发明名称 |
Method of changing bit rate by changing codeword of compressed image bit stream |
摘要 |
An apparatus and a method of changing a bit rate of a compressed image bit stream by changing a codeword so as to easily change the bit rate and reduce a changing loss. The apparatus for changing a bit rate, in which an input bit stream generated by an image compression encoding method is changed into an output bit stream having a desired bit rate, includes a changing codeword determiner which selects codewords to replace the codewords of the input bit stream, and a codeword changer which changes the codewords of the input bit stream into the codewords selected by the changing codeword determiner. The method and the apparatus can be applied to image services provided through the Internet and receiving apparatuses supporting the Personal Video Recorder (PVR) function. Particularly, the method of changing the bit rate of a compressed image bit stream changes the codewords of input transform coefficients so as to easily change the bit rate and reduce the changing loss.
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申请公布号 |
US2003026491(A1) |
申请公布日期 |
2003.02.06 |
申请号 |
US20020126981 |
申请日期 |
2002.04.22 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
HAHM CHEUL-HEE;JO JAE MOON |
分类号 |
H04N7/24;G06T9/00;H04N5/926;H04N7/26;H04N7/50;(IPC1-7):G06K9/36 |
主分类号 |
H04N7/24 |
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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