Image receiving device, image transmission system, and image receiving method

Abstract

An image receiving method for a decoder, includes receiving an encoding stream multiplexed into three levels of sequence, picture, and slice, receiving an environmental information of an image receiving device and determining a parameter to be changed in the image encoding stream based on the environmental information of the image receiving device, changing a parameter at the sequence level, changing a parameter at the picture level and at the sequence level for each picture based on information indicating accuracy of image recognition, and statistical information obtained by decoding, and changing a parameter in the slice header based on the information indicating accuracy of image recognition, and the statistical information obtained by decoding.

What is being claimed: 
     
         1 . An image receiving method for a decoder, the method comprising:
 (a) receiving an encoding stream multiplexed into three levels of sequence, picture, and slice;   (b) receiving an environmental information of an image receiving device and determining a parameter to be changed in the image encoding stream based on the environmental information of the image receiving device;   (c) changing a parameter at the sequence level;   (d) changing a parameter at the picture level and at the sequence level for each picture based on information indicating accuracy of image recognition, and statistical information obtained by decoding; and   (e) changing a parameter in the slice header based on the information indicating accuracy of image recognition, and the statistical information obtained by decoding.   
     
     
         2 . The image receiving method according to  claim 1 ,
 wherein the parameter at the picture level and at the sequence level defines a filter coefficient for determining whether to perform deblocking filtering or performing processing.   
     
     
         3 . The image receiving method according to  claim 1 ,
 wherein (d) comprises:   (d1) decoding on a first picture and outputting a picture processing result from a processed macro block;   (d2) starting image recognition based on the picture processing result;   (d3) changing a parameter in a second picture based on the statistical information and decoding the second picture; and   (d4) outputting the information indicating accuracy of image recognition and changing a parameter of a third picture based on the information indicating accuracy of image recognition.   
     
     
         4 . The image receiving method according to  claim 1 ,
 wherein (e) comprises:   (e1) decoding on a first slice in a first picture and outputting a slicing result;   (e2) starting image recognition based on the slicing result;   (e3) changing a parameter in a second slice in the first picture based on the statistical information and decoding the second slice in the first picture; and   (e4) outputting the information indicating accuracy of image recognition and changing a parameter of a first slice in a second picture based on the information indicating accuracy of image recognition.   
     
     
         5 . The image receiving method according to  claim 4 , further comprising:
 (e5) decoding on the second slice in the first picture and outputting a slicing result;   (e6) starting image recognition based on the slicing result; and   (e4) outputting the information indicating accuracy of image recognition and changing a parameter of a second slice in the second picture based on the information indicating accuracy of image recognition.   
     
     
         6 . The image receiving method according to  claim 5 ,
 wherein the information indicating accuracy of image recognition of the second slice in the first picture is used for change of a parameter of a first slice in a third picture.