Pulse or digital communications – Multilevel
Reexamination Certificate
2007-08-01
2008-12-30
Ahn, Sam K (Department: 2611)
Pulse or digital communications
Multilevel
Reexamination Certificate
active
07471733
ABSTRACT:
Methods and apparatus are provided for the provision of high definition television services over an analog or digital broadcast infrastructure. In one aspect, the present invention provides a method for transmitting a plurality of digital data streams over an analog microwave link comprising multiplexing the digital data streams, converting the multiplexed data stream into an analog baseband signal and transmitting the baseband signal along with an analog sub-carrier over an analog broadcast network. In another aspect, an apparatus for performing the method is provided. In a further aspect, a method and apparatus for preparing digital data for transmission over a microwave link comprises the step of, or structure for, multiplexing a plurality of digital data streams, encoding the multiplexed digital data stream to form a multi-level signal and combining the multilevel signal with one or more sub-carrier signals to form a radio frequency signal.
REFERENCES:
patent: 4535352 (1985-08-01), Haskell
patent: 5541955 (1996-07-01), Jacobsmeyer
patent: 5581575 (1996-12-01), Zehavi
patent: 5602595 (1997-02-01), Citta et al.
patent: 5841806 (1998-11-01), Gilhousen
patent: 5903775 (1999-05-01), Murray
patent: 6002722 (1999-12-01), Wu
patent: 6026097 (2000-02-01), Voois
patent: 6055268 (2000-04-01), Timm
patent: 6163681 (2000-12-01), Wright
patent: 6377314 (2002-04-01), Collins et al.
patent: 6404776 (2002-06-01), Voois
patent: 6421336 (2002-07-01), Proctor
patent: 6496504 (2002-12-01), Malik
patent: 6661975 (2003-12-01), Hall
patent: 6724441 (2004-04-01), Choi et al.
patent: 6738102 (2004-05-01), Park et al.
patent: 2003/0048856 (2003-03-01), Ketchum et al.
patent: 2004/0101046 (2004-05-01), Yang et al.
Advanced Television Systems Committee, Annex D, RF/Transmission Systems Characteristics, Industry Standard, Sep. 16, 1995.
Advanced Television Systems Committee, ATSC VSB Transmission: The Right Choice for U.S. DTV Broadcasters, Online Journal, Jul. 2, 1999.
Axcera, LLC, Distributed Transmission Technology, on-line web article, Mar. 12, 2003.
Lucent Technologies, Lucent Digital Video ammounces DVB-ASI support for MPEG-2 encoder; ideal for global cable systems, press release, Dec. 2, 1998, www.lucent.com/press/1298/981202.cob.html.
Nucomm, “Nucomm Earns TV Technology's Star 2001 Award for Revolutionary New Analog Coder at NAB: Proprietary New Technology Allows Transmission of DTV Signal Plus a T1 Data Pack Over Existing Analog Radios”, May 2001.
Nucomm, “Nucomm Introduces the Analog Coder: Revolutionary New Technology Allows Transmission of DTV Signal Plus a T1 Data Pack Over Existing Analog Radios”, Apr. 2001.
Nucomm, ‘Analog Coder: Digital over an Analog Link Modulator/Demodulator Converts existing Analog STL to a Digital STL’, Nucomm product guide, Apr. 2001.
Nucomm, Nucomm Announces Major Upgrade of the Analog Coder Nucomm Microwave Solutions For The Digital Age, Feb. 26, 2003.
S. Sastry, MIT Media Lab, Pulse Modulation Schemes, web page, Apr. 20, 1997, www.media.mit.edu/physics/pedagogy/fab/fab—2002/help—pages.
Sparano, David “What Exactly Is 8-VSB Anyway?” Third edition of an article that orignally appeared in 1997. Previous editions have appeared on the Harris Broadcast website and the Miller Freeman Guide to Digital Television, 1997.
Yener, Summary Of Amplitude Modulation, on-line web course, date-unknown, website unknown.
Zenith Electronics, ATSC Re-Modulator 221-1413, Preliminary, Apr. 1999.
Zenith Electronics, ATSC VSB Re-Modulator System, Specification, Jan. 4, 1999.
Zenith Electronics, Inc., Re-Modulator ASIC Evaluation PCB, Specifications, Mar. 20, 2000.
Payne, III John B.
Payne, IV John B.
Ahn Sam K
Lerner David Littenberg Krumholz & Mentlik LLP
Nucomm, Inc.
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