bopspark.blogg.se - Decoding software

#DECODING SOFTWARE VERIFICATION#
#DECODING SOFTWARE SOFTWARE#
#DECODING SOFTWARE CODE#

It is tailored to be flexible for research purposes and for portability rather than being streamlined for operational running within an NWP model.

#DECODING SOFTWARE CODE#

The code is written in Fortran-90, using many of the intrinsic features. The package is configured to support ATOVS, AIRS, IASI, ATMS, CrIS and SSMIS sensors, and is capable of supporting any nadir-sounding sensor for which a suitable radiative transfer model is available. The NWPSAF 1D-Var package is a stand-alone system for doing 1D-Var retrievals with user-provided files of observation and background error covariances.

#DECODING SOFTWARE SOFTWARE#

EUMETSAT’s Numerical Weather Prediction Satellite Application Facility (NWP SAF) develops satellite data processing modules for implementation at NWP centres.Īdditionally, software and tools from Third Party providers are also included below. The NWC SAF does this by developing and maintaining software packages for fast data processing at the user’s premises. This software was found useful by the developers of the standard, but may not conform to the normative specifications given in parts 1, 2, 3 and 6 of ISO/IEC 14496.įile locations given in this part of ISO/IEC 14496 are expressed relative to its location in the source tree.EUMETSAT’s Nowcasting Satellite Application Facility (NWC SAF) provides operational services to ensure the optimum use of meteorological satellite data in nowcasting and very short-range forecasting. Utility software is catalogued in Annex B (informative).The techniques used for encoding are not specified by this specification, and the quality and complexity of these encoders has not been optimized. The encoders are provided as a means to obtain elementary streams with the normative syntax described in parts 1, 2 and 3 of ISO/IEC 14496. This software creates elementary streams from associated media types. Elementary stream encoding software is catalogued in Annex A (informative).While this software appears in the normative part of this specification, attention is drawn to the fact that the implementation techniques used in this software are not considered normative – several different implementations could produce the same result – but the software is considered normative in that it correctly implements the decoding processes described in parts 1, 2, 3 and 6 of ISO/IEC 14496. This software accepts elementary streams encoded according to the normative specification in parts 1, 2, 3 and 6 of ISO/IEC 14496 and decodes the streams into the media types associated with each elementary stream.

Elementary stream decoding software is catalogued in clauses 3, 4 and 5.

The software contained in this part of ISO/IEC 14496 is divided into three categories: Although the decoding software is considered normative, it cannot add anything to the textual technical description included in parts 1, 2, 3 and 6 of ISO/IEC 14496. Complying ISO/IEC 14496 implementations are not expected to follow the algorithms or the programming techniques used by the reference software. Reference software is normative in the sense that any conforming implementation of the software, taking the same conformant bitstreams, using the same output file format, will output the same file. The techniques used for encoding are not specified by this specification. The performance of these encoders should not be taken as indicative of that which can be obtained from implementations where quality and computational optimization are given priority. Where bitstream encoding software is provided, attention is called to the fact that these encoders are provided for the purpose of creating bitstreams with normative syntax. Due to the delay between acceptance of a tool and its availability in source code form, the source for some tools described in other parts of ISO/IEC 14496 may not be present.

#DECODING SOFTWARE VERIFICATION#

This software has been derived from verification models used in the process of developing the standard. This part of ISO/IEC 14496 contains simulation software for tools defined in parts 1, 2, 3 and 6 of ISO/IEC 14496.