EP1272004A3

Audio signal processing

Abstract

A method for processing and transducing audio signals. An audio system has a first audio signal and a second audio signal that have amplitudes. A method for processing the audio signals includes dividing the first audio signal into a first spectral band signal and a second spectral band signal; scaling the first spectral band signal by a first scaling factor proportional to the amplitude of the second audio signal; and scaling the first spectral band signal by a second scaling factor to create a second signal portion. Other portions of the disclosure include application of the signal processing method to multichannel audio systems, and to audio systems having different combinations of directional loudspeakers, full range loudspeakers, and limited range loudspeakers.

EP1272004A3, drawing sheet 1 — Sheet 1 of 1

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Projected expiry passed 12 June 2022, 4.3 years ago.

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Every citation, both waysCites: the store holds 7 of 8

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
EP0858243A2	Cites	European Patent Office (EPO)	DXA	Search report	1-3,5,13,26,27,46
DE19847689A1	Cites	Germany	X	Search report	42-45
US5557680A	Cites	United States of America	X	Search report	28-35
US5621804A	Cites	United States of America	XY	Search report	28-33,35
US5870484A	Cites	United States of America	YA	Search report	34
WO9000851A1	Cites	World Intellectual Property Organization (WIPO)	X	Search report	42-45
WO9725834A2	Cites	World Intellectual Property Organization (WIPO)	A	Search report	1-27,36-41,46-54
DAMASKE P: "HEAD-RELATED TWO-CHANNEL STEREOPHONY WITH LOUDSPEAKER REPRODUCTION", JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA, AMERICAN INSTITUTE OF PHYSICS. NEW YORK, US, vol. 50, no. 4, PART 2, October 1971 (1971-10-01), pages 1109 - 1115, XP000761793, ISSN: 0001-4966	Non-patent	–	–	Search report	–

12 members in 5 offices

This recordMember, by publication datePriority claim

Priority claims5

Priority claims
Document	Office	Kind	Date
886868	United States of America	–	2001-06-21
88686801	United States of America	A	2001-06-21
88686801	United States of America	A	2001-06-21
886868	–	–	–
US20010886868	–	–	–

Members12

Family members, oldest first
Document	Office	Kind
EP1272004A2	European Patent Office (EPO)	A2	2003-01-02
US2003002693A1	United States of America	A1	2003-01-02
JP2003047099A	Japan	A	2003-02-14
CN1406100A	China	A	2003-03-26
HK1053575A1	Hong Kong, China	A1	2003-10-24
EP1272004A3This record	European Patent Office (EPO)	A3	2004-07-21
US2006291669A1	United States of America	A1	2006-12-28
US7164768B2	United States of America	B2	2007-01-16
CN100394829C	China	C	2008-06-11
JP4309100B2	Japan	B2	2009-08-05
US8175292B2	United States of America	B2	2012-05-08
EP1272004B1	European Patent Office (EPO)	B1	2015-06-10

27 legal events, as 3 offices reported them to INPADOC

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	Event	Code	Office
2021-05-31	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2021-01-01	Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal feeWithdrawnR119	R119	DE
2019-10-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2019-04-30	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2019-02-27	Gb: european patent ceased through non-payment of renewal feeCeasedGBPC	GBPC	EP
2017-07-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2016-05-18	No opposition filedOpposition26N	26N	EP
2016-04-15	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2016-04-15	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2016-03-11	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2015-07-23	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2015-06-10	Designated contracting statesAK	AK	EP
2015-06-10	European patent grantedGrantedFG4D	FG4D	GB
2015-05-16	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2015-05-01	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2015-03-25	Intention to grant announcedINTG	INTG	EP
2015-02-27	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2007-04-11	First examination report despatched17Q	17Q	EP
2007-03-07	Observations by third partiesORIGINAL CODE: EPIDOSNTIPATPAC	TPAC	EP
2005-04-13	Designation fees paidAKX	AKX	EP
2005-03-16	Request for examination filed17P	17P	EP
2004-07-21	Designated contracting statesAK	AK	EP
2004-07-21	Request for extension of the european patentAX	AX	EP
2004-06-04	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2003-01-02	Designated contracting statesAK	AK	EP
2003-01-02	Request for extension of the european patentAL;LT;LV;MK;RO;SIAX	AX	EP
2002-11-15	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP

Audio signal processing

Abstract

Term

Priority claims5

Members12

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Titles3

Classification

Designated states2