Introduction to acvi Long distance cable transmission of SD and HD video June 2017
The problem 1 There is a need to transmit video across long distances (100-1500m) of cable for applications in: Pipeline inspection. Vehicle/train cameras. CCTV/security. Subsea inspection. 3D/stereo robot operators. Industrial inspection. Information displays.
The problem acvi 2 The cable is usually either low cost coaxial (e.g. RG-59) or UTP (twisted pair e.g. CAT- 5) and may be part of a large umbilical cable. This type of cable attenuates high frequencies at 50MHz the RG-59 cable attenuates 6.2dB/100m, so at 300m the signal amplitude is just 12% of what it should be. Even for 10MHz frequencies the attenuation is 35%. For UTP cable the attenuation is worse.
NTSC and PAL solutions acvi Analogue NTSC and PAL video can be transmitted >1000m because the synchronizing signals are low frequency (15kHz). High frequency video loss can be compensated for using an analogue boost network at the receiver. Various manufacturers make ICs to provide NTSC/PAL cable equalization.
HD-SDI acvi For HD video transmission there was no equivalent of the NTSC/PAL composite signal. HD cameras used HD- SDI a non-compressed video interface intended for broadcast applications. HD-SDI only supports coaxial cable and because of its high frequency (1.5GHz) it can only reliably transmit ~80m of low cost RG-59 type cable. There is an abrupt loss of video at a certain distance with digital transmission methods.
acvi Over 6 years ago SingMai proposed an HD version of the NTSC/PAL composite video format - acvi. The acvi analogue signal combines colour, brightness and synchronisation components into one signal. The low frequency of sync and luma ensures reliable reception over long distances. Graceful degradation of signal over extreme distances no digital cutoff.
The competition acvi Dahua (China) produced their own version of acvi, calling it HD- CVI. HikVision (China) introduced HD- TVI using ICs from the US company TechPoint, who in turn bought the IP from SingMai. Nextchip (Korea) also introduced AHD, yet another version of acvi. None of these formats are compatible with each other! None of these competitor formats conform to the HD-SDI SMPTE broadcast specification.
acvi is specified! Why acvi? We are the only company to specify resolution, pulse response and signal to noise ratio. acvi conforms to the SMPTE broadcast luma bandwidth specification. SingMai is not a camera or DVR manufacturer. Both finished modules, OEM boards and IP cores are available for transmitter and receiver. acvi is specified! This is a 30MHz luma frequency sweep after transmission through 300m of RG-59 cable. SingMai invented the analogue HD video format and are expert in its implementation. acvi is being continuously developed.
acvi Features acvi Compatible with both coaxial and twisted-pair cable (single pair required for each channel). Near broadcast quality transmission (30MHz luma bandwidth). Automatic cable length equalization. Bi-directional data transfer over the same cable (coaxial cable only). 3D/stereo versions available. Distances of >500m of RG-59 cable (>300m fully specified). Compatible with NTSC/PAL/960H video. Can be made compatible with HD-CVI, HD-TVI and AHD. acvi test equipment available.
acvi IP acvi cores acvi IP cores. PT55/PT51 encoder/decoder: BT1120 style video interface. Compatible with all HD-SDI video formats. Supports acvi, NTSC, PAL, and 960H video formats (can also be programmed for HD-CVI, HD-TVI and AHD). Automatic cable length equalization supported. Bi-directional data transfer supported. Small footprint. Field proven in both FPGA and ASIC form.
acvi Modules acvi acvi modules. SM06 HD-SDI to acvi transmitter. SM08 acvi to HD-SDI receiver. SM10 acvi to HDMI receiver. To transmit HD video, just plug the HD-SDI video source into the SM06 acvi transmitter module and the acvi output into your cable. Plug the cable into the SM08 acvi receiver and its output into your monitor or DVR. No adjustment or calibration is necessary as acvi automatically detects the input video standard and compensates for the cable length. SM16 dual channel HD-SDI to acvi transmitter (3D/stereo applications). SM18 dual channel acvi to HD-SDI receiver. SM21 analogue NTSC/PAL to acvi transmitter. SM08-SD acvi to SDI receiver.
acvi Camera Module acvi acvi camera module. Interfaces to image sensor module (BT1120 input). Standard 42 x 42mm. footprint. Supports automatic cable equalization and bi-directional data transfer. Requires single 12VDc input. Supports remote control of sensor module. Low cost.
acvi Test Equipment acvi acvi test equpment. SingMai supports acvi with test equipment for both product and installation testing and evaluation. SM09A is an acvi video test pattern generator. Generates NTSC-M, PAL, PAL-M, PAL-N, acvi - [720p- 25/30/50/59.94/60Hz, 1080p-24/25/29.97/30Hz, 1080i- 50/59.94/60Hz]. Patterns available include: 75%/100%/SMPTE Colour bars; 50% grey, 100% white, red, green, blue flat fields; 2T/30T and Pulse bar, Modulated ramp, 5 step linearity, 30MHz Multiburst, 30/15MHz luma/chroma sweep, Crosshatch, Bounce, Circular zone plate, CCIR- 17/18/330/331, N7CMPF, N7CMBF. Programmable amplitude white noise and hum may be added to the video output. Monitoring of the acvi data interface. Battery operation.
SingMai Company Overview Daniel Ogilvie is the Technical Director of SingMai. Daniel has worked for both large and small companies in such diverse fields as university physics research support, high-end broadcast video, DVD recorder front end semiconductors, video decoder IC design and high volume consumer electronics, in countries as varied as Canada, USA, UK, Thailand and Singapore. Products that Daniel has been involved in include forensic glass refractive index measurement equipment (occasionally featured on the US TV program, CSI); very low-light photon counting video processors; broadcast quality video decoders and encoders, very high resolution real-time video processors and IC design of video input processors. Daniel is a senior member of the IEEE, has a Masters degree in Art History and is the author of three novels. Dan has a world-class understanding of the analogue video standards Mark Kwong, Director of Engineering, LSI Design and manufacture of products for the video, imaging and broadcast markets Established in September 2007. Registered office and R&D in Saraburi, Thailand. Sub-contract manufacturing by Glendale, Singapore. SingMai customers include: Lockheed/NASA (USA), L3 (Canada/USA), Fuzhou Rockchip (China), Rhode and Schwarz (Germany), Teamcast (France), Techsource Inc. (USA), Scientronic (Taiwan), Newport Media (USA), ATX Networks (Israel/Canada/USA), HikVision (China), Vision on Chip (South Korea), Aerovironment (USA), Innosilicon (China), Techpoint (USA), Eyenix (S. Korea), Aegis Electronic Group Inc. (USA)...
acvi Thank You For more information on acvi: http://www.singmai.com/video_transmission.htm