Television signal multiplexing and demultiplexing system

Details Television signal multiplexing and demultiplexing system Television signal multiplexing and demultiplexing system

1990-12-06

1993-01-05

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358141, 358 16, H04N 1106

Patent

active

051775972

ABSTRACT:
A television signal multiplexing and demultiplexing system includes a signal separation circuit for separating from a composite color television signal a plurality of first television signals serving as additional information for making the quality of a television picture higher and a second television signal. A matrix operation circuit performs a vertical matrix operation on the first television signals so as to dispose each of the first television signals in a different vertical band, thereby producing operation outputs. A delay circuit delays the operation outputs by different amounts of delay to produce delayed outputs. A multiplexing circuit multiplexes the delayed outputs on different horizontal scanning lines of the second television signal to produce a multiplexed output. A demultiplexing circuit demultiplexes the multiplexed output into the operation outputs and the second television signal. A recovering circuit recovers the first television signals by performing a matrix operation which is the inverse of the matrix operation on the separated operation outputs to recover the first television signal.

REFERENCES:
patent: 4498097 (1985-02-01), Fujimoto
patent: 4605950 (1986-08-01), Goldberg et al.
patent: 4949166 (1990-08-01), Isnardi
T. Kukinuki et al., "Fully Compatible EDTV for Improving Both Y and Color Signals by Using a Single New Subcarrier", I.E.E.E. Transactions on Consumer Electronics 1988 International Conference on Consumer Electronics, Part I, vol. 34, No. 3, Aug. 1988, pp. 469-473, IEEE New York, US.
T. Ohira et al., "Orthogonal Transform Coding System for NTSC Color Television Signals", IEEE Trans. Communications, vol. COM-26, No. 10, Oct. 1978, pp. 1454-1463.

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