This standard specifies the technical requirements and measurement methods for standard definition television digital video channels in television centers. Any equivalent measurement method that can ensure the same measurement uncertainty can also be used. In case of dispute, this standard shall prevail. This standard is applicable to the design, construction, maintenance, and acceptance of standard definition television digital video systems in the production, broadcasting, and control stages of television centers. The design, production, maintenance, acceptance, and operation of other related equipment and systems can refer to this standard. 2 Normative References: The clauses in the following documents become clauses of this standard through reference in this standard. For dated reference documents, all subsequent amendments (excluding corrected content) or revisions are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standard. GB/T 14857 Specification for Encoding Parameters of Digital Television in Studios GB/T 17953 4:2:2 Interface for Digital Component Image Signals GB/T 18472 Test Signals for Digital Encoded Color Television Systems GY/T 134 Subjective Evaluation Methods for Image Quality of Digital Television GY/T 160 Auxiliary Data Signal Format in Digital Component Studio Interface GY/T 161 Transmission Specification for Digital Audio and Auxiliary Data in Digital Television Auxiliary Data Space GY/T 228 Subjective Evaluation of Standard Definition Digital Television Using test images
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China