Camera zoom compensator for television stereo audio

Details Camera zoom compensator for television stereo audio Camera zoom compensator for television stereo audio

1984-10-15

1986-06-10

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358143, H04N 704

Patent

active

045946108

ABSTRACT:
A stereophonic television signal processing arrangement includes a television camera having a zoom lens capable of wide and narrow viewing angles. A sensor coupled to the zoom lens generates a control signal indicative of the current field of view. An audio signal generator such as a pair of microphones and a matrix generates L+R and L-R audio signals. In order to ameliorate a perception problem associated with expectations as to the direction (left or right) from which the audio signal comes when viewing a receiver showing a narrow-field-of-view picture, a multiplier arrangement multiplies the L+R and L-R signals by factors K.sub.1 and K.sub.2, respectively, which are directly and inversely related, respectively, to the control signal indicative of current field of view.

REFERENCES:
patent: 3056854 (1962-10-01), Katzenstein et al.
patent: 3837736 (1974-09-01), Ogiso et al.
patent: 4032717 (1977-06-01), Mallon
NHK Laboratory Report #104, dated Nov. 1966.

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