DVR-7000
Chapter
Original
Title 1
Title 2
Title 3
Title 4
Play list 1
Fig. 2 Recorded content model
Table 2 General Specifications of Presentation Data
Data Systems
MPEG-2 system stream / program stream
Maximum program_mux_rate = 10.08Mbps
Video
number of stream
: 1
compression
: Complies with MPEG-2 or MPEG-1
bit rate
MPEG-2
: 9.80 Mbps or less
MPEG-1
: 1.856 Mbps or less
Audio
number of streams
: 2 max
coding mode
: Linear PCM / Dolby AC-3 / MPEG
Linear PCM
Dolby AC-3
MPEG-1
MPEG-2
sampling frequency
48kHz
48kHz
48kHz
48kHz
bits per sample
16bits
compressed
compressed
compressed
bit rate (max.)
1.536Mbps
448 kbps
384kbps
912kbps
number of channels
2 max.
5.1 max.
2 max.
7.1 max.
Sub-picture
number of streams
: 1 max.
data type
: Run-length coded bitmap , 2-bit/pixel
data size of a picture
: 52KB max.
display area
colors
: a rectangular in a frame
: 16 colors palette for each VOB
TV system with 525 / 60
TV system with 625 / 50
: 720(H)
×
478(V) max.
: 720(H)
×
537(V) max.
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.
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.
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.
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.
