This RDD is for media at the integer or fractional base-rates of 24, 24/1.001, 25, 30, 30/1.001 Hz and their integer multiples. This RDD describes a UTC Compensated Count (UCC) algorithm that... View More
This RDD is for media at the integer or fractional base-rates of 24, 24/1.001, 25, 30, 30/1.001 Hz and their integer multiples. This RDD describes a UTC Compensated Count (UCC) algorithm that defines the generation of media counts with a symmetric and mathematically precise relationship to the local calendar date and time. From the calendar date and UTC offset this UCC algorithm, determines the phase offset from midnight to the start of the first media block of the timecode day and the media counts throughout the day. The media count converted to a SMPTE ST 12-1 time address inherits the precision relationship to the local time-of-day and also to media at other rates. For rates at integer multiples of the base-rates the time address frame count extensions can be coded in the binary groups along with date, UTC offset, DTAI, user data and other operational metadata. The extra media counts for 30 Hz related fractional rates that exceed the normal 24 hour time address labels and labels for leap seconds can be coded in extended labels at the end-of-day. The RDD supports coding of data into the binary groups using the SMPTE ST 262 page-line multiplex or optionally the SMPTE ST 309 protocols.
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