Sony RDR-GX7 - Manual (Page 5)

4.7 GB
4.7 GB
Image quality
Image quality vs. recording time
10 Mbps
6 Mbps
4 Mbps
2 hours 3 hours 6 hours 1 hour
Recording time
High Quality Picture and Sound Recording
2-channel audio
Video
2 hour recording
Linear PCM audio
5.2 Mbps
transmission
rate
Even if the total transmission rates and recording times are the same,
emphasis can be placed on either high sound quality or high picture quality
depending upon the allocation ratio of the audio and video signal portions.
3.554 Mbps
video transmission
rate
1.536 Mbps
audio transmission
rate
2-channel audio
Video
2 hour recording
Dolby Digital audio
4.994 Mbps
video transmission
rate
0.256 Mbps
audio transmission
rate
(bps = bits per second)
Compact optical disc with large data capacity.
The relationship between image quality and recording time.
Recording time on a given disc varies
according to the data transmission rate. If the
rate is high, image quality is better, but
recording time is shorter. If the rate is lowered,
recording time is longer, but at the expense of
image quality. Moreover, even with the same
recording time, image quality can change
depending upon the format for audio recording.
4.7 GB per DVD
CD 7
DVD
VHS tape
12 cm discs are easy to handle, easy to store.
DVDs are the same size as CDs, just 12 cm and only 1.2 mm thick. Even
a large video collection takes up very little space. Plus, they're easy to
carry and send.
5
A DVD in its case is still 1/3 the volume of a VHS tape.
Note: There is also a format specification for an 8 cm DVD which holds 1.46 GB of data.
By varying the transmission
rate, priority can be placed
either on image quality or
on longer recording time.
Common features of
writable DVD
2
A DVD holds seven times as much data as a CD.
One side of a DVD can hold up to 4.7 GB, about seven times a CD
holds. This high data capacity enables longer recording of video
and audio.