CN103428474A - Video and audio monitoring method based on cell phone mobile terminal design - Google Patents
Video and audio monitoring method based on cell phone mobile terminal design Download PDFInfo
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- CN103428474A CN103428474A CN2012101571190A CN201210157119A CN103428474A CN 103428474 A CN103428474 A CN 103428474A CN 2012101571190 A CN2012101571190 A CN 2012101571190A CN 201210157119 A CN201210157119 A CN 201210157119A CN 103428474 A CN103428474 A CN 103428474A
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Abstract
The invention discloses a video and audio monitoring method based on cell phone mobile terminal design. The video and audio monitoring method is characterized by including the following steps of step 1, setting varieties and parameter sets which a video encoder and decoder support, step 2, setting variety parameter sets which an audio encoder and decoder support, and step 3, setting negotiatory parameters of the video encoder and decoder and the audio encoder and decoder in work. According to the video and audio monitoring method, on-spot image and voice signal collection and compression processing are carried out through a front-end device, transmission is achieved through a public wireless mobile communication network, receiving is achieved through a cell phone terminal, therefore, a user can check monitoring fields any time and any where, and a terminal user can command monitoring fields and determine commands according to needs.
Description
Technical field
The present invention relates to a kind of the realization based on the looking of adaptive bandwidth, Voice Surveillance technology, particularly a kind of video and audio method for supervising based on the mobile terminal of mobile telephone design on mobile device.
Background technology
Along with mobile network's fast development, the network bandwidth has obtained very large development, and as the rapid rising of WLAN (wireless local area network) high speed bandwidth and 3G business, mobile terminal device (mobile phone, PDA, notebook computer etc.) level of hardware improves constantly and be universal; Simultaneously, development, particularly developing rapidly of 264 video compression technologies depending on, audio compression techniques, make the video data that occupies very big data volume to be compressed into very little, for the mobile phone terminal transmission is looked, the Voice Surveillance data provide may.And the consumer, finally can realize along with the development of network and various technology for the demand by the looking of the mobile far-end of communication eventually, Voice Surveillance.This patent just be based on above-mentioned development and propose a kind of based on the looking of mobile terminal of mobile telephone design, Voice Surveillance, it also is applicable to other terminal (as PDA, computer etc.) is set simultaneously.
At present, the video and audio monitoring based on the mobile terminal of mobile telephone design, the Main Bottleneck problem is:
One, need the data volume of transmission huge.Video data particularly, the rgb video data of calculating 320X240 by per second 15 frames are 15X320X240X4X8, are about 35Mbps, also do not comprise voice data, huge like this data volume, wireless network can not real-time Transmission.
Two, the mobile phone hardware configuration is relatively low, as CPU, internal memory etc.With regard to by CPU, a PC, the most only be more than CPU configuration 3G, but the CPU of a mobile phone mobile device be generally that several 10M arrive several 100M, and CPU is larger, bring such as problems such as consumption heatings manyly, make the CPU of mobile phone be difficult to the hardware configuration of PC.
Three, wireless network bandwidth is lower and easily produce the Network Packet Loss phenomenon.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of video and audio method for supervising based on the mobile terminal of mobile telephone design, it carries out image scene, sound signal collecting, compression processing by headend equipment, by public's mobile radio networks, transmit, by utilizing mobile phone terminal to receive, make the user can go to the checking monitoring scene whenever and wherever possible, the terminal use also can need the monitoring site commander, and order is confirmed.
The present invention solves above-mentioned technical problem by following technical proposals: a kind of video and audio method for supervising based on the mobile terminal of mobile telephone design, it is characterized in that, and it comprises the following steps:
Step 1: kind and parameter set that agreement video coding and decoding device is supported;
Step 2: the kind parameter set that agreement audio frequency coding and decoding device is supported;
Step 3: when work is set, consult look, audio frequency coding and decoding device parameter.
Preferably, when during the described video and audio method for supervising monitoring based on mobile terminal of mobile telephone design, the network bandwidth changes, when even poor the or network of mobile phone terminal hardware is poor, mobile phone terminal can be differentiated its changing value and select lower coding parameter.
Positive progressive effect of the present invention is: the present invention carries out image scene, sound signal collecting, compression processing by headend equipment, by public's mobile radio networks, transmit, by utilizing mobile phone terminal to receive, make the user can go to the checking monitoring scene whenever and wherever possible, the terminal use also can need the monitoring site commander, and order is confirmed.
The accompanying drawing explanation
Fig. 1 is the schematic flow sheet that the present invention is based on the video and audio method for supervising of mobile terminal of mobile telephone design.
Embodiment
As shown in Figure 1, the video and audio method for supervising that the present invention is based on mobile terminal of mobile telephone design comprises the following steps:
Step 1: kind and parameter set that agreement video coding and decoding device is supported: local handset need to possess the video coding and decoding device of main flow usually as H263, wherein several such as H264, elementary video coding and decoding device, other the video coding and decoding device that can be used as expansion should supported on mobile phone of the present invention to be equipped with.Video coding and decoding device parameter is mainly as follows: the kind of video coding and decoding device; The height of coding and decoding image, wide; The code check of encoder, frame number, I, P frame arrange etc.; And other relevant parameter.
Step 2: the kind parameter set that agreement audio frequency coding and decoding device is supported.Similar with video coding and decoding device, the local handset end need to be equipped with basic audio frequency coding and decoding device, possesses autgmentability simultaneously; Its parameter mainly comprises as follows: the kind of audio frequency coding and decoding device; The code check of encoder, frame per second etc.
Step 3: when work is set, consult look, audio frequency coding and decoding device parameter and other parameter.Consult to refer to the coupling behavior of carrying out around each parameter during work when both sides connect situation.Mainly comprise the steps: to obtain local handset hardware performance, network condition; The looking of both sides' encoder support, sound coding and decoding device form and the preferential form of selecting; According to 1,2 results looked, the setting of sound coding and decoding implement body parameter: video coding and decoding device image size, frame per second, I frame, P frame, code check, the network bandwidth etc.; Audio frequency coding and decoding device code check, bandwidth etc.; Every bag size after the time that negotiation audio pack size and every frame are play, video subpackage, the frequency of each presentation of video frames etc.Carry out at regular intervals the network state detection, change and whether over the bandwidth threshold values, determine whether and need to reinitialize the local video coding parameter according to grid, parameter mainly comprises frame per second, I frame, P frame, code check, the network bandwidth etc., but video encoder kind, image size can not be adjusted, otherwise the other side can not be correctly decoded image.When during the described video and audio method for supervising monitoring based on the mobile terminal of mobile telephone design, the network bandwidth changes, when even poor the or network of mobile phone terminal hardware is poor, mobile phone terminal can be differentiated its changing value and select lower coding parameter, to guarantee to carry out the video/audio transmission, i.e. so-called pro-jobs principle.
Characteristics of the present invention are as follows: one, propose to be equipped with several main flows and possess video volume, the code solution device that improves autgmentability.The video coding and decoding device of the generally acknowledged remarkable and applicable mobile network's real-time Transmission of compression effectiveness has external H264 in the world at present, H263, and MPGE-4 and the domestic AVS promoted, all can be used as the coding and decoding device that video is selected; During work, the transmitting terminal local data can select one of them to be encoded, and receiving terminal can be decoded with corresponding decoder.Which kind of coding and decoding device concrete both sides can select, and only need both sides to carry out corresponding negotiation when work and get final product.Like this, we only need to load at mobile phone terminal simultaneously, and various video is compiled, H263, H264, the MPGE-4 of code device, particularly main flow, AVS video coding and decoding.Video coding and decoding device exists to be constantly updated and development, also needs the developer can hold more other video coding and decoding, to possess autgmentability.Two, propose to be equipped with several main flows and possess audio frequency volume, the code solution device that improves autgmentability.The audio frequency coding and decoding device of the generally acknowledged remarkable and applicable mobile network's real-time Transmission of compression effectiveness has AMR, AAC etc. in the world at present, all can be used as the audio frequency coding and decoding of our video and audio monitoring; During work, the transmitting terminal local data can select one of them to be encoded, and receiving terminal can be decoded with corresponding decoder.Which kind of coding and decoding device concrete both sides can select, and only need both sides to carry out corresponding negotiation when work and get final product.Equally, we only need to load multiple audio frequency volume, code device at mobile phone terminal simultaneously.Also should be taken into account that audio frequency coding and decoding device exists continuous renewal and development, makes it to possess autgmentability simultaneously.Three, propose to use a kind of video and audio monitoring parameter negotiation mechanism.During user job, the parameter negotiation between priority user.It is as follows that major parameter is consulted: compatible look, the audio coder kind, video image is big or small, audio pack is big or small, video packets is big or small etc.To be both sides of the same racely look, select optimum sound, image effect under the condition of audio frequency coding and decoding device meeting to possess the result of consulting; When not possessing the video condition, still can carry out audio work.What another need to be consulted is video subpackage size, because the video data after the compression of every frame is still very large, need to be divided into suitable big or small bag, the subpackage size, and can have influence on the other side normal transmission, He Bao, decoding.Four, propose to use a kind of self-adapted to mobile phone performance, network condition mechanism.Different mobile phones, performance there are differences, such as the CPU ability, internal memory, they directly have influence on looks (sound) image (sound) quality and code check of coding and decoding frequently, if only make unified regulation, goes to select fixing coding and decoding device, selects the parameter of fixing coding and decoding device, not only can not bring into play the performance of each mobile phone, and easily occur the low performance mobile phone can not meet in real time look, the demand of sound work.Therefore should be according to the characteristic of property of local handset at the beginning of every task, the actual conditions of network condition are selected to look accordingly, audio frequency coding and decoding device, and corresponding parameter, in order to consult with the other side.And the local network situation is not unalterable, according to specific time and site all may change, therefore need to consider to exceed certain bandwidth when bandwidth, local parameter need to partly reset, when reseting, because people's ear is higher to audio resolution, can only reinitialize video parameter, wherein figure image height, the wide decoding that directly has influence on the other side of local compression, thereby can not change local figure image height, wide.This adjusting is only for this locality, and optional for coding and decoding; Local parameter change, the other side is normal coding and decoding still.
The above is not limited to the present invention, within the spirit and principles in the present invention all, and that does anyly is equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (2)
1. the video and audio method for supervising based on the mobile terminal of mobile telephone design, is characterized in that, it comprises the following steps:
Step 1: kind and parameter set that agreement video coding and decoding device is supported;
Step 2: the kind parameter set that agreement audio frequency coding and decoding device is supported;
Step 3: when work is set, consult look, audio frequency coding and decoding device parameter.
2. require the 1 described video and audio method for supervising based on the mobile terminal of mobile telephone design according to patent, it is characterized in that, when during the described video and audio method for supervising monitoring based on the mobile terminal of mobile telephone design, the network bandwidth changes, when even poor the or network of mobile phone terminal hardware is poor, mobile phone terminal can be differentiated its changing value and select lower coding parameter.
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| CN110830748A (en) * | 2019-12-19 | 2020-02-21 | 广东以诺通讯有限公司 | Video call method and system |
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Application publication date: 20131204 |