Grass Valley HD Wireless - Manual (Page 15)

HD Wireless User’s Guide (v6.2) 15
Chapter 1 - Introduction
Chapter 1
Introduction
1.1 Technology
1.1.1 System configuration
The HD wireless system docks to the Grass Valley cameras LDK 8000 (Elite), LDK 4000 (Elite)
and LDK 6000 to form an HD Digital Wireless Camera System. It supports 1080i50/59.94,
720p50/59.94 and 1080psF25/29.97 acquisition while using an innovative approach both to
compression and transmission.
For compression, the HD wireless system uses state-of-the-art JPEG 2000 compression
technology with a 10-bit, end-to-end signal. You can use intra-field or spatial/temporal
compression. What's more, there is no MPEG-style ‘Group of Pictures (GoP)’. Consequently
every frame is of the same high quality for postprocessing and editing.
For transmission, this bi-directional system provides genlock and full control of the camera in
the same way as with a triax cable system. Coupled with a high bit-rate protocol (based on the
802.16 physical layer), it features low latency, enabling you to integrate wireless shots into your
production with imperceptible video-to-audio delay. To fulfill specific requirements in different
environments a set of profiles allow you to balance between the robustness of the wireless
transmission and its bit-rate. The high-performance digital transmission means that the system
is omnidirectional with no adverse effects from multi-path reflections.
1.1.2 Shooting range
The HD wireless system features a three-antenna diversity set. This receiving unit, when
suitably placed, together with a video output power of 60 mW, offers you a shooting range of
up to 150 m (500 ft). This shooting area can be extended to up to 400 m (1,300 ft) using the
optionally available LDK 5455/50 or LDK 5455/60 Video Booster. The built-in data booster
provides coverage of up to 1,000 m (3,280 ft) for the data link.
Adding a second antenna set can readily extend the coverage area, letting you move, for
example, from a stadium to a dressing room. The system switches automatically and seamless
between the two antenna sets.
The connection between a base station and the wireless system's antenna set uses
conventional Triax cable, enabling you to locate an antenna up to 600 m (1,970 ft) from the
base station using 11 mm (7/16”)
Triax cable. The HD wireless camera system is fully
compatible with studio production facilities, the Grass Valley C2IP camera control system, and