Broadcast streaming of panoramic video for interactive clients

A stream demultiplexer, comprising:

• a data stream former configured to selectively extract at least two separate elementary streams from a group of separate elementary streams, the at least two separate elementary streams comprising encoded data coding different spatial segments or different groups of subsequent spatial segments of a video picture of a video stream, wherein the data stream former is configured to combine the at least two separate elementary streams to a data stream comprising the encoded data coding the different spatial segments or different groups of subsequent spatial segments of the video picture of the video stream, wherein the different spatial segments or different groups of subsequent spatial segments of the video picture of the video stream are encoded such that the encoded data comprises, for each spatial segment or group of spatial segments, at least one slice, wherein the slice or slices for each spatial segment or group of spatial segments are packetized into one separate elementary stream, wherein the slices of at least one of the spatial segments or groups of subsequent spatial segments are packetized into the separate elementary stream, wherein a further separate elementary stream comprises suitable slice headers which are, relative to the slices of the at least one of the spatial segments or groups of subsequent spatial segments, modified with respect to its picture position or picture size;
• and
• an output interface configured to provide the data stream;
• wherein the data stream former is configured to combine the at least two separate elementary streams to a HEVC standard conformant data stream,
• wherein the data stream former is configured to modify a header information of the at least two separate elementary streams or to add a header information to the at least two separate elementary streams based on the suitable slice headers comprised in the further separate sub stream, to obtain the HEVC standard conformant data stream.

A method for stream multiplexing, the method comprising:

• receiving encoded data for each of at least two different spatial segments or different groups of subsequent spatial segments of video pictures of a video stream;
• and
• packetizing the encoded data for each of the at least two different spatial segments or different groups of spatial segments into separate elementary streams, wherein the at least two different spatial segments or different groups of subsequent spatial segments of the video picture of the video stream are encoded such that the encoded data comprises, for each spatial segment or group of spatial segments, at least one slice, wherein the slice or slices for each spatial segment or group of spatial segments are packetized into one separate elementary stream,
• wherein the slices of at least one of the spatial segments or groups of subsequent spatial segments are packetized into the separate elementary stream and the method further comprises
• providing a further separate stream comprising suitable slice headers which are, relative to the slices of the at least one of the spatial segments or groups of subsequent spatial segments, modified with respect to its picture position or picture size.

A method for stream demultiplexing, the method comprising:

• selectively extracting at least two separate elementary streams from a group of separate elementary streams, the at least two separate elementary streams comprising encoded data coding different spatial segments or different groups of subsequent spatial segments of a video picture of the video stream, wherein the different spatial segments or different groups of subsequent spatial segments of the video picture of the video stream are encoded such that the encoded data comprises, for each spatial segment or group of spatial segments, at least one slice, wherein the slice or slices for each spatial segment or group of spatial segments are packetized into one separate elementary stream, wherein the slices of at least one of the spatial segments or groups of subsequent spatial segments are packetized into the separate elementary stream, wherein a further separate elementary stream comprises suitable slice headers which are, relative to the slices of the at least one of the spatial segments or groups of subsequent spatial segments, modified with respect to its picture position or picture size;
• and
• combining the at least two separate elementary streams to a data stream comprising the encoded data coding the different spatial segments or different groups of subsequent spatial segments of a video picture of the video stream, wherein the at least two separate elementary streams are combined to a HEVC standard conformant data stream, wherein a header information of the at least two separate elementary streams is modified or a header information is added to the at least two separate elementary streams based on the suitable slice headers comprised in the further separate sub stream, to obtain the HEVC standard conformant data stream.