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在研究国际图像压缩编码系列标准和ＩＳＤＮ多媒体通信传输性能的基础上，选用专用芯片实现了ＩＴＵ－ＴＨ．３２０标准的多媒体可视电话终端．由于采用了前后处理等多种措施，图像主观质量良好．
On the basis of studying the international image compression coding standard and ISDN multimedia communication transmission performance, the ITU-TH is selected by using a dedicated chip. 320 standard multimedia video phone terminal. As a result of a variety of measures before and after the treatment, the subjective image quality is good.