| 摘要 |
<p>PURPOSE:To reduce the number of encoding bits per one block by applying a subsampling in a proportion of n:1 against a picture element block signal and converting and vector-quantizing the n-number of blocks to one block in bulk. CONSTITUTION:Against an inputted picture element block, a subsampling process is applied in a ratio of n:1 (n is real number of one or more) at a subsampling device 2, and a reproducing picture is obtained a subsampled portion being interpolated by an interpolator 2, and a difference between an original picture is taken at a subtractor 3, detecting an error by an error detector 4. And it is compared with a prescribed threshold by a process deciding device 5 and when it is under the threshold, it is recognized as a flat part, setting switches 6 and 7 to dotted lines sides as shown in figure. And the subsampling process in a ratio of n:1 is performed at a subsampling device 8, converting the n- number of blocks to one block and sending it to a vector quantizer 9. Thus, the n-number of blocks can be transmitted in one code at the flat part, thereby encoding process being performed with less number of bits.</p> |
