Recommendation ITU-T P.1201.1 specifies the algorithmic model for the lower resolution/ (LR, formerly referred to as low-bitrate, LBR) application area of P.1201. The P.1201 series of documents specifies models for monitoring the audio, video and audiovisual quality of IP-based video services based on packet-header information. The respective ITU-T work item has formerly been referred to as P.NAMS (parametric non-intrusive assessment of audiovisual media streaming quality). The lower resolution application area of the P.1201.1 part of P.1201 can be applied to the monitoring of performance and quality of experience (QoE) of video services such as Mobile TV. The algorithm for the higher resolution (HR) case is specified in P.1201.2. See P.1201 for details and respective application ranges and limitations of use.