| 摘要 |
PURPOSE:To provide the speech encoding device which obtains a reproduced speech of high quality irrelevantly to a bit rate. CONSTITUTION:This device is equipped with a 1st code book 11 which contains a singular value vector group and a 2nd code book 12 which contains a residue vector group, and the difference between the output of a multiplier 13 and a speech conversion vector obtained by the unitary conversion of a unitary converting circuit 14 is found and stored in an error evaluating circuit 16. The error evaluating circuit 16 searches for a combination of the singular value vector and residue vector corresponding to the least value among differences obtained as to all combinations of the sigular value vectors and residue vectors in the two code books. |
