发明名称 |
Bildkodierungseinrichtung mit analogem Verarbeitungssystem |
摘要 |
<p>An image sensing element for providing a series of voltage signals corresponding to a two-dimensional image, a two-dimensional analog DCT (discrete cosine transform) circuit for performing a two-dimensional DCT on the voltage signal series from the image sensing element in pixel blocks, and a quantization circuit for quantizing a result of the DCT are provided. The two-dimensional analog DCT circuit is formed of a row of analog sum-of-products arithmetic units for one-dimensional DCT and an analog memory array for matrix transposition. The quantization circuit converts a voltage representing a result of the DCT carried out by the two-dimensional analog DCT circuit into a digital value according to a given quantization coefficient Q = 2 N · S (1 ‰ S < 2) wherein a voltage S·Vref that is S times greater than a fixed voltage Vref serves as a reference voltage, and performs a process of right-shifting the digital value N bits in order to provide a quantized digital value.</p> |
申请公布号 |
DE69738360(T2) |
申请公布日期 |
2008.04.10 |
申请号 |
DE1997638360T |
申请日期 |
1997.10.01 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. |
发明人 |
MATSUZAWA, AKIRA;KAWAHITO, SHOJI;TADOKORO, YOSHIAKI |
分类号 |
H04N7/12;G06T9/00;H03M7/30;H04N1/41;H04N19/102;H04N19/136;H04N19/196;H04N19/42;H04N19/423;H04N19/60;H04N19/625;H04N19/85 |
主分类号 |
H04N7/12 |
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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