{"id":5009,"number":"06.90","type":"TS","title":"Adaptive Multi-Rate speech transcoding","series":6,"status":"Under change control","initial_release":"Release 1998","primary_group":"S4","secondary_groups":[],"portal_id":311,"portal_url":"https://portal.3gpp.org/desktopmodules/Specifications/SpecificationDetails.aspx?specificationId=311","dynareport_url":"https://www.3gpp.org/dynareport/0690.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=311","bibliography_source":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv"},"detail_synced_at":"2026-10-07T22:15:29.499293+00:00","versions":[{"release":"Release 1998","version":"7.2.1","meeting":"-","upload_date":"2000-05-09","comment":"","official_file_url":"https://www.3gpp.org/ftp/Specs/archive/06_series/06.90/0690-721.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":null,"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/06.90/0690-720.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":14354,"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/06.90/0690-710.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":12536,"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/06.90/0690-700.zip","source_url":"ftp://ftp.3gpp.org/Information/Databases/3GPPBibliography.csv","portal_version_id":12535,"version_status":null}],"release_presence":[{"release":"Release 1998","first_version_date":"1999-02-12","latest_version_date":"2000-05-09","first_version":"7.0.0","latest_version":"7.2.1","version_count":4}],"classifications":[],"work_items":[],"change_requests":[{"portal_cr_id":null,"cr_number":"0000","revision":null,"category":"F","impacted_version":"..","target_release":"R98","title":"Adaptive Multi-Rate speech transcoding","wg_tdoc":"78/99","wg_status":"agreed","tsg_tdoc":"P-99-128","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":"F","impacted_version":"7.0.0","target_release":"R98","title":"Introduction of codec homing procedure","wg_tdoc":"131/99","wg_status":"agreed","tsg_tdoc":"P-99-421","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":"A002","revision":null,"category":"F","impacted_version":"7.0.0","target_release":"R98","title":"Description of instability protection in AMR","wg_tdoc":"135/99","wg_status":"agreed","tsg_tdoc":"P-99-421","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":"7.1.0","target_release":"R98","title":"Bit allocation of the adaptive multi-rate codec","wg_tdoc":"B-99-335","wg_status":"agreed","tsg_tdoc":"P-99-632","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}],"relationships":[],"relationship_release_evidence_summary":[],"relationship_release_evidence":[],"relationship_release_evidence_meta":{"total":0,"returned_count":0,"limit":100,"truncated":false,"href":"/api/specs/06.90/relationship-evidence"}}