CN103096084B - Method, the Apparatus and system of code check Automatic adjusument in a kind of wireless transmission - Google Patents
Method, the Apparatus and system of code check Automatic adjusument in a kind of wireless transmission Download PDFInfo
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Abstract
The invention discloses the method for code check Automatic adjusument in a kind of wireless transmission, for video code rate Automatic adjusument, the method comprises: according to the video features type parameter of video source data, obtains image complexity parameter; Receive the wireless channel transmission quality information that receiving terminal sends; According to wireless channel transmission quality information, obtain wireless transmission index parameter; According to wireless transmission index parameter, obtain target bit rate parameter; According to image complexity parameter and target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter; Image output frame rate parameter being sent to video encoding module, to make video encoding module when carrying out Video coding to video source data, utilizing the bit rate output of image output frame rate parameter to coding standard video data to regulate.The invention also discloses the Apparatus and system of code check Automatic adjusument in a kind of wireless transmission.
Description
Technical field
The present invention relates to the communications field, be specifically related to the method for code check Automatic adjusument in a kind of wireless transmission, Apparatus and system.
Background technology
Along with the high speed development of video coding technique and the progress of broadband digital transmission technology, moving image transmitting defeated in public safety, radio and television, forestry, fire-fighting, speedily carry out rescue work, mine, each field such as petrochemical industry obtain a wide range of applications.In video communication, due to the restriction of communication bandwidth, need to regulate video code rate, code check refers to the stream rate of Video coding.
In the prior art, some rate control algorithms are proposed to realize the Stream Media Application under different bandwidth environment, wherein representational algorithm has the TMN5 rate control algorithm of MPEG-2, the rate control algorithm of TMN8 H.263, the rate control algorithm etc. of VM8 and VM18 of MPEG-4.
But these code rate adjustment algorithm complexes are high, are mainly used in the wired channel environments that bandwidth fluctuation is less.Due to based on COFDM (Coded Orthogonal Frequency Division Multiplexing (COFDM), Coded Orthogonal FrequencyDivision Multiplexing) wireless signal-path band width of technology is by vision facilities high-speed mobile, long transmission distance, signal is weak, high mountain, building stops, bad weather, the impact of the various factorss such as ambient temperature can produce dynamic change, wireless channel is made to have low reliability, the features such as high latency and violent shake, when making that in prior art, code rate adjustment is applied in wireless channel environment, the continuity that real-time and the receiving terminal of transmission are play can not be guaranteed, end-to-end delay between transmitting terminal and receiving terminal increases, also may there is frame-skipping phenomenon, have a strong impact on the service quality of these application.Therefore, the code rate adjustment algorithm of prior art can not meet the network bandwidth and shake violent wireless network environment requirement, and then causes requirement to receive the larger problem of larger, the end-to-end image time delay of buffer memory.
Summary of the invention
In view of this, main purpose of the present invention is to provide method, the Apparatus and system of code check Automatic adjusument in a kind of wireless transmission, to solve the problem that in prior art, code rate adjustment algorithm is stablized channel bandwidth requirement, jitter immunity is not strong.
For solving the problem, technical scheme provided by the invention is as follows:
A method for code check Automatic adjusument in wireless transmission, described method comprises:
According to the video features type parameter of video source data, obtain image complexity parameter;
Receive the wireless channel transmission quality information that receiving terminal sends;
According to described wireless channel transmission quality information, obtain wireless transmission index parameter;
According to wireless transmission index parameter, obtain target bit rate parameter;
According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
Described image output frame rate parameter is sent to described video encoding module, to make video encoding module when carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
Accordingly, after acquisition wireless transmission index parameter, described method also comprises:
Judge whether described wireless transmission index parameter meets threshold value, if so, then code check Automatic adjusument terminates, if not, then continue to perform step according to wireless transmission index parameter, obtain target bit rate parameter, to step, described frame per second parameter is sent to described video encoding module.
Accordingly, the described video features type parameter according to video source data, obtains image complexity parameter, comprising:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, described image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
A method for code check Automatic adjusument in wireless transmission, described method comprises:
According to the video features type parameter of video source data, obtain image complexity parameter;
Video coding is carried out to described video source data, described digital of digital video data is converted to coding standard video data;
Described coding standard video data is modulated, described coding standard video data is converted to video high frequency radio signals;
Described video high frequency radio signals is carried out power amplification and launched;
Receive the wireless channel transmission quality information that receiving terminal sends;
According to described wireless channel transmission quality information, obtain wireless transmission index parameter;
According to wireless transmission index parameter, obtain target bit rate parameter;
According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
When carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
Accordingly, when described video source data is analog video data, described method also comprises:
Before Video coding is carried out to described video source data, A/D conversion is carried out to described video source data, described video source data is converted to digital of digital video data.
Accordingly, after acquisition wireless transmission index parameter, described method also comprises:
Judge whether described wireless transmission index parameter meets threshold value, if, then code check Automatic adjusument terminates, if not, then continue to perform step according to wireless transmission index parameter, when acquisition target bit rate parameter carries out Video coding to step to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
Accordingly, the described video features type parameter according to video source data, obtains image complexity parameter, comprising:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, described image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
A method for code check Automatic adjusument in wireless transmission, described method comprises:
Transmitting terminal, according to the video features type parameter of video source data, obtains image complexity parameter;
Described transmitting terminal carries out Video coding to described video source data, and described video source data is converted to coding standard video data; Described coding standard video data is modulated, described coding standard video data is converted to video high frequency radio signals; Described video high frequency radio signals is carried out power amplification and launched;
Receiving terminal receives described video high frequency radio signals, carries out demodulation to the described video high frequency radio signals received; According to the coding standard video data after demodulation, obtain wireless channel transmission quality information and send to described transmitting terminal;
Described transmitting terminal receives described wireless channel transmission quality information; According to described wireless channel transmission quality information, obtain wireless transmission index parameter; According to wireless transmission index parameter, obtain target bit rate parameter; According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter; When carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
A device for code check Automatic adjusument in wireless transmission, described device comprises:
First obtains unit, for the video features type parameter according to video source data, obtains image complexity parameter;
Receiving element, for receiving the wireless channel transmission quality information that receiving terminal sends;
Second obtains unit, for according to described wireless channel transmission quality information, obtains wireless transmission index parameter;
3rd obtains unit, for according to wireless transmission index parameter, obtains target bit rate parameter;
4th obtains unit, for according to described image complexity parameter and described target bit rate parameter, inquires about Rate Control empirical data table, obtains image output frame rate parameter;
Transmitting element, for described image output frame rate parameter is sent to described video encoding module, to make video encoding module when carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
Accordingly, described device also comprises:
Judging unit, for judging whether described wireless transmission index parameter meets threshold value.
A device for code check Automatic adjusument in wireless transmission, described device comprises:
Control module, video encoding module, modulation module, power amplifier module;
Described video encoding module, for carrying out Video coding to described video source data, is converted to coding standard video data by described digital of digital video data;
Described modulation module, for modulating described coding standard video data, is converted to video high frequency radio signals by described coding standard video data;
Described power amplifier module, for carrying out power amplification to described video high frequency radio signals and launch;
Described control unit is the device of code check Automatic adjusument in the first wireless transmission described.
Accordingly, described device also comprises:
A/D modular converter;
Described A/D modular converter, for when described video source data is analog video data, before carrying out Video coding to described video source data, carries out A/D conversion to described video source data, described video source data is converted to digital of digital video data.
A system for code check Automatic adjusument in wireless transmission, described system comprises:
Transmitting terminal and receiving terminal;
Described receiving terminal, for receiving the video high frequency radio signals that described transmitting terminal sends, to the described video high frequency radio signals demodulation received; According to the coding standard video data after demodulation, obtain wireless channel transmission quality information and send to described transmitting terminal;
Described transmitting terminal is the device of code check Automatic adjusument in described the second wireless transmission.
As can be seen here, the present invention has following beneficial effect:
The wireless transmission index of the present invention by reference to reflection wireless bandwidth situation, the image complexity parameter of reflection image complexity, dynamic adjustments video encoder module frame per second, and then realize regulating encoder bit rate in real time, the shake that the various factors that can automatically adapt to wireless signal-path band width causes, jitter immunity is strong, thus achieves transmitting terminal and receiving terminal transmission of video postpones little, that image is smooth effect.Meanwhile, inquiry Rate Control empirical data table obtains frame per second parameter, and code rate adjustment response is fast, and complexity is low.
Accompanying drawing explanation
Fig. 1 is the first flow chart of code check adaptive regulation method in wireless transmission of the present invention;
Fig. 2 is the second flow chart of code check adaptive regulation method in wireless transmission of the present invention;
Fig. 3 is the third flow chart of code check adaptive regulation method in wireless transmission of the present invention;
Fig. 4 is the structural representation of code check self-adaptive regulating in the first wireless transmission of the present invention;
Fig. 5 is the structural representation of code check self-adaptive regulating in the second wireless transmission of the present invention;
Fig. 6 is a kind of concrete structure schematic diagram of code check self-adaptive regulating in the second wireless transmission of the present invention;
Fig. 7 is the structural representation of code check self-adaption regulation system in wireless transmission of the present invention;
Fig. 8 is the principle schematic of code check self-adaption regulation system in wireless transmission of the present invention;
Fig. 9 is the application scenarios schematic diagram of code check self-adaption regulation system in wireless transmission of the present invention.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage become apparent more, are described in further detail the embodiment of the present invention below in conjunction with the drawings and specific embodiments.
The method of code check Automatic adjusument in a kind of wireless transmission provided by the invention, stablize for code rate adjustment algorithm channel bandwidth requirement in prior art, jitter immunity is not strong, and then cause the problem that end-to-end image time delay is larger, proposition utilizes video features type parameter to obtain image complexity parameter, in video source after the process such as Video coding send, receiving terminal feeds back wireless channel condition, according to image complexity and the target bit rate according to wireless channel condition acquisition, inquiry Rate Control empirical data table, obtain frame per second parameter, use the adjustment that this frame per second parameter can realize encoder bit rate, with the bandwidth making the code check transmitted can adapt to present channel, ensure good and stable receipt decoding play quality.
Based on above-mentioned thought, shown in Figure 1, in a kind of wireless transmission of the present invention, the method for code check Automatic adjusument, comprises the following steps, and the method can be performed by the control unit in video sending end:
Step 101: according to the video features type parameter of video source data, obtains image complexity parameter.
Video features type parameter refers to the feature of video source, such as video source belongs to CVBS SD composite video signal, or the SD vision signal of Y/C brightness and chrominance separation, or the vision signal of YPbPr brightness and aberration combination, or HDMI high-definition video signal, the standard of video source signal belongs to PAL or NTSC, the number of image frames size that video source is per second and frame per second, belongs to still interlacing scan etc. of lining by line scan.
For video coding technique, image complexity parameter is used to the index of the codec complexity evaluating video signal.Image complexity parameter can comprise the parameters such as picture size, image input frame rate and/or image motion severe degree, and when such as, when video source is high-definition signal, its image complexity can be standard definition signal than video source, its image complexity is high.
Concrete, can according to the video features type parameter of video source data, by query image complexity and video features type empirical data table, obtain image complexity parameter, image complexity parameter can comprise picture size, image input frame rate and/or image motion severe degree.This image complexity and video features type empirical data table by analyzing rear acquisition to different video image, and can be kept in the control module of video sending end.By the method obtaining image complexity of tabling look-up, there is feature fast and effectively.
Step 102: receive the wireless channel transmission quality information that receiving terminal sends.
Video encoding module in video sending end carries out Video coding to video source data, digital of digital video data is converted to coding standard video data; Modulation module is modulated coding standard video data, and coding standard video data is converted to video high frequency radio signals; Power amplifier module carries out power amplification to video high frequency radio signals and after transmitting, receiving terminal can feed back wireless channel transmission quality information.Concrete, if video source data is analog video data, also needs to change the A/D of video source data through A/D modular converter, video source data is changed to digital of digital video data, then starts the Video coding of video source data through video encoding module.
Video encoding module can select MPEG-2 video encoding module, MPEG-4 video encoding module or H.264 video encoding module.H.264 encoding due to the performance of its high-quality, is the optimal way carrying out Video coding in the present invention.H.264 encode primarily of infra-frame prediction, inter prediction (motion estimation and compensation), the integer transform of approximate DCT, the submodules such as quantification and entropy code are formed.
Modulation module can select COFDM modulation module, high frequency radio signals is modulated into by DVB-T transmission standard, COFDM modulation module is primarily of OFDM coded modulation (DVB-T adjuster), and RF DAC (radio frequency D/A converter), I/Q modulation waits submodule to form.
Receiving terminal receives video high frequency radio signals, to the video high frequency radio signals demodulation received, analyze the coding standard video data after demodulation, wireless channel transmission quality information can be obtained, such as data loss rate, the error rate etc., wireless channel transmission quality information is fed back to the control module in transmitting terminal by receiving terminal by feedback path.
Step 103: according to wireless channel transmission quality information, obtains wireless transmission index parameter.
According to the wireless channel transmission quality information of receiving terminal feedback, wireless transmission index parameter can be obtained, to obtain the adaptedness of current data bandwidth and the code check to transmit, if such as present channel bandwidth declines, data loss rate, the error rate can be caused to increase, at this moment illustrate that the too high needs of current code check regulate.
Step 104: according to wireless transmission index parameter, obtains target bit rate parameter.
Target bit rate parameter refers to the parameter weighing the code check size that present channel bandwidth can be transmitted.It can be wireless transmission index parameter (as the data loss rate) maximum transfer rate under user can accept situation in a period of time.This critical wireless transmission index parameter can be determined by user or be determined by empirical value.
Step 105: according to image complexity parameter and target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter.
When containing different images complexity parameter (specifically can have picture size, image input frame rate and/or image motion severe degree), target bit rate parameter in Rate Control empirical data table, corresponding image output frame rate parameter.Rate Control empirical data table can be obtained by test, is kept in the control module of transmitting terminal.
Step 106: image output frame rate parameter is sent to video encoding module, to make video encoding module when carrying out Video coding to video source data, utilizes the bit rate output of image output frame rate parameter to coding standard video data to regulate.
By serial ports, image output frame rate parameter can be sent to video encoding module, frame per second parameter register is comprised in video encoding module, by the bit rate output of image output frame rate state modulator video encoding module, fast response time, can reach the response time of 10ms rank.
In video wireless transmission process, above step 101-step 106 constantly repeats, and therefore bit rate output constantly regulates according to the change of image output frame rate parameter, achieves code check Automatic adjusument.
Based on above-described embodiment, the method for code check Automatic adjusument in wireless transmission of the present invention, after acquisition wireless transmission index parameter, can also comprise:
Judge whether wireless transmission index parameter meets threshold value, if so, then code check Automatic adjusument terminates, and if not, then continues to perform step according to wireless transmission index parameter, obtains target bit rate parameter, to step, frame per second parameter is sent to video encoding module.
In the process of repeated execution of steps 101-step 106, also can when the wireless transmission index parameter of receiving terminal feedback reach threshold requirement, stop code check Automatic adjusument, this threshold value can be determined by user or be determined by empirical value.Such as, can illustrate when data loss rate is less than 1% that current video coding bit rate output can match with transmission bandwidth, then now not need to carry out code rate adjustment again, if this standard can not be reached, then need to proceed code check Automatic adjusument.
In addition, when video source data is launched first, the wireless channel transmission quality information fed back owing to not having receiving terminal, can also according to image complexity parameter, inquiry Rate Control empirical data table, what acquisition current video source was corresponding estimates initial bit rate, to ensure that follow-up code rate adjustment can reach the requirement of wireless transmission index parameter fast.Like this, under different images complexity parameter (specifically can have picture size, image input frame rate and/or image motion severe degree) situation can also be comprised in Rate Control empirical data table, corresponding estimates initial bit rate, and this estimates initial bit rate generally needs to ensure to have good picture quality when receiving terminal decoding is play.
Shown in Figure 2, in a kind of wireless transmission of the present invention, the second method of code check Automatic adjusument, comprises the following steps, and the method can be performed by video sending end:
Step 201: according to the video features type parameter of video source data, obtains image complexity parameter;
Step 202: carry out Video coding to video source data, is converted to coding standard video data by video source data;
Step 203: modulate coding standard video data, is converted to video high frequency radio signals by coding standard video data;
Step 204: power amplification is carried out to video high frequency radio signals and launches;
Step 205: receive the wireless channel transmission quality information that receiving terminal sends;
Step 206: according to wireless channel transmission quality information, obtains wireless transmission index parameter;
Step 207: according to wireless transmission index parameter, obtains target bit rate parameter;
Step 208: according to image complexity parameter and target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
Step 209: when carrying out Video coding to video source data, utilizes the bit rate output of image output frame rate parameter to coding standard video data to regulate.
Same, in video wireless transmission process, above step constantly repeats, and therefore bit rate output constantly regulates according to the change of image output frame rate parameter, achieves code check Automatic adjusument.
When video source data is analog video data, the method also comprises:
Before Video coding is carried out to video source data, A/D conversion is carried out to video source data, video source data is converted to digital of digital video data.
In addition, after acquisition wireless transmission index parameter, the method can also comprise:
Judge whether wireless transmission index parameter meets threshold value, if, then code check Automatic adjusument terminates, if not, if not, then continue to perform step according to wireless transmission index parameter, when acquisition target bit rate parameter carries out Video coding to step to video source data, utilize the bit rate output of image output frame rate parameter to coding standard video data to regulate.。
Judging whether the wireless transmission index parameter that receiving terminal feeds back reaches threshold requirement, then do not needing when reaching to carry out code rate adjustment again, if this standard can not be reached, then needing to proceed code check Automatic adjusument.
In the above-described embodiments, concrete, according to the video features type parameter of video source data, obtain image complexity parameter, can comprise:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
Shown in Figure 3, the third method of code check Automatic adjusument in a kind of wireless transmission of the present invention, comprises the following steps:
Step 301: transmitting terminal, according to the video features type parameter of video source data, obtains image complexity parameter;
Step 302: transmitting terminal carries out Video coding to video source data, is converted to coding standard video data by digital of digital video data;
Step 303: transmitting terminal is modulated coding standard video data, is converted to video high frequency radio signals by coding standard video data;
Step 304: transmitting terminal carries out power amplification to video high frequency radio signals and launches;
Step 305: receiving terminal receiver, video high frequency radio signals, carries out demodulation to the video high frequency radio signals received;
Step 306: receiving terminal, according to the coding standard video data after demodulation, obtains wireless channel transmission quality information and sends to transmitting terminal;
Step 307: transmitting terminal receives wireless channel transmission quality information;
Step 308: according to wireless channel transmission quality information, obtains wireless transmission index parameter;
Step 309: according to wireless transmission index parameter, obtains target bit rate parameter;
Step 310: according to image complexity parameter and target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
Step 311: when carrying out Video coding to video source data, utilizes the bit rate output of image output frame rate parameter to coding standard video data to regulate.
In video wireless transmission process, above step constantly repeats, and therefore bit rate output constantly regulates according to the change of image output frame rate parameter, achieves code check Automatic adjusument.
Based on above-described embodiment, after acquisition wireless transmission index parameter, the method can also comprise:
Judge whether wireless transmission index parameter meets threshold value, if, then code check Automatic adjusument terminates, if not, if not, then continue to perform step according to wireless transmission index parameter, when acquisition target bit rate parameter carries out Video coding to step to video source data, utilize the bit rate output of image output frame rate parameter to coding standard video data to regulate.
Like this, by reference to the wireless transmission index of reflection wireless bandwidth situation, the image complexity parameter of reflection image complexity, dynamic adjustments video encoder module frame per second, and then realize the encoder bit rate regulating Video coding in real time, the shake that the various factors that can automatically adapt to wireless signal-path band width causes, jitter immunity is strong, thus achieves transmitting terminal and receiving terminal transmission of video postpones little, that image is smooth effect.Meanwhile, inquiry Rate Control empirical data table obtains frame per second parameter, and code rate adjustment response is fast, and complexity is low.
Accordingly, the present invention also provides the device of code check Automatic adjusument in the first wireless transmission, shown in Figure 4, this device can comprise: first obtains unit 141, receiving element 142, second obtains unit 143, the 3rd acquisition unit 144, the 4th obtains unit 145 and transmitting element 146.
Wherein, first obtains unit 141, for the video features type parameter according to video source data, obtains image complexity parameter;
Receiving element 142, for receiving the wireless channel transmission quality information that receiving terminal sends;
Can be coding standard video data to video source data through the video transcoding of video encoding module, be video high frequency radio signals to coding standard video data through the modulation conversion of modulation module, to video high frequency radio signals after power amplifier module amplifies and launches, receive this wireless channel transmission quality information;
Second obtains unit 143, for according to wireless channel transmission quality information, obtains wireless transmission index parameter;
3rd obtains unit 144, for according to wireless transmission index parameter, obtains target bit rate parameter;
4th obtains unit 145, for according to image complexity parameter and target bit rate parameter, inquires about Rate Control empirical data table, obtains image output frame rate parameter;
Transmitting element 146, for image output frame rate parameter is sent to video encoding module, to make video encoding module when carrying out Video coding to video source data, utilizes the bit rate output of image output frame rate parameter to coding standard video data to regulate.
In this wireless transmission, the device of code check Automatic adjusument can also comprise:
Judging unit, for judging whether wireless transmission index parameter meets threshold value.
When the judged result of judging unit represents that wireless transmission index parameter meets threshold value, then code check Automatic adjusument terminates; When the judged result of judging unit represents that wireless transmission index parameter does not meet threshold value, then the 3rd acquisition unit, the 4th acquisition unit and transmitting element need to proceed code check Automatic adjusument.
In addition, first obtain unit can be specifically for:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
In the above-described embodiments, in this wireless transmission, the device of code check Automatic adjusument can be the control unit in transmitting terminal, preserves in this control unit to Rate Control empirical data table and image complexity and video features type empirical data table.By reference to the wireless transmission index of reflection wireless bandwidth situation, the image complexity parameter of reflection image complexity, dynamic adjustments video encoder module frame per second, and then realize regulating encoder bit rate in real time, code rate adjustment response is fast, complexity is low, the shake that the various factors that can automatically adapt to wireless signal-path band width causes, jitter immunity is strong, thus achieves transmitting terminal and receiving terminal transmission of video postpones little, that image is smooth effect.
Accordingly, the present invention also provides the device of code check Automatic adjusument in the second wireless transmission, shown in Figure 5, and this device comprises:
Video encoding module 11, modulation module 12, power amplifier module 13, control module 14;
Wherein, video encoding module 11, for carrying out Video coding to video source data, is converted to coding standard video data by digital of digital video data;
Video encoding module can select MPEG-2 video encoding module, MPEG-4 video encoding module or H.264 video encoding module.H.264 encoding due to the performance of its high-quality, is the optimal way carrying out Video coding in the present invention.H.264 encode primarily of infra-frame prediction, inter prediction (motion estimation and compensation), the integer transform of approximate DCT, the submodules such as quantification and entropy code are formed.
Modulation module 12, for modulating coding standard video data, is converted to video high frequency radio signals by coding standard video data;
Modulation module can select COFDM modulation module, high frequency radio signals is modulated into by DVB-T transmission standard, COFDM modulation module is primarily of OFDM coded modulation (DVB-T adjuster), and RF DAC (radio frequency D/A converter), I/Q modulation waits submodule to form.
Power amplifier module 13, for carrying out power amplification to video high frequency radio signals and launching;
Control unit 14 can be the device of code check Automatic adjusument in the first wireless transmission in above-described embodiment.
Shown in Figure 6, in this wireless transmission, the device of code check Automatic adjusument can also comprise:
A/D modular converter 15;
A/D modular converter 15, for when video source data is analog video data, before carrying out Video coding to video source data, carries out A/D conversion to video source data, video source data is converted to digital of digital video data.
In the above-described embodiments, in this wireless transmission, the device of code check Automatic adjusument can be transmitting terminal, the wireless transmission index of this transmitting terminal by reference to reflection wireless bandwidth situation, the image complexity parameter of reflection image complexity, dynamic adjustments video encoder module frame per second, and then realize regulating encoder bit rate in real time, the shake that the various factors that can automatically adapt to wireless signal-path band width causes, jitter immunity is strong, thus achieves transmitting terminal and receiving terminal transmission of video postpones little, that image is smooth effect.Meanwhile, inquiry Rate Control empirical data table obtains frame per second parameter, and code rate adjustment response is fast, and complexity is low.
Accordingly, the present invention also provides the system of code check Automatic adjusument in a kind of wireless transmission, shown in Figure 7, and this system can comprise:
Transmitting terminal 1 and receiving terminal 2;
Wherein, receiving terminal 1, for the video high frequency radio signals that receiving end/sending end sends, to the video high frequency radio signals demodulation received; According to the coding standard video data after demodulation, obtain wireless channel transmission quality information and send to transmitting terminal;
Transmitting terminal 2 can be the device of code check Automatic adjusument in the second wireless transmission in above-described embodiment.
Shown in Figure 8, the operation principle of native system is:
Control module in transmitting terminal is according to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree; When video source data is analog video data, the A/D modular converter in transmitting terminal carries out A/D conversion to video source data, and video source data is converted to digital of digital video data; Video encoding module in transmitting terminal carries out Video coding to video source data, digital of digital video data is converted to coding standard video data; Modulation module in transmitting terminal is modulated coding standard video data, and coding standard video data is converted to video high frequency radio signals; Power amplifier module in transmitting terminal carries out power amplification to video high frequency radio signals and launches.
Receiving terminal receiver, video high frequency radio signals, carries out demodulation to the video high frequency radio signals received; Receiving terminal, according to the coding standard video data after demodulation, obtains wireless channel transmission quality information and sends to transmitting terminal.
Transmitting terminal receives wireless channel transmission quality information; Control module in transmitting terminal receives wireless channel transmission quality information; According to wireless channel transmission quality information, obtain wireless transmission index parameter; According to wireless transmission index parameter, obtain target bit rate parameter; According to image complexity parameter and target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter; Image output frame rate parameter is sent to the video encoding module in transmitting terminal by the control module in transmitting terminal; When carrying out Video coding to video source data, the video encoding module in transmitting terminal utilizes the bit rate output of image output frame rate parameter to coding standard video data to regulate.
Repeat above step, after acquisition wireless transmission index parameter, judge whether wireless transmission index parameter meets threshold value, if so, then code check Automatic adjusument terminates, and if not, then continues to perform subsequent step.
Shown in Figure 9, for a kind of application scenarios demonstration graph of native system, such as in the scene of the accident, the transmitting terminal of video acquisition function that what individual soldier personnel carried have, receiving terminal is carried in Emergency communication vehicle, vehicle-mounted AV matrix is utilized to select one or more video input to show, realize carrying out live to field condition in real time, the shake that the various factors utilizing the system of code check Automatic adjusument in wireless transmission of the present invention can automatically adapt to wireless signal-path band width causes, jitter immunity is strong, thus achieves transmitting terminal and receiving terminal transmission of video postpones little, that image is smooth effect.Meanwhile, inquiry Rate Control empirical data table obtains frame per second parameter, and code rate adjustment response is fast, and reach the response time of 10ms rank, complexity is low.Obviously can improve the video communication effect of individual soldier's transmitter in various application scenarios in wireless transmissions, make full use of wireless signal-path band width resource, greatly improve the performance that wireless video image delivering system conforms.
It should be noted that, in this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For system disclosed in embodiment or device, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (13)
1. the method for code check Automatic adjusument in wireless transmission, it is characterized in that, described method comprises:
According to the video features type parameter of video source data, obtain image complexity parameter;
Receive the wireless channel transmission quality information that receiving terminal sends;
According to described wireless channel transmission quality information, obtain wireless transmission index parameter;
According to wireless transmission index parameter, obtain target bit rate parameter;
According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
Described image output frame rate parameter is sent to video encoding module, to make described video encoding module when carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
2. method according to claim 1, is characterized in that, after acquisition wireless transmission index parameter, described method also comprises:
Judge whether described wireless transmission index parameter meets threshold value, if so, then code check Automatic adjusument terminates, if not, then continue to perform step according to wireless transmission index parameter, obtain target bit rate parameter, to step, described frame per second parameter is sent to described video encoding module.
3. method according to claim 1, is characterized in that, the described video features type parameter according to video source data, obtains image complexity parameter, comprising:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, described image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
4. the method for code check Automatic adjusument in wireless transmission, it is characterized in that, described method comprises:
According to the video features type parameter of video source data, obtain image complexity parameter;
Video coding is carried out to described video source data, digital of digital video data is converted to coding standard video data;
Described coding standard video data is modulated, described coding standard video data is converted to video high frequency radio signals;
Described video high frequency radio signals is carried out power amplification and launched;
Receive the wireless channel transmission quality information that receiving terminal sends;
According to described wireless channel transmission quality information, obtain wireless transmission index parameter;
According to wireless transmission index parameter, obtain target bit rate parameter;
According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter;
When carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
5. method according to claim 4, is characterized in that, when described video source data is analog video data, described method also comprises:
Before Video coding is carried out to described video source data, A/D conversion is carried out to described video source data, described video source data is converted to digital of digital video data.
6. method according to claim 4, is characterized in that, after acquisition wireless transmission index parameter, described method also comprises:
Judge whether described wireless transmission index parameter meets threshold value, if, then code check Automatic adjusument terminates, if not, then continue to perform step according to wireless transmission index parameter, when acquisition target bit rate parameter carries out Video coding to step to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
7. method according to claim 4, is characterized in that, the described video features type parameter according to video source data, obtains image complexity parameter, comprising:
According to the video features type parameter of video source data, query image complexity and video features type empirical data table, obtain image complexity parameter, described image complexity parameter comprises picture size, image input frame rate and/or image motion severe degree.
8. the method for code check Automatic adjusument in wireless transmission, it is characterized in that, described method comprises:
Transmitting terminal, according to the video features type parameter of video source data, obtains image complexity parameter;
Described transmitting terminal carries out Video coding to described video source data, and described video source data is converted to coding standard video data; Described coding standard video data is modulated, described coding standard video data is converted to video high frequency radio signals; Described video high frequency radio signals is carried out power amplification and launched;
Receiving terminal receives described video high frequency radio signals, carries out demodulation to the described video high frequency radio signals received; According to the coding standard video data after demodulation, obtain wireless channel transmission quality information and send to described transmitting terminal;
Described transmitting terminal receives described wireless channel transmission quality information; According to described wireless channel transmission quality information, obtain wireless transmission index parameter; According to wireless transmission index parameter, obtain target bit rate parameter; According to described image complexity parameter and described target bit rate parameter, inquiry Rate Control empirical data table, obtains image output frame rate parameter; When carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
9. the device of code check Automatic adjusument in wireless transmission, it is characterized in that, described device comprises:
First obtains unit, for the video features type parameter according to video source data, obtains image complexity parameter;
Receiving element, for receiving the wireless channel transmission quality information that receiving terminal sends;
Second obtains unit, for according to described wireless channel transmission quality information, obtains wireless transmission index parameter;
3rd obtains unit, for according to wireless transmission index parameter, obtains target bit rate parameter;
4th obtains unit, for according to described image complexity parameter and described target bit rate parameter, inquires about Rate Control empirical data table, obtains image output frame rate parameter;
Transmitting element, for described image output frame rate parameter is sent to video encoding module, to make described video encoding module when carrying out Video coding to described video source data, the bit rate output of described image output frame rate parameter to described coding standard video data is utilized to regulate.
10. device according to claim 9, is characterized in that, described device also comprises:
Judging unit, for judging whether described wireless transmission index parameter meets threshold value.
In 11. 1 kinds of wireless transmission, the device of code check Automatic adjusument, is characterized in that, described device comprises:
Control module, video encoding module, modulation module, power amplifier module;
Described video encoding module, for carrying out Video coding to video source data, is converted to coding standard video data by digital of digital video data;
Described modulation module, for modulating described coding standard video data, is converted to video high frequency radio signals by described coding standard video data;
Described power amplifier module, for carrying out power amplification to described video high frequency radio signals and launch;
Described control unit is the device described in any one of claim 9-10.
12. devices according to claim 11, is characterized in that, described device also comprises:
A/D modular converter;
Described A/D modular converter, for when described video source data is analog video data, before carrying out Video coding to described video source data, carries out A/D conversion to described video source data, described video source data is converted to digital of digital video data.
In 13. 1 kinds of wireless transmission, the system of code check Automatic adjusument, is characterized in that, described system comprises:
Transmitting terminal and receiving terminal;
Described receiving terminal, for receiving the video high frequency radio signals that described transmitting terminal sends, to the described video high frequency radio signals demodulation received; According to the coding standard video data after demodulation, obtain wireless channel transmission quality information and send to described transmitting terminal;
Described transmitting terminal is the device described in any one of claim 11-12.
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Families Citing this family (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607562A (en) * | 2013-11-08 | 2014-02-26 | 江苏万联新兆信息科技有限公司（外商合资） | Intelligent mobile phone video monitoring method based on instant communication system |
| CN103686346A (en) * | 2013-12-26 | 2014-03-26 | 乐视网信息技术（北京）股份有限公司 | Video playing unsmoothness switching method and system |
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| CN105323592A (en) * | 2014-07-11 | 2016-02-10 | 中兴通讯股份有限公司 | Code rate control method and device |
| CN104219539B (en) * | 2014-09-29 | 2018-10-30 | 公安部第一研究所 | A method of the Video coding based on TD-LTE Channel Detections and transmission |
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| CN109600579A (en) * | 2018-10-29 | 2019-04-09 | 歌尔股份有限公司 | Video wireless transmission method, apparatus, system and equipment |
| CN109584655A (en) * | 2018-12-03 | 2019-04-05 | 贵阳朗玛信息技术股份有限公司 | A kind of remote demonstration method, apparatus, tutoring system and readable storage medium storing program for executing |
| WO2020150994A1 (en) * | 2019-01-25 | 2020-07-30 | 深圳市大疆创新科技有限公司 | Method and device for determining quantity of image information |
| CN111416986B (en) * | 2020-03-24 | 2021-12-10 | 中国建设银行股份有限公司 | Code rate determining method and device, storage medium and electronic equipment |
| CN112532345B (en) * | 2020-11-03 | 2022-02-18 | 广州技象科技有限公司 | Link self-adaption method and device based on user data type requirements |
| CN112565834B (en) * | 2021-02-24 | 2021-05-11 | 北京创世云科技股份有限公司 | Method and device for controlling output data and electronic equipment |
| CN113949825A (en) * | 2021-11-03 | 2022-01-18 | 江苏金视传奇科技有限公司 | High-information-content image efficient transmission method and system |
| CN114827301B (en) * | 2022-06-06 | 2023-08-29 | 广州市百果园信息技术有限公司 | Data transmission simulation method, device, equipment and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777291A (en) * | 2005-12-08 | 2006-05-24 | 合肥邦略科技发展有限公司 | Wireless digital multi-channel video, voice and data mobile transmission device |
| CN101800891A (en) * | 2010-01-22 | 2010-08-11 | 中兴通讯股份有限公司 | Method and system for automatic control of data transmission rate |
| CN102457728A (en) * | 2010-10-27 | 2012-05-16 | 杭州华三通信技术有限公司 | Method and device for video image encoding |
-
2013
- 2013-01-29 CN CN201310034273.3A patent/CN103096084B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1777291A (en) * | 2005-12-08 | 2006-05-24 | 合肥邦略科技发展有限公司 | Wireless digital multi-channel video, voice and data mobile transmission device |
| CN101800891A (en) * | 2010-01-22 | 2010-08-11 | 中兴通讯股份有限公司 | Method and system for automatic control of data transmission rate |
| CN102457728A (en) * | 2010-10-27 | 2012-05-16 | 杭州华三通信技术有限公司 | Method and device for video image encoding |
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