GB/T 33665-2023
Audio and video technical requirements and detection methods for digital publications (English Version)
- Standard No.
- GB/T 33665-2023
- Language
- Chinese, Available in English version
- Release Date
- 2023
- Published By
- General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China CN / GB
- Latest
- GB/T 33665-2023
- Replace
- GB/T 33665-2017
- Introduction
GB/T 33665—2023 Standard Interpretation
GB/T 33665—2023, the National Standard of the People's Republic of China, "Technical Requirements and Test Methods for Audio and Video of Digital Publications", is an important standard for regulating the quality of audio and video in the field of digital publishing. Compared with the old version GB/T 33665—2017, the new standard has made many improvements and updates in technical parameters, term definitions and test methods.
Comparison of Standard Frameworks
Items Improvements in the New Standard Contents Used in the Old Standard Deleted Definitions Added Technical Requirements Retained Core Terms Optimization of Detection Methods Interlaced Scan Added Ultra High Definition Video Parameters (4K/8K) Channel and Surround Sound Definitions Update of Detection Equipment Progressive Scan Added Technical Requirements for 3D Sound Encoding Format Requirements Storage media expansion (such as mobile hard disk) Core parameter interpretation
High-quality audio requirements: Dual-channel needs to reach a sampling frequency of 192kHz, surround sound and 3D sound need to reach 96kHz, and the quantization accuracy is 24bit. These parameters ensure that the sound quality of digital publications reaches professional standards.
Ultra-high-definition video standards: Support 16:9 aspect ratio, 8K resolution (7680x4320) and progressive scan mode. New technical requirements include higher frame rate (120Hz) and precise color coordinate parameters to ensure more delicate visual presentation.
Implementation recommendations
- Related enterprises are advised to strictly follow the GB/T 33665-2023 standard during the production process to ensure that the audio and video quality meets the standards.
- For enterprises upgrading their technology, it is recommended to use ultra-high-definition equipment to meet the production needs of 4K and 8K content.
- In the testing phase, it is recommended to use professional equipment that meets the technical requirements of GB/T 31493 and calibrate the equipment regularly to ensure the accuracy of the test.
GB/T 33665-2023 Referenced Document
- GB/T 31493-2015 Technical requirements for digital audio video analyzer
- GB/T 33663-2017 General testing parameters of read-only optical disc publication(CD、DVD)
GB/T 33665-2023 history
- 2023 GB/T 33665-2023 Audio and video technical requirements and detection methods for digital publications
- 2017 GB/T 33665-2017 Technical requirements and detecting method of audio and video program for digital publication
