{"id":5000,"number":"06.73","type":"TS","title":"Adaptive Multi Rate (AMR) speech; ANSI-C code for the AMR speech codec","series":6,"status":"Under change control","initial_release":"Release 1998","primary_group":"S4","secondary_groups":[],"portal_id":302,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=302","dynareport_url":"https://www.3gpp.org/dynareport/0673.htm","publication_scope":null,"radio_technologies":[],"first_seen_at":"2026-09-16T11:04:47.492762+00:00","updated_at":"2026-10-16T09:34:47.275473+00:00","raw_metadata":{"source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=302","bibliography_source":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv"},"detail_synced_at":"2026-10-07T22:14:53.871450+00:00","versions":[{"release":"Release 1998","version":"7.6.0","meeting":"SA-#14","upload_date":"2002-01-09","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-760.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":22146,"version_status":null},{"release":"Release 1998","version":"7.5.0","meeting":"SA-#11","upload_date":"2001-04-10","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-750.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":35303,"version_status":null},{"release":"Release 1998","version":"7.4.1","meeting":"SA-#7","upload_date":"2000-09-28","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-741.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"version_status":null},{"release":"Release 1998","version":"7.4.0","meeting":"SA-#7","upload_date":"2000-03-15","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-740.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":31379,"version_status":null},{"release":"Release 1998","version":"7.3.0","meeting":"SA-#6","upload_date":"1999-12-17","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-730.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":33073,"version_status":null},{"release":"Release 1998","version":"7.2.0","meeting":"-","upload_date":"1999-11-11","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-720.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":26384,"version_status":null},{"release":"Release 1998","version":"7.1.0","meeting":"-","upload_date":"1999-06-25","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-710.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":10533,"version_status":null},{"release":"Release 1998","version":"7.0.0","meeting":"-","upload_date":"1999-02-12","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.73/0673-700.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":11696,"version_status":null}],"release_presence":[{"release":"Release 1998","first_version_date":"1999-02-12","latest_version_date":"2002-01-09","first_version":"7.0.0","latest_version":"7.6.0","version_count":8}],"classifications":[],"work_items":[{"uid":35016,"acronym":"CH","effective_acronym":"CH","title":"Rel-6 Charging Management","responsible_groups":["S2","S5"],"release":"Rel-6","status":"Awaiting approval","wi_level":"Feature (1st level)","type":"Work Item","first_release":null,"last_release":null,"provenance_type":"official","source_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=302","association_sources":[],"association_status":"historical_unverified"}],"change_requests":[{"portal_cr_id":null,"cr_number":"A002","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to Bit Exact Implementation of Gain Calculation in Adaptive Gain Control (agc) for 12.2 and 7.4 kbit/s Mode","wg_tdoc":"140/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A003","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to the bit stream output file format used by the speech encoder","wg_tdoc":"141/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A008","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to DTX decoder LSF history buffer update","wg_tdoc":"173/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A009","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to bit exact implementation of decoder synthesis filter instability protection","wg_tdoc":"174/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A010","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"AMR VAD/DTX Description","wg_tdoc":"208/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A011","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Input buffer initialisation routine added","wg_tdoc":"B-99-313","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A012","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Initialization of stat_count in vad1.c","wg_tdoc":"B-99-327","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A013","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction of algebraic code vector generation in both encoder and decoder","wg_tdoc":"B-99-328","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A014","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Use of random excitation when RX_NODATA and not in DTX","wg_tdoc":"B-99-329","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A025","revision":null,"category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of mode state bug in AMR decoder","wg_tdoc":"S4-010216","wg_status":"agreed","tsg_tdoc":"SP-010100","tsg_status":"approved","new_version":"7.5.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A026","revision":null,"category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of TX_TYPE and RX_TYPE identifiers","wg_tdoc":"S4-010219","wg_status":"revised","tsg_tdoc":null,"tsg_status":null,"new_version":"..","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A026","revision":"1","category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of TX_TYPE and RX_TYPE identifiers","wg_tdoc":"S4-010282","wg_status":"agreed","tsg_tdoc":"SP-010100","tsg_status":"approved","new_version":"7.5.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A027","revision":null,"category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of potential bug in AMR decoder due to the usage of standard C abs() function (VAD option_2)","wg_tdoc":"S4-010220","wg_status":"agreed","tsg_tdoc":"SP-010100","tsg_status":"approved","new_version":"7.5.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A028","revision":null,"category":"F","impacted_version":"7.5.0","target_release":"R98","title":"Correction of RX-DTX handling of NO_DATA frames in AMR decoder","wg_tdoc":"S4-010668","wg_status":"agreed","tsg_tdoc":"SP-010696","tsg_status":"approved","new_version":"7.6.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A029","revision":null,"category":"F","impacted_version":"7.5.0","target_release":"R98","title":"Correction in AMR decoder to avoid division by zero in RX- DTX handling","wg_tdoc":"S4-010671","wg_status":"agreed","tsg_tdoc":"SP-010697","tsg_status":"approved","new_version":"7.6.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A018","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction to Bit Exact Implementation of cod_amr.c","wg_tdoc":"B-99-333","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"0000","revision":null,"category":"F","impacted_version":"..","target_release":"R98","title":"ANSI-C code for the GSM Adaptive Multi Rate (AMR) speech codec","wg_tdoc":"77/99","wg_status":"agreed","tsg_tdoc":"P-99-127","tsg_status":"approved","new_version":"7.0.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A001","revision":null,"category":"B","impacted_version":"7.0.0","target_release":"R98","title":"Introduction of codec homing procedure","wg_tdoc":"130/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A004","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to Bit Exact Implementation of Levinson Algorithm for 12.2 kbit/s mode","wg_tdoc":"142/98","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A005","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to LSP vector initialization","wg_tdoc":"143/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A006","revision":null,"category":"D","impacted_version":"7.0.0","target_release":"R98","title":"Documentation of encoder/decoder file formats","wg_tdoc":"179/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A007","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Correction to list of decoder static variables","wg_tdoc":"134/99","wg_status":"agreed","tsg_tdoc":"P-99-420","tsg_status":"approved","new_version":"7.1.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A015","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction to Bit Exact Implementation of vad_cnst.h","wg_tdoc":"B-99-330","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A016","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction to Bit Exact Implementation of cor_h_x for 10.2 kbit/s mode","wg_tdoc":"B-99-331","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A017","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction to Bit Exact Implementation of dtx_dec","wg_tdoc":"B-99-332","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A019","revision":null,"category":"F","impacted_version":"7.1.0","target_release":"R98","title":"Correction to Bit Exact Implementation of gain quantization algorithm for 4.75 kbit/s mode","wg_tdoc":"B-99-334","wg_status":"agreed","tsg_tdoc":"P-99-630","tsg_status":"approved","new_version":"7.2.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A020","revision":null,"category":"F","impacted_version":"7.2.0","target_release":"R98","title":"Correction to reset function in AMR decoder","wg_tdoc":"S4-99456","wg_status":"agreed","tsg_tdoc":"SP-99570","tsg_status":"approved","new_version":"7.3.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A021","revision":null,"category":"F","impacted_version":"7.3.0","target_release":"R98","title":"Avoidance of pulse cancellation in FCB excitation","wg_tdoc":"S4-000023","wg_status":"agreed","tsg_tdoc":"SP-000025","tsg_status":"approved","new_version":"7.4.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A023","revision":null,"category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of potential bug in AMR decoder due to usage of standard C abs() function","wg_tdoc":"S4-010214","wg_status":"agreed","tsg_tdoc":"SP-010100","tsg_status":"approved","new_version":"7.5.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null},{"portal_cr_id":null,"cr_number":"A024","revision":null,"category":"F","impacted_version":"7.4.1","target_release":"R98","title":"Correction of comfort noise parameter interpolation bug of AMR decoder","wg_tdoc":"S4-010215","wg_status":"agreed","tsg_tdoc":"SP-010100","tsg_status":"approved","new_version":"7.5.0","source_url":"ftp://ftp.3gpp.org/Information/Databases/Change_Request/CRDB_20260715.zip","detail_synced_at":null}],"relationships":[],"relationship_release_evidence_summary":[],"relationship_release_evidence":[],"relationship_release_evidence_meta":{"total":0,"returned_count":0,"limit":100,"truncated":false,"href":"/api/specs/06.73/relationship-evidence"}}