发明授权
US5369439A Orthogonal transform encoder using DC component to control quantization
step size
失效
使用直流分量的正交变换编码器来控制量化步长
- 专利标题： Orthogonal transform encoder using DC component to control quantization step size
- 专利标题（中）： 使用直流分量的正交变换编码器来控制量化步长
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申请号： US955829申请日： 1992-10-02
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公开(公告)号： US5369439A公开(公告)日： 1994-11-29
- 发明人: Toyohiko Matsuda , Masakazu Nishino , Shigeru Awamoto
- 申请人： Toyohiko Matsuda , Masakazu Nishino , Shigeru Awamoto
- 申请人地址： JPX Kadoma
- 专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人： Matsushita Electric Industrial Co., Ltd.
- 当前专利权人地址： JPX Kadoma
- 优先权： JPX3-255030 19911002; JPX3-275162 19911023
- 主分类号： G06T9/00
- IPC分类号： G06T9/00 ; H04N7/26 ; H04N7/30 ; H04N7/133
摘要：
According to orthogonal transformation coefficients obtained through orthogonal transformation, the degree of influence on visual sensation is detected. Depending on the degree of influence on visual sensation, a quantization step size is controlled so as to assign a greater amount of codes to each block of which image quality deterioration is conspicuous and a smaller amount of codes to each block of which image quality deterioration is less conspicuous.
公开/授权文献
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