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GB/T 42651-2023: Space data and information transfer systems - Image data compression
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| GB/T 42651-2023 | English | 659 |
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Space data and information transfer systems - Image data compression
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GB/T 42651-2023
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Basic data | Standard ID | GB/T 42651-2023 (GB/T42651-2023) | | Description (Translated English) | Space data and information transfer systems - Image data compression | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | V75 | | Classification of International Standard | 49.140 | | Word Count Estimation | 32,364 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-09-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42651-2023: Space data and information transfer systems - Image data compression---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 49:140
CCSV75
National Standards of People's Republic of China
Space Data and Information Transmission System
image data compression
(ISO 26868:2009,NEQ)
Released on 2023-05-23
2023-09-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Symbols and abbreviations 2
4:1 Symbol 2
4:2 Abbreviations 3
5 General 3
5:1 Overview 3
5:2 Bit number convention 3
6 Discrete wavelet transform 4
6:1 Overview 4
6:2 Image data 4
6:3 Wavelet transform of one-dimensional signal 5
6:4 Wavelet inverse transform of one-dimensional signal 6
6:5 One-level two-dimensional discrete wavelet transform 7
6:6 One-level two-dimensional discrete wavelet inverse transform 7
6:7 Multilevel two-dimensional discrete wavelet transform 8
6:8 Multilevel 2D discrete wavelet inverse transform 8
6:9 Subband weights8
7-bit planar encoder9
7:1 Overview 9
7:2 Section header information 11
7:3 DC coefficient initialization coding 19
7:4 AC Coefficient Bit-Depth Encoding 22
7:5 Bit-plane coding implementation 23
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
This document was drafted with reference to ISO 26868:2009 "Image Data Compression for Spatial Data and Information Transmission Systems", and the degree of consistency is very high:
equivalent:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed and managed by the National Aerospace Technology and Its Application Standardization Technical Committee (SAC/TC425):
This document is drafted by: Xi'an Institute of Space Radio Technology, China Aerospace Standardization Institute, 21st Century Space Technology Application
Co:, Ltd:, Beijing Institute of Remote Sensing Equipment, Zhongyi (Shenzhen) Information Technology Co:, Ltd:, China Resources Satellite Application Center, Beijing Electronics
General Institute of Engineering:
The main drafters of this document: Han Yu, Zhang Jianhua, Li Li, Meng Hongying, Zhou Yuxia, Yang Xinquan, Zhang Aibing, Xiao Huachao, Chai Yuzhou, Sun Yulin,
Yan Kun, Xu Dongyan, Liu Congcong, Lei Yangfei, Gou Baowei, Li Hongjuan, Yan Ming, Li Lu, Liu Haijun, Wu Fei, Yi Wei, Peng Changjiang:
Space Data and Information Transmission System
image data compression
1 Scope
This document establishes the general principles of image data compression for spatial data and information transmission systems, and describes the principles of discrete wavelet transform and bit-plane coding:
method:
This document is applicable to the design and application of image data compression in spatial data and information transmission systems:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 42041 Terminology for Space Data and Information Transmission in Aerospace
3 Terms and Definitions
The following terms and definitions defined in GB/T 42041 apply to this document:
3:1
weight factor weightfactors
The proportion of wavelet coefficients:
3:2
DC coefficientDCcoefficient
DC component, wavelet coefficients of the lowest subband:
3:3
AC coefficientACcoefficient
AC component, the wavelet coefficients of subbands except the lowest subband:
3:4
block block
A set of 64 wavelet coefficients consisting of 1 DC coefficient in the lowest subband and 63 AC coefficients in the remaining 9 subbands:
3:5
segment segment
A collection of S consecutive blocks:
Note: S can be customized, for example, the range is 16≤S≤220:
3:6
Code segment codedsegment
Compressed code stream, a data segment beginning with a segment header:
3:7
group gaggle
Consists of a number of consecutive blocks within a segment:
NOTE: Segments can be divided into clusters, each cluster (except the last one) consisting of 16 blocks:
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