected user's heads judge the full-view image frame display time slot of next subrange, and will
Control instruction is sent to encoder 112a and decoder 133, and encoder 112a and decoder 133 are according to movement tendency data and control
System instruction carries out encoding and decoding to the full-view image frame of certain viewing angles.
Fig. 4 is a kind of method flow schematic diagram of encoding and decoding panoramic video of the present invention, and Fig. 5 is a kind of volume solution of the present invention
Step S3 flow diagrams in the embodiment of the method for code panoramic video, Fig. 6 are a kind of side of encoding and decoding panoramic video of the present invention
Step S4 flow diagrams in method embodiment, Fig. 7 are step in a kind of embodiment of the method for encoding and decoding panoramic video of the present invention
S41 flow diagrams；
- Fig. 7 is please referred to Fig.4, in a kind of dynamic selective encoding and decoding aphorama based on real time view provided by the invention
In the method for frequency, include the following steps：
S1, panorama camera are sent to image data buffer unit 112 after shooting obtains panoramic video, by panoramic video；
The camera group 111 of panorama camera can be distributed in head-mounted display apparatus and be fastened around in the mechanism on head, can also be with
The VR of user shows equipment separation；The panoramic video that the camera group 111 of panorama camera is shot is stored in image data caching
Unit 112；
S2, the image data buffer unit 112 are drawn panoramic video according to visual angle division rule by encoder 112a
It is divided into multiple multi-view video sequences；The panoramic video received is sent to encoder 112a and carried out by image data buffer unit 112
Processing；
S3, each multi-view video sequence is encoded, obtains multigroup coded data；Encoder 112a is in panoramic video
Each of each full-view image frame encoded；
S4, corresponding coded data is sent to by user equipment 130, the user equipment according to the viewing visual angle of user
130 are decoded the coded data by decoder 133, and the multi-view video sequence obtained to decoding plays out.
Specifically, visual angle division rule is used to indicate encoder 112a carries out region stroke according to whose visual angle to full-view image frame
Point, the visual angle division rule of all full-view image frames in a panoramic video is identical.The level of wherein A time video sequence
The summation at visual angle is the total level visual angle of full-view image frame, and non-overlapping copies between each region in a full-view image frame.
For example, when the total level visual angle of full-view image frame is 360 °, the summation of the horizontal view angle of A multi-view video sequence is 360 °,
For example, the interval range of the horizontal view angle of each region in a full-view image frame may be the same or different, no
It is construed as limiting.If visual angle division rule is to be divided equally into 4 horizontal view angles, the interval range of each horizontal view angle is 90 °, i.e.,
By 0 °~90 ° conducts, one horizontal view angle, 90 °~180 ° conducts, one horizontal view angle, 180 °~270 ° conducts, one level regards
Angle, 270 °~360 ° conducts, one horizontal view angle；Or it when realizing, can be regarded according to the common viewing visual angle of user to determine
Angle division rule, to improve the accuracy of region division, such as the common viewing visual angle of user is 20 °~175 °, then visual angle
Division rule is by 0 °~20 ° conducts, one horizontal view angle, by 20 °~175 ° conducts, one horizontal view angle, by 175 °~360 °
As horizontal view angle.
Preferably, step S31 includes following sub-step：S31, panorama camera are regarded by the camera shooting of different direction
Frequently；S32, each picture frame that all cameras take in synchronization is spliced, is spliced into full-view image frame；S33、
Each full-view image frame forms panoramic video, is supplied to encoder 112a.
When being encoded, it is thus necessary to determine that the zone number of the angular field of view of each image frame, for example, it is assumed that visual angle divides
Rule is is divided equally into 3 horizontal view angles, then for panoramic picture first frame, using the region of 0 °~120 ° of horizontal view angle as
Vision area 1, using the region of 120 °~240 ° of horizontal view angle as vision area 2, using the region of 240 °~360 ° of horizontal view angle as vision area
3；For the second frame of panoramic picture, using the region of 0 °~120 ° of horizontal view angle as vision area 1, by 120 °~240 ° of horizontal view angle
Region is as vision area 2, using the region of 240 °~360 ° of horizontal view angle as vision area 3；And so on, for panoramic picture nth frame,
It, will be horizontal using the region of 120 °~240 ° of horizontal view angle as vision area 2 using the region of 0 °~120 ° of horizontal view angle as vision area 1
The region that 240 °~360 ° of visual angle is as vision area 3.
Preferably, step S4 includes following sub-step S41, acquires user using the positioning device 131 in user equipment 130
Head movement trend；S42, encoder 112a determine presumptive area in above-mentioned A region according to head movement trend data
Corresponding effective multi-view video sequence；S43, pretreatment unit 132 are transported according to the head of 131 collected user of positioning device
Dynamic trend data determines the size of next full-view image frame display time slot.
It is worth noting that, one width of full screen display of common cognition is drawn in time slot proposed by the present invention and not display field
Face is used to drive sweep time, and the length of time slot is that user equipment 130 monitors acquisition in real time according to positioning device 131 in this motion
Exercise data determine；Such as in certain period of time, user watches screen display attentively with a certain fixed visual angle orientation
Local full-view image when, according to preset visual angle division rule, coding is opened up a certain fixed horizontal view angle with decoding
It is existing.And in another more active image interactive link, user be by it is a certain it is capricious in a manner of perceive panoramic video
When, equally, encoder 112a and decoder 133 are showed with the corresponding image in each horizontal view angle of variation.
Step S41 includes following sub-step：S411, a reference position point, the position and user in VR environment are determined
Visual field specific position and directional correlation；S412, to user's head from reference position in each direction it is each movement with
And each spinning movement maintains VR environment continuous and true effect into line trace to determine how display full-view image frame；
Collected movement tendency data are sent in panorama camera by S413, user equipment 130.
In the present embodiment, six are acquired by the way that the gyro sensor in positioning device 131 and gravity sensor is arranged
The newest supplemental characteristic of degree of freedom (three space coordinates and three angular coordinates), so that it is guaranteed that being shown to use by graph data
The visual field at family and the visual field consistency that should actually show.
The method and system of the encoding and decoding panoramic video of the present invention, has the advantages that：Image data buffer unit
Panoramic video is divided into multiple multi-view video sequences by the encoder 112a in 112 according to visual angle division rule, by to every
A multi-view video sequence is encoded, and obtains multigroup coded data, and positioning device 131 is utilized to acquire the movement to user's head
Trend data is acquired in real time, can not only accurately judge user movement trend, and ensure according to pretreatment unit 132
The corresponding panoramic videos of effective angular field of view FOV before visual angle are decoded in real time, reduce decoding expense.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should be included within scope of the presently claimed invention.
Claims (10)
1. a kind of method of encoding and decoding panoramic video, using including panorama camera (110), communication unit (120), user equipment
(130), camera group (111), image data buffer unit (112), encoder (112a), positioning device (131), pretreatment are single
First (132) and decoder (133), which is characterized in that include the following steps：
S1, panorama camera (110) shooting is obtained panoramic video and is sent to image data buffer unit (112)；
S2, the image data buffer unit (112) are by encoder (112a) according to visual angle division rule by panoramic video
Each full-view image frame is divided into A region according to horizontal view angle, and A is integer, is drawn panoramic video according to head movement trend
It is divided into multiple effective multi-view video sequences；
S3, encoder (112a) encode the effective multi-view video sequence being made of the full-view image frame of certain viewing angles, obtain
To multigroup coded data；
S4, corresponding coded data is sent to by user equipment (130) by communication unit (120) according to user's viewing visual angle,
The user equipment (130) is decoded the coded data by decoder (133), the multi-view video sequence obtained to decoding
It plays out.
2. a kind of method of encoding and decoding panoramic video according to claim 1, which is characterized in that step S3 includes following sub-step
Suddenly：
S31, panorama camera (110) shoot video by the camera of different direction；
S32, each picture frame that camera group (111) takes in synchronization is spliced, is spliced into full-view image frame；
S33, according to head movement trend data and visual angle division rule, the full-view image frame of certain viewing angles forms effective panorama
Video is supplied to encoder (112a).
3. a kind of method of encoding and decoding panoramic video according to claim 1, which is characterized in that step S4 includes following sub-step
Suddenly：
S41, the head movement trend that user is acquired using the positioning device in user equipment (130)；
S42, encoder (112a) determine that presumptive area is corresponding effectively in above-mentioned A region according to head movement trend data
Multi-view video sequence；
Under S43, pretreatment unit (132) are determined according to the head movement trend data of positioning device (131) collected user
The size of one full-view image frame display time slot.
4. a kind of method of encoding and decoding panoramic video according to claim 5, which is characterized in that step S41 includes following son
Step：
S411, a reference position point, the specific position and directional correlation of the position and the visual field of user in VR environment are determined；
S412, to user's head from each movement in each direction of reference position and each spinning movement into line trace,
Maintain VR environment continuous and true effect to determine how display full-view image frame；
Collected movement tendency data are sent in panorama camera by S413, user equipment (130).
5. a kind of method of encoding and decoding panoramic video according to claim 1, which is characterized in that the movement tendency data packet
Include the angle and amplitude data of the head rotation of detected user.
6. a kind of method of encoding and decoding panoramic video according to claim 1, which is characterized in that the time slot is a certain visual angle
One full-view image shows duration, is determined by the movement tendency data on the head of the collected user of pretreatment unit.
7. a kind of method of encoding and decoding panoramic video according to claim 1, which is characterized in that in a full-view image video
All image frames visual angle division rule it is identical, the summation of the horizontal view angle of A zone viewing angle video sequence is full-view image
The total level visual angle of frame, and non-overlapping copies between each region in a full-view image frame.
8. providing a kind of system of encoding and decoding panoramic video, which is characterized in that including panorama camera (110), communication unit (120)
And user equipment (130)；The panorama camera (110) includes the camera shooting formed for shooting the camera of each orientation video
Head group (111) and the image data buffer unit (112) for storing the panoramic video that camera group takes, the image
Data buffer storage unit (112) includes the encoder encoded for the full-view image frame of the panoramic video to predetermined angle of view
(112a)。
9. a kind of system of encoding and decoding panoramic video according to claim 10, which is characterized in that the user equipment (130)
Include for acquiring the positioning device of user's head movement tendency data (131), for being set in user to next panoramic image frame
Pretreatment unit (132) that standby middle displaying time slot size is judged in advance and for the full-view image frame progress after coding
Decoded decoder (133).
10. a kind of system of encoding and decoding panoramic video according to claim 10, which is characterized in that the panorama camera passes through
The camera of different direction shoots video, and the panoramic video taken is sent to the image data buffer unit (112),
Panoramic video is divided into multiple by the encoder (112a) in the image data buffer unit (112) according to visual angle division rule
Multi-view video sequence, the encoder (112a) encode each multi-view video sequence, obtain multigroup coded data；It utilizes
The movement tendency data of the collected user's head of the positioning device (131) pass through corresponding panorama coded data described logical
Letter unit (120) is sent in the user equipment (130)；Pretreatment unit (132) is according to institute in the user equipment (130)
The movement tendency data of positioning device (131) collected user's head are stated to judge the full-view image frame exhibition of next subrange
Show time slot, and control instruction is sent to the encoder (112a) and decoder (133), the encoder (112a) and decoding
Device (133) carries out encoding and decoding according to the movement tendency data and the control instruction to the full-view image frame of certain viewing angles.
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| PCT/CN2017/073979 WO2018036112A1 (en) | 2016-08-23 | 2017-02-17 | Method and system for encoding/decoding panoramic video |
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