Automatic stereophonic manipulation system and apparatus for image enhancement
First Claim
1. An automatic stereophonic image enhancement system comprising:
- left and right lines each having an input and an output;
a left adder in said left line and a right adder in said right line respectively between said input and said output;
input connection means connected to each of said left and right lines between its respective input and its adder said input connection means receiving any signal appearing at the left line input and receiving any signal appearing at the right line input, said input connection means producing a combined signal comprised of a combination of the signals received from the left and right line inputs;
delay means connected to said input connection means for delaying the combined signal at said input connection means to produce a delayed signal;
control means for receiving said delayed signal from said delay means, said control means having an output connected to both of said adders in said left and right lines for delivery of the delayed signal thereto, said control means controlling the amplitude of the delayed signal so as to produce a delayed and amplitude controlled compensation signal to each said adder; and
output connection means connected to both said left and right lines between said adders and said respective outputs, said output connection means sensing the signal in said left and right lines at said outputs thereof and being connected to said control means for automatically adjusting said control means to maintain the delayed and amplitude controlled signal in said adders substantially at a desired level.
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Accused Products
Abstract
The manipulation system and apparatus receives electronic signals which are to be processed and recorded for playback as enhanced stereophonic audio signals from two laterally spaced loudspeakers in front of the listener. The system and apparatus processes those signals to produce a conditioning signal, such as which would be produced by virtual room boundaries, which is heard together with the original signals so that an enlarged listening area is perceived by the listener. By amplitude and phase control of the signal to the two real speakers, the system and apparatus provide a means for control over the enhanced sound field. This enhanced sound field is perceived by the listener as being contained within boundaries larger than those normally reproduced by stereophonic speakers.
The system and apparatus generates a conditioning signal for the enhancement of natural, and generation of artificial, spatial qualities present in stereo signals usually masked in the acoustic environment in which reproduction takes place, through generation of phantom boundaries. The apparatus monitors its own output and shuts down if the output contains qualities that cannot be cut onto a record. The apparatus provides self-adjustment in the electronic system to maintain spatial masking reversal at a constant value regardless of program material.
75 Citations
40 Claims
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1. An automatic stereophonic image enhancement system comprising:
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left and right lines each having an input and an output; a left adder in said left line and a right adder in said right line respectively between said input and said output; input connection means connected to each of said left and right lines between its respective input and its adder said input connection means receiving any signal appearing at the left line input and receiving any signal appearing at the right line input, said input connection means producing a combined signal comprised of a combination of the signals received from the left and right line inputs; delay means connected to said input connection means for delaying the combined signal at said input connection means to produce a delayed signal; control means for receiving said delayed signal from said delay means, said control means having an output connected to both of said adders in said left and right lines for delivery of the delayed signal thereto, said control means controlling the amplitude of the delayed signal so as to produce a delayed and amplitude controlled compensation signal to each said adder; and output connection means connected to both said left and right lines between said adders and said respective outputs, said output connection means sensing the signal in said left and right lines at said outputs thereof and being connected to said control means for automatically adjusting said control means to maintain the delayed and amplitude controlled signal in said adders substantially at a desired level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. An automatic stereophonic enhancement system comprising:
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a left channel line having a left input and a left output, said left input being adapted to receive a left channel input signal, and said left output being adapted to deliver a left channel output signal; a right channel line having a right input and a right output, said right input being adapted to receive a right channel input signal, and said right output being adapted to deliver a right channel output signal; a left adder in said left channel line between said left input and said left output, said left adder being adapted to receive said left channel input signal; a right adder in said right channel line between said right input and said right output, said right adder being adapted to receive said right channel input signal; a delay means having delay means inputs connected to both of said left and right inputs so that said delay means may receive said left and right channel input signals, said delay means having a delay means output, said delay means creating at said delay means output a delayed signal which delayed signal is a combination of said right channel input signal and said left channel input signal and which is delayed with respect to said left and right channel input signals; a control means having a control means input connected to said delay means output for receiving said delayed signal, said control means having a control means output connected to each of said left and right adders, said control means delivering an amplitude controlled delayed signal to each of said left and right adders whereby each of said left and right adders receives the amplitude controlled delayed signal in addition to the left channel input signal and the channel input signal right received by said left and right adders, respectively; and output sensing means having sensing means inputs connected to each of said left and right channel lines between its adder and respective output and having a sensing means output connected to said control means, said output sensing means sensing the left and right channel output signals and automatically adjusting said control means to maintain said amplitude controlled delayed signal at a desired level. - View Dependent Claims (31, 32, 33)
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34. An automatic stereophonic enhancement system comprising:
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a first line having a first line input and a first line output, said first line input being adapted to receive a first input signal, and said first line output being adapted to deliver a first output signal; a second line having a second line input and a second line output, said second line input being adapted to receive a second input signal, and said second line output being adapted to deliver a second output signal; a first adder in said first line between said first line input and said first line output, said first adder being adapted to receive said first input signal; a second adder in said second line between said second line input and said second line output, said second adder being adapted to receive said second input signal; a differencing means having differencing means inputs connected to both of said first and second line inputs, said differencing means having a differencing means output, said differencing means creating at said differencing means output a difference signal, said difference signal being the difference between said first and second input signals; a delay means having a delay means input connected to said differencing means output, said delay means having a delay means output, said delay means creating at said delay means output a delayed difference signal which is delayed with respect to said first and second input signals; a control means having a control means input connected to said delay means output for receiving said delayed difference signal, said control means having a control means output connected to each of said first and second adders, said control means delivering an amplitude controlled delayed difference signal to each of said first and second adders whereby each of said first and second adders receives the amplitude controlled delayed difference signal in addition to the first and second input signals received by said first and second adders, respectively; and output sensing means having sensing means inputs connected to each of said first and second lines between its adder and respective output and having a sensing means output connected to said control means, said output sensing means sensing the first and second output signals and automatically adjusting said control means to maintain said amplitude controlled delayed signal at a desired level. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification