Patent ID: 8370150

Claim:
A text information presentation device comprising: a memory storing time information on a text string; a text information input unit accepting input of the text string; a text string buffer that stores the text string and outputs an update notification signal when the text string is input to the text information input unit; a standard speech-synthesis length calculating unit that reads the text string stored in the text string buffer and calculates time required to pronounce the text string at a given speed to output the time as a readout duration signal when receiving the update notification signal; a control unit that calculates a readout speed ratio on a basis of the readout duration signal output from the standard speech-synthesis length calculating unit, time information on a text string stored in the text string buffer, and the time information on the text string stored in the memory, and output the readout speed ratio as a readout speed ratio signal; and a speech synthesizing unit that issues a readout request to the text string buffer, and speech-synthesizes a text string input from the text string buffer on a basis of the readout speed ratio signal, wherein the memory further stores a history of a given number of readout speed ratio signals, and wherein the control unit calculates a readout speed ratio signal on a basis of a readout speed ratio signal calculated on a basis of the readout duration signal input from the standard speech-synthesis length calculating unit, the time information corresponding to the readout duration signal and having been read from the text string buffer, and the time information on the text string stored in the memory; and the history of the given number of the readout speed ratio signals stored in the memory.