发明名称 |
Bit-rate control method and apparatus for normalizing visual quality |
摘要 |
A scalable video codec includes an encoder that encodes an original moving picture; a rate control unit that allocates an optimal amount of bits for each coding unit based on a bit-rate desired by a user; a pre-decoder that receives a bit-stream and extracts a bit-stream having an appropriate amount of bits; and a decoder that decodes image sequences of the moving picture from the extracted bit-stream, so as to reconstruct the original moving picture. In particular, the present invention focuses on the operation performed in the rate control unit 340 . The rate control unit operates a definition step of a bit-rate function available for use in the predecoder, a pre-summation step to thereby obtain the uniform visual quality, an approximation to determine the distortion function, and a normalization step to allow the total allocated bit-rates to be equal to a target bit-rate.
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申请公布号 |
US2005084015(A1) |
申请公布日期 |
2005.04.21 |
申请号 |
US20040968491 |
申请日期 |
2004.10.20 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
HAN WOO-JIN;LEE BAE-KEUN;HA HO-JIN |
分类号 |
H04N7/12;H04N7/173;H04N7/24;H04N7/26;(IPC1-7):H04N7/12 |
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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