Dolby E to DA88

[PeaceArch]

I'm hoping someone can help. I have an HDCAMSR 23.98 master. Channels 1/2 LT/RT 3/4, Stereo M/E 5/6, Dolby E containing 5.1 mix. I need to make a 29.97 DA88 with tracks 1-6 having the 5.1 and tracks 6/7 having LT/RT. I'm being told that this has to be done in two steps. Could the LT/RT not be dumped at the same time as the Dolby E is being decoded provided that proper delays are used?

[quadraphonics]

The work flow you describe could be done in one pass. Just make sure that you have pre-stripped the DA-88. You might run into some issues with the 23.98 vs 29.97 time code difference. The seconds will match, but the frames will not. Also, the Dolby -E stream isn't really a suitable archival format. Do you not have the source that created the Dolby-E?

Randall

Originally Posted by PeaceArch

I'm hoping someone can help. I have an HDCAMSR 23.98 master. Channels 1/2 LT/RT 3/4, Stereo M/E 5/6, Dolby E containing 5.1 mix. I need to make a 29.97 DA88 with tracks 1-6 having the 5.1 and tracks 6/7 having LT/RT. I'm being told that this has to be done in two steps. Could the LT/RT not be dumped at the same time as the Dolby E is being decoded provided that proper delays are used?

[PeaceArch]

Thanks Randall! Unfortunately its the only master we can get.

[pneyrinck]

Originally Posted by PeaceArch

I'm hoping someone can help. I have an HDCAMSR 23.98 master. Channels 1/2 LT/RT 3/4, Stereo M/E 5/6, Dolby E containing 5.1 mix. I need to make a 29.97 DA88 with tracks 1-6 having the 5.1 and tracks 6/7 having LT/RT. I'm being told that this has to be done in two steps. Could the LT/RT not be dumped at the same time as the Dolby E is being decoded provided that proper delays are used?

You need to be very careful regarding the sync of the Dolby E decode. Assuming you are using a DP572 to decode, the decode will probably be one 23.98 frame late. But that might not be the case because the encoding could have possibly compensated for that or it could even be two frames late if neither the encode or decode latency was compensated for. So, the LtRt might be one, two, or none frames out of sync with the Dolby E decoded audio.

Paul
Neyrinck Audio

[quadraphonics]

For a Dolby-E stream that would be correct. But it sounds like he will be decoding it and laying the resulting decoded 5.1 stream on to the DA88.

Randall

Originally Posted by Big Andy

I could be wrong here, but I though you needed to lay Dolby E off to a DA-98 because you can't record at 20bit on a DA-88. This is just what my engineers at paramount always told me.

[Big Andy]

Yeah I caught that after the fact. I tryied to delete my post before someone quoted me.