It has been found that this method can obtain better error resilient performance and can be applied in video transmission over Public Switch Telephone Network (PSTN) and wireless channel.
实验证明，此方法可取得较好的容错性能，可应用于公共交换电话网(PSTN)和无线信道上的视频传输。
China Unicom under such background began to set up IP Public Switch Telephone Network nationwide, and has rapidly covered all the IP PSTN in the country.
在这样的背景下，中国联通开始在全国范围建设IP电话网，并很快形成了覆盖全国的IP电话网络。
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