| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a reproduction volume automatically adjustment method which automatically adjusts the reproduction volume of compressed and encoded voice data without processing PCM data. <P>SOLUTION: The reproduction volume automatically adjustment method has a step which stores a global gain G1, which is used for decoding the front frame in a memory; a step which computes a difference g between a global gain G2 obtained from the present frame and the global gain G1 read out from the memory; a step which compares the difference g with preliminarily set threshold values t1 and t2; a step which corrects the global gain G2 so that the difference g may be within a preliminarily set range, when the difference g is over the threshold value t1 or t2, and outputs it as the corrected global gain G2m; and a step which decodes the voice data of the present frame by using the corrected global gain G2m in case that the difference g is over the threshold value t1 or t2. <P>COPYRIGHT: (C)2009,JPO&INPIT |
