l be equal to 1. When frame packing_arrangement_type is equal to 5, it is a requirement of bitstream conformance that quincunx_sampling_flag shall be equal to 0. NOTE - For any chroma format (4:2:0, 4:2:2, or 4:4:4), the luma plane and each chroma plane is quincunx sampled as illustrated in Figure D-1 when quincunx_sampling_flag is equal to 1. content_interpretation_type indicates the intended interpretation of the constituent frames as specified in Table D-9. Values of content_interpretation_type that do not appear in Table D-9 are reserved for future specification by ITU-T ISO/IEC. For each specified frame packing arrangement scheme, there are two constituent frames that are referred to as frame 0 and frame 1. Rec. ITU-T H.264 (01/2012) Table D-9 - Definition of content_interpretation_type Value Interpretation Unspecified relationship between the frame packed constituent frames Indicates that the two constituent frames form the left and right views of a stereo view scene, with frame 0 being associated with the left view and frame 1 being associated with the right view Indicates that the two constituent frames form the right and left views of a stereo view scene, with frame 0 being associated with the right view and frame 1 being associated with the left view NOTE 7 - The value 2 for content_interpretation_type is not expected to be prevalent in industry use of this SEI message. However, the value was specified herein for purposes of completeness. spatial_flipping_flag equal to 1, when frame_packing_arrangement_typ is equal to 3 or 4, indicates that one of the two constituent frames is spatially flipped relative to its intended orientation for display or other such purposes. When frame_packing_arrangement_type is equal to 3 or 4 and spatial_flipping_flag is equal to 1, the type of spatial flipping that is indicated is as follows: If rame_packing_arrangement_typeis equal to 3, the indicated spatial flipping is horizontal flipping. Otherwise (frame_packing_arrangement_ty is equal to 4), the indicated spatial flipp