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(4) Playing time
Recorded
content
Recording bit rate
Recording time
(example)
Video
+
audio
3 Mbps
(including 128 kbps x 2 ch audio)
2 min.
The playing time on the DN-V1700 depends on the capacity of the card and the playback bit rate.
Below is a description of basic methods for calculating the playing time and some examples.
2 Video + audio
Video playback bit rate (kbps) x playing time (sec.) = capacity of video portion
Audio playback bit rate (kbps) x playing time (sec.) x 2 (2 channels, left and right) = capacity of audio portion
Capacity of video portion + capacity of audio portion = Total capacity (kbit)
Total capacity (kbit) ÷ 8 = Total capacity (kByte)
Total capacity (kByte) ÷ 1024 = Total capacity (required card capacity) (MByte)
2 Video only
Video playback bit rate (kbps) x playing time (sec.) = Total capacity (kbit)
Total capacity (kbit) ÷ 8 = Total capacity (kByte)
Total capacity (kByte) ÷ 1024 = Total capacity (required card capacity) (MByte)
2 Still pictures
Still pictures capacity per image (kbit) ÷ 8 = Total capacity (kByte)
Total capacity (kByte) ÷ 1024 = Total capacity (required card capacity) (MByte)
2 Audio only (MPEG1 Audio Layer 2)
Audio playback bit rate (kbps) x playing time (sec.) x 2 (2 channels, left and right) = Total capacity (kbit)
Total capacity (kbit) ÷ 8 = Total capacity (kByte)
Total capacity (kByte) ÷ 1024 = Total capacity (required card capacity) (MByte)
2 Audio only (16 bit Linear PCM)
16 (bits) x sampling frequency (kHz) x playing time (sec.) x 2 (2 channels, left and right) = Total capacity (kbit)
Total capacity (kbit) ÷ 8 = Total capacity (kByte)
Total capacity (kByte) ÷ 1024 = Total capacity (required card capacity) (MByte)
[Example] Calculations of required capacities
Capacity
045 MB
Formula
3 x 120 ÷ 8 = 45
8 Mbps
(including 128 kbps x 2 ch audio)
2 min. 120 MB 8 x 120 ÷ 8 = 120
Audio only
MPEG 128 kbps 60 min. 113 MB 128 x 3600 x 2 ÷ 8 ÷ 1024 = 113
16 bit Linear PCM 48 kHz
10 min.
225 MB 16 x 48 x 600 x 2 ÷ 8 ÷ 1024 = 225
Still pictures 100 kB x no. pictures 500 049 MB 100 x 500 ÷ 1024 = 49
Still pictures
+
audio
100 kB x no. pictures
Audio MPEG 128 kbps
500
60 min.
162 MB 100 x 500 ÷ 1024 + 128 x 3600 ÷ 8 ÷ 1024 = 162