PROGRESS: Completed Project	PROJECT REF: PA080
PROJECT TITLE: Data Transmission System (A Preemphasis Filter System for In-Building Video Distribution Using Category 5 Twisted Pair)
PROJECT DESCRIPTION: Television and video programming are now available by cable systems. However, the difficulty is that telecommunication services are commonly provided through a network of optical fibre cables that extend as far as the basement of a building, and then for signals to be carried to individual users by a twisted-pair cable. While a twisted-pair cable is more than adequate for carrying voice transmissions and simple data transmission, such a cable introduces channel distortion that degrades picture quality. The novel preemphsis filter system relates to a method for the distribution/transmission of video signal through category 5 twisted pairs for a distance of up to at least 300 meters. The invented method utilized a new channel characterization circuit to determine the magnitude and phase responses of a channel and then uses a preemphasis filter to compensate the channel distortion at the transmitter. The invented system can be used by telecom companies to provide video-on-demand, Internet connection and other interactive multimedia services. Potential Applications: - Private video-on-demand (VOD), interactive multimedia services - Intranets for hotels, hospitals, shopping centers, recreational centers, large corporations that require high speed data/video distribution up to 300 meters Advantages over Present Technologies: 1. A preemphasis filter system has lower bit error rate than an equalizer system since an equalizer would also enhance the noise when trying to compensate a distorted signal. 2. A preemphasis filter can be time-shared and hence more cost-effective 3. Cheaper than an equalizer system 4. Better performance
FOCUS AREA(S): Digital Entertainment
KEYWORDS: video-on-demand, video, interactive multimedia service, intranet, high speed data distribution, vide
MODE OF COLLABORATION: Technology Licensing, Further R&D Collaboration
STATUS PATENT: Granted	PATENT NO: US6571393
ORGANIZATION: Hong Kong University of Science and Technology R and D Corporation Limited
CONTACT PERSON: Shirley Woo	EMAIL: cawoosw@ust.hk
TEL: (852)-23587918	FAX: (852)-23582751
WEBSITE: http://rdc.ust.hk/	DATE: 29/12/2004