发明名称 |
Picture data compression device and red data detection device |
摘要 |
<p>In a picture data compressing device, picture data is divided by a blocking circuit (1) into plural blocks each consisting of a pre-set number of pixels and shuffled by a shuffling circuit (2). The blocked and shuffled data is transformed by a DCT circuit (3) into data in the frequency domain and re-quantized by a quantization circuit (4) for compressing the picture data. A red detector (6) decides whether or not a block from the shuffling circuit (2) is a red-based block. If the red detector (6) finds the block to be a red-based block, a controller (7) controls the quantization circuit (4) so that the quantization step of the quantization circuit (4) will become finer. The picture data of the red-based block susceptible to block distortion may be quantized with a finer quantization step for improving reproducibility and alleviating block distortion. <IMAGE></p> |
申请公布号 |
AU686645(B2) |
申请公布日期 |
1998.02.12 |
申请号 |
AU19940072852 |
申请日期 |
1994.09.06 |
申请人 |
SONY CORPORATION |
发明人 |
KIMINORI SUGISAKI;JASON FISCHL;NOBUAKI IZUMI;NAOFUMI YANAGIHARA;YUKA KIYAMA |
分类号 |
H04N5/92;G06T9/00;H04N9/804;H04N9/808;H04N11/04;H04N19/12;H04N19/126;H04N19/136;H04N19/137;H04N19/14;H04N19/176;H04N19/186;H04N19/189;H04N19/196;H04N19/42;H04N19/51;H04N19/60;H04N19/625;H04N19/65;H04N19/85;H04N19/86;H04N19/88;H04N19/91;(IPC1-7):H04N7/133 |
主分类号 |
H04N5/92 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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