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US 2025/0239267 A1Published application
Method and apparatus for processing of auxiliary media streams embedded in a mpegh 3d audio stream
AssigneeDolby International AB
InventorsStephan SCHREINER, Christof FERSCH
Life of this patent
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Abstract
The disclosure relates to methods, apparatus and systems for side load processing of packetized media streams. In an embodiment, the apparatus comprises: a receiver for receiving a bitstream, and a splitter for identifying a packet type in the bitstream and splitting, based on the identification of a value of the packet type in the bit stream into a main stream and an auxiliary stream.
Claims4
A method for processing a merged packetized media bitstream, the method comprising:
- extracting, from the merged packetized media bitstream, a main stream that comprises MPEG-H 3D audio data encapsulated in an MHAS format;
- extracting, from the merged packetized media bitstream, an auxiliary stream that comprises additional audio data encapsulated as packets in the MHAS format, wherein the packets have a new MHAS packet type, wherein a format of a packet payload of the packets is different from a MPEG-H 3D format of the MPEG-H 3D audio data, and wherein the new MHAS packet type indicates an internal raw format;
- receiving mixing information of auxiliary audio streams with the main stream, wherein the mixing information relates to at least one of static gain(s) or dynamic gain(s);
- identifying time offset signaling that indicates there is a timeoffset of the auxiliary stream to the main stream, wherein the time offset signaling indicates that auxiliary stream signals shall be offset to arrive at a mixer aligned with the main stream;
- time-aligning the additional audio data with the MPEG-H 3D audio data based on the time offset signaling;
- and
- mixing the main stream with the auxiliary audio stream based on the mixing information.
4 more elements
An audio decoding apparatus for processing a merged packetized media bitstream, the apparatus comprising:
- a splitter configured to extract, from the merged packetized media bitstream, a main stream, wherein the main stream comprises MPEG-H 3D audio data encapsulated in an MHAS format, and an auxiliary stream, wherein the auxiliary stream comprises additional audio data encapsulated as packets in the MHAS format,
- wherein the packets have a new MHAS packet type, wherein a format of a packet payload of the packets is different from an MPEG-H 3D format of the MPEG-H 3D audio data, and wherein the new MHAS packet type indicates an internal raw format;
- a receiver for receiving mixing information of auxiliary audio streams with the main stream, wherein the mixing information relates to at least one of static gain(s) or dynamic gain(s);
- an identifying unit configured to identify time offset signaling that indicates there is a timeoffset of the auxiliary stream to the main stream, wherein the time offset signaling indicates that auxiliary stream signals shall be offset to arrive at a mixer aligned with the main stream;
- a time-alignment unit for time-aligning the additional audio data with the MPEG-H 3D audio data based on the time offset signaling;
- and
- a mixer for mixing the main stream with the auxiliary audio stream based on the mixing information.
4 more elements
Dependencies are inferred from the claim text.