发明名称 |
BIT-RATE CONTROL METHOD AND APPARATUS FOR NORMALIZING VISUAL QUALITY |
摘要 |
<p>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.</p> |
申请公布号 |
EP1680922(A1) |
申请公布日期 |
2006.07.19 |
申请号 |
EP20040793485 |
申请日期 |
2004.10.14 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
HAN, WOO-JIN;LEE, BAE-KEUN;HA, HO-JIN |
分类号 |
H04N19/94;H04N7/12;H04N7/173;H04N7/24;(IPC1-7):H04N7/24 |
主分类号 |
H04N19/94 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|