It includes the mepg2 demodulation module , the numeral regards the audio frequency coder and the conditional access module and so on 它主要包括mepg2解调模块、数字视音频编码器和条件接收模块等。
A card chinese red army soldier 8 groups video frequencies , do not have audio frequency , the h . 264 compression way , the single system supports 24 groups 一卡八路8路视频无音频， h . 264压缩方式，单系统支持24路。
Specification for general requirements for equipment for use in aircraft - electrical equipment - electromagnetic interference at radio and audio frequencies 飞机设备的一般要求规范.第4部分:电气设备.第2节:射频和音频电磁干扰
Thus , theoretically speaking , the recorded audio frequency only corresponds to 22 . 05 khz - which would place it very close to the upper listening limit 理论上，数据抓取的频率应该相当于22 . 05khz ，非常接近于我们听力接收的上限。
So , audio collecting and processing card can sample audio frequency range from 50 hz to 6khz with g . 722 . 1 audio coding 采用了g . 722 . 1这种高质量、低码率的宽带语音编码,使采集卡能够完成对50hz到6khz之间连续变化的音频进行采集。
G . 723 . 1 arithmetic is a compressing arithmetic that proposed by itu - t and applied in speech and other audio frequency signals of low velocity multimedia G . 723 . 1算法是itu - t建议的应用于低速率多媒体服务中语音或其它音频信号的压缩算法。
The experimental results indicate the circuit is credible and the program runs well . the dpll based on dsp is competent for ultra - audio frequency - tracking 实验结果证明基于dsp的dpll完全可以胜任超音频的频率跟踪，系统硬件电路可靠，程序运行良好。
Only there is breakthrough in audio frequency signal recognition based on physics characteristic , more and deeper research of sound index could be done 只有在基于音频物理特征的识别技术方面有所突破,才可能在更高层次的基于知识辅助的音频检索方面做出更深入地研究。
Suitable for transmitting 1ghz and following radio frequency signal , spread the digital signal under audio frequency 150khz and following simulation signal 2048kbits frequently 适用于传输1ghz及以下的射频信号，传频音频150khz及以下的模拟信号2048kbits以下的数字信号。
Main products of the company include power transformers , power adapters , cell - phone chargers , audio frequency transformers and inductive coils , with an annual output of up to 15 million sets 主要产品有电源变压器、电源适配器、手机充电器、音频变压器和电感线圈，年产量可达1500万只。
