ABonAir

ABonAir Compared with other Technologies


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Comparison Table

Technology: No-Compression (Zero Delay): 3G/LTE/Cellular Network: WiFi Based Solutions COFDM Based OFDM Full Duplex
Compe/tors: Boxx TV , IDX, TransVideo Live-U, TVU Networks TeraDek, Bon-Electronics IMT/Nucomm, BMS,
Cobham, VisLink/ GigaWave
ABonAir
Distance/Range 50m Ė 100m (300m claimed in latest product) Cellular network coverage <300M 5Km for high-end, and
300m for lower-end
Flexible in all models
500m Ė 2.5km
Delay 0-2 msec. 1-3 sec. Ī1 sec. 40-60 msec. As low as 7 msec *
Video Quality Basic Quality Depending on Network Low Quality (PSNR) High PSNR High PSNR
Main Limitation Distance, stability, reliability Cellular coverage, large
audience interferences Not
for OB-vans
Quality,
Reliability
Cost,
functionality
(CCU/Intercom)
Delay for mid-range solution
Key Advantages Short range application
Ė Camera Assist, in Studio
only
Designed for single cameraman in field (ENG) Price Reliable / Robust Full-Duplex, Price, Flexible usage, Selection
of models and prices
Price Range $4K Ė $15K $20K Ė $40K
Mainly Rental
$2K -$4K $20K Ė $80K $6K -$28K

*7mSec delay is made possible in the newer models AB5xx series while it is 90mSec on the older models AB4xx & AB3xx

Seven Things You Didnít Know About Wireless Broadcast Transmission

1. Wireless broadcast transmission stability is easy (if you have the right technology)!
The challenge of stability with wireless broadcast links is apparent in unidirectional wireless systems that do not have acceptance feedback. Unidirectional systems have no acknowledgement confirmation or error notification from the receiver, which compromises stability.
In ABonAirís unique bidirectional links, both transmitter and receiver can send and receive data and control information.
The technology enables the receiver to acknowledge each pixel transmitted over the air, guaranteeing zero transmission errors. The packet acknowledgment mechanism identifies errors and quickly fixes them (by re-transmitting the corrupted data) before the frame is presented. This enables ABonAirís bidirectional solution to ensure that all data is well received without errors, increasing stability and robustness

2. Transmission range can be extended through a wise antenna setup
Range variance is impacted by the number and locations of antennas, and by the use of power amplifiers. ABonAirís wide variety of antennas and power amplifiers support any set-up, extending both range and coverage. ABonAir systems reach up to 2.5 km (1.5 miles) without power amplifiers in clear line-of-sight, and go beyond 2.5 km when boosted by power amplifiers.

3.Line of Sight impacts transmission coverage
The declared range of systems is measured in clear lineof- sight with no obstacles between the camera, and the receiver at the OB-van or media center. The reason for clear line-of-sight measurements is that testing and results can be duplicated anywhere. However, the actual range is determined by the number of obstacles between the transmitter and the receiver, and their material composition.
All radio systems obey basic physical rules: radio waves are blocked by metals, water, concrete, trees, walls, trucks and more. In the same way that shifting position by just one meter may allow for better cellular phone reception, microwave camera link transmission range is affected by signal blocking. Appropriate antenna installation can solve signal blocking and easily increase coverage and range dramatically.

4.Compression does not reduce video quality
Compression does not reduce video quality. Compression refers to the removal of redundant information from the video.
The same image can be compressed from lightly (very high quality video) to heavily (low video quality). Without compression an HD video bandwidth requirement
uses an overwhelming ~2Gbps. Transmitting 2Gps is an impossible task for wireless systems with a range of few hundred meters. Compression is vital to keep picture quality high. Success hinges on compressing as little as possible based on what the wireless link can maintain. Uncompressed systems simply cut or remove quantities of information and only transmit 400-500 Mbps, explaining low picture quality.
Bidirectional technology enables significantly increased bandwidth efficiency. ABonAirís bidirectional system constantly receives feedback and acknowledgement,identifying conditions of wireless capacity that allow it to adjust to the minimum possible compression. The system utilizes the minimal compression required for quality broadcasting while taking into consideration the existing wireless conditions. In this way, ABonAirís bidirectional system compresses less while maintaining high picture quality (45dB PSNR).

5.The catch in short range transmitters
Short range systems, based on non-compressed technology, are designed for a single room application and are mainly used in production monitoring. They are price competitive,
but do not produce recording and broadcast quality. Unable to maintain high picture quality, they delete a lot of picture data and their range is limited. ABonAir systems provide high recording quality for broadcast professionals, and are priced accordingly.

6.There is a trade off between delay and compression
Wireless video delay derives from the systemís encoding and decoding functions. A good encoder requires time to transmit the picture and then compresses it. Delay is
not generated from the wireless transmission. The delay in wireless transmission itself is less than 1msec. A compression CODEC is an essential requirement in professional broadcasts as it reduces content size to match the limited wireless capacity. Some wireless transmitters transfer uncompressed video directly to reduce costs, but this involves removing information from the picture in order to save bitrate required from the radio. Uncompressed solutions are based on a very high throughput wireless link.
This topology stretches wireless technology to its maximum and reduces distance and coverage to a minimum guarantees errors during the broadcast session, and compromises on picture quality. Uncompressed transmission is only suitable for a very short range (of several meters) with reduced picture quality.
ABonAirís systems allow for a low 90msec delay, answering a crucial need in live event coverage. ABonAir R&D teams constantly work to improve the H.264 Encoder and reduce its delay, which naturally cuts back on delay of the overall system.

7.The superiority of automatic set up
Automatic frequency selection is a key benefit in the ABonAir system. It dramatically improves transmission robustness, freeing the cameraman to shoot video rather than deal with wireless configurations. The system can automatically select the quietest, most reliable channel available. Operational interferences is handled by jumping to an alternative clear available frequency, by contrast to other systems that cannot change frequency during operation. ABonAirís advanced system functions on algorithms that automatically identify on-site frequency problems and perform the necessary calculations for switching to another frequency, transmitter and receiver within the same millisecond.


Three Things You Didnít Know About ABonAir