Television – Format – Including additional information
Patent
1993-07-09
1994-12-06
Groody, James J.
Television
Format
Including additional information
348473, H04N 7087, H04N 708
Patent
active
053715489
ABSTRACT:
A system is disclosed which provides a significantly enhanced transmission rate for digital data transmitted over a channel, while also providing immunity to signal interference caused by multipath reception. One embodiment of the system transmits a signal containing digital data in the vertical blanking interval of a television signal. Before being transmitted, the digital data is modulated by a process called orthogonal frequency division multiplexing, or OFDM. A guard interval is optionally prefixed to the front end of the data signal to provide additional immunity to multipath interference. A further feature of the present system is the optional inclusion in the transmitted signal of an error correcting code which allows detection and correction of multiple sequential data transmission errors.
REFERENCES:
patent: 3511936 (1970-05-01), Saltzberg
patent: 4882614 (1989-11-01), Kageyama et al.
patent: 4884139 (1989-11-01), Pommier
patent: 5153723 (1992-10-01), Citta
patent: 5291289 (1994-03-01), Hulyalkar et al.
Gledhill, et al., "The Transmission of Digital Television in the UHF Bank Using Orthogonal Frequency Division Multiplexing", Nat'l Transcommunications Ltd. UK, pp. 175-180.
Lassalle, R & Alard, M., "Principles of Modulation and Channel Coding for Digital Broadcasting for Mobile Receivers":, EBU Review-Technical, No. 224-Aug. 1987, pp. 168-190.
Cable Television Laboratories, Inc.
Grant Chris
Groody James J.
LandOfFree
System for transmission of digital data using orthogonal frequen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System for transmission of digital data using orthogonal frequen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for transmission of digital data using orthogonal frequen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-217807