GB/T 44021.4-2024Audio, video and related equipment - Determination of power consumption - Part 4: Video recording equipment (English PDF)

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 is part 4 of GB/T 44021 "Measurement of power consumption of audio, video and related equipment": GB/T 44021 has been published in Lower part:

--- Part 1: General;

--- Part 2: Test signals and media;

--- Part 3: Television sets;

--- Part 4: Video recording equipment;

--- Part 5: Set-top box (STB);

--- Part 6: Audio equipment:

This document is equivalent to IEC 62087-4:2015 "Measurement of power consumption of audio, video and related equipment Part 4: Video recording equipment":

The following minimal editorial changes were made to this document:

--- Added note to 3:1:1:

Introduction

As important consumer products, audio and video products are widely used in consumers' homes: The power consumption of audio and video and related equipment has become a major concern for consumers:

The development of this document provides a practical evaluation method for the power consumption evaluation of audio, video and related equipment, which will help strengthen the consumer product field:

It has played a positive role in building the domain standard system and promoting the healthy development of the industry:

GB/T 44021 "Measurement of power consumption of audio, video and related equipment" is planned to consist of 6 parts:

--- Part 1: General: The purpose is to specify general requirements for power consumption measurements of audio, video and related equipment:

--- Part 2: Test signals and media: The purpose is to give the test signals for audio, video and related equipment such as televisions and computer monitors:

Signals and media used when measuring power consumption:

--- Part 3: Television sets: The purpose is to specify the power consumption measurement and related characteristics of television sets:

--- Part 4: Video recording equipment: The purpose is to describe the power consumption measurement method of video recording equipment with removable media and give the power consumption Measurement related various operation modes:

--- Part 5: Set-top Box (STB): The purpose is to describe the power consumption measurement method of the set-top box and give various Operation mode:

--- Part 6: Audio equipment: The purpose is to describe the power consumption measurement method of audio equipment:

Power consumption measurement of audio, video and related equipment Part 4: Video recording equipment

1 Scope

This document describes the power consumption measurement method for video recording devices with removable media and gives various operations related to power consumption measurement:

model:

This document applies only to equipment that can be connected to a mains supply:

The measurement conditions in this document represent normal usage of the device and may differ from usage under specific conditions, such as those specified in safety standards:

The usage is different under certain conditions:

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document:

For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to this document:

GB/T 44021.1-2024 Measurement of power consumption of audio, video and related equipment Part 1: General (IEC 62087-1:2015, IDT) IEC 60107-1:1997 Methods of measurement for receivers for television broadcast transmissions Part 1: General considerations for radio and video frequencies Note: GB/T 17309.1-1998 Measurement methods for television broadcast receivers Part 1: General considerations for RF and video electrical performance measurements and display performance Measurement of energy (IEC 60107-1:1995IDT) DVB-T system)

3 Terms, definitions and abbreviations

3.1 Terms and Definitions the terms and definitions defined in GB/T 44021.1-2024 and the following apply to this document:

3.1.1

Additional functions Functions not required for basic operation of the device:

Note: Examples of additional functions include, but are not limited to, a VCR unit, a DVD unit, a hard disk unit, an FM radio unit, a memory card reader unit, or an environmental camera:

Bright unit:

3.1.2

Buffering

In order to accomplish the time-shifting functionality, some form of storage is used to temporarily store the video and audio streams: