标准编号：ISO/IEC 23001-11:2019
中文名称：信息技术 MPEG系统技术 第11部分：节能的媒体消费（绿元数据）
英文名称：Information technology — MPEG systems technologies — Part 11: Energy-efficient media consumption (green metadata)
发布日期：2019-03
标准范围
This document specifies metadata for energy-efficient decoding, encoding, presentation and selection
of media.
The metadata for energy-efficient decoding specifies two sets of information: complexity metrics (CM)
metadata and decoding operation reduction request (DOR-Req) metadata. A decoder uses CM metadata
to vary operating frequency and thus reduce decoder power consumption. In a point-to-point video
conferencing application, the remote encoder uses the DOR-Req metadata to modify the decoding
complexity of the bitstream and thus reduce local decoder power consumption.
The metadata for energy-efficient encoding specifies a quality metric that is used by a decoder to reduce
the quality loss from low-power encoding.
The metadata for energy-efficient presentation specifies RGB-component statistics and quality levels. A
presentation subsystem uses this metadata to reduce power by adjusting display parameters, based on
the statistics, to provide a desired quality level from those provided in the metadata.
The metadata for energy-efficient media selection specifies decoder operation reduction ratios (DOR-
Ratios), RGB-component statistics and quality levels. The client in an adaptive streaming session
uses this metadata to determine decoder and display power-saving characteristics of available video
representations and to select the representation with the optimal quality for a given power-saving.
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