American Dynamics EDVR Calculator User manual

EDVR
EDVR Calculator User Guide
Version 1.0
Part Number 8200-0826-01 AO

EDVR Calculator User Guide
2
Notice
The information in this manual was current when published. The manufacturer reserves the right to revise and improve its
products. All specifications are therefore subject to change without notice.
Copyright
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electronic medium or machine-readable form, in whole or in part, without prior written consent of Sensormatic Electronics.
©Copyright 1997-2005, Sensormatic Electronics Corporation.
American Dynamics
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San Diego, CA 92121-2903 U.S.A.
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Table of Contents
1. Introduction ................................................................................................................................4
2. The Calculator Utility..................................................................................................................5
General Information............................................................................................................... 5
Known Limitations.................................................................................................................. 5
How To Read The Screen ..................................................................................................... 6
Example - Scenario 1 .......................................................................................................... 11
Example - Scenario 2 .......................................................................................................... 14
3. Understanding Alarm Record Rate and Alarm Record Mode..................................................17
Alarm Record Rate .............................................................................................................. 17
Alarm Record Mode............................................................................................................. 17
4. The Computation Algorithm .....................................................................................................18
Normal Record Mode........................................................................................................... 18
Alarm Record Mode............................................................................................................. 18
5. Possible Recording Time Tables for EDVR v1.44A.................................................................20
Recording Rate = 60 IPS......................................................................................................20
Recording Rate = 30 IPS......................................................................................................21
Recording Rate = 1 IPS........................................................................................................22
6. Possible Recording Time Tables for EDVR v1.53A and Later ................................................23
Recording Rate = 60 IPS......................................................................................................23
Recording Rate = 30 IPS......................................................................................................24
Recording Rate = 1 IPS........................................................................................................25

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1. Introduction
The Calculator utility is a companion for American Dynamic’s Embedded Digital Video Recorder
(EDVR). The purpose of this utility is to assist users in estimating how much record time is
attainable in their EDVR systems with a known hard disk drive (HDD) size. It can also be used to
estimate how much hard drive space is needed for a target recording duration.
The user is advised to go through Sub-sections 4 Alarm Record Rate and 5 Alarm Record Mode
on pages 48 and 49 of the Installation and Operation Guide v1.54 (and later), for a full
explanation of the topics. Releases prior to this version do not contain adequate information in
these areas. These sections form the basis of the computation algorithm detailed in Section 4 of
this Calculator User Guide.
It is important to note that, starting from v1.54, the User's Guide no longer contains the Possible
Recording Time Tables. The tables previously released in v1.44A and v1.53A contain errors and
should no longer be used. They are corrected and included in this document as sections 5 and 6
respectively. The table in section 6 is applicable to v1.53A and all later releases.
Note
The compression rate of STANDARD in v1.53A and up corresponds to that of BASIC in v1.44A.
A higher compression rate is used in BASIC of v1.53A and up. This change enables longer
recording time when the camera quality and image contents give acceptable recorded image
quality.

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2. The Calculator Utility
General Information
Applicable to FW v1.44A or 1.53A and up.
On the User Interface, red text highlights fields which are automatically selected or
calculated.
Calculate either record time on 10 GB HDD, or the HDD size to be consumed after 1
day of recording.
Calculate recording time/HD size in the presence or absence of audio.
Calculate recording time/HD size when alarm is either active or not.
Known Limitations
Issue Description
One quality setting applies to
all channels. EDVR provides options to set each channel’s record quality at 4 different levels of recording image; the EDVR Calculator v1.03 only
supports one global setting of record quality.
Under a special condition, the
Record Time computed by the
Calculator cannot be reached
by the EDVR. This is a
limitation of the EDVR rather
than the Calculator.
When 4 cameras are present, and alarm recording is triggered in a
single camera set up at Exclusive or Interleave alarm mode, the
alarm camera will be the only one recorded for the alarm duration. If
the alarm record rate is set at equal to or greater than the maximum
rate allowed (30 images per second (IPS) for NTSC and 25 for
PAL), this camera is expected to record at the maximum allowed
rate from the computation of Calculator v1.03.
In fact, the system will not be able to achieve this maximum record
rate. Depending on the content of the images, the actual rate can
be 3 to 5 IPS lower than the maximum. This translates into 25-27
IPS for NTSC and 20-22 IPS for PAL.

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How To Read The Screen
1. Default screen.

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2. Calculate Record Time on a 10 GB hard drive.

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3. Calculate hard drive size needed for 1 day of Record Time.

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4. Calculate Record Time when alarm is active.

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5. Calculate Record in the presence of audio.

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Example - Scenario 1
I have a system of 4 cameras on NTSC and no audio. I have the following setup:
Normal record at 5 IPS
Schedule1 for 12 hr of recording on alarm trigger at alarm record rate 5 IPS
Schedule1 alarms are all set to Interleave mode.
How do I use the Calculate function to figure out the record time on a 160 GB hard drive,
assuming 50% (6 hr) of the Schedule1 duration is in alarm-triggered recording?
1. Normal Record Mode: Estimate HD space needed for 12 hours of normal recording.

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2. Schedule1 Alarm Record Mode: Estimate HD space needed for 12 hours of alarm
recording at 50% of the time, or 6 hours (continued from the last section).

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3. Schedule1 Normal Record Mode: Estimate HD space needed for the other 50% of
time (6 hours) when alarm is off (continued from the last section).
4. Compute HD space needed during 24 hours from steps 1–3 above:
HD space = (6 + 3 + 3 +/- 0.7) GB
= 12 +/- 0.7 GB
5. Compute recording time attainable on a 160 GB HD:
Record Time = 160/12.7 to 160/11.3 Days
= 12.6 to 14.16 Days
= 13.38 +/- 0.78 Days

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Example - Scenario 2
Everything is set up the same way as Scenario 1 except that Schedule1 alarms are all set to
Exclusive mode. How do I do the calculation now?
1. Normal Record Mode: Estimate HD space needed for 12 hours of normal recording.

EDVR Calculator User Guide
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2. Schedule1 Alarm Record Mode: Estimate HD space needed for 12 hours of alarm
recording at 50% of the time, or 6 hours (continued from the last section).

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3. Schedule1 Normal Record Mode: Estimate HD space needed for the other 50% of
time (6 hours) when alarm is off (continued from the last section).
4. Compute HD space needed during 24 hours from steps 1–3 above:
HD space = (6 + 12 + 3 +/- 1.1) GB
= 21 +/- 1.1 GB
5. Compute recording time attainable on a 160 GB HD
Record Time = 160/22.1 to 160/19.9 Days
= 7.24 to 8.04 Days
= 7.64 +/- 0.4 Days

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3. Understanding Alarm Record Rate and Alarm Record Mode
Alarm Record Rate
Please see 4. Alarm Record Rate, on page 48 of the EDVR Installation and Operation Guide
v1.54 (or later). IOGs of earlier releases do not contain adequate information.
Alarm Record Mode
Please see 5. Alarm Record Mode, on page 48 of the EDVR Installation and Operation Guide
v1.54 (or later). IOGs of earlier releases do not contain adequate information.

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4. The Computation Algorithm
Normal Record Mode
Alarm Record Mode
Alarm Camera: Cameras are in the alarm state.
Non-Alarm Camera: Cameras are not in alarm state.
If CH1~CH16 are set to the same Alarm Record Mode, the expected record rate can be
derived from the table below.

EDVR Calculator User Guide
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Example
System configuration is as below.
Alarm record rate = 60 IPS
Camera Alarm mode Alarm active IPS
1 Interleaved Yes 15
2 Interleaved Yes 15
3 Interleaved Yes 15
4 Interleaved No 1.875
5 Double Yes 3.75
6 Double Yes 3.75
7 Double No 1.875
8 Normal Yes 1.875
9 Normal No 1.875
1. Alarm record rate is 60 IPS. A = 60
2. Number of active alarm cameras is 3. N = 3
We can calculate the IPS for cameras 1, 2, 3. The IPS is 60/(3+1) = 15
3. Rest IPS is B. B = A/(N+1) = 60/(3+1) = 15
4. Number of active alarm cameras with Double mode setting is 2. P = 2
5. Number of other cameras is 4. R = 4.
6. We can calculate the IPS for the double mode cameras 5 and 6.
The IPS is 2*B/(2P+R) = 2*15/(2*2+4) = 3.75
7. We can calculate the IPS for the other cameras 4, 7, 8, 9.
8. The IPS is B/(2P+R)= 15/(2*2+4) = 1.875

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5. Possible Recording Time Tables for EDVR v1.44A
The quality of each image will lead to a range of picture sizes, depending on the quality of the
camera and the image content. The ranges are:
BEST: 38K ~ 42K
HIGH: 30K ~ 34K
STANDARD: 22K ~ 26K
BASIC: 14K ~ 18K
The center points of these ranges, 40K for BEST, 32K for HIGH, 24K for STANDARD and
16K for BASIC, are used to compute the estimation of recording period in the following
tables.
Note
Depending on the picture content and the camera quality, a variation up to 5%, 6%, 8% and 12% for
the four quality settings may be encountered in reality.
Recording Rate = 60 IPS
Recording Rate = 60 IPS, Possible Recording Time ( hour )
Capacity HDD=40G
HDD=80G
HDD=100G
HDD=160G
HDD=200G
HDD=250G
HDD=300G
Best 4.6
9.3 11.6
18.5
23.2
28.9
34.7
High 5.8
11.6 14.5
23.2
28.9
36.2
43.4
Standard 7.7
15.4 19.3
30.9
38.6
48.2
57.9
Basic 11.6
23.2
28.9
46.3
57.9
72.3
86.8
Best + Audio
(8K) 4.6
9.2
11.5
18.5
23.1
28.8
34.6
High + Audio
(8K) 5.8
11.5
14.4
23.1
28.8
36.0
43.2
Standard +
Audio (8K) 7.7
15.4
19.2
30.7
38.4
48.0
57.6
Basic + Audio
(8K) 11.5
23.0 28.7
45.9
57.4
71.7
86.1
Best + Audio
(22K) 4.6
9.2 11.5
18.4
22.9
28.7
34.4
High + Audio
(22K) 5.7
11.4 14.3
22.9
28.6
35.8
42.9
Standard +
Audio (22K) 7.6
15.2 19.0
30.4
38.0
47.5
57.0
Basic + Audio
(22K) 11.3
22.6 28.3
45.3
56.6
70.7
84.9
Best + Audio
(44K) 4.5
9.1 11.4
18.2
22.7
28.4
34.1
High + Audio
(44K) 5.7
11.3
14.1
22.6
28.3
35.4
42.4
Standard +
Audio (44K) 7.5
15.0 18.7
29.9
37.4
46.8
56.2
Basic + Audio
(44K) 11.1
22.1 27.7
44.3
55.3
69.2
83.0
Note
Must have 2 or more cameras to utilize the aggregate record rate over 30 IPS. Audio is based on
MONO for this table. Audio in Stereo will lead to Record Time reduction ranging from <1% for Best +
Audio (8K) to 5% for Basic + Audio (44K).