ISO IEC 23001-10:2020 pdf free

ISO IEC 23001-10:2020 pdf free.Information technology – MPEG systems technologies
This document defines a storage format for timed metadata. The timed metadata can be associated with other tracks in the ISO base media file format. Timed metadata such as quality and power consumption information and their metrics are defined in this part for carriage in files based on the ISO base media file format (ISO/IEC 14496-12). The timed metadata can be used for multiple purposes including supporting dynamic adaptive streaming.
If quality metrics are carried in an ISO base media file format, they shall be carried in the metadata tracks within the ISO base media file format in accordance with ISO/IEC 14496-12. Different metric types and corresponding storage formats are identified by their unique code names. This clause defines those quality metrics.
The metadata track is linked to the track it describes by means of a ‘cdsc’ (content describes) track reference.
Codes not defined in this document are reserved and files shall use only codes defined here.The quality metrics sample entry shall contain a QualityMetricsConf igurat ionBox, describing metrics that are present in each sample, and the constant field size that is used for the values. The quality metrics are defined in subclause 4.3.
Each sample is an array of quality values, corresponding one for one to the declared metrics. Each value is padded by preceding zero bytes, as needed, to the number of bytes indicated by field. size_ bytes.The codecs parameter value for this track as defined in RFC 6381[6] shall be set to ‘vgme’. The sub-parameter for the ‘vqme ‘ codec is a list of the metrics present in the track as indicated by the metrics code names, joined by“+”, e.g. ‘vqme . psnr +mssm’.
NOTE 1 This is the traditional metric referred to as PSNR in academic literature and in the context of video compression research.
NOTE 2 In cases when the spatial resolution of the reference pictures and the reconstructed ones do not match, reconstructed pictures are up-sampled to match the spatial resolution of the reference.
NOTE 3 In cases when the pictures of reconstructed video represent only a subset of pictures in the reference video sequence, reconstructed pictures are replicated to produce time-aligned reconstructed pictures for all pictures in the reference sequence.ISO IEC 23001-10 pdf free download.