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 随后在dct变换编码中,采用chen快速dct算法,在保证idct精度符合ieee1180标准条件下,将浮点dct系数转化为与c6201定点dsps运算单元相适应的定点系数。
百科解释
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).