Thirdly dct is implemented using chen fast dct algorithm . we transform float - point arithmetic into fixed - point arithmetic , which meeting the precision requirements of the ieee 1180 standard , to accord with fixed - point c6201 dsps 隨后在dct變換編碼中,采用chen快速dct算法,在保證idct精度符合ieee1180標(biāo)準(zhǔn)條件下,將浮點(diǎn)dct系數(shù)轉(zhuǎn)化為與c6201定點(diǎn)dsps運(yùn)算單元相適應(yīng)的定點(diǎn)系數(shù)。
百科解釋
In computing, a fixed-point number representation is a real data type for a number that has a fixed number of digits after (and sometimes also before) the radix point (after the decimal point '.' in English decimal notation).