Pioneer DVR-7000 Service Manual page 23

3.2.2 Video Recording Format
The DVD Forum created the DVD-Video format as an application
format. As this format was created mainly for the authoring systems
for a PC environment and intended to reduce the burden on playback-
only players, its data structure is not suitable for real-time recording.
As the DVD-Video format was for ROM discs, which do not require
addition of descriptions or edition by users, its fairly complex
structure posed little trouble for authoring systems. Therefore, the
format contained various items that allowed content producers to
use various functions, such as multiangle, multistory, various menus,
multilanguage, commands, and high picture/sound quality.
Table 2 General Specifications of Presentation Data
Data Systems
Video number of stream
compression
bit rate
Audio number of streams
coding mode
sampling frequency
bits per sample
bit rate (max.)
number of channels
Sub-picture number of streams
data type
data size of a picture
display area
colors
Fig. 2 shows a recorded content model. The original represents an
image of a group of titles previously recorded on a VCR and now
actually recorded on a disc. Up to 99 titles can be recorded on a
disc. A title may be actually recorded on noncontinuous areas, but
for users, it appears to be recorded continuously.
The play list is a program created from time information of actual
original titles, and a virtual title is composed only of management
information.
Original
Play list 1
MPEG-2 system stream / program stream
Maximum program_mux_rate = 10.08Mbps
MPEG-2
MPEG-1
Linear PCM
1.536Mbps
: 1 max.
: Run-length coded bitmap , 2-bit/pixel
: 52KB max.
: a rectangular in a frame
TV system with 525 / 60
TV system with 625 / 50
Title 1 Title 2
Fig. 2 Recorded content model
In comparison, in considering the use for general users' recording/
playback use, such as VCR, Camcorder, and MD, the Video
Recording format was defined to respond to the following requests:
1. Real-time recording
2. Easy to edit/operate
3. High picture quality
4. Efficient usage of available area on a disc
Table 2 shows the outline of Video Recording format data.
: 1
: Complies with MPEG-2 or MPEG-1
: 9.80 Mbps or less
: 1.856 Mbps or less
: 2 max
: Linear PCM / Dolby AC-3 / MPEG
Dolby AC-3
48kHz 48kHz
16bits compressed
448 kbps
2 max. 5.1 max.
: 720(H) × 478(V) max.
: 720(H) × 537(V) max.
: 16 colors palette for each VOB
Any portions of titles can be selected in any order with accuracy to
one video frame in a play list. Up to 99 play lists can be created.
Both original titles and play lists can contain chapters.
Chapter
Title 3
DVR-7000
MPEG-1 MPEG-2
48kHz 48kHz
compressed compressed
384kbps 912kbps
2 max. 7.1 max.
Title 4
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