CN101998102A - Method for controlling video quality of mobile video telephone and mobile video telephone - Google Patents
Method for controlling video quality of mobile video telephone and mobile video telephone Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/44209—Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4425—Monitoring of client processing errors or hardware failure
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Abstract
The invention provides a method for controlling video quality of a mobile video telephone and the mobile video telephone. The method comprises the following steps that: a first video telephone receives first video data of a second video telephone; the first video telephone acquires and transmits feedback information to the second video telephone; and the first video telephone receives second video data from the second video telephone, wherein the second video data is video data which is acquired by adjusting to-be-transmitted video data by the second video telephone according to the feedback information. By applying the technology provided by the embodiment of the invention, a user of the video telephone can select different video quality to transmit the feedback information corresponding to the video quality of a receiving end to a transmitting end according to the demand of the user, and the video data is adjusted by the transmitting end, so that the user of the video telephone can control the video quality of the received video data by the receiving end.
Description
Technical field
The present invention relates to mobile communication technology, be meant a kind of method and mobile video telephone of controlling the mobile video telephone video quality especially.
Background technology
Development along with mobile communication technology, mobile video telephone begins to be used on a large scale, it is a kind of multimedia communication instrument that integrates image, speech, can help the aspectant real-time communication of people, realizes when people converse not only hearing its, but also the hope of seeing its people.
Technical standard for further standard video telephone, third generation partner program (3GPP, ThirdGeneration Partnership Project) proposed the 3G-324M protocol suite, H.223 this protocol suite comprises multiplex protocol, H.245 session control protocol, video encoding agreement etc.Wherein, H.245 session control protocol is supported user prompt symbol (UII, User Input Indication) transmission, it is playing the part of important role in all application services of user interactions, for the video messaging business, typical UII uses user preference selection, message recording and inquiry and conventional functions such as mailbox management generally is provided.H.245, reliable signaling protocol is provided, can guarantees that various message can be by reliable transmission.
Mobile telecommunication channel is that a kind of error rate is than higher transmission environment, and video communication is very responsive to the error rate, and the quality of video telephone often can't be guaranteed, particularly under the situation of higher bit stream, it is many that receiving end tends to mosaic to occur, and video has situations such as time-delay.
The inventor is in realizing process of the present invention, and find that there are the following problems at least in the prior art: in the video telephony applications process in the past, the user can only pass through the passive reception data of receiving end, can't claim and controls video quality.
Summary of the invention
The purpose of this invention is to provide a kind of method and mobile video telephone of controlling the mobile video telephone video quality, receiving end is controlled the video quality of the video data that received.
A kind of method of controlling the mobile video telephone video quality comprises: first video telephone receives first video data of second video telephone; First video telephone obtains and sends a feedback information to described second video telephone; First video telephone receives second video data from described second video telephone, and described second video data is the video data that described second video telephone obtains adjusting of video data to be sent according to described feedback information.
A kind of mobile video telephone comprises: acquiring unit is used to obtain and sends a feedback information to one second video telephone; Transmit-Receive Unit is used to receive first video data from second video telephone; And receiving second video data from described second video telephone, described second video data is the video data that described second video telephone obtains adjusting of video data to be sent according to described feedback information.
Use the technology that present embodiment provides, the user of video telephone is according to the needs of oneself, select different video qualities, the feedback information of the video quality correspondence of receiving end is sent to transmitting terminal, by transmitting terminal video data is adjusted, like this then user video telephone can make receiving terminal that the video quality of the video data that received is controlled.
Description of drawings
Fig. 1 is the method flow schematic diagram of embodiment of the invention control mobile video telephone video quality;
The method flow schematic diagram that Fig. 2 controls smooth degree and quality for the embodiment of the invention;
Fig. 3 is the method flow schematic diagram of the embodiment of the invention based on the TD-SCDMA system;
Fig. 4 is an embodiment of the invention mobile video telephone structural representation one;
Fig. 5 is an embodiment of the invention mobile video telephone structural representation two.
Embodiment
For making purpose of the present invention, technical characterictic and implementation result clearer, below in conjunction with the accompanying drawings and the specific embodiments technical scheme of the present invention is described in detail.Among the embodiment provided by the invention, allow the video telephone user error rate condition feedback of receiving end receiving video data can be arrived transmitting terminal, video encoding quality is adjusted.Wherein, the error rate refers to the error rate in transfer of data, and promptly the ratio of the code element of the code element of error of transmission and all transmission in transmission is major criterions weighing computer network communication quality quality.
A kind of method of controlling the video quality of mobile video telephone, first video telephone is a receiving end, as shown in Figure 1, comprising:
Use the technology that present embodiment provides, the user of video telephone is according to the needs of oneself, select different demand options, the demand option of receiving end is fed back to transmitting terminal as feedback information, by transmitting terminal video coding is adjusted, like this then user video telephone can make receiving end that the video data that is received is controlled.
First video data that first video telephone receives second video telephone also comprises before:
Set step, first video telephone is set different demand options, and the demand option is corresponding with the different demands to video quality; For each described demand option, dispose the error rate of different stage of this demand option correspondence and/or the definition of different stage.
First video telephone obtains and sends a feedback information to described second video telephone, is specially:
Detect step, described first video telephone is selected at least one demand option in different described demand options; Carry out relevant detection or directly obtain indication according to described at least one demand option, obtain feedback information from the user.
Second video telephone is adjusted according to described feedback information, is specially: the coding to described video data is adjusted.
Wherein, feedback information is in order to identify the error rate that first video telephone is determined according to the current video data that receives; When the described error rate surpassed predetermined threshold value, second compression of video data ratio was higher than and equals first compression of video data ratio; When the described error rate was lower than predetermined threshold value, second compression of video data ratio was lower than and equals first compression of video data ratio.
What specifically, feedback information comprised is the error rate grade of the described error rate; The described error rate according to the difference of numerical values recited respectively with different error rate grade between corresponding one by one; Also comprise described first video telephone of sign in the feedback information at the determined articulation index of the current video data that receives; When described articulation index was raising, described second compression of video data ratio was lower than described first compression of video data ratio.
Be to help the technical staff further to understand design concept of the present invention, as shown in Figure 2, the method that provides a kind of smooth degree that video telephone is looked and quality to control comprises:
Step 201 is set different demand options, and the demand option is corresponding to the different demands of the video quality of communication with the user; To each demand option, when the definition of error rate scope that disposes the corresponding different stage of this demand option and/or different stage, specifically comprise: the scope that configures error rate grades at different levels, and between video telephone, carry out the agreement of encoding and decoding cipher rule, wherein, generate feedback information according to the encoding and decoding cipher rule.
Being without loss of generality, is that example is described with the communication between two video telephone only in the present embodiment.
Step 202 is set up link between two video telephone, both sides can normally carry out video call.
Step 203 judges that the demand option that the receiving end user selects is " smooth preferential " or " quality is preferential ", if selection is smooth preferential, changes step 204, otherwise changes step 207.
Step 204 starts error rate listening functions, the periodic statistics of the beginning error rate.
Wherein, error rate listening functions is realized by concrete functional unit block, is a kind of of measuring ability.
Step 205 according to the error rate scope at error rate place, obtains current error rate grade and is included in the feedback information.
Step 206 with error rate grade, is encoded according to the cryptography rule of agreement in the step 201, sends to the UE that makes a start as feedback information.Feedback information herein is specially a password.
Change step 208.
Step 207 is closed error rate listening functions, selects the information of " quality is preferential " to carry out cryptography the user, feeds back to the UE that makes a start as feedback information.Feedback information herein is specially a password.
Step 208, the UE that makes a start receives password, with its set by step in 201 the cryptography rule of agreement decode, after the instruction that draws " quality is preferential ", by the optimum quality coding to sending behind the video data encoding.
The UE that makes a start receives feedback information, with its set by step in 201 the cryptography rule of agreement decode, be not the instruction of " quality is preferential " when what draw, but during the error rate grade of receiving end UE, extract error rate grade.Make a start the coding control module of UE according to the error rate grade that obtains, adjust coding quality.
In the present embodiment, only between two video telephone, converse, the demand option then be limited to smooth preferential and quality preferential between, obtain feedback information by detection and send to the UE that makes a start, by the UE that makes a start according to feedback information adjustment mail to the video data of receiving end, make the video telephone user can select required video quality voluntarily, realized the control of receiving end the quality of video data.
Wherein, in the step 201, need the error rate of different stage of configuration needs option correspondence and/or the definition of different stage.Specifically can be as shown in table 1, dispose level Four error rate grade, and the encoding and decoding cipher rule of feedback information is arranged.
Table 1 level Four error rate grade
Under the poor situation of network environment, use " smooth preferential ", along with raising step by step from left to right of the error rate, it is smooth that video pictures still can keep, and this is because under the poor situation of network environment, the error rate is higher, use " smooth preferential " this moment, then strengthen the video compression ratio, helped to alleviate network pressure, reduced the error rate, though it is fuzzyyer that the picture of receiving end can become, picture is more smooth.
The data that above-mentioned configuration generates need be stored in the memory of video telephone in advance.
For definition, can adopt the corresponding relation that is similar in the table 1, but among the present invention for convenience of description, only set two kinds of operations for definition: improve and reduce.
Because 3G technology is current a kind of communication technology for user's selection, and more and more the user tends to select to have the terminal of 3G function, so proposes a kind of specific embodiments, and the present invention is described in further details; Between video telephone A and video telephone B, converse, as shown in Figure 3, comprising:
Step 301 is set up link by time division SCDMA (TD-SCDMA) network between video telephone A and the video telephone B.
Simultaneously, set different demand options, described demand option is corresponding to the different demands of conversation with the user; To each demand option, when the definition of error rate scope that disposes the corresponding different stage of this demand option and/or different stage.
Specifically comprise, as shown in table 1, configuration level Four error rate scope, the data that configuration generates need be stored in the memory of video telephone in advance; Between video telephone, carry out the agreement of encoding and decoding cipher rule.
Step 302, both sides adjust the quality of video data according to default setting.
After link was set up, both sides can see the other side's video and can converse.
Step 303, video telephone B judges the demand option that the user selects;
Video telephone B opens menu, and option " video quality " is arranged in the menu, and after choosing, the menu of ejection has alternate item " smooth preferential " and " quality is preferential ";
Select " smooth preferential " option if judge the user, change step 304; Select " quality is preferential " if judge the user, change step 309.
Step 304, video telephone B start detection function specifically can be that an error rate is intercepted module and realized this measuring ability;
In the testing process, be the cycle with 200 milliseconds (ms), beginning is added up the error rate in the one-period according to the detected parameters of channel code.
Owing to be the TD-SCDMA wireless network, in TD-SCDMA, the elementary cell of exchanges data is transmission block (TB between medium access control (MAC) layer and the physical layer, Transport Block), physical layer can add CRC check information (Cyclicl Redundncy Check) for each transmission block before sending these TB.Therefore, video telephone B can draw video telephone A according to CRC information whether pass each TB come wrong.By collecting the CRC error message in a period of time, can draw the current network quality condition.
Step 305, video telephone B compares according to the error rate scopes at different levels (as table 1) as storing in the error rate of detected parameters and the phone that obtain, the grade of the error rate that the residing scope of the error rate is corresponding current.
Step 306, video telephone B is error rate grade, and encoding according to the cryptography rule of being stored obtains password, and this password is feedback information, sends described feedback information to video telephone A.
Specifically can become the Dual Tone Multifrequency pulse signal with described password is corresponding, send to video telephone A by agreement H.245.
Step 307, video telephone A receives dtmf signal, and with its set by step in 301 the cryptography rule of agreement decode, obtain the error rate of video telephone B.
Step 308, the unit module of the correspondence of video telephone A, coding control module for example, according to the error rate of feedback, corresponding adjustment coding quality; For example strengthen or reduce the video compression ratio, elongate or the I of compressed video data, P frame period etc.
The concrete process of selecting to strengthen or reduce the video compression ratio can form a corresponding relation with the error rate grade described in the table 1, for example, if the ratio of the video compression during Perfect is 3, compression ratio during Good is 6, and the compression ratio during Normal is 10, and the compression ratio during Bad is 16.Video compression is bigger than more, and then the quality of image is poor more, but the data flow of image is more little, can reduce the network pressure of receiving end, helps to make video pictures more smooth.
Change step 313.
Step 309 because the video telephone party B-subscriber has selected " quality is preferential ", does not therefore detect the error rate.
Step 310 is translated into password " 000 " with " quality is preferential ", and is the DTMF pulse with password setting, sends to video telephone A.
Step 311, after video telephone A received password " 000 ", with its decoding, the information that obtains was to use the coding strategy of " Prefect ".
Step 312 by coding control module, is adjusted into 3 with the video compression ratio, with video according to the best quality transmission of encoding.
Step 313 finishes current adjustment to video data.
Step 314 when the user is hung up video telephone, is preserved Set For Current, end session.
With a kind of method of controlling the mobile video telephone video quality accordingly, as shown in Figure 4, present embodiment provides a kind of mobile video telephone, comprising:
Acquiring unit 401 is used to obtain and sends a feedback information to one second video telephone;
Transmit-Receive Unit 402 is used to receive first video data from second video telephone;
And receiving second video data from described second video telephone, described second video data is the video data that described second video telephone obtains adjusting of video data to be sent according to described feedback information.
Use the technology that present embodiment provides, in the calling course of video telephone, the user of receiving end selects the needs of video according to own, the feedback information of receiving end is sent to transmitting terminal, by transmitting terminal video encoding quality is adjusted, the user of like this then receiving end can control the quality of the video data that received.
For helping the technology that the technical staff understands to be provided, in the present embodiment, mobile video telephone is optimized, as shown in Figure 5, comprising:
Demand option unit is used to be provided with described feedback information in order to identify the error rate that described first video telephone is determined according to the current video data that receives; Described feedback information is set in order to identify described first video telephone at the determined articulation index of the current video data that receives;
Coding control first module is connected with Transmit-Receive Unit 402, is used for described second compression of video data ratio being set being higher than described first compression of video data ratio when the described error rate surpasses predetermined threshold value.
Coding control second module is connected with Transmit-Receive Unit 402, is used for when the described error rate is lower than predetermined threshold value, described second compression of video data ratio is set is lower than described first compression of video data ratio.
Setup unit, be used to set the described error rate according to the difference of numerical values recited respectively with different error rate grade between corresponding one by one.
User selection unit is used to the user that different demand options is provided, and comprises at least: " smooth preferential " and " quality is preferential ".
Definition module (identifying among the figure) is connected with Transmit-Receive Unit 402, is used for described second compression of video data ratio being set being lower than described first compression of video data ratio when described articulation index is raising.
Described acquiring unit 401 comprises that the error rate intercepts module and error rate judging module, wherein:
The error rate is intercepted module, be used for when described demand option when being smooth preferential, starting error rate listening functions detects, in the one-period, CRC check information the transmission block TB from physical layer transmission to the MAC layer is tested, and the number of times of makeing mistakes of collecting this CRC check information is as described detected parameters.
And,
Error rate judging module is intercepted module with the error rate, Transmit-Receive Unit 402 is connected, be used for the error rate according to the difference of numerical values recited respectively with different error rate grade between corresponding one by one; Described error rate grade sends to Transmit-Receive Unit 402 as feedback information.
Transmit-Receive Unit 402 also is connected with an error rate decoder module (not identifying among the figure), described error rate decoder module, be used for after receiving described feedback information, to the decoding of described feedback information, draw the error rate of described different stage of detected parameters correspondence of receiving end UE and/or the definition of different stage.
Embodiments of the invention have following beneficial effect, can make the receiving end user control the quality of the video data of being received, under the poor situation of network environment, the user selects the video quality of being satisfied with voluntarily, and the error rate condition feedback that receiving end can be received by transmitting terminal adjustment video encoding quality, can reduce the mosaic in the video to transmitting terminal, make in the whole video communication process, remain clear and smooth.Under the reasonable situation of network environment, can provide video pictures more clearly.Break away from the passive situation of simple receiving video data, strengthened user experience.
Should be noted that above embodiment is only unrestricted in order to technical scheme of the present invention to be described, all parameter values can be according to the actual conditions adjustment, and in this rights protection scope.Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention, and do not break away from the spiritual scope of technical solution of the present invention, and it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. a method of controlling the mobile video telephone video quality is characterized in that, comprising:
First video telephone receives first video data of second video telephone;
First video telephone obtains and sends a feedback information to described second video telephone;
First video telephone receives second video data from described second video telephone, and described second video data is the video data that described second video telephone obtains adjusting of video data to be sent according to described feedback information.
2. method according to claim 1 is characterized in that, described feedback information is in order to identify the error rate that described first video telephone is determined according to the current video data that receives;
When the described error rate surpassed predetermined threshold value, described second compression of video data ratio was higher than described first compression of video data ratio.
3. method according to claim 2 is characterized in that, when the described error rate was lower than predetermined threshold value, described second compression of video data ratio was lower than described first compression of video data ratio.
4. method according to claim 2 is characterized in that,
Feedback information comprises the error rate grade of the described error rate;
The described error rate according to the difference of numerical values recited respectively with different error rate grade between corresponding one by one.
5. method according to claim 1 is characterized in that, described feedback information is also in order to identify described first video telephone at the determined articulation index of the current video data that receives;
When described articulation index was raising, described second compression of video data ratio was lower than described first compression of video data ratio.
6. a mobile video telephone is characterized in that, comprising:
Acquiring unit is used to obtain and sends a feedback information to one second video telephone;
Transmit-Receive Unit is used to receive first video data from second video telephone;
And receiving second video data from described second video telephone, described second video data is the video data that described second video telephone obtains adjusting of video data to be sent according to described feedback information.
7. mobile video telephone according to claim 6 is characterized in that, also comprises:
Demand option unit is used to be provided with described feedback information in order to identify the error rate that described first video telephone is determined according to the current video data that receives; Described feedback information is set in order to identify described first video telephone at the determined articulation index of the current video data that receives;
Coding control first module is used for described second compression of video data ratio being set being higher than described first compression of video data ratio when the described error rate surpasses predetermined threshold value.
8. mobile video telephone according to claim 7 is characterized in that, also comprises:
Coding control second module is used for when the described error rate is lower than predetermined threshold value, described second compression of video data ratio is set is lower than described first compression of video data ratio.
9. mobile video telephone according to claim 7 is characterized in that, also comprises:
Setup unit, be used to set the described error rate according to the difference of numerical values recited respectively with different error rate grade between corresponding one by one.
10. mobile video telephone according to claim 7 is characterized in that, also comprises:
The definition module is used for described second compression of video data ratio being set being lower than described first compression of video data ratio when described articulation index is raising.
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| CN2009100917236A CN101998102A (en) | 2009-08-24 | 2009-08-24 | Method for controlling video quality of mobile video telephone and mobile video telephone |
| PCT/CN2010/071894 WO2011022974A1 (en) | 2009-08-24 | 2010-04-19 | Method for controlling video quality of mobile video phone and mobile video phone |
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| CN2009100917236A CN101998102A (en) | 2009-08-24 | 2009-08-24 | Method for controlling video quality of mobile video telephone and mobile video telephone |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103516477A (en) * | 2012-06-29 | 2014-01-15 | 华为技术有限公司 | Data transmission method and device |
| WO2018072716A1 (en) * | 2016-10-20 | 2018-04-26 | 西安中兴新软件有限责任公司 | Image processing method and device |
| CN109699052A (en) * | 2017-10-24 | 2019-04-30 | 中国移动通信有限公司研究院 | A kind of VoLTE video speech quality method of adjustment, device, system and medium |
| CN111526163A (en) * | 2020-07-03 | 2020-08-11 | 翱捷科技(上海)有限公司 | ViLTE video call quality control system and method |
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| CN103581767A (en) * | 2012-07-24 | 2014-02-12 | 鸿富锦精密工业（深圳）有限公司 | Regulating system, terminal and method for video quality |
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| US6384862B1 (en) * | 1997-03-12 | 2002-05-07 | Telefoaktiebolaget L M Ericsson | Imaging system and method for interactive control of image quality |
| CN101272217B (en) * | 2007-03-23 | 2011-04-13 | 联芯科技有限公司 | Method and device for processing audio/video signal |
| CN101309388A (en) * | 2007-05-18 | 2008-11-19 | 希姆通信息技术（上海）有限公司 | Control method for call image quality of video telephone and mobile phone adopting the method |
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- 2009-08-24 CN CN2009100917236A patent/CN101998102A/en active Pending
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2010
- 2010-04-19 WO PCT/CN2010/071894 patent/WO2011022974A1/en active Application Filing
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103516477A (en) * | 2012-06-29 | 2014-01-15 | 华为技术有限公司 | Data transmission method and device |
| WO2018072716A1 (en) * | 2016-10-20 | 2018-04-26 | 西安中兴新软件有限责任公司 | Image processing method and device |
| CN107968927A (en) * | 2016-10-20 | 2018-04-27 | 中兴通讯股份有限公司 | Image processing method and device |
| CN109699052A (en) * | 2017-10-24 | 2019-04-30 | 中国移动通信有限公司研究院 | A kind of VoLTE video speech quality method of adjustment, device, system and medium |
| CN111526163A (en) * | 2020-07-03 | 2020-08-11 | 翱捷科技(上海)有限公司 | ViLTE video call quality control system and method |
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| WO2011022974A1 (en) | 2011-03-03 |
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