presentation timing of the closed caption to the timing of the head of the agreed speech for example the presentation timing of the closed caption shown in fig4 is corrected to a presentation timing as shown in fig5 in the second compensation mode the closed caption signal correction unit 18 and the closed caption synthesis unit 19 decreases the deviation quantity included in the closed caption sentence every morpheme to correct the closed caption signal to approximate the speech timing of the agreed morpheme to the presentation timing of each morpheme for example the presentation timing of the closed caption shown in fig4 is corrected to the presentation timing as shown in fig6 in the third compensation mode the closed caption signal correction unit 18 and the closed caption synthesis unit 19 correct the closed caption signal to set the presentation timing of the closed caption to a timing deviated by a given time from the timing of the head of the agreed speech for example the presentation timing of the closed caption is again set to a timing further deviated by a give time from the state of fig5 in this time the given time is determined according to a predefined rule such as u201c present only a noun at three seconds late u201d in the fourth compensation mode the closed caption signal correction unit 18 and the closed caption synthesis.