voice modulation

This paper develops a voice compress algorithm-SB-ADPCM ( Sub Band-adaptive Differential Pulse Code Modulation ).

论述了计算机数字录音技术中的语音压缩算法 — SB-ADPCM ( Sub Band -AdaptiveDifferentialPulseCodeModulation ) 方法.

CVSD ( Continuous Variable Slope Delta Modulation ) voice coding enables operation at high bit-error rates.

连续可变斜率增量调制的语音编码可以在高误码率的情况下正常工作.

The system can provide 30 or 60 delta modulation digital voice channels.

系统能提供30或60增量调制音频信道.

The soft modulation of her voice soothed the infant.

她柔和的声调使婴儿安静了.

The transmitting channel implements the voice recording, spectrum spreading and BPSK modulation while the receiving channel implements the BPSK demodulation, code dispreading and voice broadcasting.

该系统是双通道的，发送通道实现话音的录入、扩频和BPSK调制发送，接收通道实现话音的BPSK解调接收、解扩和播放。

However, the modulation-demodulation of ultraviolet and voice transmission are the key technologies.

然而, 紫外光通信的 调制解调技术 以及语音传输是整个系统的关键难点.