IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0246966
(1999-02-09)
|
우선권정보 |
JP-0201260 (1990-07-31); JP-0213378 (1990-08-10); JP-0259484 (1990-09-28); JP-0332919 (1990-11-29) |
발명자
/ 주소 |
- Fukuda, Masahiro
- Noda, Tsugio
- Chiba, Hirotaka
- Murashita, Kimitaka
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
34 |
초록
▼
The present invention relates to an image data reconstructing apparatus for reconstructing an original image by dividing image data into a plurality of blocks each comprising N×N picture elements, performing two-dimensional orthogonal transform on each of the blocks, quantizing and encoding the resu
The present invention relates to an image data reconstructing apparatus for reconstructing an original image by dividing image data into a plurality of blocks each comprising N×N picture elements, performing two-dimensional orthogonal transform on each of the blocks, quantizing and encoding the result of the two-dimensional orthogonal transform, decoding the encoded result, dequantizing and two-dimensional inverse orthogonal transforming the above result, wherein an operation associated with the multiplication is skipped if a multiplication by zero is detected when two-dimensional inverse orthogonal transform is performed. Before performing dequantization, two block volume of buffer is provided before or after performing two-dimensional inverse orthogonal transform for executing a pipeline process. Furthermore, two-dimensional inverse orthogonal transform is performed by repeating two times a process of one-dimensional inverse orthogonal transform and matrix transposition, thus the matrix transposition being performed as the result of one-dimensional inverse orthogonal transform which is stored in buffer.
대표청구항
▼
The present invention relates to an image data reconstructing apparatus for reconstructing an original image by dividing image data into a plurality of blocks each comprising N×N picture elements, performing two-dimensional orthogonal transform on each of the blocks, quantizing and encoding the resu
The present invention relates to an image data reconstructing apparatus for reconstructing an original image by dividing image data into a plurality of blocks each comprising N×N picture elements, performing two-dimensional orthogonal transform on each of the blocks, quantizing and encoding the result of the two-dimensional orthogonal transform, decoding the encoded result, dequantizing and two-dimensional inverse orthogonal transforming the above result, wherein an operation associated with the multiplication is skipped if a multiplication by zero is detected when two-dimensional inverse orthogonal transform is performed. Before performing dequantization, two block volume of buffer is provided before or after performing two-dimensional inverse orthogonal transform for executing a pipeline process. Furthermore, two-dimensional inverse orthogonal transform is performed by repeating two times a process of one-dimensional inverse orthogonal transform and matrix transposition, thus the matrix transposition being performed as the result of one-dimensional inverse orthogonal transform which is stored in buffer. US-5268754, 19931200, Van de Capelle et al., 358/527; US-5384901, 19950100, Glassner et al., 345/591; US-5668890, 19970900, Winkelman, 382/167; US-5677967, 19971000, Pariser, 382/167; US-5724442, 19980300, Ogatsu et al., 382/167; US-5724443, 19980300, Nishikawa, 382/167; US-5754184, 19980500, Ring et al., 345/604; US-6091518, 20000700, Anabuki, 358/500
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