Recording and reproducing system with selective matrix conversion
First Claim
Patent Images
1. An audio signal recording system comprising:
- (a) receiving means for receiving a transmission signal including a modulated signal for a sum signal of left and right signals of a stereophonic audio signal and a modulated signal for a difference signal of said left and right signals;
(b) demodulating means for demodulating said modulated signal for said sum signal and said modulated signal for said difference signal which are included in said transmission signal that has been received by said receiving means; and
(c) recording means for recording on a recording medium said sum signal and said difference signal which have been demodulated by said demodulating means without converting said sum signal and said difference signal into said left and right signals.
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Abstract
An audio signal recording system comprising a first apparatus for generating a sum signal of left and right signals of a stereophonic audio signal and a difference signal of the left and right signals, and a second apparatus for recording on a recording medium the sum signal and the difference signal which have been generated by the first apparatus, without converting the sum signal and difference signal into the left and right signals.
11 Citations
18 Claims
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1. An audio signal recording system comprising:
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(a) receiving means for receiving a transmission signal including a modulated signal for a sum signal of left and right signals of a stereophonic audio signal and a modulated signal for a difference signal of said left and right signals; (b) demodulating means for demodulating said modulated signal for said sum signal and said modulated signal for said difference signal which are included in said transmission signal that has been received by said receiving means; and (c) recording means for recording on a recording medium said sum signal and said difference signal which have been demodulated by said demodulating means without converting said sum signal and said difference signal into said left and right signals. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An audio signal recording system comprising:
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(a) a stereophonic microphone having a first unidirectional microphone unit directed frontally for outputting a sum signal of right and left signals of a stereophonic audio signal and a second bidirectional microphone unit sidewardly directed for outputting a difference signal of said right and left signals; and (b) recording means for recording on a recording medium said sum signal and said difference signal which have been output by said first and second microphone units, without converting said sum signal and said difference signal into said left and right signals. - View Dependent Claims (8, 9, 10, 11)
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12. An audio signal recording and reproducing apparatus comprising:
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(a) receiving means for receiving a transmission signal including a modulated signal for a sum signal of left and right signals of a stereophonic audio signal and a modulated signal for a difference signal of said left and right signals; (b) demodulating means for demodulating said modulated signal for said sum signal and said modulated signal for said sum signal and said modulated signal for said difference signal which are included in said transmission signal that has been received by said receiving means; (c) recording means for recording on a recording medium said sum signal and said difference signal which have been demodulated by said demodulating means; (d) reproducing means for reproducing said sum signal and said difference signal recorded on said recording medium; (e) selection means arranged to have as inputs thereto said sum signal and said difference signal reproduced by said reproducing means and said sum signal and said difference signal demodulated by said demodulating means for outputting either said sum signal and said difference signal demodulated by said demodulating means or said sum signal and said difference signal reproduced by said reproducing means; and (f) a matrix circuit for converting said sum signal and said difference signal which have been output by said selection means into said left and right signals, and for outputting said left and right signals. - View Dependent Claims (13, 14, 15)
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16. An audio signal recording and reproducing apparatus comprising:
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(a) a stereophonic microphone having a first unidirectional microphone unit frontally directed for outputting a sum signal of right and left signals of a stereophonic audio signal and a second bidirectional microphone unit sidewardly directed for outputting a difference signal of said right and left signals; (b) recording means for recording on a recording medium said signal and said difference signal which have been output by said first and second microphone units. (c) reproducing means for reproducing said sum signal and said difference signal recorded on said recording medium; (d) selection means arranged to have as inputs thereto said sum signal and said difference signal reproduced by said reproducing means and said sum signal and said difference signal output by said first and second microphone units for outputting either said sum signal and said difference signal output by said first and second microphone units or said sum signal and said difference signal reproduced by said reproducing means; and (e) a matrix circuit for converting said sum signal and said difference signal which have been output by said selection means into said left and right signals, and for outputting said left and right signals. - View Dependent Claims (17, 18)
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Specification