Safety of image transmission method based on fountain codes and adaptive population

Safety of image transmission method based on fountain codes and adaptive population

  • CN 105,553,618 B
  • Filed: 12/22/2015
  • Issued: 05/10/2019
  • Est. Priority Date: 12/22/2015
  • Status: Active Grant
First Claim
Patent Images

1. the safety of image transmission method based on fountain codes and adaptive population, which is characterized in that this method uses logicalLetter system model includes:

  • transmitting terminal Alice, legitimate receipt end Bob and eavesdropping end Eve, and wherein transmitting terminal Alice is to timingProlong under constraint T, piece image be safely transmitted to legitimate receipt end Bob, and the preferential safety for guaranteeing interesting image regions,Specific step is as follows;

    1) image is subjected to region segmentation, extracts area-of-interest and background area, obtain KroiA area-of-interest original packetAnd KbgA background area original packet;

    2) information that transmitting terminal Alice is fed back according to legitimate receipt end Bob, i.e., the channel state information and two classes of legal linkPacket reception state mark, determine type of data packet to be passed, wherein two class packet reception states mark be respectively flag_roi andflag_bg;

    3) transmitting terminal Alice carries out adaptive resource allocation according to the channel state information that legitimate receipt end Bob is fed back, and determinesSend the modulation system of power and use;

    4) fountain coding is carried out to the area-of-interest original packet of type to be passed or background area original packet and obtains coding packet;

    5) coding packet obtained in step

         4) is modulated, is transmitted later by wireless channel, in receiving end by legitimate receiptBob is held to receive with eavesdropping end Eve, before transmit next time, legitimate receipt end Bob is fed back this time to transmitting terminal AliceChannel state information and two classes coding packet reception state mark when finishing receiving;

    6) step

         1) is repeated to

         5), the two class packet reception state identification informations fed back according to delay constraint T and legitimate receipt end BobJudging whether to terminate transmission, the condition of transmission ending is that the number of transmissions reaches delay constraint T or in given delay constraint T,Legitimate receipt end Bob, which has correctly received, can restore original image encoding region of interest packet and background area coding packet,In, what delay constraint T was indicated is the maximum times for allowing to transmit data packet.

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