Organisation internationale de normalisation
General Input Documents AHG reports
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- General technical contributions
- Demo FAQ
- ISO/IEC 13818-1:2013 AMD 7 Carriage of layered HEVC
- ISO/IEC 13818-1:2014 AMD 4 Carriage of Green Metadata
- ISO/IEC 13818-1:2014 AMD 5 Carriage of additional MPEG-4 audio profile level
- ISO/IEC 13818-1:2014 AMD 6 Carriage of 3D Audio
General Input Documents
on an editorial issue in FDAM 5 to ISO/IEC 13818-1:2013 (Transport of MVC depth video sub-bitstream and extensions to support HEVC low delay coding mode). The accepted DoC N 14314 from Valencia meeting was not reflected in the FDAM text. This has been corrected and conveyed to SC 29 secretariat for use during the editing by ITU-T. This is already reflected in DAM 3 to ISO/IEC 13818-1:201x.
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This amendment defines tools to identify and synchronize external data associated with an MPEG program in MPEG-2 transport streams. The tools allow: - alignment of media timelines regardless of PCR discontinuities through a variety of possible time codes, - signaling of URLs of associated data and their types (mime types, ISOBMFF, MPEG-DASH, MMT), - announcement of upcoming associated data
This amendment will specify layered coding techniques, namely multiview and scalable HEVC coding. Layered media streams need to be supported by the transport formats in a way that different layers can be encapsulated and transported individually.
This amendment specifies a format for carriage of green metadata that enables display power reduction in MPEG-2 TS. The metadata consists of frame statistics and quality indicators. This metadata allows the client to attain a specified quality level by scaling frame-buffer pixels and to reduce power correspondingly by decreasing the display backlight or OLED voltage.
This is to add support for a general framework to add sample “variants” to the ISOBMFF. This would be used by a forensic “watermarking” system to modify the base sample, but is independent of the “watermarking” algorithm. Variants are sample data that may be used by a decoder and DRM system to ultimately output video or audio that is marked in a way that can be unique to individual decoders or decoder product models. The application of the variants during the decode process is under control of the DRM system (and ultimately the content provider).
This amendment defines stream type, descriptors and buffer model to carry MPEG-H 3D audio bitstream in MPEG-2 TS. Two stream types will be assigned to distinguish main stream from auxiliary stream. Descriptors will provide information on user selectable and/or modifiable audio objects and information on which object contains either supplementary or main audio. T-STD extension will allow splitting an encoded audio scene into several elementary streams. One single audio decoder decodes all elementary streams to one audio presentation. Each of those elementary streams carries one or more encoded channel signals.
On description of operation point. The changes to operation point descriptor was accepted as well as allowing the use of this descriptor when stream type values for layered HEVC are present in PMT.
on description of dependency information. Group accepted Option 2 in the document to clarify the dependencies.
from Qualcomm on buffer model and HRD descriptor. Group agreed that the HEVC video descriptor bits signaling still picture, 24 hour pictures (long term) and sub-picture presence will apply to enhancement layers also. Changes proposed to the HEVC HRD descriptor were accepted and will go into the DAM 3 text.
on editors inputs to PDAM 3.
on aspects of layered HEVC transport. Includes some of the bit rate suggestions similar to that in other contributions. These were accepted and will go into DAM 3 text.
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