| 摘要 |
PROBLEM TO BE SOLVED: To enable efficient listening to a missed section during rewind playback for playing back a range traced by rewinding.SOLUTION: The operation stress of an operator during voice playback is estimated, and a playback section higher in stress than a predetermined level is stored. During rewind playback, a playback speed is changed according to whether a section is the stored playback section. Thus, as the playback section estimated high in operation stress and stored is determined to be a section not understood for meaning by the operator (missed section), easy listening can be secured for the operator by playing back at the same playback speed as that of normal playback before rewinding. As a part before or after the stored playback section (missed section) is determined to have been understood for meaning by the operator through one-time listening, this part is ignored by increasing the playback speed, thereby enabling efficient listening of the missed section while checking a context before and after.SELECTED DRAWING: Figure 4 |
