A virtual surround sound device
Abstract
An apparatus and method of reproducing a 2-channel virtual sound while dynamically controlling a sweet spot and crosstalk cancellation are disclosed. The method includes: receiving broadband signals, setting compensation filter coefficients according to response characteristics of bands and setting stereophonic transfer functions according to spectrum analysis; down mixing an input multi-channel signal into two channel signals by adding head related transfer functions (HRTFs) measured in a near-field and a far-field to the input multi-channel signal, canceling crosstalk of the down mixed signals on the basis of compensation filter coefficients calculated using the set stereophonic transfer functions, and compensating levels and phases of the crosstalk cancelled signals on the basis of the set compensation filter coefficients for each of the bands.

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Projected expiry passed 17 December 2024, 1.8 years ago.
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1 sheet
Sheet 1
Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| US2002038158A1 | Cites | United States of America | XA | Search report | 1,2 |
| US6449368B1 | Cites | United States of America | A | Search report | 1,2,6,14,21,24 |
| US6574339B1 | Cites | United States of America | A | Search report | 1,2,6,14,21,24 |
| WO9725834A2 | Cites | World Intellectual Property Organization (WIPO) | A | Search report | 1,2,6,14,21,24 |
6 members in 5 offices
Priority claims4
| Document | Office | Kind | Date |
|---|---|---|---|
| 20030092510 | Republic of Korea | A | |
| 2003092510 | Republic of Korea | – | |
| 2003092510 | – | – | – |
| KR20030092510 | – | – | – |
Members6
| Document | Office | Kind | |
|---|---|---|---|
| CN1630434A | China | A | |
| EP1545154A2 | European Patent Office (EPO) | A2 | |
| KR20050060789A | Republic of Korea | A | |
| US2005135643A1 | United States of America | A1 | |
| JP2005184837A | Japan | A | |
| EP1545154A3This record | European Patent Office (EPO) | A3 |
11 legal events, as the office reported them to INPADOC
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| Event | Code | |
|---|---|---|
| Application deemed to be withdrawnWithdrawn18D | 18D | |
| Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWNSTAA | STAA | |
| First examination report despatched17Q | 17Q | |
| Designation fees paidAKX | AKX | |
| Request for examination filed17P | 17P | |
| Designated contracting statesAK | AK | |
| Request for extension of the european patentAX | AX | |
| Search report despatchedORIGINAL CODE: 0009013PUAL | PUAL | |
| Designated contracting statesAK | AK | |
| Request for extension of the european patentAX | AX | |
| Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI | PUAI |
Numbers
- Publication
- 1545154
- Publication, DOCDB
- 1545154
- Publication, EPODOC
- EP1545154
- Application
- 4106698
- Application, DOCDB
- 04106698
- Application, EPODOC
- EP20040106698
Titles3
- German
- Virtuelles Raumklang Gerät
- English
- A virtual surround sound device
- French
- Haut-parleur virtuel paramétrique et système de son multivoie
Classification
- CPC, 4
- H04S7/301
- H04S3/008
- H04S7/307
- H04S2400/01
- IPC, 5
- H04R3 12
- H04S3 00
- H04S1 00
- H04S5 02
- H04S7 00
Designated states36
- Contracting states, 30
- Austria
- Belgium
- Bulgaria
- Switzerland
- Cyprus
- Czechia
- Germany
- Denmark
- Estonia
- Spain
- Finland
- France
- United Kingdom
- Greece
- Hungary
- Ireland
- Iceland
- Italy
- Liechtenstein
- Lithuania
- Luxembourg
- Monaco
- Netherlands (Kingdom of the)
- Poland
and 6 moreShow fewer
- Portugal
- Romania
- Sweden
- Slovenia
- Slovakia
- Türkiye
- Extension states, 6
- Albania
- Bosnia and Herzegovina
- Croatia
- Latvia
- North Macedonia
- Yugoslavia, later Serbia and Montenegro (until 2006)