标题: | 数位机顶盒的影像品质研究:维持品质指标下改进测试生产力 Video Quality in Set-Top Box:Improving Test Productivity While Retaining Quality Index |
作者: | 刘百振 Pai-Chen Liu 林盈达 蔡文锦 Ying-Dar Lin Wen-Jiin Tsai 资讯学院资讯学程 |
关键字: | 机顶盒;机上盒;影像;品质;自动化;测试;多媒体;数位电视;量测;测试方法;数位家庭;set-top box;STB;video;quality;automated test;test;multimedia;digital TV;measurement;test methodology;digital home |
公开日期: | 2005 |
摘要: | 在数位家庭与多媒体产品中,数位机顶盒扮演着极为重要的沟通桥梁,其中让使用者能直接感受到产品性能优劣的第一印象,莫过于影像与声音的品质。然而一般影像测试时,需要使用各种不同的测试图形,所以我们依据影像品质指标,提出一种组合式图形测试方法:把二十四种个别单一的图形,构成一种组合式图形。另外,在数位机顶盒系统品质测试中,需要测试影音讯号输出品质、数位压缩的相容性与传输网路所造成的影响,若要全部测试则高达329,726,592项,故我们使用一台电脑控制了影音讯号源、数位压缩设备、传输网路、影像声音品质分析仪,实作了自动化测试系统,此一系统可以大大地缩短测试时间。综观上述之研究其优点:降低测试复杂性、缩短测试周期、提高产品竞争力进而大幅提升测试生产力。 Among many multimedia products, digital set-top box plays a key role as consumer promise equipment. The key performance index for a set-top box appears to be its video and audio quality. The video quality is benchmarked by many different types of video patterns. In this thesis, we propose a Video Combination Technique (VCT) to integrate twenty-four video sources into a single one. Thus, the benefits of VCT include lower test complexity, lower test cycles and cost saving. From the system quality point of view, there are testing network transmission layer, compression layer and video/audio output signal layer. All the tests are sum up to be 329,726,592 items. Therefore, we implement an automated test measurement system (ATMS) to save the test cycles and time. So set-top box manufacturing cost is lower and productivity is improved. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT008967571 http://hdl.handle.net/11536/80102 |
显示于类别: | Thesis |
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