In this article, A&S examines products from Chinese four-channel standalone DVR vendors,such as Hanbang, Jinsong, DIT, Aopvision, Witson, New Surway, Jurway, Great CCTV,Raysharp, Dahua and Sunell.
In this article, A&S examines products from Chinese four-channel standalone DVR vendors,such as Hanbang, Jinsong, DIT, Aopvision, Witson, New Surway, Jurway, Great CCTV,Raysharp, Dahua and Sunell.
With H.264 video compression, real-time OS and one SATA hard-disk drive (HDD) interface, Hanbang's HB-7004 four-channel standalone DVR features USB2.0 and remote backup. CIF recording resolution is 352 pixels by 288 pixels (PAL) and 352 pixels by 240 pixels (NTSC). It offers six levels of image quality and RJ45 10/100M Ethernet interface. With four alarm inputs and one alarm output, it delivers RS232 or RS485 for PTZ and PS/2 for mouse. Power supply is 220 volts ∮ 30 percent, 50 Hz ∮ 3 percent or 110 volts ∮ 20 percent, 60 Hz ∮ 3 percent. Power consumption is 10 watts (without hard disk). It works in temperatures from -10 to +55 degrees Celsius, and humidity levels from 10 percent to 90 percent. Other functions include watchdog, dual stream, PPPoE, DHCP and DDNS.
Jinsong ' s SE-DVR2104 i s a four-channel standalone MJPEG DVR with motion detection and password protection. It has PAL and NTSC video signal systems. Horizontal resolution (play) is 720 pixels by 576 pixels (PAL) and 720 pixels by 480 pixels (NTSC); horizontal resolution (playback) is 640 pixels by 272 pixels (PAL) and 640 pixels by 224 pixels (NTSC). It comes with a buzzer, image loss alarm and key lock. Video input is four BNCs and one BNC and one VGA output. The product provides three recording modes, including continuous, alarm and none. Detected image display rate (four) is 25 frames per second (PAL) and 30 frames per second (NTSC). It has 12-volt DC and four-ampere input power.
DIT's D3004MT (four-channel) standalone DVR with MPEG-4 compression, optional VGA and video loss alarm support Linux operating systems. With full-D1 live monitoring, the product provides hiding and switching of channels. It also features IE-based network monitoring combined with audio I/O and USB2.0 interfaces. Recording modes include continuous, motion detection, sensortriggered and time schedule. It supports IDE and SATA HDDs (optional). With settable windows and sensitivity motion detection, the product provides system self-recovery after power is reconnected. It comes with variable recording frame rate and quality levels.
With MPEG-4 compression, Aopvision's AOP-1004LX MPEG-4 four-channel standalone DVR supports half D1 (704 pixels by 240 pixels or 704 pixels by 288 
pixels), CIF (352 pixels by 288 pixels in PAL or 320 pixels by 240 pixels in NTSC). Display resolution is 704 pixels by 576 pixels (PAL), and 640 pixels by 480 pixels (NTSC). Display and recording rates are 120 frames per second (NTSC), 100 frames per second (PAL). It offers TCP/IP, LAN, client software and IEUSB2.0. With BNC, VGA and IR controller, it provides pan tilt zoom and remote control.
Witson's W3 -D2104BII is a four-channel standalone DVR with manual and motion detection recording modes, USB backup, and IR remote controller. It features MJPEG compression and simplex operation. Video search is by event, date and time. The product has one removable IDE HDD rack backup. In addition, video input is via four BNCs, output by one BNC. It features 720 pixels by 480 pixels (NTSC) and 704 pixels by 576 pixels (PAL) video display resolution; CIF playback is 360 pixels by 240 pixels (NTSC) and 352 pixels by 
288 pixels (PAL). Display frame rate is 120 frames per second (NTSC) and 100 frames per second (PAL); in recording, it is 30 frames per second (NTSC) and 25 frames per second (PAL).
New Surway's SDVR-6904C H.264 standalone DVR has four channels of audio and D1 display. It offers 120 frames per second and 30 frames per second of recording (CIF); it also supports MJPEG compression, motion detection, USB backup and remote controller.
Jurwa y's SDVR- 4400 Eis a four-channel standalone embedded DVR with recording and dynamic alarm detection, which uses passwords to keep resources confidential. It features MJPEG compression as standard and LAN. With clear images from either NTSC or PAL systems, it offers four-menu automatic switch. The product sets brightness, contrast and color for each channel. It supports IE remote, and RS232 and RS485 can be connected to other installations. Manual, set time and alarm recording formats enable it to select real-time and non-real-time recording.
It provides real-time four-menu replay and non-single menu magnification coalition formats. It also has record, replay and quit functions. Speed is default (X3) or selectable replay. Paroxysmal power cuts will not affect recorded images. The DVR a l so suppor t s f o u r c h a n n e l s o f a l a rm i n p u t a n d o n e c h a n n e l o f alarm output, and a removable hard disk. Both Chinese and English can be used to program the device. Power supply is 90 volts to 240 volts AC, 50 Hz to 60 Hz.
Aopvision's AOP-1004 four-channel MPEG-4 triplex real-time standalone DVR with various recording modes supports watermarking and comes with one RS-485 terminal block. Display resolution in NTSC is 720 pixels by 480 pixels; in PAL, it is 720 pixels by 576 pixels. With 1.0Vp-p composite, 75 ohm balanced monitor output and 100 frame per second (PAL) or 120 frame per second (NTSC) recording and playback, it features low, normal, fine, high and highest recording quality. Recording schedules are available for five minutes, 30 minutes or 60 minutes. The product has one RJ45 connector, 10/100 megabits per second Ethernet, 12-volt DC, five-ampere power and an embedded Linux operating system.
Great CCTV's SDVR-8504 is a TFT standalone DVR with a seven-inch hidden TFT monitor, four channels of video and audio, and MJPEG compression. It has 
real-time and high-speed embedded CPUs. Pressing a switch automatically pops up or closes the TFT. By using IDE with a less than 200-gigabyte HDD, it provides security with a double password lock. Resolution is 704 pixels by 240 pixels or 352 pixels by 240 pixels in NTSC, and 704 pixels by 288 pixels or 352 pixels by 288 pixels in PAL. Recording rates are 120 frames per second in real timefor four channels (NTSC) or 100 frames per second (PAL). Recording mode includes manual, timing, alarm and motion detection. The product features high, medium and low adjustable image settings with full-duplex display mode. It also supports Pelco-D, Pelco-P, B01 and Samsung pan tilt zoom (PTZ) control as well as IE, PPPoE and DDNS networks. Raysharp's D2004 four-channel compact standalone network DVR features MJPEG (12-kilobyte to 20-kilobyte per frame) compression. It has four-channel BNC inputs and one-channel output video I/O with ATA-100 and removable HDD trays and HDD interfaces.
The product allows installation of 250-gigabyte HDDs, and it offers low, normal and high recorded picture quality. It also provides a mini design for homes, small retail stores and offices. With PC playback and backup via the built-in USB 2.0 port, it delivers area selection and sensitivity adjustment for each camera. It comes with password protection, IR remote control and system self-recovery after power is reconnected.
Dahua's LN series features four-channel standalone DVRs with smart video detection that is compatible with USB devices. H.264 compression is ideal for standalone DVRs and real-time live displays for up to four cameras, 100-frame per second or 120-frame per second recording (CIF). Pentaplex functions are live, recording, playback, backup and remote access. It supports one HDD, four-channel audio inputs and cross talk. It also features motion detection, camera blank, video loss smart video detection, and alarm triggering screen tips, buzzer, PTZ preset, e-mail and FTP upload. There are many easy multiple control and backup methods. It provides privacy masking, camera lock, color setting and title display smart camera settings. It supports more than 60 protocols for pan tilt zoom and speed dome control as well as for preset, scan, auto pan, auto tour, pattern and auxiliary functions.
Sunell's SN-QDR 1204 i s a four-channel standalone digital video recorder wi th MJPEG hardware compression. It has a three-dimensional (3D) mouse control for standard SP/2 with USB 2.0 interface, and it can be connected for recording data backup and system upgrade. Display format is full-screen, 2x2 with speed of 100 frames per second (PAL) and 120 frames per second (NTSC). Record image quality is selectable to five levels. Recording modes are continuous, schedule, alarm record selectable while operating modes are 3D mouse, keyboard and remote control. Storage can be connected up to two HDDs. It also offers RS485 communication interface