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GB/T 42970-2023Semiconductor integrated circuits—Measuring methods of video encoder and decoder circuits (English PDF)

半导体集成电路 视频编解码电路测试方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

September 7, 2023

Implementation date

January 1, 2024

Scope

GB/T 42970-2023 is the English-translated version of 半导体集成电路 视频编解码电路测试方法.

This document specifies the methods for measuring the electrical characteristics of video encoder and decoder circuits. The document applies to the testing of the analogue video interface circuits within video encoding and decoding circuits.

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Document preview — GB/T 42970-2023

National Standard of the People's Republic of China

ICS
31.200
Classification
L 56

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Contents

  • Preface
  • 1 Scope
  • 2 Normative reference documents
  • 3 Terms and Definitions
  • 4 General Rule
  • 4.1 Test environment requirements
  • 4.2 Test items
  • 4.3 Related documents
  • 5 Static parameter test
  • 5.1 Output high-level voltage VOH, output low-level voltage VOL
  • 5.2 Input high-level current IIH, input low-level current IIL
  • 5.3 Output high impedance current IOZ
  • 6 Dynamic Parameter Test
  • 6.1 Digital interface timing parameters
  • 6.2 Video signal amplitude VO
  • 6.3 Luminance nonlinear distortion LNL
  • 6.4 Brightness short-term waveform distortion STDLUM
  • 6.5 Brightness signal-to-noise ratio SNRLUM
  • 6.6 Chroma signal-to-noise ratio SNRCHROM
  • 6.7 Differential gain distortion DG
  • 6.8 Differential Phase Distortion DP
  • 6.9 Amplitude-frequency characteristics AF
  • 6.10 Chroma-luminance gain difference deltaSC-LUM
  • 6.11 Chroma-luminance delay difference tSC-LUM
  • 6.12 Field Time Waveform Distortion DVS
  • 6.13 Line time waveform distortion DHS
  • 6.14 Horizontal sync signal amplitude VHS, color burst signal amplitude VSC
  • 6.15 Color burst signal frequency fSC
  • 6.16 Pixel clock frequency fLLC
  • 6.17 Line frequency fHS
  • 6.18 Field frequency fVS
  • 6.19 Video resolution Resolution
  • 6.20 Clamping current ICLAMP

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

1 Scope

Test method for electrical characteristics of circuits (hereinafter referred to as "devices").

This document is suitable for testing analog video interface circuits in video encoding and decoding circuits.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 17574-1998 Semiconductor devices integrated circuits Part 2: Digital integrated circuits

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Video signal amplitude

Video signal voltage peak to peak.

3.2 LNL

When the average image level is a certain value, a small-amplitude step signal is added that gradually increases the starting level from the blanking level to the white level.

When reaching the input terminal of the circuit under test, the maximum difference between the ratio of each step amplitude at the output terminal and the corresponding step amplitude at the input terminal.

3.3 STDLUM

When a narrow pulse or fast step function with nominal brightness amplitude and specified shape is added to the input end of the circuit, the output pulse will have the same shape as its original shape. deviation.

3.4 SNRLUM

The ratio between the nominal value of the brightness signal amplitude and the peak clutter amplitude.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 24 pages — is available in the English PDF.

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