Audio reproducing apparatus having voice speed converting functi

Details Audio reproducing apparatus having voice speed converting functi Audio reproducing apparatus having voice speed converting functi

1996-06-28

1998-09-15

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704215, 704208, 704211, 704503, G10L 302

Patent

active

058094547

ABSTRACT:
A audio reproducing apparatus includes an audio decoder and a voice speed converting unit. The audio decoder decodes an audio data stream to produce an audio signal. The voice speed converting unit converts the audio signal in such a manner that when a bit rate is higher than a normal bit rate, a pitch of a reproduced sound interval is the same as the pitch of the sound interval in a normal playback mode and a voice speed in the reproduced sound interval approaches a voice speed in a sound interval in the normal playback mode. The voice speed converting unit further performs voice speed conversion on the audio signal in such a manner that when the bit rate is lower than the normal bit rate, the sound interval is not noticeably interrupted.

REFERENCES:
Ikezawa et al., "A Method of Absorbing Temporal Enlargement of Speech Lengths in the Voice Speed Converting System for Elderly", Technical Report of IEICE, pp. 49-56, No Date.
"The Voice Speed Conversion Technique Progressing Toward Phase of Practical Use and Applied as the Basic Function of Audio Output Equipment" published by Nikkei Electronics on Nov. 21, 1994.

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