EP 1482482 A1 20041201 - Frequency expansion for Synthesiser
Title (en)
Frequency expansion for Synthesiser
Title (de)
Frequenzerweiterung für Synthesizer
Title (fr)
Elargissement en frequence pour synthetiseur
Publication
Application
Priority
DE 10324046 A 20030527
Abstract (en)
A signal is filtered with a high-pass filter (2). Subsequently, the performance in the signal is assessed with the help of a performance-assessment device (3). Mixing in a high-frequency signal (S) creates absent high frequency portions in a synthesizer output signal caused by a low scanning rate. An independent claim is also included for a mobile radiotelephone terminal/telephone.
Abstract (de)
Die vorliegende Erfindung betrifft ein Verfahren zum Erzeugen synthetischer Tonsignale mit einem Synthesizer durch Generieren eines Synthesizerausgangssignals A mit einer geringen Abtastrate des Synthesizers 1. Durch die geringe Abtastrate bedingte, fehlende hohe Frequenzanteile des Synthesizerausgangssignals werden durch Hinzumischen eines hochfrequenten Signals S erzeugt. Bevorzugt wird das hochfrequente Signal S in der Amplitude moduliert, und das amplitudenmodulierte Signal S und das Synthesizerausgangssignal A auf eine höhere Abtastrate F2 umgesetzt. <IMAGE>
IPC 1-7
IPC 8 full level
G10H 1/12 (2006.01); G10L 21/038 (2013.01)
CPC (source: EP US)
G10H 1/125 (2013.01 - EP US); G10L 21/038 (2013.01 - EP US); G10H 2230/021 (2013.01 - EP US); G10H 2250/635 (2013.01 - EP US)
Citation (search report)
- [X] EP 1047045 A2 20001025 - SONY CORP [JP]
- [XY] WO 0161687 A1 20010823 - NOKIA MOBILE PHONES LTD [FI], et al
- [X] US 2003044024 A1 20030306 - AARTS RONALDUS MARIA [NL], et al
- [X] US 5455888 A 19951003 - IYENGAR VASU [CA], et al
- [Y] EP 0930704 A2 19990721 - BOSCH GMBH ROBERT [DE]
- [Y] DE 4026476 A1 19920305 - ANT NACHRICHTENTECH [DE]
- [PA] US 2003187663 A1 20031002 - TRUMAN MICHAEL MEAD [US], et al
- [A] US 4700390 A 19871013 - MACHIDA KENJI [JP]
- [X] SCHNITZLER J ED - INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS: "A 13.0 KBIT/S WIDEBAND SPEECH CODEC BASED ON SB-ACELP", PROCEEDINGS OF THE 1998 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING. ICASSP '98. SEATTLE, WA, MAY 12 - 15, 1998, IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING, NEW YORK, NY : IEEE, US, vol. VOL. 1 CONF. 23, 12 May 1998 (1998-05-12), pages 157 - 160, XP000854539, ISBN: 0-7803-4429-4
Citation (examination)
- EP 0706299 A2 19960410 - FIDELIX Y K [JP]
- EP 1473965 A2 20041103 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- EP 1557825 A1 20050727 - NEC CORP [JP]
- WO 03044777 A1 20030530 - KONINKL PHILIPS ELECTRONICS NV [NL], et al
- EP 1126620 A1 20010822 - MATSUSHITA ELECTRIC IND CO LTD [JP]
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 1482482 A1 20041201; CN 1573914 A 20050202; US 2004259601 A1 20041223; US 7630780 B2 20091208
DOCDB simple family (application)
EP 04101464 A 20040408; CN 200410047657 A 20040527; US 83275104 A 20040427