This paper presents the results of a subjective quality assessment of a multilayer video coding configuration in which Low Complexity Enhancement Video Coding (LCEVC) is applied as an enhancement layer on top of a Versatile Video Coding (VVC) base layer. The evaluation follows the same test methodology and conditions previously defined for MPEG multilayer video coding assessments, with the LCEVC enhancement layer encoded using version 8.1 of the LCEVC Test Model (LTM). The test compares reconstructed UHD output generated from an HD VVC base layer with LCEVC enhancement against two reference cases: upsampled VVC base layer decoding and multilayer VVC (ML-VVC). Two operating points are considered, corresponding to enhancement layers representing approximately 10% and 50% of the total bitrate. Subjective assessment was conducted using the Degradation Category Rating (DCR) methodology with twenty five participants, across a dataset comprising fifteen SDR and HDR sequences. The reported results include Mean Opinion Scores (MOS) with associated 95% confidence intervals, enabling comparison of perceptual quality across coding approaches and operating points within the defined test scope.

翻译：本文介绍了一种多层视频编码配置的主观质量评估结果，该配置将低复杂度增强视频编码（LCEVC）作为增强层应用于通用视频编码（VVC）基层之上。评估遵循先前为MPEG多层视频编码评估定义的相同测试方法和条件，其中LCEVC增强层使用LCEVC测试模型（LTM）8.1版进行编码。测试将高清VVC基层结合LCEVC增强层重建生成的超高清输出，与两种参考情况进行了比较：上采样的VVC基层解码和多层VVC（ML-VVC）。考虑了两个工作点，分别对应约占总码率10%和50%的增强层。主观评估采用退化类别评分（DCR）方法，由25名参与者对包含15条SDR和HDR序列的数据集进行评价。报告结果包括平均意见得分（MOS）及其相关的95%置信区间，从而能够在定义的测试范围内比较不同编码方法及工作点的感知质量。