Video Coding Device And Method

Abstract

A video encoding method includes adding, to a bitstream, an indicator of whether a frame resolution is to be reduced. The method also includes, when said indicator indicates that the frame resolution is to be reduced, encoding a block of video data on a current video frame without motion compensation. A video decoding method includes receiving, as a syntax element from a bitstream, an indicator of whether a frame resolution is to be reduced. The method also includes, when said indicator indicates that the frame resolution is to be reduced, decoding a block of video data on a video frame without motion compensation.

What is claimed is: 
     
         1 . A video encoding method comprising:
 adding, to a bitstream, an indicator of whether a frame resolution is to be reduced; and   when said indicator indicates that the frame resolution is to be reduced, encoding a block of video data on a current video frame without motion compensation.   
     
     
         2 . The method of  claim 1 , further comprising, when said indicator indicates that the frame resolution is to be reduced:
 indicating zero motion vector value in the bitstream.   
     
     
         3 . The method of  claim 1 , further comprising, when said indicator indicates that the frame resolution is to be reduced:
 inferring motion vector value as zero without indicating in a bitstream.   
     
     
         4 . The method of  claim 1 , further comprising: when both (i) a subsequent bit rate of a communication channel, determined after said encoding, is less than a threshold value and (ii) a current bit rate exceeds the threshold value:
 setting a value of said indicator to true.   
     
     
         5 . The method of  claim 4 , further comprising: when one of (i) the subsequent bit rate exceeds the threshold value and (ii) the current bit rate is less than the threshold value:
 setting the value of said indicator to false.   
     
     
         6 . The method of  claim 4 , further comprising:
 generating an encoded bitstream;   after said generating an encoded bitstream, determining the current bit rate; and   after said determining the current bit rate, determining the subsequent bit rate.   
     
     
         7 . A video encoding device comprising:
 a processor;   a memory storing non-transitory computer-readable instructions that, when executed by the processor, control the processor to execute the method of  claim 1 .   
     
     
         8 . A video decoding method comprising:
 receiving, as a syntax element from a bitstream, an indicator of whether a frame resolution is to be reduced; and   when said indicator indicates that the frame resolution is to be reduced, decoding a block of video data on a current video frame without motion compensation.   
     
     
         9 . The method of  claim 8 , further comprising, when said indicator indicates that the said frame resolution is to be reduced:
 inferring motion vector value as zero without parsing said bitstream.   
     
     
         10 . A video decoding device comprising:
 a processor;   a memory storing non-transitory computer-readable instructions that, when executed by the processor, control the processor to execute the method of  claim 8 .