公开(公告)号：EP1727351A4

公开(公告)日：2015-01-07

申请号：EP05710210

申请日：2005-02-15

Applicant: TOA CORP

Inventor： TABUCHI HIROSHI ,  TAGUCHI AKIRA ,  SHIMAUCHI KAZUHIRO ,  MOROHASHI TOSHIO

IPC: H04N19/625 ,  H04N1/41

CPC classification number: H04N19/59 ,  H04N19/117 ,  H04N19/124 ,  H04N19/14 ,  H04N19/17

Abstract: To improve the data compression ratio in the data compression/decompression method utilizing the down-sampling process. Image data in a DS area division unit (130) is divided into a plenty of DS areas and DS areas which are not important are converted into contracted data of the block size by down-sampling in a down-sampling unit (131). A relocation unit (132) allocates two or more contracted data in one DS area, inserts file data into the other portion in the DS area, and removes the DS area where no contracted data is allocated, thereby reducing the entire image size. The image data thus contracted is inputted into a JPEG encoder (14) and subjected to a DCT process and a quantization process for each block. When performing restoration, decompression is performed by the JPEG decoder and the original location is restored. As for the contracted data, interpolation is performed to restore the image data.

公开(公告)号：JP2005269620A

公开(公告)日：2005-09-29

申请号：JP2005037264

申请日：2005-02-15

Applicant: Toa Corp ,  ティーオーエー株式会社

Inventor： TAGUCHI AKIRA ,  SHIMAUCHI KAZUHIRO ,  TABUCHI HIROSHI ,  MOROHASHI TOSHIO

IPC: H04N1/41 ,  H03M7/30

Abstract: PROBLEM TO BE SOLVED: To improve a data compression ratio in a data compressing/expanding method utilizing a down sampling process. SOLUTION: An image data is divided into many DS areas in a DS area dividing portion 130, and an unimportant DS area is converted into a reduced data consisting of a block size by the down sampling at a down sampling portion 131. Rearranging portion 132 arranges reduced data of 2 or more in one DS area, inserts a file data into other parts in the DS area, and reduces a size of the entire image by eliminating the DS area where the reduced data is not arranged. The image data reduced like this is input in a JPEG encoder 14, and a DCT processing and a quantization processing or the like each block are conducted. The image data is restored to its original arrangement at a restoration time after it is expansion-processed by a JPEG decoder, the reduced data is interpolation-processed, and the image data is restored. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：利用下采样处理来提高数据压缩/扩展方法中的数据压缩比。 解决方案：图像数据在DS区域划分部分130中被划分成许多DS区域，并且不重要的DS区域通过在下采样部分131处的下采样被转换成由块大小组成的简化数据。重新排列 部分132在一个DS区域中排列2或更多的缩减数据，将文件数据插入DS区域中的其他部分，并通过消除未排列缩减数据的DS区域来减小整个图像的大小。 这样减少的图像数据被输入到JPEG编码器14中，并且进行DCT处理和量化处理等每个块。 在由JPEG解码器进行扩展处理之后的恢复时间，将图像数据恢复到其原始布置，缩小的数据被内插处理，并且图像数据被恢复。 版权所有（C）2005，JPO＆NCIPI