Subjective testing methodology in MPEG video verification

摘要: The development of new video processing, displays, and modes dissemination usage enables a variety moving picture applications intended for mobile desktop devices as well the more conventional platforms. These include multimedia traditional require novel lighting environments bit rates previously unplumbed in Moving Picture Experts Group (MPEG) compression. migration to poses methodological challenge testers quality. Both viewing environment display characteristics differ dramatically from those used well-established subjective testing methods television. MPEG Test Committee has adapted television-centric methodology environments. adaptations that are examined here include: (1) progressive scan pictures Common Intermediate Format (CIF at 352x288 pixel/frame) Quarter CIF (QCIF 176x144 other, larger requires ways subjects including different distances altered ambient lighting. (2) advent varieties technologies suggests there is need characterizing them assure results do not depend strongly on display. (3) use non-parametric statistical tests test data analysis. In these appear provide rigorous confidence statements line with experience than provided by classical parametric tests. issues have been addressed recent test. Some reviewed; they suggest long-established TV capable providing practical reliable measures quality generation technology.