Connector switch apparatus which can provide either a satellite

Details Connector switch apparatus which can provide either a satellite Connector switch apparatus which can provide either a satellite

1996-10-02

1999-05-25

Lee, Michael

Television

Image signal processing circuitry specific to television

Switching

348614, 348731, 4551931, 455284, 342359, H04N 521

Patent

active

059073713

ABSTRACT:
Connector switch apparatus which can provide either a cable or satellite television signal or a ghost-free off-air television signal. The apparatus obtains the cable or satellite television signal from a cable or satellite tuner, which can be included in the apparatus; and includes a television tuning device for producing a ghost-free off-air television signal, and a switch which provides either of those signals. The television tuning device employs use of antenna directionality control and ghost cancellation to produce a ghost-free off-air television signal. In particular, the television tuning device obtains an off-air television signal from a antenna, which may or may not be included therein, whose directionality can be changed to change reception quality of a received off-air television signal; and includes a baseband ghost cancellation unit which can perform baseband ghost cancellation. In a first embodiment, the directionality of the antenna is changed so that an off-air television signal of sufficient reception quality is received from which a ghost-free off-air television signal can be produced therefrom by the ghost cancellation unit. In a second embodiment, the television tuning system further includes a tuner, and controls the directionality of the antenna and the tuning frequency of the tuner so that a tuned off-air television signal is produced which is properly tuned and of sufficient quality that a properly tuned ghost-free off-air television signal can be produced therefrom by the ghost cancellation unit.

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W. Cicora et al, "A Tutorial on Ghost Cancelling in Television systems", vol. CE-25, No. 1, pp. 9-44 (Feb. 1979).
J. Huang, "A Ghost Cancellation system for the NTSC Television", IEEE Trans. on Consumer Electronics, vol. 39, No. 4, (Nov. 1993) pp. 896-904.
S. McNay, "Ghost Cancellation Implementation in Television and VCR", presented Jun. 7, 1995 at the International Conference on Consumer Electronics in Chicago, IL, Jun. 5-7, 1995 (published in the ICCE Digest of Technical Papers, IEEE Cat. #95CH35719, ISBN 0-7803-2140-5, 2141-3, 2142-1, Library of Congress 84-643147).

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