Digital Video Management System Designer’s Guide Spring 2001 edition GyyrDVMSDesignGuide01-01.
Table Of Contents OVERVIEW .................................................................................................................. 4 BENEFITS OF DIGITAL VIDEO RECORDING ............................................................... 4 GYYR DVMS DESIGN OBJECTIVES ............................................................................. 5 HARDWARE ARCHITECTURE ...................................................................................... 5 CHASSIS ARCHITECTURE ..........................
Remote Live Viewing options.............................................................................................................................................16 Remote Audio/Text Enable.................................................................................................................................................16 Recording of Live View to PC Hard Drive ........................................................................................................................
Overview Gyyr’s DVMS family provides a high performance, integrated digital video recording solution. DVMS seamlessly blends video and data storage, with powerful search tools to review specific scenes. Async text insertion ports are included for each video input, which allow connection to a variety of transaction devices such as ATMs and Cash Registers. Gyyr’s Wavelet compression engine greatly reduces storage requirements yet retains the nuances and detail from the source cameras.
Gyyr DVMS Design Objectives Nowadays it isn’t too difficult to design a Digital Video Recorder using a relatively low cost, fast PC. All it takes is a clever software engineer to cobble together a video capture card, simple switching circuitry and a nice GUI to make an inexpensive recorder. In fact, many of the Security DVR’s currently on the market are just that. The easy road to the destination is not without major limitations. The best solution is a clean sheet approach.
Hard Drive Options and Recommendations Model: Drive Interface: Internal HD Archive Drives Available: Sizes Available: DVMS 400 SCSI DVSM 100 IDE DVMS 100 SCSI 9 GB Std 18 GB Extended *70GB Max 27 GB Std 40 GB Extended 72 GB Max 9 GB Std 18 GB Extended *70GB Max Removable HD, Jaz, DVD-RAM Removable HD only Removable HD, Jaz, DVD-RAM *Available only in Lower, fixed position 1 The DVMS 400 chassis accommodates SCSI drives only. DVMS 100 can be configured for either SCSI or IDE drives, but not both.
SCSI: Standard 9GB, Extended 18GB, Max 70GB Note that some size categories are listed as a range, like “27-30GB”. This means that when you order a standard IDE HD size, you’ll get a minimum of 27GB or storage, and the drive could possibly be as big as 30GB. You cannot specify the larger of the range, as the capacities vary slightly from HD manufacturer to another. External SCSI Hard Drive Solutions Gyyr will soon have an optional external Hard Drive case for additional SCSI Hard Drives.
Product Selection FAQ Which version of DVMS 100 is best for me? For applications that can be satisfied with a maximum of 2 hard drives, the best choice is IDE configuration. This will provide the lowest cost per GB of storage. For applications requiring more than (2) hard drives, or Jaz/DVDRAM storage, choose the SCSI configuration. Remember that the DVMS 100 can be configured for IDE or SCSI devices, but not both. Which DVMS model is best for me? DVMS 400 is an Integrated System product.
Understanding the limitations of both types of drives, the Jaz disk is best for high speed transfer and access to data. It can access data 4-8 times faster than DVD-RAM. So if you need to dump a lot of data quickly, and to move it, specify the Jaz drive. It is nearly as fast as a conventional HD, and will provide superior high-speed play than the DVD-RAM. If speed isn’t terribly important, but price is, then the DVD-RAM is preferable. DVD-RAM can store up to 2.
Pre-Configured System Accessories DVMS System Accessories Gyyr Model#: Description: DV-MOD-A PC Modem Card for Telephone line connectivity DV-NET-A PC LAN Card for Ethernet connectivity DV-SHD-A Extended Capacity SCSI Hard Drive with Tray; (Removable Hard Drive) DV-IHD-A Extended Capacity IDE Hard Drive with Tray; (Removable Hard Drive) DV-ID-B-A IDE Drive Bay and Tray DV-ID-T-A Extra IDE Drive Tray (For IDE Removable Hard Drive Bay) DV-ID-S-A Extra Standard Capacity IDE Hard Drive DV-ID-E-
IDE drives, both internal. As Gyyr does not currently stock these drives, the System Integrator could order DVMS without any Hard Drives (IDE configured). The System Integrator would source the approved drives through a third party, and do the installation themselves. Calculating Recording Duration/Storage Needs Image File Sizes An uncompressed NTSC field of video equals: 720 H.
Hours per Gigabyte (Per Camera) Compression ratio (X:1) Fields per second 10 15 20 25 30 Highest Quality 35 Lowest Quality 60 0.13 0.19 0.26 0.33 0.39 0.46 30 0.26 0.39 0.52 0.66 0.79 0.92 15 0.52 0.79 1.05 1.32 1.58 1.85 10 0.79 1.19 1.58 1.98 2.38 2.77 5 1.58 2.38 3.17 3.96 4.76 5.55 4 1.98 2.97 3.96 4.96 5.95 6.94 3 2.64 3.96 5.29 6.61 7.93 9.26 2 3.96 5.95 7.93 9.92 11.9 13.8 1 7.93 11.9 15.8 19.8 23.8 27.
Calculating Record Duration Likewise, you can calculate how long a given HD size will record for, using the same set of expressions. The following equation calculates the total number of Hours the system will record. ((S x C) / R) / 1.26 = H H= Hours of recording duration R= Rate of image capture, (images per second) C= Compression ratio (ex: 15 for 15:1) S= Size of Hard Drive, in Gigabytes Example: A Customer wants to use DVMS 400 to record 4 cameras, with each camera updated every second.
Remote Connectivity Options DVMS has a PCMCIA card slot (Herein referred as PC Card slot) which allows us to utilized compatible PC peripherals commonly used in Laptop PCs. This allows us to provide low cost, high performance connectivity. Gyyr currently supports specific Modems and LAN cards, as listed in the DVMS Connectivity Options table. You can order the LAN or modem card from Gyyr or through their sales channels. The Gyyr model numbers are listed in the above table.
Software Overview The DVMS Remote Access Software (RAS) allows you to access the unit from any Windows compatible PC. You can view live video, Play recorded video files, retrieve pre-recorded clips, change setting and upload new software into the recorder. In essence, you can do nearly everything remotely as you would if you were in front of the unit. Playing back the Wavelet based digital video puts high demands on the PC system, so make sure your PC meets the minimum requirements.
the amount of compression that is applied to the live video image before it is transmitted to the RAS PC. At the highest quality setting, the images will be less compressed, making bigger files that take longer to transmit. At the highest speed settings the images will be more compressed, with a faster refresh rate. Note that the slider bar is only active when the recorder is not recording. During recording, the image quality and update rate is fixed to whatever the user selected in the menus.
Significance of SEARCH mode over RAS The Search function of DVMS is extremely powerful, allowing the user to easily identify and retrieve events based on specific criteria. Very few, if any systems have this capability. This becomes particularly significant when the remote connection is limited in transfer speed, like when using a modem. You might want to retrieve a 10MB clip over a modem, but you probably don’t want to wait an hour to do so.
a) b) c) d) Camera Switcher pulse connection between DVMS 100 and Mux. Regardless of Multiplexer used, you must “tell” DVMS how many cameras are connected to the Mux. Disable Multiplexer Activity Detection Multiplexer must be programmed to output only 1 picture per camera, in a consistent order (Gyyr DSP Day/Night Sequence cannot be programmed to record more than 1 image/camera, and must sequence in logical order) First off, Image transmission performance is dictated by the recording parameters of DVMS.
Newer networks using 100baseT should see very little impact using DVMS. DVMS currently supports only 10baseT cards, and when used on a 100baseT network, would use very little bandwidth under any conditions. Text Insertion Capabilities DVMS has a single Text Inserter port per camera input. That means DVMS 100 has a single text port, and the DVMS 400 has four. This allows connection to compatible ATMs, Electronic Cash Registers (ECRs) and other devices for text overlay on the recorded video.
DVMS Connected to ATM via 5232MP Text Inserter Monitor 5232MP Text Inserter Power Monitor Out ATM Video RS-232 ATM Video Out Alarm Out DVMS Search Capabilities DVMS has extremely powerful search capabilities. Depending on the system, you might have hundreds or thousands of video clips stored on DVMS. The tools provided by DVMS allows users to quickly and easily find just the events or time frames desired, without having to slog through pages of clips.
Additionally, you can erase the time lapse partition without disturbing the Event partition. Note that you cannot selectively erase part of a partition, you must erase the entire contents of that partition. Playback Criteria In the Event partition, recorded events are “marked” or categorized by the type of event. That means that Text triggered events are marked differently than the Video Motion Events. Upon selecting the playback menu, you can specify a list of clips, by type to be displayed.
Key Competitive Features Feature Benefit Real Time Operating System (RTOS) QNX is a compact, efficient OS that offers Deterministic Behavior. This means that the Application running is in control, not the OS. Consequently, there is less chance of missed tasks, such as dropped frames or reduced performance. Dual Data Storage The OS plus the Application software occupies only a few MB’s, so both can be stored on non-volatile Flash Memory.
Flexible Motion Detection Powerful program options allows for individual selection of sensitivity, trigger size, capture rate, resolution and directional detection. Audio Recording Uncommon feature allows high quality audio recording AND remote monitoring via PC. Image Authentication Proprietary Wavelet image format allows for verifying integrity of the original file, as well as the original recording unit.
Technical Appendix Hard Drive Size Inconsistencies and DVMS Storage Formula Calculation If you query your PC’s operating system for the hard drive size, you may be surprised to find it doesn’t match the Manufacturer’s rating. For example, your PC’s hard drive was advertised to be 10.24GB of capacity. Windows reports that only 9.85GB are usable. The problem arises from the fact that HD manufacturers use the decimal measurement system whereas the Operating System will use binary.
