发明授权
- 专利标题： Selection of quantization step size in accordance with predicted quantization noise
- 专利标题（中）： 根据预测的量化噪声选择量化步长
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申请号： US410721申请日： 1995-03-27
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公开(公告)号： US5654760A公开(公告)日： 1997-08-05
- 发明人: Tomoyuki Ohtsuki
- 申请人： Tomoyuki Ohtsuki
- 申请人地址： JPX Tokyo
- 专利权人： Sony Corporation
- 当前专利权人： Sony Corporation
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX6-084088 19940330
- 主分类号： G06T9/00
- IPC分类号： G06T9/00 ; H04N7/26 ; H04N7/30 ; H04N7/50 ; H04N7/12 ; H04N11/02 ; H04N11/04
摘要：
A video image encoder estimates a quantization noise curve which will result from quantizing a coefficient data block and uses the estimated quantization noise curve and a specified minimum noise value to select the quantization step size actually used to quantize the coefficient data block. The quantization step size is also selected as a function of transmission buffer occupancy so as to limit the amount of encoded data to a predetermined rate.
公开/授权文献
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