Analog Devices Inc. (ADI), which manufactures semi-conductors, demonstrated the first real-time compression and wireless transmission of HD video (for a consumer application) at the DisplaySearch HDTV Conference in Beverly Hills, Calif. The combination of Ultra Wideband (UWB) technology from Pulse-Link and Analog Devices' ADV202--a real-time HD implementation of the JPEG2000 standard--was said to reduce the visual impact of errors that occur in wireless transmission channels.
In addition to the ADV202 compression engine for handling the HD signal, ADI said the solution includes Pulse-Link's Continuous Wave (CWave) UWB architecture, which forms the foundation of a 1GB UWB radio. Unlike other UWB technology, CWave derives its signal from a narrowband frequency that's modulated to create a UWB signal spectrum.
The companies' technologies are geared to produce a low-latency, high-response interactive video gaming experience wirelessly, as the first lossless wireless alternative to DVI and HDMI (HD multimedia interface).
JPEG2000, established as an international standard in 2001, is an image compression standard based on wavelet transforms. The wavelet transform is a technology that applies two-dimensional filtering and sub-sampling (pixel decimation) in hierarchical and multi-step combinations.
The standard compresses each frame independently (thus transmission errors affect only a single frame), and do not propagate through subsequent images. Because there is no inter-frame processing, ADI reported that, end-to-end latency is very low.
