| 摘要 |
A speech codec (2), a voice activity detector (4, 7) and a memory (3) can be used for storing speech without pause periods, and for reproducing the original speech with the required pauses. Speech is first converted with an Analog-to-Digital converter into digital form, and encoded with an encoding device into frames. Speech frames containing active speech are stored in the memory (3) until the voice activity detector (4, 7) detects a pause. A start mark bit pattern and information as to the duration of the pause are then stored in the memory. When reproducing the speech, speech frames are read in succession from the memory (3), and they are decoded and converted into analog form. Between the speech frames pauses are inserted, their positions and durations being read from the memory. The invention is particularly appropriate for use in a telephone answering device incorporated in a digital radio telephone. <IMAGE> |
