Muting circuit for a television receiving set

Details Muting circuit for a television receiving set Muting circuit for a television receiving set

1993-06-07

1995-04-18

Groody, James J.

Television

Image signal processing circuitry specific to television

Sound muting

348738, H04N 544, H04N 5445, H04N 560

Patent

active

054082730

ABSTRACT:
A muting circuit for a television receiving set comprises a mute-judging part, a mute key input, an acoustic output circuit, a caption-judging part, and a caption key input. The mute-judging partenters a mute ON and a mute OFF state alternately every time it receives a mute key input signal. The acoustic output circuit reduces the sound output level to zero decibels at the mute ON state, and restores the sound output at the mute OFF state. The caption-judging part enters a caption ON state and caption OFF state alternately every time it receives a caption key input signal while it enters a caption ON state if the mute-judging part enters a mute ON state. Thus, in the mute ON stated the closed caption is displayed on the screen.

REFERENCES:
patent: 4554584 (1985-11-01), Elam et al.
patent: 5128987 (1992-07-01), McDonough et al.
patent: 5327176 (1994-07-01), Forler et al.
"New VCRs Compatable With VHS, VHS-C Formats" Times Union (AL)-Thursday May 16, 1991, Jonathan Takiff Knight-Rider.
"Mulhport for ATV?" Consumer Electronics, Dec. 18, 1989, P. N/A.
High Tech Closed-Captioned TV Not Just For Hearing-Impared Anyone "Daily News of Los Angeles (LA)-Thursday", May 13, 1993 by Jonathan Takiff, p. L. 23, Edition VALL Section, LA FIFE.

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