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615998d1ca83294bf09c70d936c0b900 | 103 420 | 4.4 Decoder interface | The decoder shall provide an interface for the OBA comprising object audio essence audio data and time-stamped metadata updates for the corresponding object properties. At the interface the decoder shall provide the decoded per-object metadata in time stamped updates. For each update the decoder shall provide the data ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5 Object audio metadata | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.1 Introduction | OAMD is the coded bitstream representation of the metadata for OBA processing. The OAMD bitstream is carried inside an EMDF container, specified in ETSI TS 102 366 [1]. The present document specifies: • the general OBA content description in clause 5.1a • the object properties in clause 5.2 • the timing concept within ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.1a OBA content description | The top-level object_audio_metadata_payload and the contained program_assignment contain several bitstream elements that carry general information about the transmitted OBA content such as: • version of the OAMD payload syntax • total number of objects • type of objects (e.g. dynamic objects or bed instances) • program... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2 Object properties | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.1 Position | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.1.1 Introduction | The position property is the data that is provided as position_update at the decoder interface. The position property of an object is specified differently for the following cases: 1) The object is not contained in a bed and b_object_use_screen_ref=0; position property is specified in clause 5.2.1.2. ETSI ETSI TS 103 4... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.1.2 Position in room-anchored coordinates | The decoder shall set anchor = ROOM. Let C = pos3D_X; pos3D_Y; pos3D_Z. If b_object_distance_specified is false, the position PRoom; Room; Room of the object shall be determined as P = C. NOTE 1: In this case the object is located inside the room. If b_object_distance_specified is true, the position P of the objec... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.1.3 Position in screen-anchored coordinates | The decoder shall set anchor = SCREEN. The position P Screen; Screen; Screen shall be determined as P pos3D_X; pos3D_Y; pos3D_Z The decoder shall set 3D_coordinates at the decoder interface to the three dimensional coordinates Screen; Screen; Screen of the position P. Position P together with screen_factor... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.1.4 Position in speaker-anchored coordinates | The decoder shall set anchor = SPEAKER. For a bed the coordinate of each contained bed object is indicated by the bed_channel_assignment. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 21 The bed_channel_assignment is a list of channel labels that indicate a speaker-anchored coordinate. Objects contained in the bed are mapped t... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.2 Size | The size property is the data that is provided as size at the decoder interface. The size property comprises the three values width; depth; height that indicate the apparent 3-dimensional spatial extent of the object. Width, depth and height can be controlled independently along the three axes x, y and z of the coord... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.3 Priority | The priority property is the data that is provided as priority at the decoder interface. The priority property shall be set to object_priority. It imposes an ordering by importance where higher priority indicates higher importance and is bounded by 0; 1 . Table 3 lists the related bitstream elements and their reference... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.4 Gain | The gain property is the data that is provided as gain at the decoder interface. The gain property value shall bet set to object_gain. The gain property can be used to apply a custom gain value to an object. It is bounded by −∞dB; +15dB . Table 4 lists the related bitstream elements and their reference. Table 4: Object... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.5 Channel lock | The channel lock property is the data that is provided as channel_lock at the decoder interface. Channel lock is a Boolean property that shall be set to b_object_snap. Channel lock can be used to constrain rendering of an object to a single speaker, providing a non-diffuse, timbre-neutral reproduction. True indicates t... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.6 Zone constraints | The zone constraints property is the data that is provided in zone_constraints_update at the decoder interface. The list zone_constraints specifies zone constraints (include or exclude) for the following zones: • Screen zone • Side zone • Surround zone • Back zone • Centre-and-back zone • Top-Bottom zone NOTE: Zones ma... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.7 Object Divergence | The object divergence property is the data that is provided as object_divergence at the decoder interface. Object divergence is a property that shall be set to the value of object_divergence. Divergence is used to convert one object into two objects, where the energy is spread along the X-Axis. Table 8 lists the relate... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.2.8 Object Trim | The object trim property is the data that is provided as object_trim at the decoder interface. Object trim is a property that shall be set to the transmitted trim values listed in table 9. Object trim can be used to lower the level of out-of-screen elements that are included in the mix. This can be desirable when immer... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.3 Property update information | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.3.1 Introduction | The Property Update Information contains the data that is provided as timing_data at the decoder interface. The OAMD bitstream supports multiple updates of the object properties per codec frame. The bitstream contains timing information corresponding to these updates. In the context of this clause, previous and subsequ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.3.2 Timing of property updates | The timing of one transmitted property update specifies its start time, along with that its context with preceding or subsequent updates and the temporal duration for an interpolation process between successive updates. The OAMD bitstream syntax supports up to eight property updates per object in each codec codec frame... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.4 Object audio metadata structure | The OAMD bitstream contains metadata updates. Each update contains the metadata is updated; timing information is shared between objects and updates. Figure 6 shows the OAMD bitstream structure. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 26 Figure 6: OAMD bitstream structure Table 11 lists the blocks contained in the OAMD b... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5 Bitstream syntax | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.1 variable_bits_max | Syntax No of bits variable_bits_max(n, max_num_groups) { value = 0; num_group = 1; read; ............................................................................. n value += read; b_read_more; ...................................................................... 1 if (max_num_groups > num_group) { if (b_read_more)... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.2 object_audio_metadata_payload | Syntax No of bits object_audio_metadata_payload() { oa_md_version_bits; ............................................................... 2 if (oa_md_version_bits == 0x3) { oa_md_version_bits_ext; ......................................................... 3 oa_md_version_bits += oa_md_version_bits_ext; } object_count_bits... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.3 program_assignment | Syntax No of bits program_assignment() { b_dyn_object_only_program; ........................................................ 1 if (b_dyn_object_only_program) { b_lfe_present; .................................................................. 1 } else { content_description[]; ............................................... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.4 oa_element_md | Syntax No of bits oa_element_md() { oa_element_id_idx; ................................................................ 4 oa_element_size_bits = variable_bits_max(4,4); if (b_alternate_object_data_present) { alternate_object_data_id_idx; ................................................... 4 } b_discard_unknown_element;... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.5 object_element | Syntax No of bits object_element() { md_update_info(); b_reserved_data_not_present; ...................................................... 1 if (!reserved_data_not_present) { reserved; ....................................................................... 5 } for (j = 0; j < object_count; j++) { object_data(); } } |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.6 md_update_info | Syntax No of bits md_update_info() { sample_offset_code; ............................................................... 2 if (sample_offset_code == 0b01) { sample_offset_idx; .............................................................. 2 } ETSI ETSI TS 103 420 V1.2.1 (2018-10) 30 Syntax No of bits else { if (sample_... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.7 block_update_info | Syntax No of bits block_update_info() { block_offset_factor_bits; ......................................................... 6 ramp_duration_code; ............................................................... 2 if (ramp_duration_code == 0b11) { b_use_ramp_duration_idx; .................................................... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.8 object_data | Syntax No of bits object_data() { for (blk = 0; blk < num_obj_info_blocks; blk++) { object_info_block(blk); } } ETSI ETSI TS 103 420 V1.2.1 (2018-10) 31 |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.9 object_info_block | Syntax No of bits object_info_block(blk) { b_object_not_active; .............................................................. 1 if (b_object_not_active) { object_basic_info_status_idx = 0b00; } else { if (blk == 0) { object_basic_info_status_idx = 0b01; } else { object_basic_info_status_idx; ............................. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.10 object_basic_info | Syntax No of bits object_basic_info() { if (object_basic_info_status_idx == 0b01) { object_basic_info[] = {true, true}; } else { object_basic_info[]; ............................................................ 2 } if (object_basic_info[1]) { object_gain_idx; ............................................................... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.11 object_render_info | Syntax No of bits object_render_info() { if (object_render_info_status_idx == 0b01) { obj_render_info[] = {true, true, true, true}; } else { obj_render_info[]; .............................................................. 4 } if (obj_render_info[0]) { if (blk == 0) { b_differential_position_specified = FALSE; } else {... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.12 trim_element | Syntax No of bits trim_element() { warp_mode; ........................................................................ 2 reserved; ......................................................................... 2 global_trim_mode; ................................................................. 2 if (global_trim_mode == 0b1... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.13 extended_object_element | Syntax No of bits extended_object_element() { b_obj_div_block; .................................................................. 1 if (b_obj_div_block) { for (obj = 0; obj < object_count; obj++) { for (blk = 0; blk < num_obj_info_blocks; blk++) { obj_div_block(obj, b_obj_not_active, obj_type); } } } b_ext_prec_pos_blo... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.14 obj_div_block | Syntax No of bits obj_div_block(obj_id, b_obj_not_active, obj_type) { if (b_obj_not_active) { object_divergence = 0; } else { if (obj_type == DYNAMIC) { b_object_divergence; .......................................................... 1 if (b_object_divergence) { object_div_mode; ............................................ |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.5.15 ext_prec_pos_block | Syntax No of bits ext_prec_pos_block(obj_id, b_obj_not_active, obj_type) { if (b_obj_not_active) { b_ext_prec_pos = false; } else { if (obj_type == DYNAMIC) { b_ext_prec_pos; ............................................................... 1 ETSI ETSI TS 103 420 V1.2.1 (2018-10) 35 Syntax No of bits if (b_ext_prec_pos) ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6 Bitstream description | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0 Object audio metadata content description | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.1 oa_md_version_bits | The oa_md_version_bits element is an unsigned integer that determines the OAMD syntax version. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.2 object_count_bits | The object_count_bits codeword indicates the value of object_count. The value of object_count is determined by the following equation: object_count = object_count_bits + 1. In this equation, the bits of the object_count_bits element are interpreted as an unsigned integer. object_count indicates the total number of obje... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.3 b_alternate_object_data_present | The b_alternate_object_data_present flag indicates whether each oa_element block contains an alternate_object_data_id_idx element. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.4 oa_element_count_bits | The oa_element_count_bits unsigned integer determines the number of oa_element blocks contained in the object_audio_metadata_payload block. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.5 b_dyn_object_only_program | The b_dyn_object_only_program flag indicates whether the bitstream contains one or more dynamic objects plus an optional LFE channel (when true), or it contains a combination of one or more bed instances, intermediate spatial format and one or more dynamic objects (when false). |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.6 b_lfe_present | The b_lfe_present flag indicates whether a bitstream that otherwise contains only dynamic objects also contains an LFE channel. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.7 content_description[] | The content_description[] array indicates the object types present in the bitstream. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 36 Each element of the content_description array is a flag that indicates whether one or more objects of the assigned object type are present in the bitstream. Table 11a lists the object types for ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.8 b_bed_chan_distribute | The b_bed_chan_distribute flag indicates whether bed channels (i.e. objects with a speaker-anchored position) are intended to be distributed to multiple appropriate loudspeakers. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.9 b_multiple_bed_instances_present | The b_multiple_bed_instances_present flag indicates whether the bitstream contains multiple bed instances. If the b_multiple_bed_instances_present flag is false, it indicates that num_bed_instances = 1. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.10 num_bed_instances_bits | The num_bed_instances_bits codeword indicates the value of num_bed_instances. The value of num_bed_instances is determined by the following equation: num_bed_instances = num_bed_instances_bits + 2. In this equation, the bits of num_bed_instances_bits are interpreted as an unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.11 intermediate_spatial_format_idx | The intermediate_spatial_format_idx index indicates the intermediate spatial format (ISF) type of the associated objects. The ISF type indicated by intermediate_spatial_format_idx is shown in table 11b. Table 11b: Intermediate spatial format intermediate_spatial_format_idx ISF type (SR notation) objects present (MULZ o... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.0.12 num_dynamic_objects_bits | The num_dynamic_objects_bits codeword indicates the value of num_dynamic_objects. The value of num_dynamic_objects is determined by the following equation: num_dynamic_objects = num_dynamic_objects_bits + 1. In this equation, the bits of num_dynamic_objects_bits are interpreted as unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1 Audio object properties | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1 Position | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.1 Void | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.2 Void | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.3 b_standard_chan_assign | The b_standard_chan_assign flag indicates whether the bed_channel_assignment is indicated by the bed_channel_assignment[] array (if true) or by the nonstd_bed_channel_assignment[] array (when false). |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.4 bed_channel_assignment[] | The bed_channel_assignment[] array of flags indicates the bed_channel_assignment. The bed_channel_assignment is a list of channel labels. Each element of the bed_channel_assignment[] array is a flag that indicates whether the corresponding channel labels or pair of channel labels shall be contained in the bed_channel_a... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.5 nonstd_bed_channel_assignment[] | The nonstd_bed_channel_assignment[] array indicates the bed_channel_assignment. The bed_channel_assignment is a list of channel labels. Each element of the nonstd_bed_channel_assignment[] array is a flag that indicates whether the corresponding channel label shall be contained in the bed_channel_assignment list. Table ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.6 b_lfe_only | The b_lfe_only flag indicates whether the bed_channel_assignment contains one LFE channel and no other channels. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.7 b_differential_position_specified | The b_differential_position_specified flag indicates how the position values pos3D_X, pos3D_Y and pos3D_Z are signalled in the bitstream. Table 14 specifies how the values of pos3D_X, pos3D_Y and pos3D_Z are signalled in the bitstream. Table 14: Signalling of pos3D_X, pos3D_Y and pos3D_Z b_differential_position_specifi... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.8 pos3D_X_bits | The pos3D_X_bits codeword indicates the value of pos3D_X. pos3D_X indicates the x-coordinate value for the position of the object. The value of pos3D_X shall be determined by the following equation: pos3D_X = min 1; pos3D_X_bits + ext_prec_pos3D_X × . In this equation, the bits of pos3D_X_bits are interpreted a... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.9 pos3D_Y_bits | The pos3D_Y_bits codeword indicates the value of pos3D_Y. pos3D_Y indicates the y-coordinate value for the position of the object. The value of pos3D_Y shall be determined by the following equation: pos3D_Y = min 1; pos3D_Y_bits + ext_prec_pos3D_Y × , where the bits of pos3D_Y_bits are interpreted as an unsigne... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.10 pos3D_Z_sign_bits | The pos3D_Z_sign_bits codeword indicates the value of pos3D_Z_sign. pos3D_Z_sign is used to determine whether the z-coordinate for the position of the object is positive or negative. The pos3D_Z_sign value shall be determined by the following equation: pos3D_Z_sign = −1, ℎ pos3D_Z_sign_bits = 0 +1, |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.11 pos3D_Z_bits | The pos3D_Z_bits codeword indicates the value of pos3D_Z. pos3D_Z indicates the z-coordinate value for the position of the object. The value of pos3D_Z shall be determined by the following equation: pos3D_Z = pos3D_Z_sign × pos3D_Z_bits 15 + ext_prec_pos3D_Z 15 × 5 The bits of pos3D_Z_bits are interpreted as an unsigne... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.12 diff_pos3D_X_bits | The diff_pos3D_X_bits codeword indicates the value of pos3D_X, taking into account the previous standard precision value of pos3D_X (differential coding). The pos3D_X value shall be determined by the following equation: pos3D_X = max 0; min 1; pos3D_X_bitsprev 62 + diff_pos3D_X_bits 62 + ext_prec_pos3D_X 62 × 5 In... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.13 diff_pos3D_Y_bits | The diff_pos3D_Y_bits codeword indicates the value of pos3D_Y, taking into account the previous standard precision value of pos3D_Y (differential coding). The pos3D_Y value shall be determined by the following equation: ETSI ETSI TS 103 420 V1.2.1 (2018-10) 40 pos3D_Y = max 0; min 1; pos3D_Y_bitsprev + diff_pos3D_... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.14 diff_pos3D_Z_bits | The diff_pos3D_Z_bits codeword indicates the value of pos3D_Z, taking into account the previous value of pos3D_Z (differential coding). The pos3D_Z value shall be determined by the following equation: pos3D_Z = max −1; min 1; pos3D_Z_bitsprev 15 + diff_pos3D_Z_bits 15 + ext_prec_pos3D_Z 15 × 5 In this equation, th... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.15 b_object_distance_specified | The b_object_distance_specified flag indicates whether the position of an object is outside of the room boundaries. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.16 b_object_at_infinity | The b_object_at_infinity flag indicates whether the object distance from the listening position is equal to infinity (when true) or is indicated by the distance_factor_idx element (when false). |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.17 distance_factor_idx | The distance_factor_idx index indicates the value of distance_factor. The value of distance_factor shall be determined as specified in table 15. Table 15: distance_factor value indicated by the distance_factor_idx element distance_factor_idx distance_factor 0 1,1 1 1,3 2 1,6 3 2,0 4 2,5 5 3,2 6 4,0 7 5,0 8 6,3 9 7,9 10... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.18 b_object_use_screen_ref | The b_object_use_screen_ref flag indicates whether the signalled values of pos3D_X, pos3D_Y and pos3D_Z are related to the screen (when true) or to the room (when false). If the b_object_use_screen_ref flag is true, the screen_factor_bits element and the depth_factor_idx element follow in the bitstream. If the b_object... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.19 screen_factor_bits | The screen_factor_bits unsigned integer indicates the value of screen_factor. The value of screen_factor shall be determined by the following equation: screen_factor = screen_factor_bits + 1 8 |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.1.20 depth_factor_idx | The depth_factor_idx index indicates the value of depth_factor. The value of the depth_factor shall be determined as specified in table 16. Table 16: The value of depth_factor indicated by the depth_factor_idx element depth_factor_idx depth_factor 0 0,25 1 0,5 2 1 3 2 |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2 Size | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2.1 object_size_idx | The object_size_idx index indicates the values of object_width, object_depth and object_height. Table 17 lists the values of object_width, object_depth, and object_height. Table 17: Values of object_width, object_depth and object_height object_size_idx object_width object_depth object_height 0 0 0 0 1 object_size_bits ... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2.2 object_size_bits | The object_size_bits codeword indicates the value of object_width, object_depth and object_height. The values shall be determined by the following equation: object_width = object_depth = object_height = object_size_bits 31 In this equation the bits of object_size_bits are interpreted as an unsigned integer. ETSI ETSI... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2.3 object_width_bits | The object_width_bits codeword indicates the value of object_width. The value of object_width shall be determined by the following equation: object_width = object_width_bits 31 In this equation, the bits of object_width_bits are interpreted as an unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2.4 object_depth_bits | The object_depth_bits codeword indicates the value of object_depth. The value of object_depth shall be determined by the following equation: object_depth = object_depth_bits 31 In this equation, the bits of object_depth_bits are interpreted as an unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.2.5 object_height_bits | The object_height_bits codeword indicates the value of object_height. The value of object_height shall be determined by the following equation: object_height = object_height_bits 31 In this equation, the bits of object_height_bits are interpreted as an unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.3 Priority | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.3.1 b_default_object_priority | The b_default_object_priority flag indicates whether the value of object_priority shall default to 1,0 (when true) or is indicated by the object_priority_bits element (when false). The value of object_priority is in [0; 1], where object_priority in [0; 1[ is signalled as specified in clause 5.6.1.3.2. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.3.2 object_priority_bits | The object_priority_bits codeword indicates the value of the object_priority. The value of object_priority shall be determined by the following equation: object_priority = object_priority_bits 32 In this equation, the bits of object_priority_bits are interpreted as an unsigned integer. The value of object_priority is... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.4 Gain | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.4.1 object_gain_idx | The object_gain_idx index indicates the value of object_gain. object_gain shall be derived from object_gain_idx as specified in table 18. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 43 Table 18: Value of object_gain object_gain_idx object_gain 0 0 dB 1 -∞ dB 2 indicated by the object_gain_bits element 3 object_gain of the pr... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.4.2 object_gain_bits | The object_gain_bits unsigned integer indicates the value of object_gain. The value of object_gain shall be determined as specified in table 19. Table 19: Determination of object_gain indicated by object_gain_bits object_gain_bits object_gain [dB] 0 - 14 15 −object_gain_bits; object_gain is in [1; 15] 15 - 63 14 −objec... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.5 Channel lock | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.5.1 b_object_snap | The b_object_snap flag indicates the channel lock property. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.6 Zone constraints | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.6.1 zone_constraints_idx | The zone_constraints_idx index indicates zone constraints for the horizontal zones. Horizontal zones are marked to be included or excluded as listed in table 20. NOTE: Constraints for the Top-Bottom zone are documented in clause 5.6.1.6.2. Table 20: Zone constraints indicated by the zone_constraints_idx element zone_co... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.1.6.2 b_enable_elevation | The b_enable_elevation flag indicates the zone constraints for the Top-Bottom zone. Semantics for the b_enable_elevation element are listed in table 21. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 44 Table 21: Zone constraints indicated by b_enable_elevation b_enable_elevation Zone constraints true Top-Bottom zone included f... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2 Timing metadata | |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.1 sample_offset_code | The sample_offset_code index indicates the value of sample_offset. Table 22 lists the value of sample_offset indicated by the sample_offset_code element. Table 22: Signalling of sample_offset sample_offset_code sample_offset 0 0 1 indicated by the following sample_offset_idx element 2 indicated by the following sample_... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.2 sample_offset_idx | The sample_offset_idx index indicates the value of sample_offset. Table 23 lists the value of sample_offset indicated by the sample_offset_idx element. Table 23: Value of sample_offset sample_offset_idx sample_offset (in samples) 0 8 1 16 2 18 3 24 |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.3 sample_offset_bits | The sample_offset_bits unsigned integer determines the value of sample_offset. sample_offset is in a range [0; 31]. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.4 num_obj_info_blocks_bits | The num_obj_info_blocks_bits codeword indicates the value of num_obj_info_blocks. The num_obj_info_blocks value is determined by the following equation: num_obj_info_blocks = num_obj_info_blocks_bits + 1 In this equation, the bits of num_obj_info_blocks_bits are interpreted as an unsigned integer. |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.5 block_offset_factor_bits | The block_offset_factor_bits unsigned integer indicates the block_offset_factor value. ETSI ETSI TS 103 420 V1.2.1 (2018-10) 45 |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.6 ramp_duration_code | The ramp_duration_code index indicates the value of ramp_duration. Table 24 lists the value of ramp_duration indicated by the ramp_duration_code element: Table 24: Value of ramp_duration ramp_duration_code ramp_duration 0 0 1 512 2 1 536 3 Indicated by the b_use_ramp_duration_idx element |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.7 b_use_ramp_duration_idx | The b_use_ramp_duration_idx flag indicates whether the value of ramp_duration is indicated by the ramp_duration_idx element (when true) or by the ramp_duration_bits element (when false). |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.8 ramp_duration_idx | The ramp_duration_idx index indicates the value of ramp_duration. Table 25 lists the value of ramp_duration indicated by the corresponding table index. Table 25: Value of ramp_duration ramp_duration_idx ramp_duration (in samples) 0 32 1 64 2 128 3 256 4 320 5 480 6 1 000 7 1 001 8 1 024 9 1 600 10 1 601 11 1 602 12 1 9... |
615998d1ca83294bf09c70d936c0b900 | 103 420 | 5.6.2.9 ramp_duration_bits | The ramp_duration_bits unsigned integer determines the value of ramp_duration. ramp_duration is in the range of [0; 2 047]. |
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