公开(公告)号：US20230024873A1

公开(公告)日：2023-01-26

申请号：US17781978

申请日：2020-12-02

申请人： DOLBY LABORATORIES LICENSING CORPORATION ,  DOLBY INTERNATIONAL AB

发明人： Michael C. WARD ,  Freddie SANCHEZ ,  Christof Joseph FERSCH

IPC分类号： G10L19/16

摘要： Embodiments are disclosed for channel-based audio (CBA) (e.g., 22.2-ch audio) to object-based audio (OBA) conversion. The conversion includes converting CBA metadata to object audio metadata (OAMD) and reordering the CBA channels based on channel shuffle information derived in accordance with channel ordering constraints of the OAMD. The OBA with reordered channels is rendered in a playback device using the OAMD or in a source device, such as a set-top box or audio/video recorder. In an embodiment, the CBA metadata includes signaling that indicates a specific OAMD representation to be used in the conversion of the metadata. In an embodiment, pre-computed OAMD is transmitted in a native audio bitstream (e.g., AAC) for transmission (e.g., over HDMI) or for rendering in a source device. In an embodiment, pre-computed OAMD is transmitted in a transport layer bitstream (e.g., ISO BMFF, MPEG4 audio bitstream) to a playback device or source device.