Audio signal reproducing apparatus

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EP 0 664 660 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	09.08.1995 Bulletin 1995/32

(43)	Date of publication A2:
	26.07.1995 Bulletin 1995/30

(21)	Application number: 95104929.5

(22)	Date of filing: 18.01.1991

(51)	International Patent Classification (IPC)⁶: H04S 1/00, H04R 5/033

(84)	Designated Contracting States:
	DE FR GB NL

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Priority:

19.01.1990 JP 8514/90
19.01.1990 JP 8520/90

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	91902738.3 / 0464217

(71)	Applicant: SONY CORPORATION
	Tokyo (JP)

(72)	Inventors:
	Inanaga, Kiyofumi, c/o Sony Corporation Tokyo 141 (JP) Sogawa, Hiroyuki, c/o Sony Corporation Tokyo 141 (JP) Iida, Yasuhiro, c/o Sony Corporation Tokyo 141 (JP) Yabe, Susumu, c/o Sony Corporation Tokyo 141 (JP)

(74)	Representative: Ayers, Martyn Lewis Stanley
	J.A. KEMP & CO. 14 South Square Gray's Inn London WC1R 5LX London WC1R 5LX (GB)

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References cited: :


	Remarks:
	This application was filed on 03 - 04 - 1995 as a divisional application to the application mentioned under INID code 60.

(54)	Audio signal reproducing apparatus

(57) In an audio signal processing apparatus information on the transfer characteristics from virtual sound sources to both ears of a listener for each given rotational angle depending upon the movement of the head M of the listener is stored in storing means 62. The rotational angular position of the head of the listener is detected by detecting means 45L, 45R and 53 at a solution higher than that of the information of the transfer characteristics stored in said storing means. The information on at least two transfer characteristics in the vicinity of the rotational angular position represented by the detection outputs from detecting means is read from the storing means. The information on the transfer characteristics in the rotational angular position of the head represented by the detection output is interpolation operated by interpolation operating means 61. Based upon the information on the transfer characteristics determined by the interpolation operation means, left and right channel audio signals are processed by audio signal processing means 63 for achieving a proper binaural reproduction relative to the virtual sound sources.

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