Dolby Laboratories DP569 User Manual
Model DP569 User’s Manual
SMPTE Time Stamp
B–2
timecode values to occur within a single audio access unit. In this case, the timecode
value that applies to the earliest sample in the access unit is used.
value that applies to the earliest sample in the access unit is used.
It should be recognized that the time stamp values will have a small amount of
inherent jitter. The sources of the jitter could be, for example, the ±1 sample
ambiguity in relating timecode to an exact sample value or bandwidth limitations in
the source of linear timecode.
inherent jitter. The sources of the jitter could be, for example, the ±1 sample
ambiguity in relating timecode to an exact sample value or bandwidth limitations in
the source of linear timecode.
TS
n
AC-3 Frame n
TS
n+1
AC-3 Frame n+1
Sample Sn
Sample Sn+1
Time Stamp n contains the
time information for sample
Sn in AC-3 frame n
time information for sample
Sn in AC-3 frame n
Time Stamp n+1 contains the
time information for sample
Sn+1 in AC-3 frame n+1
time information for sample
Sn+1 in AC-3 frame n+1
If the value of sample number Sn contained in time
stamp n is >= 1536 (the number of samples in an AC-3
frame), it points to sample 1536-Sn in AC-3 frame n+1
stamp n is >= 1536 (the number of samples in an AC-3
frame), it points to sample 1536-Sn in AC-3 frame n+1
Increasing Time
Figure B-2 Time Stamps and AC-3 Frames in the IEC958 Datastream