服务质量参数 meaning in English

service quality parameter

Because mpeg video need more storage space ( though achievements in compression algorithms have decrease it to a reasonable degree ) , high transmission bandwidth , low transmission delay and delay jitter ( especially to real - time video ) . how to guarantee video transmission qos ( quality of service )
如何在宽带ip和atm网络上有效地传输mpeg视频，才能有效地保证视频传输的服务质量参数qos （如延迟、延迟变化等），以及用户终端表示的表现质量参数qop ，一直是近年来学术界研究的热点。