Invention Grant
- Patent Title: Method and device for frequency compression with selective frequency shifting
- Patent Title (中): 具有选择性频移的频率压缩方法和装置
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Application No.: US13248167Application Date: 2011-09-29
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Publication No.: US09031269B2Publication Date: 2015-05-12
- Inventor: Robert Bäuml , Ulrich Kornagel , Thomas Pilgrim
- Applicant: Robert Bäuml , Ulrich Kornagel , Thomas Pilgrim
- Applicant Address: SG Singapore
- Assignee: Siemens Medical Instruments Pte. Ltd.
- Current Assignee: Siemens Medical Instruments Pte. Ltd.
- Current Assignee Address: SG Singapore
- Agent Laurence A. Greenberg; Werner H. Stemer; Ralph E. Locher
- Priority: DE102010041653 20100929
- Main IPC: H04R25/00
- IPC: H04R25/00 ; H03G5/00 ; G10L21/00 ; G10L19/02

Abstract:
A method and device for frequency compression of audio signals to reduce the occurrence of artifacts. A component of the audio signal having a plurality of frequency channels is shifted from a first frequency channel into a second frequency channel. A dominant instantaneous frequency is determined in the first frequency channel. During shifting or mapping, first the entire first frequency channel, including the dominant instantaneous frequency, is shifted or mapped into the second frequency channel, wherein the dominant instantaneous frequency obtains an intermediate frequency position. A final frequency position for the dominant instantaneous frequency is determined using a predefined compression characteristic in the second frequency channel, starting from the frequency position of the dominant instantaneous frequency in the first frequency channel. Finally, the dominant instantaneous frequency is shifted or mapped from the intermediate frequency position to the final frequency position.
Public/Granted literature
- US20120076333A1 METHOD AND DEVICE FOR FREQUENCY COMPRESSION WITH SELECTIVE FREQUENCY SHIFTING Public/Granted day:2012-03-29
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