SPEECH ENCODING DEVICE AND DECODING DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce memory capacity by using a vector series outputted from an oscillator as fixed vectors or probabilistic vectors. SOLUTION: This device is equipped with a seed storage part 11 which stores seeds, an oscillator 12 which outputs different vector series corresponding to the values of the seeds stored in the seed storage part 11, and an LPC synthesizing filter part 13 which inputs the vector series as sound source vectors and performs LPC synthesis to obtain a synthesized sound. This is obtained by replacing the fixed vector readout part and fixed code book of a conventional CELP type speech encoding device or the fixed vector readout part and fixed code book of a CELP type speech decoding device with the oscillator 12 and seed storage part 11. Then the oscillator 12 outputs different vector series corresponding to the values of inputted seeds. Further, the LPC synthesizing filter part 13 performs the LPC synthesis of inputted sound source vectors 15 and outputs a synthesized sound 16.