| 摘要 |
<p>PURPOSE:To suppress generating information and to prevent the deterioration of a picture quality when the quantity of a movement is large or at the time of a scene change by fetching the average value of input blocks in an interblock matching. CONSTITUTION:In a first processing, a block selector 23 outputs a 0 block. At this time, the output 17 of a distortion computing element 16 goes to the average value (m) of an input signal block. The average value (m) is quantized in a quantizer 20 and a quantized average value m' is inputted to a selector 23. A quantizing index 21 is outputted to an index selector 25. In a second processing, an average value block m'' for defining the value m' to be respective picture element values in the block is outputted from the selector 23. At this time, the output 17 goes to d0. After a third time, a preceding frame block is outputted. Finally, the output 19 of a comparator 18 outputs the index 19 of the block for applying a minimum matching distortion in the L+1 matchings from d0 to dL. The selector 25, when the output 19 is 0, outputs the index indicating the level of the value m' is newly outputted and in other case, the value of the 19 is directly outputted.</p> |
