Moving picture coding apparatus and TV phone using the same

Abstract

To provide a moving picture coding apparatus and TV phone wherein a handwritten image is coded with less quantity of calculation and less power consumption. The moving picture signal from camera is combined with handwritten image signal from pen input by combining circuit. Then, combined image as well as coding region information to discriminate a region to be coded is fed to motion compensative moving picture coding circuit. Motion compensative moving picture coding circuit deems that the region needless to be coded is the same as the latest frame. According to the present invention, a quantity of calculation and power consumption of moving picture coding apparatus and TV phone using the same can be reduced, by coding only the newly inputted handwritten image. Degradation of image quality can be reduced by putting its motion vector “0”.

What is claimed is:  
     
         1 . A moving picture coding apparatus which comprises: 
 a combining circuit for combining a moving picture and a handwritten image and for outputting a combined image; and    a motion compensative moving picture coding circuit for coding said moving picture and a newly added part of said handwritten image which differs from a previously coded part of said handwritten image.    
     
     
         2 . A TV phone which comprises: 
 a voice input for receiving voice data;    a voice coder for coding said voice data;    a moving picture input for receiving moving picture data;    a pen input for receiving handwritten image data;    a moving picture coding apparatus which comprises: 
 a combining circuit for combining said moving picture data and said handwritten image data and for outputting a combined image; and a motion compensative moving picture coding circuit for coding said moving picture data and a newly added part of said handwritten image data which differs from a previously coded part of said handwritten image data; and  
 a multiplexer for multiplexing said coded voice data output from said voice coder and an output from said moving picture coding apparatus.