This standard specifies the subjective evaluation method for digital television image quality. This standard is applicable to the subjective evaluation of the performance of digital television systems. 2. The following standards contain provisions that constitute the text of this standard through reference in this standard. When the standard is published, all versions indicated are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T7401-1987 Subjective Evaluation Method for Color Television Image Quality 3 Terminology The wooden standard adopts the following definitions. 3.1- Subjective Assessment - A method of directly utilizing the subjective response of the observer to the quality of the tested system to determine the performance of a television system. 3.2 Quality assessment is a subjective evaluation of the performance of a television system under optimal conditions (i.e. ideal viewing conditions). 3.3 Damage Assessment: The subjective evaluation of the system's quality performance under non optimal conditions such as transmission and transmission
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