Question:
According to the DVD specifications, all discs have to have a Dolby Digital Soundtrack of one sort or another (this is why old films have a DD - albeit mono - soundtrack).
But DD2.0 seems to mean both Stereo and Prologic.
Surely Prologic encoded tracks should be DD4.0 (left/right/centre/rear). I've been wondering why It's described as 2.0 for some time.
I think its cos prologic is not digital and the extra channels (front and rear) is extracted from the stereo track.
AFAIK - DD4.0 indicates a track with dedicated stereo rears, unlike Pro-logic which has a matrixed rear mono channel taken from the DD2.0 stereo signal.
:dork:
Originally posted by kiran_mk2
According to the DVD specifications, all discs have to have a Dolby Digital Soundtrack of one sort or another.
Saving Private Ryan DTS ?.
Saving Private Ryan DTS ?.
As with all DTS discs, it should have a DD2.0 track also..
ya, SPR:DTS has a Dolby Surround track as well
NTSC DVDs may contain a PCM soundtrack rather than a Dolby Digital soundtrack, and PAL discs a PCM or MPEG soundtrack. Dolby Digital isn't mandatory, but is used in most cases as it requires so little space.
Adam
If L, R, C, S are the front left, front right, front center and surround tracks of prologic, then the encoded stereo tracks L' and R' are
L'=L+0.707C+0.707S
R'=R+0.707C-0.707S
0.707 being the square root of 0.5.
;).
But DD2.0 seems to mean both Stereo and Prologic.
Surely Prologic encoded tracks should be DD4.0 (left/right/centre/rear). I've been wondering why It's described as 2.0 for some time.
Answers:
I think its cos prologic is not digital and the extra channels (front and rear) is extracted from the stereo track.
Answers:
AFAIK - DD4.0 indicates a track with dedicated stereo rears, unlike Pro-logic which has a matrixed rear mono channel taken from the DD2.0 stereo signal.
:dork:
Answers:
Originally posted by kiran_mk2
According to the DVD specifications, all discs have to have a Dolby Digital Soundtrack of one sort or another.
Saving Private Ryan DTS ?.
Answers:
Saving Private Ryan DTS ?.
As with all DTS discs, it should have a DD2.0 track also..
Answers:
ya, SPR:DTS has a Dolby Surround track as well
Answers:
NTSC DVDs may contain a PCM soundtrack rather than a Dolby Digital soundtrack, and PAL discs a PCM or MPEG soundtrack. Dolby Digital isn't mandatory, but is used in most cases as it requires so little space.
Adam
Answers:
If L, R, C, S are the front left, front right, front center and surround tracks of prologic, then the encoded stereo tracks L' and R' are
L'=L+0.707C+0.707S
R'=R+0.707C-0.707S
0.707 being the square root of 0.5.
;).
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