Thank you for recommending "".
Your recommendation has been successfully processed.
Chip Sets Hurdle QoS Issues To Deliver Wireless Video
By improving transmission and reception quality, two companies developed chip sets that handle standard and HDTV video data streams over wireless networks.
Date Posted: November 24, 2003 12:00 AM
ANY PROCESSING FORMAT
The content the chip processes can come from any source because the chip can process video in any standard format, from MPEG1 to MPEG4 to H264, audio formats including AC3, AAC, and MP3, and many others. Furthermore, the encoding technology integrated into the XCode II can encode video-frame information with much greater quality at a lower bit rate than previous processors. This results in smaller files, improves the storage capability of devices like personal video recorders, and allows more to be stored on DVD-writable disks.
The chip's high-speed transcoding capability—4× to 8× real time—can also adjust the bit rate to account for wide variations in the processing capabilities and storage capacities of different consumer devices. Up to four concurrent analog audio/video streams can be encoded simultaneously. Each video stream can be MPEG2/MPEG4 encoded up to a bit rate of 15 Mbits and up to a 720- by 480-pixel resolution. On-chip transport demultiplexers enable the XCode II to accept up to eight digital video inputs, which it can then transcode/transrate in real time to different bit rates and resolutions on a frame-by-frame basis.
In addition to the XCode II video network processor, a typical system would include the company's IP network monitoring and management software and an an application tool suite. It also has the Matrix wireless LAN interface, which contains a dual-channel 802.11a integrated physical-layer interface and a media-access controller that provides up to 26 Mbits/s of useable bandwidth with a range of 100 feet through three walls. A full reference design and system development kit is available for designers to evaluate and test the XCode II operation.
Samples of the Magis and ViXS chip sets are available. The Magis MGS5200 chip set costs $33.55 in lots of 10,000 units, while the MGS6200 is slightly higher. The ViXS XCode processor sells for $50 in lots of 10,000 units.
Magis Networks Inc.
www.magis.com
ViXS Systems Inc.
www.vixs.com