Recovering data from a vestigial sideband of a standard televisi

Details Recovering data from a vestigial sideband of a standard televisi Recovering data from a vestigial sideband of a standard televisi

1997-09-25

2000-04-04

Peng, John K.

Television

Nonpictorial data packet in television format

348465, 348473, 348725, 348726, 348706, H04N 7081

Patent

active

060467754

ABSTRACT:
A method and apparatus for recovering an information carrier which has been transmitted as a sub-carrier in the lower VSB spectral region of a television signal. The invention utilizes a spectral inversion method to shift the data carrier frequency from the normal VSB spectral region to a spectral region normally associated with video information in a standard television signal. The data carrier is then recovered using a standard video demodulator and provided to a data utilization circuit, such as a QPSK demodulator.

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patent: 5731841 (1998-03-01), Rosenbaum et al.
patent: 5739866 (1998-04-01), Kim et al.
National Association of Broadcasters (NAB) submission of Dec. 17, 1996 entitled "D-Channel Signal Specification".
National Association of Broadcasters (NAB) submission of Apr. 30, 1994 entitled Response to RFP "NTSC-Compatible Data Broadcasting Systems".
National Association of Broadcastiers (NAB) submission of Jul. 3, 1996 entitled "Description of D-Channel Implementations".

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