| 摘要 |
<p>PURPOSE:To compress a band area, and to improve transmission efficiency, by performing coding after adding orthogonal transformation at the time of coding and transmitting a picture signal, and eliminating a specified isolated significant factor out of the significant factors after the orthogonal transformation, from the object of the coding. CONSTITUTION:To a conventional general picture signal processor, an isolated significant factor eliminator 31 is added. A RAM is built in the isolated significant factor eliminator 31, and all of the block data shown in figure are stored transiently in the RAM, and based on the stored data, one significant factor at a high frequency side out of the significant factors on which two-dimensional orthogonal transformation is applied in each block, is extracted, and it is decided whether all of the stored data within a radius (r) are factors 0 or not, by pattern matching. An isolated significant factor 41 decided in such a way, is eliminated from the object of the coding at an entropy coder 14. And at the entropy coder 14, the coding is performed on the data not including such isolated significant factor. A coding signal S'c obtained in such a way, becomes the one in which the band area is highly compressed than ever.</p> |
