本书综合介绍在服务提供方面的协议信号传输、媒体传输方法、参考拓扑考虑因素和语音质量测试。
The book introduced the integrated services agreement with the signal transmission, the method of transmission media, reference topology considerations and voice quality tests.
在近一个小时的连续呼叫测试中，语音质量良好，信号稳定，而EVDO的在线视频播放，数据平滑稳定。
During nearly one hour of continuous call testing, the voice service demonstrated good quality and stable signals, while the EVDO data service smoothly and steadily play online videos.
主观和客观听力测试表明，算法的改进前后的合成语音质量没有感性差别。
Subjective and objective hearing test indicates that the reconstructed speech quality has no perceptual difference from the original one.
该算法可以提供良好的合成语音质量，DRT测试结果达到88.55分。
This speech coder achieves good quality of speech and the DRT score is 88.55.
用平均分段信噪比和感知语音质量评价(PESQ)测试，改进算法编码质量接近于g。
Testing with the average segment SNR and Perceptual Evaluation of Speech Quality (PESQ), the improved algorithm is close to g.
测试结果表明所设计的语音编解码器能够实时完成四路语音记录，具有较高的恢复语音质量，性能指标达到设计要求。
Experiments proved that the codec can recode four channels speech in real time and the quality of the recovered speech is satisfying. And the design intention is realized.
测试结果表明所设计的语音编解码器能够实时完成四路语音记录，具有较高的恢复语音质量，性能指标达到设计要求。
Experiments proved that the codec can recode four channels speech in real time and the quality of the recovered speech is satisfying. And the design intention is realized.
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