【摘要】 流媒体业务的应用越来越广泛,QoS指标和用户感知QoE对应关系的重要性也日益显现,然而现今的映射模型过于单一,不能综合有效地考虑各种QoS指标的影响,也未考虑业务使用时客观指标和主观感知的随机性和模糊性。将云模型引入到系统评价中,利用一维云模型对单个QoS指标进行多级描述,在此基础上,建立各级评语对应的多维标准云以及描述整体业务感知的多维指标云,比较实际云和标准云相似度得出评价结果。实例验证表明,该映射模型能够实现单个QoS指标到QoE的映射,并在此基础上实现多指标综合映射,直观准确地反映了各指标对用户感知的影响。更多还原

【Abstract】 As the streaming media services are widely used,the importance of the relation between QoS indexes and user perception QoE is becoming increasingly obvious.Nevertheless,today’s mapping models have not taken various indexes into consideration and ignore fuzziness and randomness in both objective indexes and subjective user perception.A new evaluation model based on cloud model is introduced and each QoS index is described using one-dimension cloud,and then the corresponding multidimensional standard judging cloud and multidimensional index cloud of system are established.The results are obtained by comparing the similarity degree between standard clouds and index cloud of system.The experiment shows that this model can reflect the impact of each index on users’ perception with one-dimension and multidimensional index correlation model.更多还原