发明名称 |
FIXED POINT INTEGER DIVISION TECHNIQUES FOR AC/DC PREDICTION IN VIDEO CODING DEVICES |
摘要 |
The disclosure describes a method for performing a fixed point calculation of a floating point operation (A // B) in a coding device, wherein A // B represents integer division of A divided by B rounded to a nearest integer. The method may comprise selecting an entry from a lookup table (LUT) having entries generated as an inverse function of an index B, wherein B defines a range of values that includes every DC scalar value and every quantization parameter associated with a coding standard, and calculating A // B for coding according to the coding standard based on values A, B1 and B2, wherein B1 and B2 comprise high and low portions of the selected entry of the LUT. The techniques may simplify digital signal processor (DSP) implementations of video coders, and are specifically useful for MPEG-4 coders and possibly others. |
申请公布号 |
WO2006128076(A3) |
申请公布日期 |
2007.02.01 |
申请号 |
WO2006US20637 |
申请日期 |
2006.05.25 |
申请人 |
QUALCOMM INCORPORATED;XIAO, SHU;DU, JUNCHEN;SHEN, TAO |
发明人 |
XIAO, SHU;DU, JUNCHEN;SHEN, TAO |
分类号 |
H04N7/26;G06F7/487;G06F7/535;H04N7/50 |
主分类号 |
H04N7/26 |
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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