Sound field control device
First Claim
1. A sound field control device comprising:
- a surround decoder for decoding an input surround encode signal and thereby generating three channel signals of L, C and R which are assumed to be reproduced respectively in front left, front center and front right positions and one channel signal of S which is assumed to be reproduced in a rear position;
output terminals for outputting the three channel signals of L, C and R for reproduction in the front left, front center and front right positions;
first reflected sound generation means for generating a reflected sound of the signal S;
second reflected sound generation means for generating another reflected sound signal of the signal S;
first addition means for adding the reflected sound signal generated by the first reflected sound generation means and the signal S together;
phase shifting means for shifting phase of the reflected sound signal generated by the second reflected sound generation means in accordance with frequency of the reflected sound signal;
second addition means for adding a reflected sound signal provided by the phase shifting means and the signal S together; and
output terminals for outputting signals of RL and RR channels for reproduction of these signals in rear left and rear right positions or reverse positions,at least one of said first and second addition means adding the reflected sound signal and the signal S together at a rate at which a value obtained by dividing level of the reflected sound signal by level of the signal S will become 0.5 or over.
1 Assignment
0 Petitions
Accused Products
Abstract
A sound field control device includes a surround decoder for decoding an input surround encode signal and generating three channel signals of L, C and R to be reproduced in front left, front center and front right and one channel signal of S to be reproduced in the rear, output terminals for outputting the three channel signals, a first reflected sound generation section generating a reflected sound of the signal S, a second reflected sound generation section generating another reflected sound signal of the signal S, a first adder adding the reflected sound signal generated by the first reflected sound generation section and the signal S together, a phase shifting section shifting phase of the reflected sound signal generated by the second reflected sound generation section according to frequency of the reflected sound signal, a second adder adding a reflected sound signal provided by the phase shifting section and the signal S together, and output terminals for outputting signals of RL and RR channels for reproduction in rear left and rear right positions or reverse positions. At least one of the first and second adders adds the reflected sound signal and the signal S together at a rate at which a value obtained by dividing level of the reflected sound signal by level of the signal S will become 0.5 or over.
43 Citations
3 Claims
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1. A sound field control device comprising:
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a surround decoder for decoding an input surround encode signal and thereby generating three channel signals of L, C and R which are assumed to be reproduced respectively in front left, front center and front right positions and one channel signal of S which is assumed to be reproduced in a rear position; output terminals for outputting the three channel signals of L, C and R for reproduction in the front left, front center and front right positions; first reflected sound generation means for generating a reflected sound of the signal S; second reflected sound generation means for generating another reflected sound signal of the signal S; first addition means for adding the reflected sound signal generated by the first reflected sound generation means and the signal S together; phase shifting means for shifting phase of the reflected sound signal generated by the second reflected sound generation means in accordance with frequency of the reflected sound signal; second addition means for adding a reflected sound signal provided by the phase shifting means and the signal S together; and output terminals for outputting signals of RL and RR channels for reproduction of these signals in rear left and rear right positions or reverse positions, at least one of said first and second addition means adding the reflected sound signal and the signal S together at a rate at which a value obtained by dividing level of the reflected sound signal by level of the signal S will become 0.5 or over. - View Dependent Claims (2, 3)
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Specification