Sony RDR-GX7 - Manual (Page 3)

DVD-Video disc has now become the standard for enjoying
movies and concerts with high quality images and sound.
Since the introduction in 1996, its growth in popularity has
been phenomenal. Not only are DVD players more
mainstream, but also DVD drives can be found in many
audio-visual, computer and video game products. With DVD
playback now possible from a wide variety of equipment,
DVD can now be enjoyed in many different ways and
applications.
Thanks to recordable DVD, the high quality images,
superior sound quality and remarkably versatile functions
provided by DVD can now be applied to home recording on a
digital disc. Furthermore, DVD can also be used as a high
capacity storage media for personal computers.
The merits of DVD recording
There are quite a number of advantages to recording television
programs and archiving personal video recordings onto optical
discs.
■ High quality images –
high quality digital sound recording
Recordable DVD digitally records video using the same MPEG-
2 format used in DVD-Video disc, while audio is digitally
recorded using Dolby Digital, with other possible formats. This
ensures extremely high quality video and audio recording, while
offering a high degree of playback compatibility with
conventional DVD players.
■ CD size, but with large recording capacity
One side of a DVD can hold up to 4.7 Gbytes, approximately
seven times the capacity of a CD. This high data capacity permits
extended video and audio recording. As DVDs are the same size
as CDs, just 12 cm in diameter and only 1.2 mm thick, even a
large video collection takes up very little space.
■ High-speed access for playback and editing
One major feature of disc media is quick random access for
superior convenience. For example, during playback, the
recorded contents can be confirmed by calling up the on-screen
menu. A desired portion can then be selected for quick playback.
Even for recording, there is no need to worry about the starting
position like with tape. Just press the Record button and
recording operation can quickly begin on available blank space
on the disc.
■ Superior storage characteristics
Since the signal is read by non-contact laser pickup, there is no
gradual deterioration in image or sound quality, no matter how
may times the disc is played back. In addition, there is no
stretching or print-through as with tape, just high quality images
and sound, always. Furthermore, as the system is digital,
powerful error correction systems can be used to ensure greater
resistance against dirt and scratches, for highly reliable playback.
■ Compatible recording for playback
in a wide variety of places
Discs recorded can be played on most conventional DVD
players, allowing them to be used in many different ways, such
as “video messages” to relatives. Playback is also possible in a
car, or on a video game console.
■ Non-linear editing on disc
With tape media, since editing requires dubbing from tape to
tape, even simple editing procedures like erasing unwanted
scenes requires a lot of time because the entire content must be
recorded over again. Moreover, if the result isn't satisfactory, this
time consuming process must be repeated again from the start.
However, with recordable DVD, editing can be performed on the
disc itself. Unwanted scenes can be eliminated almost instantly
with a simple operation. In addition, the order of the scenes may
be changed, with new titles created for collections of multiple
scenes, thereby offering highly versatile editing.
Chapter 1
The Era of Recordable
DVD
DVD players have become very popular.
Now, the era of recordable DVD has finally arrived.
RDR-GX7 Technical Notes
3
video recording
High quality digital recording of
audio and video
MPEG-2
audio recording
Dolby Digital
Linear PCM
MPEG audio
4.7 Gbytes per DVD
CD 640 MB 7
Primary recording formats of recordable DVD
High data capacity of DVD
Note: there is also a
specification for an 8 cm
DVD with 1.46 Gbytes
capacity
recordable DVD
DV
Oh, let’s watch
from this scene VHS
Broadcast
Digital Video
Enjoying various sources conveniently on DVD
recordable DVD
analog tape
repeated playback
repeated playback
Durability of DVD
Enjoy DVD!
Thank you.
Various ways of
enjoying DVD