Pioneer PRV-9000 - Manual (Page 4)

How is the audio encoded in VR format?
The PRV-9000 can accept two channels of unbalanced audio. At the highest VR
video bit rate setting (10.08Mbps) the audio is encoded as Linear PCM (16bit-
48kHz-256kbps). In all other VR video bit rate settings the audio is encoded as
Dolby Digital (AC3) 2-channel audio (16bit-48kHz-256kbps).
Why does the PRV-9000 record in 30 second intervals when recording the
DVD-Video format?
The DVD-Video format DVD Forum specification requires DSI (Disc Search
Information) data to be contained on the user data stream of the DVD-Video disc.
The DSI must include the end time data associated with the video. When
authoring a DVD-Video disc with a computer-based system, one knows when the
video will end because it has pre-recorded, so it is clear on how to set this data in
the DSI.
However, when recording in real time one cannot predict exactly where the
conclusion of the video will be on the disc. But in order to adhere to the DVD-
Video spec, the DSI data must be present. Therefore, the PRV-9000 adds this
data every 30 seconds in the record process and recording must be done in 30-
second intervals. If the user stops recording between 30-second intervals, the
recorder will continue to record until it reaches a 30-second point in time.
This procedure is designed to insure content recorded by the PRV-9000
maintains maximum playback compatibility of DVD-Video format.
Why does the 30-second record interval not apply when recording in the
VR format?
The VR format is also a specification created by the DVD Forum. It is designed
as a simple way to record video and audio data onto a DVD. It does not require
much of the logical layer data included in DVD-Video formatted content. As
such, the DSI end point data is not required in the VR format.
Since the DSI end point data is not required, the PRV-9000 does not need to add
it and the recorder does not need to record VR formatted content in pre-defined
intervals. When the user stops the record process in VR format on the PRV-
9000, the recording process stops.
PRV-9000 FAQ 4 of 7 Last Revised: 11/15/01