发明名称 |
DEVICE AND METHOD FOR PICTURE PROCESSING AND PRESENTATION MEDIUM |
摘要 |
PROBLEM TO BE SOLVED: To prevent quality deterioration of a decoded picture by change of a quantization step of a macro block caused by rate control. SOLUTION: A quantizer 2 quantizes picture data by a specified quantization step. A buffer 4 supplies a rate controller 11 with the first parameter by one screen for having the generated code amount of data that encode a picture coincide with the target code amount. A parameter detector 10 supplies the rate controller 11 with the second parameter corresponding to an activity of a macro block. An encoder control subsystem 12 supplies the rate controller with the third parameter corresponding to the target code amount. The rate controller 11 controls a quantized step based on the supplied first to third parameters. |
申请公布号 |
JPH11196424(A) |
申请公布日期 |
1999.07.21 |
申请号 |
JP19970359145 |
申请日期 |
1997.12.26 |
申请人 |
SONY CORP |
发明人 |
KAGA TAKASHI |
分类号 |
H04N19/50;H04N19/126;H04N19/134;H04N19/14;H04N19/142;H04N19/177;H04N19/196;H04N19/423;H04N19/503;H04N19/61;H04N19/625;H04N19/91 |
主分类号 |
H04N19/50 |
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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