CN108076301A - The method for processing video frequency and system of VoLTE video multi-party telephones - Google Patents
The method for processing video frequency and system of VoLTE video multi-party telephones Download PDFInfo
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- CN108076301A CN108076301A CN201610993094.6A CN201610993094A CN108076301A CN 108076301 A CN108076301 A CN 108076301A CN 201610993094 A CN201610993094 A CN 201610993094A CN 108076301 A CN108076301 A CN 108076301A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
- H04N7/147—Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/1016—IP multimedia subsystem [IMS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/613—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for the control of the source by the destination
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/762—Media network packet handling at the source
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- Computer Networks & Wireless Communication (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Telephonic Communication Services (AREA)
Abstract
The present invention provides a kind of method for processing video frequency and system of VoLTE videos multi-party telephone.The method for processing video frequency comprises the following steps：Raw video image is gathered in video sending end, the second video image of the first video image and second resolution that generate first resolution is encoded according to raw video image, and the first video image and the second video image are sent, first resolution is less than second resolution；The first video image and the second video image of each video sending end are received in multimedia server, and receive video receiver and select signaling for the video resolution of each video sending end, according to corresponding video image in each video sending end of video resolution selection signaling transmission to each video receiver；It in video receiver, according to the region configuration-direct of the video image to each video sending end, generates and selects signaling for the video resolution of each video sending end, and the video image of each video sending end is received from multimedia server, decode and show video image.
Description
Technical field
At VoLTE visual telephone business more particularly to a kind of video of VoLTE videos multi-party telephone
Manage method and system.
Background technology
VoLTE (Voice over LTE) visual telephone business is one of core business of 4G communications, and video leads in many ways
Words are one of critical functions, can realize the functions such as more people's video conferences, Video chat.Usual VoLTE business uses SIP
Signaling controls communication process, and audio, video data is transmitted by RTP/RTCP.
The VoLTE systems of business deployment at present only support voice multi-party call, and there are no video multi-party call functions.From skill
Art angle sees that the main problem that video multi-party call faces is the multi-path video data processing being related to, either to terminal still
It is all very big to network pressure.When number of particularly conversing is more, traditional tupe can not be competent at.
For example, according to a kind of video format requirements for meeting commercial operation requirement：Give tacit consent to VGA (640 × 480 pictures
Element), backward compatible QVGA (320 × 240 pixel) form.Assuming that realize 5 side's video callings, existing several technical solution difference
It is described as follows.
First method, each terminal sends the image that local terminal gathers according to VGA said shanks, while receives other 4
The VGA format video datas just sended over, are then decoded respectively, finally show 4 great distance end images and 1 tunnel on the screen
Local terminal image.This method realizes simple, (as long as forwarding video data) relatively low to core net requirement, but to radio bearer and end
The processing capacity requirement at end is high.Compared to folk prescription video calling (the common 2Mbps bandwidth of uplink and downlink), 5 sides call needs 5Mbps bands in total
Width is original 2.5 times.Therefore this method occupancy radio resource is more, it is required that being difficult to be satisfied in weak letter point.In addition, eventually
End needs to support 1 road VGA codings and 4 road VGA decodings, 3 road VGA decodings is had more than single-party call, to the overhead of codec
Increase by 1 times or more, be either all very inappeasable requirement for processing capacity or system power dissipation.
Second method, each terminal sends QVGA format videos, while receives the QVGA that other 4 terminals send over
Video, then decoding display.Video coding is reduced to QVGA by this method on the basis of first method, and core net still only turns
Hair video data is not dealt with.Since the data volume of QVGA videos is about the 1/4 of VGA videos, can so substantially reduce pair
The pressure of terminal radio bearer and codec, 5 side QVGA calls overhead is substantially and 1 road VGA single-party calls are similar.But
The shortcomings that program is maximum is that video definition substantially reduces, either party can only provide the image of QVGA resolution ratio, can not
Meet VOLTE HD videos this basic demands.
The third method, each terminal each send VGA format videos, then carry out video code conversion by server, will be each
It is synthesized after the video image decoding of road, then is re-encoded as VGA videos all the way and is sent to each terminal.This method is for terminal
It is equivalent to and is carrying out folk prescription video calling (VGA uplinks, all the way VGA downlinks all the way), so there is no any pressure to terminal.But
Data processing amount is very big for server, since the distal view that each terminal is seen is as being all different, so server
Separately encoded to each terminal, this just needs to be carried out at the same time 5 road VGA decodings and 5 road VGA codings.Although voice multi-party call
Real-time transcoding is exactly completed by server, but the treating capacity of video is more much higher than audio, it is desirable that network side is such to complete
Substantial amounts of video data real-time transcoding is also unrealistic.
The content of the invention
The technical problem to be solved in the present invention is to provide the method for processing video frequency and system of VoLTE video multi-party telephones, both
Can meet the clarity demand of video multi-party call, at the same be to wireless transmission bandwidth and video data processing burden requirement can be with
It bears.
In order to solve the above technical problems, the present invention provides a kind of method for processing video frequency of VoLTE videos multi-party telephone, bags
Include following steps：In one or more video sending ends：Raw video image is gathered, is encoded and produced according to the raw video image
First video image of raw first resolution and the second video image of second resolution, and send first video image and
Second video image, the first resolution are less than the second resolution；In multimedia server：Receive each video sending end
First video image and the second video image, and receive one or more video receivers for each video sending end
Video resolution selects signaling, according to the video resolution signaling is selected to send corresponding video image in each video sending end
To each video receiver；In one or more video receivers, configured according to the region of the video image to each video sending end
Instruction generates and selects signaling for the video resolution of each video sending end, and receives each video from the multimedia server
The video image of transmitting terminal decodes and shows the video image.
In one embodiment of this invention, the first video for generating first resolution is encoded according to the raw video image
The step of second video image of image and second resolution, includes：The raw video image is down-sampled to described first point
Resolution is then encoded into first video image, wherein the raw video image is the second resolution；Described in acquisition
The reconstruction data of first video image, and by the upsampling data of rebuilding to the second resolution；By second resolution
Data are rebuild to subtract each other to obtain Image Residual value with the raw video image；Described image residual values are encoded, wherein after coding
Image Residual value forms second video image with first video image.
In one embodiment of this invention, when video resolution selection signaling shows that the first video receiver needs to come
From the video image of the first resolution of the first video sending end when, send the first video figure from the multimedia server
As giving first video receiver；When video resolution selection signaling shows that the first video receiver is needed from first
During the video image of the second resolution of video sending end, first video image is sent to institute from the multimedia server
State the second video receiver.
In one embodiment of this invention, when the region configuration-direct of the second video receiver sends the second video
The video image at end is configured at first size region, and second video receiver, which generates, indicates regarding for the first resolution
Frequency division resolution selects signaling；When the region configuration-direct of the second video receiver is by the video image of the second video sending end
In the second size area, second video receiver generates the video resolution selection for indicating the second resolution for configuration
Signaling, second size area are more than the first size region.
In one embodiment of this invention, when the region configuration-direct of the second video receiver sends the second video
The video image at end is configured at first size region, and second video receiver receives first video image, decoding
After be shown in the first size region；When the region configuration-direct of the second video receiver is by the second video sending end
Video image is configured in the second size area, and the second video image described in second video receiver is shown in after decoding
Second size area.
In one embodiment of this invention, above-mentioned method for processing video frequency is additionally included in one or more of video receptions
End generates the region configuration-direct according to the handover operation of user.
In one embodiment of this invention, above-mentioned method for processing video frequency is additionally included in one or more of video receptions
End generates the region configuration-direct according to predeterminable area configuration.
In one embodiment of this invention, the video sending end and the video receiver are integrated in same call terminal
In.
The present invention also proposes a kind of processing system for video of VoLTE videos multi-party telephone, is sent out including one or more videos
Sending end, multimedia server and one or more video receivers.Video sending end is for gathering raw video image, according to institute
It states raw video image coding and generates the first video image of first resolution and the second video image of second resolution, and send out
First video image and the second video image are sent, the first resolution is less than the second resolution.Multimedia service
Device is used to receive first video image and the second video image of each video sending end, and receives one or more videos and connect
Receiving end selects signaling for the video resolution of each video sending end, according to the video resolution signaling is selected to send each video
Corresponding video image gives each video receiver in transmitting terminal.Video receiver is used for according to the video figure to each video sending end
The region configuration-direct of picture generates and selects signaling for the video resolution of each video sending end, and from the multimedia service
Device receives the video image of each video sending end, decodes and shows the video image.
The present invention also proposes a kind of method for processing video frequency of VoLTE videos multi-party telephone, comprises the following steps：When call is whole
When end is as video sending end, raw video image is gathered, is encoded according to the raw video image and generates first resolution
Second video image of the first video image and second resolution, and first video image and the second video image are sent,
The first resolution is less than the second resolution；When call terminal is as video receiver, connect from multimedia server
The video image of each video sending end is received, decode and shows the video image, and according to the video figure to each video sending end
The region configuration-direct of picture generates and selects signaling for the video resolution of each video sending end.
The present invention also proposes a kind of call terminal for VoLTE video multi-party call, including image capture device, coding
Device, processing unit, transmitting element receiving unit, decoder and display unit.Image capture device gathers raw video image.It compiles
Code device encodes the first video image of generation first resolution according to the raw video image and the second of second resolution regards
Frequency image, the first resolution are less than the second resolution.Processing unit according to participate in video multi-party call other
The region configuration-direct of the video image of call terminal generates and selects letter for the video resolution of other call terminals
Order.Transmitting element sends first video image and the second video image and video resolution selection signaling.It receives
Unit receives the video image of other call terminals.Decoder decodes the video image.Display unit regards described in showing
Frequency image.
In one embodiment of this invention, the encoder includes：Downsampling unit will adopt under the raw video image
Sample is to the first resolution, wherein the raw video image is the second resolution；First coding unit, by down-sampling
Rear video data encoding is into first video image；Up-sampling unit obtains the reconstruction data of first video image, and
By the reconstruction upsampling data to the second resolution；Residual computations unit, by the reconstruction data of second resolution and institute
Raw video image is stated to subtract each other to obtain Image Residual value；Second coding unit encodes described image residual values, wherein after coding
Image Residual value forms second video image with first video image.
In one embodiment of this invention, when the region configuration-direct of the call terminal is whole by other a certain calls
The video image at end is configured at first size region, and the processing unit, which generates, indicates that the video of the first resolution is differentiated
Rate selects signaling；When the region configuration-direct of the call terminal exists the video image configuration of other a certain call terminals
During the second size area, the processing unit generates the video resolution selection signaling for indicating the second resolution, and described the
Two size areas are more than the first size region.
In one embodiment of this invention, when the region configuration-direct of the call terminal is whole by other a certain calls
The video image at end is configured at first size region, and the first size area is shown in after the decoder decoding video images
Domain；When the region configuration-direct of the video terminal configures the video image of other a certain call terminals in the second size
During region, the decoder will include after second video image decoding in second size area.
In one embodiment of this invention, the region configuration-direct is handover operation and/or the preset areas according to user
Configuration of territory generates.
The above-mentioned technical proposal of the present invention introduces the coding mode of multiresolution, in the case where not increasing hardware resource
Multi-channel video effect is realized, compared to being had the advantage that for currently existing scheme：
First, radio bearer bandwidth need not be significantly increased, the upstream and downstream bandwidth of each terminal compares phase with single-party call
It is poor little, multi-channel video transmission is can be achieved under existing wireless environment.
Second, terminal processes load will not be rolled up, overall video treating capacity is close with single-party call, will not be apparent
Increase the pressure to system and Video Codec.
3rd, low to core net requirement, core net only needs to carry out data forwarding, and video data need not be turned
Code, need not largely upgrade network.
4th, the video speech quality of high definition is kept, video definition will not be reduced.
Description of the drawings
Fig. 1 is the processing system for video framework of VoLTE video multi-party telephones according to embodiments of the present invention.
Fig. 2 is the method for processing video frequency flow chart of VoLTE video multi-party telephones according to embodiments of the present invention.
Fig. 3 is the video transmitting portion framework of VoLTE videos multi-party telephone according to an embodiment of the invention.
Fig. 4 is coder structure according to an embodiment of the invention.
Fig. 5 is the video reception part framework of VoLTE videos multi-party telephone according to an embodiment of the invention.
Fig. 6 is decoder architecture according to an embodiment of the invention.
Fig. 7, Fig. 8 are the various dispaly states of call terminal according to an embodiment of the invention.
Fig. 9 is the processing system for video example of the present invention.
Specific embodiment
For the above objects, features and advantages of the present invention can be clearer and more comprehensible, below in conjunction with attached drawing to the tool of the present invention
Body embodiment elaborates.
Many details are elaborated in the following description to facilitate a thorough understanding of the present invention, still the present invention can be with
Implemented using other different from other manner described here, therefore the present invention is from the limit of following public specific embodiment
System.
The embodiment of the present invention describes the video call system and method for VoLTE video multi-party telephones.This system and side
Method can meet the needs of HD video multi-party call, while can realize call under existing wireless transmission bandwidth again, and regard
Frequency data process load is in acceptable degree.
Video processing architecture
Fig. 1 is the processing system for video framework of VoLTE video multi-party telephones according to embodiments of the present invention.With reference to 1 institute of figure
Show, the processing system for video 100 of the present embodiment may include multiple call terminals 101 and multimedia server 102.Call terminal
101 can be the mobile electronic devices such as smart mobile phone, tablet computer, laptop.These call terminals 101 access LTE nets
Network, and can communicate with the multimedia server 102 of network side.
In an embodiment of the present invention, in the typical case, each call terminal 101 can both be used as video to send
End, can also be used as video receiver.Certainly, under special circumstances, a part of can only be used as of each call terminal 101 regards
Take place frequently sending end, and another part can be used as video receiver.For convenience of explanation, using call terminal 101 as video sending end
State and state as video receiver be described by respectively.It will be understood by those skilled in the art that both states can
To coexist in simultaneously or asynchronously in same call terminal.
Video sending end can gather raw video image, encoded video image, and send encoded video image.Depending on
Frequency receiving terminal can receive video image, and decoding video images show decoded video image.Multimedia server 102 can be with
By the encoded video image transmitted by video sending end, video receiver is transmitted to.
Fig. 2 is the method for processing video frequency flow chart of VoLTE video multi-party telephones according to embodiments of the present invention.With reference to figure 2
Shown, the method for processing video frequency of the present embodiment may include following steps.
It is the operation performed in one or more video sending ends in step 210, including：
In step 211, raw video image is gathered.
In step 212, the first video image for generating first resolution and second is encoded according to raw video image and is differentiated
Second video image of rate, wherein first resolution are less than second resolution.
In step 213, the first video image and the second video image are sent.
It is the operation performed in multimedia server in step 220, including：
In step 221, the first video image and the second video image of each video sending end are received.
In step 222, receive one or more video receivers and select letter for the video resolution of each video sending end
Order.
Corresponding video image is to each video in step 223, each video sending end of video resolution selection signaling transmission
Receiving terminal.
It is the operation performed in one or more video receivers in step 230, including：
In step 231, according to the region configuration-direct of the video image to each video sending end, generate and sent out for each video
The video resolution selection signaling of sending end.
In step 232, the video image of each video sending end is received from multimedia server.
In step 233, the video image of reception is decoded.
In step 234, decoded video image is shown.
It is appreciated that although above-mentioned step describes in particular order, the order of this description does not have to simultaneously
It is only capable of in the described sequence performing to limit these steps.Those skilled in the art's principle according to the present invention can be with
Understand, some steps may be performed simultaneously, and the execution sequence of some steps can overturn.
The further detail below of the above method is described here in conjunction with processing system for video.Video sending end can gather original regard
Frequency image.Specifically, in video call process, video image is gathered by camera by video sending end, is input to and regards
Subsequent processing is carried out inside the sending end that takes place frequently.Then, first is generated according to raw video image coding inside video sending end to differentiate
First video image of rate and the second video image of second resolution.Here, first resolution is less than second resolution.With biography
Unlike way of uniting, video sending end encodes the video image for generating Resolutions simultaneously in the present embodiment.Citing comes
It says, video sending end can generate VGA (resolution ratio is 640 × 480 pixels) video images of form and QVGA (resolution ratio simultaneously
For 320 × 240 pixels) video image of form.It is appreciated that resolution ratio here is only example.Such as art technology
What personnel were understood, when both sides or more just converse, video receiver would generally show regarding for one party with large scale region
Frequency image, and show with small size region the video image of other each side (call includes one's own side).Therefore the two of video sending end
Kind resolution ratio will be suitable for the display area of two kinds of sizes of video receiver.Of course it is to be understood that if video receiver is matched somebody with somebody
It is set to the display area of more Dimension Types, then video sending end can also encode the video figure for generating the 3rd resolution ratio
Picture.Afterwards, video sending end sends the first video image and the second video image.
Multimedia server can receive the first video image and the second video image of each video sending end, be forwarded
To the video receiver of needs.It is sent here, multimedia server can receive one or more video receivers for each video
The video resolution selection signaling at end, selects signaling to send corresponding in each video sending end regard according to these video resolutions
Frequency image gives each video receiver.Specifically, when a certain video receiver of one or more video receivers (is referred to as herein
For the first video receiver) be sent to multimedia server video resolution selection signaling show this first video receiver
When needing the video image of the first resolution from a certain video sending end (referred to here as the first video sending end), multimedia
Server sends the first video image to the first video receiver.When the video resolution of this first video receiver selects signaling
When showing that this first video receiver needs the video image of the second resolution from the first video sending end, multimedia clothes
Device the second video image of transmission be engaged in first video receiver.First video receiver is regarded for other video sending ends
Frequency division resolution selects signaling, can also be similarly processed.Similarly, other video receivers issue multimedia server for respectively regarding
The video resolution selection signaling for the sending end that takes place frequently, can also be similarly processed.
Video receiver is generated and sent out for each video according to the region configuration-direct of the video image to each video sending end
The video resolution selection signaling of sending end.Also, video receiver receives the video of each video sending end from multimedia server
Image, decoding video images simultaneously show video image.Specifically, when a certain video receiver (referred to herein as the second video
Receiving terminal) region configuration-direct the video image of the second video sending end is configured at first size region, the second video
Receiving terminal generates the video resolution selection signaling of instruction first resolution；When the region configuration-direct of this second video receiver
The video image of second video sending end is configured in the second size area, the second video receiver generates instruction second and differentiates
The video resolution selection signaling of rate.Here, the second size area is more than first size region.Correspondingly, when the second video connects
The region configuration-direct of receiving end configures the video image of the second video sending end at first size region, the second video reception
End receives the first video image, and first size region is shown in after decoding；When the region configuration-direct of the second video receiver will
The video image of second video sending end is configured in the second size area, and second video receiver receives the second video figure
Picture is shown in the second size area after decoding.
From the point of view of call terminal, a kind of method for processing video frequency of VoLTE videos multi-party telephone of the embodiment of the present invention,
Comprise the following steps：
When call terminal is as video sending end, raw video image is gathered, is encoded and generated according to raw video image
First video image of first resolution and the second video image of second resolution, and send the first video image and second and regard
Frequency image, first resolution are less than second resolution；
When call terminal is as video receiver, referred to according to the configuration of the region of the video image to each video sending end
Order generates and selects signaling for the video resolution of each video sending end, and receives each video sending end from multimedia server
Video image, decode and show video image.
In the present embodiment, since the multi-path video data that each call terminal 101 receives (corresponds to other each calls
Side) in, only video data needs show that remaining shows for zonule mode, so multimedia server with big region all the way
102 can select according to the current user of each call terminal 101, for that video data turn all the way for needing that big region show
The video image of high-resolution (such as VGA) is sent out, low resolution is only forwarded for that a few road video data that zonule is only needed to show
The video image of rate (such as QVGA).In this way, under conditions of meeting the needs of HD video multi-party call, and can be existing wireless
Call is realized under transmission bandwidth, and video data handles load in acceptable degree.
Video transmitting portion framework
Fig. 3 is the video transmitting portion framework of VoLTE videos multi-party telephone according to an embodiment of the invention.With reference to figure 3
Shown, the video transmitting portion of the present embodiment may include image capture device 301, encoder 302 and transmitting element 303.Figure
As collecting device 301 can gather raw video image.Encoder 302 encodes according to raw video image and generates first resolution
Second video image of the first video image and second resolution, first resolution are less than the second resolution.Transmitting element
303 send the first video image and the second video image.
Exemplified by using VGA forms and QVGA forms as the video image of Resolutions, first by being used as Image Acquisition
The camera of equipment collects VGA format-patterns, and VGA format-patterns are carried out VGA Video codings and QVGA Video codings.Then
It is sent after two-way coded data is carried out RTP packings.
In the preferred embodiment, with the second video image complete the is replaced compared with the residual image of the first video image
Two video images are sent, to save network bandwidth.Specifically, Fig. 4 is coder structure according to an embodiment of the invention, ginseng
It examines shown in Fig. 4, encoder may include downsampling unit 401, the first coding unit 402, up-sampling unit 403, residual computations list
404 and second coding unit 405 of member.Raw video image is down-sampled to first resolution by downsampling unit 401, wherein original
Video image is second resolution.First coding unit 402 is by down-sampling rear video data encoding into the first video image.On adopt
Sample unit 403 obtains the reconstruction data of the first video image, and will rebuild upsampling data to second resolution.Residual computations list
The reconstruction data of second resolution and raw video image are subtracted each other to obtain Image Residual value by member 404.Second coding unit 405
Image Residual value is encoded, wherein encoded images residual values form the second video image with the first video image.
In the above embodiments, it is assumed that raw video image is second resolution.It is appreciated that there are original video figures
The high resolution of picture is also to original video figure in the situation of second resolution, at this time the Image Residual value of the second video image
It is generated as being encoded after down-sampling.
Exemplified by using VGA forms and QVGA forms as the video image of Resolutions, in coding, first by VGA forms
Then image down sampling carries out QVGA Video codings, while the reconstruction data after QVGA codings is taken out from encoder to QVGA
(encoder can preserve reconstruction data, as subsequent reference frame, can be come out with direct copying), then the QVGA video datas by reconstruction
Up-sampling is to VGA, and then with original acquisition image subtraction, obtained Image Residual value (is equivalent to the high frequency division of original image
Amount).Then residual error data is subjected to VGA Video codings.
By the embodiment optimized above, the VGA images of acquired original are finally encoded into 2 road video datas, all the way QVGA
Form includes the image of low frequency part, and another way VGA forms include high frequency section residual error data, finally by RTP transmission of video
2 road video datas are sent at most media server by passage.
Video reception part framework
The video reception part framework of Fig. 5 VoLTE videos multi-party telephones according to an embodiment of the invention.With reference to 5 institute of figure
Show, the video reception part of the VoLTE video multi-party telephones of the present embodiment, including processing unit 501, receiving unit 502, decoding
Device 503, display unit 504 and transmitting element 505.Processing unit 501 is whole according to other calls to participating in video multi-party call
The region configuration-direct of the video image at end generates and selects signaling for the video resolution of other call terminals.Transmitting element
Send video resolution selection signaling.Receiving unit 502 receives the video image of other call terminals.The decoding of decoder 503 regards
Frequency image.Display unit 504 shows video image.
Here, region configuration-direct is the instruction to a certain video image to be configured to the region of a certain size.It such as will
Video image from first other call terminals is configured to large scale region, will come from second, third ... other call eventually
The video image at end is configured to small size region.Region configuration-direct can first by be used for show this call terminal preset or
Spontaneous generation.Importantly, region configuration-direct can be generated according to the handover operation of user.For example, Fig. 7, Fig. 8 are
The various dispaly states of call terminal according to an embodiment of the invention.Under normal conditions, the higher occupancy of video image resolution ratio
Display area it is bigger, but mobile phone screen size is limited, can not show multiple full-scale video images simultaneously.Cause
In folk prescription visual telephone, distal view seems to be shown with big region for this, and to ensure image definition, and local image is with zonule
Mode is shown.Equally in multi-party call, screen layout is compacter, and it is that big region is shown that can only have a side, remaining side is small
Region is shown.Such as in the figure 7, the local image of user A is shown with zonule, and a remote subscriber is shown with big domain mode
(being B in figure), remaining user are equally that zonule mode is shown (being C, D, E in figure).In communication process, user A can be cut
Change the content in big region, you can which remote subscriber is shown with big region with dynamic select.With reference to reference to shown in figure 7, Fig. 8, use
Video image from user B is configured to large scale region by family A sometimes, and by this user A, other users C, D, E
Video image be configured to small size region；And at other, user is switched to the video image from call terminal D
Large scale region is configured to, and the video image of this user A, other users B, C, E are configured to small size region.It is cut according to this
Operation is changed, call terminal generating region configuration-direct where user A, and video resolution selection signaling is further generated accordingly,
To be sent to multimedia server.
It returns to shown in Fig. 5, decoder 503 needs second by the first video image of first resolution and second resolution
Video image decoding.Assuming that 5 side's calls are carried out, and still using VGA forms and QVGA forms as the video image of Resolutions
Exemplified by, downlink one, which is met together, for each call terminal receives 3 QVGA video flowings (zonule) and a VGA video flowing
(big region is made of QVGA/VGA residual errors).Decoding for QVGA video flowings need to only receive in RTP, obtain QVGA after decoding
Format video data, then QVGA data are decoded, then show image (zonule).
It can also be such for the decoding of VGA video flowings.But, for the coding mode of preferred embodiment shown in Fig. 4, need
The decoder architecture shown in Fig. 6 is used, including the first decoding unit 601, up-sampling unit 602,603 and of the second decoding unit
Image composing unit 604.RTP obtains 2 road video images after receiving parsing.First video image (be, for example, QVGA forms) is the
One decoding unit 601 decodes, and is then up-sampled in up-sampling unit 602, is restored to second resolution (such as VGA lattice
Formula).In addition, residual plot picture value (such as VGA forms) is decoded in the second decoding unit 603.It then will in image composing unit 604
Two-way VGA format-patterns are added, and synthesize complete VGA images.
Call terminal
It is appreciated that a complete call terminal for being used for VoLTE video multi-party call, sends including above-mentioned video
Part and video reception part, composition include：Image capture device, encoder, transmitting element, processing unit, receiving unit,
Decoder and display unit.Image capture device gathers raw video image.Encoder is encoded according to raw video image and generated
First video image of first resolution and the second video image of second resolution, first resolution are less than second resolution.
Processing unit according to participate in video multi-party call other call terminals video image region configuration-direct, generate for
The video resolution selection signaling of other call terminals.Transmitting element send the first video image and the second video image and
Video resolution selects signaling.Receiving unit receives the video image of other call terminals.Decoder decoding video images.It is aobvious
Show that unit shows video image.
When the region configuration-direct of call terminal configures the video image of other a certain call terminals in the first ruler
During very little region, processing unit generates the video resolution selection signaling for indicating the first resolution；When the region of call terminal
Configuration-direct configures the video image of other a certain call terminals in the second size area, and processing unit generates instruction second
The video resolution selection signaling of resolution ratio, the second size area are more than first size region.
When the region configuration-direct of call terminal configures the video image of other a certain call terminals in the first ruler
During very little region, first size region is shown in after decoder decoding video images；When video terminal region configuration-direct by certain
The video images of one other call terminals is configured in the second size area, decoding unit by the encoded images residual values with
The second size area is shown in after first video image decoding.Region configuration-direct be according to the handover operation of user and/
Or predeterminable area configuration generates.
The other details of call terminal can refer to description above, not reinflated herein.
The flow chart of data processing that part is sent and received by above video realizes that 5 sides converse, and call terminal just can
Realize the image display mode of 1 road VGA and 3 road QVGA.Wherein up-sampling and down-sampling can be selected according to system processing power
Appropriate Image Zooming Algorithm, it is only necessary to ensure that video sending end and video receiver select same a set of algorithm.
For uplink transmitting portion, QVGA code checks itself are relatively low, and in the high frequency residual error data of another way VGA forms
Low frequency part energy is relatively low, and for data than sparse, the code check after coding is also lower than normal VGA images many.So in encoder
In the case of efficiency is fixed, code check and the separately encoded image bases of VGA all the way that QVGA and residual error VGA two-path video data add up
This almost, need not additionally increase upstream bandwidth.In addition, image scaling can be completed by graphics processor (GPU), it is left 1
Road VGA is encoded and 1 road QVGA encodes (QVGA encoding overheads are relatively low), and too big burden will not be caused to system.For downlink reception
For part, the independent QVGA data of 1 road QVGA/VGA residual errors and 3 roads are received in total, it is bigger than single-party call downlink bandwidth demand,
But since QVGA code checks itself are relatively low, so overall bandwidth increases seldom.And it needs to realize 4 road QVGA (quite in decoding process
In the load of the normal VGA image decodings in 1 road) and 1 road VGA decoding residual datas, it is actual since residual image data is than sparse
Decoding load can be less than the decoding load of normal VGA images.
5 side's video callings are realized according to this programme, and the bandwidth of ascender is close with single-party call, it is necessary to increase all the way
The expense of QVGA codings；Descender needs to increase by 3 road QVGA data bandwidths (600kbps or so), it is necessary to which to increase VGA all the way residual
The decoded expense of difference data.It is compared with single-party call, it is left that 30% is increased about to terminal wireless bandwidth aggregate demand under 5 sides call
The right side, codec total load increase about 25% or so；And there is no demand to network side, as long as forwarding data.Total comes
It says and can be achieved under existing hardware environment, it need not significantly upgrading terminals or the processing capacity of network.
Processing system for video example
By taking 5 side's call scheme of a VOLTE video according to embodiments of the present invention as an example, Fig. 9 is video processing system
System example, the wherein internal structure of terminal B, C, D, E are identical with terminal A.Since this example relates generally to video processing part, eventually
It is omitted in the parts figures such as wireless interface and access net between end and network.
The structure according to Fig. 9, by taking terminal A as an example, the substantially flow of 5 side's video callings is as follows：
1) video phone call is initiated by SIP signalings, terminal B, C, D, E are added in conference telephone successively, simultaneously
Current display mode (i.e. which user needs big region to show) is reported server by terminal A.
2) codec is started, local terminal acquisition image is encoded into QVGA/VGA residual video code streams, is sent out after the big bags of RTP
It send to network.
3) multimedia server of network side receives the upstream data that each terminal is sent, wherein terminal B, C, D, E uplinks
QVGA video sections in data are directly forwarded to terminal A.The display pattern set according further to terminal A is (assuming that terminal B needs
Big region is shown), the VGA residual videos in terminal B upstream datas are transmitted to terminal A.
4) terminal A first passes through RTP parsings after receiving downlink data, then obtains 4 road downlink video code streams.Wherein terminal B
Corresponding code stream includes QVGA/VGA residual error two parts, and the image of VGA resolution can be synthesized after decoding, is shown for big region
Show.The corresponding code streams of remaining terminal C, D, E only comprising QVGA video code flows, are shown after decoding for zonule.
5) if big region is shown that user is switched to terminal C by terminal A, server is signaled by SIP, then
Server stops forwarding the VGA residual error datas of terminal B, starts simultaneously at the VGA residual error datas of terminal C being transmitted to terminal A, so
Terminal A can be obtained by the VGA resolution image of terminal C.
The above-mentioned processing system for video and method of the present invention introduces the coding mode of multiresolution, is not increasing hardware money
Multi-channel video effect is realized in the case of source, compared to being had the advantage that for currently existing scheme：
First, radio bearer bandwidth need not be significantly increased, the upstream and downstream bandwidth of each terminal compares phase with single-party call
It is poor little, multi-channel video transmission is can be achieved under existing wireless environment.
Second, terminal processes load will not be rolled up, overall video treating capacity is close with single-party call, will not be apparent
Increase the pressure to system and Video Codec.
3rd, low to core net requirement, core net only needs to carry out data forwarding, and video data need not be turned
Code, need not largely upgrade network.
4th, the video speech quality of high definition is kept, video definition will not be reduced.
Although the present invention is described with reference to current specific embodiment, those of ordinary skill in the art
It should be appreciated that above embodiment is intended merely to illustrate the present invention, can also make in the case of without departing from spirit of the invention
Go out various equivalent change or replacement, therefore, as long as variation, change in the spirit of the present invention to above-described embodiment
Type will all fall in the range of following claims.
Claims (15)
1. a kind of method for processing video frequency of VoLTE videos multi-party telephone, comprises the following steps：
In one or more video sending ends：Raw video image is gathered, first is generated according to raw video image coding
First video image of resolution ratio and the second video image of second resolution, and send first video image and second and regard
Frequency image, the first resolution are less than the second resolution；
In multimedia server：First video image and the second video image of each video sending end are received, and receives one
A or multiple video receivers select signaling for the video resolution of each video sending end, are selected according to the video resolution
Corresponding video image is to each video receiver in each video sending end of signaling transmission；
In one or more video receivers, according to the region configuration-direct of the video image to each video sending end, generate pair
Signaling is selected in the video resolution of each video sending end, and the video of each video sending end is received from the multimedia server
Image decodes and shows the video image.
2. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that according to described
Raw video image coding generate first resolution the first video image and second resolution the second video image the step of
Including：
The raw video image is down-sampled to the first resolution, is then encoded into first video image, wherein
The raw video image is the second resolution；
The reconstruction data of first video image are obtained, and by the upsampling data of rebuilding to the second resolution；
The reconstruction data of second resolution and the raw video image are subtracted each other to obtain Image Residual value；
Described image residual values are encoded, wherein encoded images residual values form described second with first video image and regard
Frequency image.
3. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that regarded when described
Frequency division resolution selection signaling shows that the first video receiver needs the video figure of the first resolution from the first video sending end
During picture, first video image is sent to first video receiver from the multimedia server；When the video point
When resolution selection signaling shows that the first video receiver needs the video image of the second resolution from the first video sending end,
First video image is sent to second video receiver from the multimedia server.
4. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that regard when second
The region configuration-direct of frequency receiving terminal configures the video image of the second video sending end at first size region, described
Second video receiver generates the video resolution selection signaling for indicating the first resolution；When the institute of the second video receiver
It states region configuration-direct to configure the video image of the second video sending end in the second size area, second video reception
End generates the video resolution selection signaling for indicating the second resolution, and second size area is more than the first size
Region.
5. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that regard when second
The region configuration-direct of frequency receiving terminal configures the video image of the second video sending end at first size region, described
Second video receiver receives first video image, and the first size region is shown in after decoding；When the second video connects
The region configuration-direct of receiving end configures the video image of the second video sending end in the second size area, and described second
Second video image described in video receiver is shown in second size area after decoding.
6. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that be additionally included in
One or more of video receivers generate the region configuration-direct according to the handover operation of user.
7. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that be additionally included in
One or more of video receivers generate the region configuration-direct according to predeterminable area configuration.
8. the method for processing video frequency of VoLTE videos multi-party telephone according to claim 1, which is characterized in that the video
Transmitting terminal and the video receiver are integrated in same call terminal.
9. a kind of processing system for video of VoLTE videos multi-party telephone, including：
For gathering raw video image, the is generated according to raw video image coding for one or more video sending ends
First video image of one resolution ratio and the second video image of second resolution, and send first video image and second
Video image, the first resolution are less than the second resolution；
Multimedia server for receiving first video image of each video sending end and the second video image, and receives
One or more video receivers select signaling for the video resolution of each video sending end, are selected according to the video resolution
It selects signaling and sends in each video sending end corresponding video image to each video receiver；
One or more video receivers for the region configuration-direct according to the video image to each video sending end, generate
Signaling is selected for the video resolution of each video sending end, and regarding for each video sending end is received from the multimedia server
Frequency image decodes and shows the video image.
10. a kind of method for processing video frequency of VoLTE videos multi-party telephone, comprises the following steps：
When call terminal is as video sending end, raw video image is gathered, is encoded and generated according to the raw video image
First video image of first resolution and the second video image of second resolution, and send first video image and the
Two video images, the first resolution are less than the second resolution；
When call terminal is as video receiver, the video image of each video sending end, decoding are received from multimedia server
And show the video image, and according to the region configuration-direct of the video image to each video sending end, generate for respectively regarding
The video resolution selection signaling for the sending end that takes place frequently.
11. a kind of call terminal for VoLTE video multi-party call, including：
Image capture device gathers raw video image；
Encoder encodes first video image and second resolution for generating first resolution according to the raw video image
Second video image, the first resolution are less than the second resolution；
Processing unit, according to the region configuration-direct of the video image of other call terminals to participating in video multi-party call, production
The raw video resolution for other call terminals selects signaling；
Transmitting element sends first video image and the second video image and video resolution selection signaling；
Receiving unit receives the video image of other call terminals；
Decoder decodes the video image；
Display unit shows the video image.
12. the call terminal according to claim 11 for VoLTE video multi-party call, which is characterized in that the volume
Code device includes：
The raw video image is down-sampled to the first resolution by downsampling unit, wherein the raw video image
For the second resolution；
First coding unit, by down-sampling rear video data encoding into first video image；
Up-sampling unit, obtains the reconstruction data of first video image, and by the reconstruction upsampling data to described the
Two resolution ratio；
The reconstruction data of second resolution and the raw video image are subtracted each other to obtain Image Residual value by residual computations unit；
Second coding unit encodes described image residual values, wherein encoded images residual values and first video image
Form second video image.
13. the call terminal according to claim 11 for VoLTE video multi-party call, which is characterized in that when described
The region configuration-direct of call terminal configures the video image of other a certain call terminals at first size region, institute
It states processing unit and generates the video resolution selection signaling for indicating the first resolution；When the region of the call terminal
Configuration-direct configures the video image of other a certain call terminals in the second size area, and the processing unit generates instruction
The video resolution selection signaling of the second resolution, second size area are more than the first size region.
14. the call terminal according to claim 11 for VoLTE video multi-party call, which is characterized in that when described
The region configuration-direct of call terminal configures the video image of other a certain call terminals at first size region, institute
The first size region is shown in after stating decoder decoding video images；When the region configuration-direct of the video terminal
The video images of other a certain call terminals is configured in the second size area, the decoder is by second video image
Second size area is shown in after decoding.
15. the call terminal according to claim 1 for VoLTE video multi-party call, which is characterized in that the region
Configuration-direct is to be configured to generate according to the handover operation and/or predeterminable area of user.
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