论文部分内容阅读
在传统的话音激话开关语音准双工系统中,由于语音空隙的存在,以及收发语音的相对电平变化,总存在部分首尾语音截取的现象和可察觉的收发转换。本文详细分析了语音准双工工作模式,提出了一种以收发状态混合检测为基础的收发开关软转换,短时话空消除的语音准双工实现新方法。这种方法消除了通话双向侧音联络,而便于微处理器实现。在单片机语音置乱系统中试验表明,它具有收发转换可靠,插话灵活,用户感觉小的显著效果。
In the conventional speech voice switch voice quasi-duplex system, due to the existence of voice gaps, and the relative level of the received and transmitted voice, there is always a part of the phenomenon of tail-end voice interception and perceptible transcoding. This paper analyzes the speech quasi-duplex working mode in detail, and proposes a new method of speech quasi-duplex realization of soft switch and short speech null cancellation based on the mixed state detection of the receiving and sending states. This method eliminates the bidirectional sidetone connection of the call, which is convenient for the microprocessor to implement. In the SCM voice scramble system tests show that it has a transceiver to send and receive reliable, chipped flexible, the user feels a small significant effect.