|Guideline for the External Reference Signal of 1125 HDTV Studio Equipment Overview of Technical Report (ARIB TR-B20)
This technical report stipulates the definition of the in-phase relationship between ternary synchronization signal used for 1125 system HDTV studio apparatuses and SDTV black burst signal, the standard values of the phase relationship between an external reference signal and a video signal, the allowable value for the video phase difference in relation to the reference signal, and a measurement method therefor.
This technical report shall apply to HDTV studio apparatuses for the handling of 1125/60 system HDTV signal stipulated by ARIB standard BTA S-001B, or HDTV signals of 1125/50, 1125/24P, and 1125/30P systems and the like that are extended signal thereof.
2. Composition and overview
This technical report is composed of the main section consisting of the following five chapters, and its explanatory annexes and addenda attached thereto.
Chapter 1: Object
Chapter 2: Scope
Chapter 3: Explanation of Terms
Chapter 4: Related Standards
Chapter 5: External Reference Signal of 1125 system HDTV
5.1 External reference signal of an 1125/59.94/I image
5.2 Phase relationship between an 1125/59.94/I image and a 525/59.94/I image
5.3 External reference signal of 1125/30P, 30/PsF, 29.97/PsF, 25/P, 25/PsF, 24/P, 23.98/P, 23.98/PsF, 60/I, and 50/I images
5.4 Allowable range of the 1125 image output phase to external reference signal
(Explanation of the grounds for the recommended values given in this technical report and important points in operation of synchronization signals based on this technical report)
(Results of research on the operational status of the synchronization signal of HDTV apparatuses in Japan carried out while this technical report was being compiled)