: Refers to the Quantization Parameter or Quality level (Quality 80). In compression research, data is often tested at various "Rate-Points" (e.g., Q10 to Q95) to measure the trade-off between file size and visual fidelity.
: The file is likely a test bitstream for G-PCC (Geometry-based Point Cloud Compression) or V-PCC (Video-based Point Cloud Compression). The "Common Test Conditions" (CTC) papers for MPEG-I (ISO/IEC 23090-9) often use these specific building models. ApartmentBuilding-Build09-pc-Q80-Compressed.7z
: Stands for Point Cloud , indicating the data is a set of vertices in 3D space. : Refers to the Quantization Parameter or Quality