Signal analysis device, signal control device, its system, method, and program

Patent metadata

Field	Value
Publication number	US-9905242-B2
Application number	US-66694108-A
Country	US
Kind code	B2
Filing date	Jun 26, 2008
Priority date	Jun 27, 2007
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

A signal analysis device includes: a signal reception unit which receives an input signal containing a plurality of constituent elements; and a signal analysis unit which generates analysis information indicating the relationship between the constituent elements from the input signal.

First claim

The invention claimed is:

1. A signal analysis device in a signal analysis control system having the signal analysis device and a signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising:
a processor programmed to:
input an input signal of a single channel to be transmitted to said signal control device, including objective sound and background sound;
decompose said input signal into frequency components to obtain a converted signal, estimate said background sound from said converted signal, calculate a suppression coefficient to be applied said signal including objective sound and background sound, based upon the converted signal and an information of the estimated background sound, for suppressing said background sound by said signal control device, encode said suppression coefficient to generate analysis information; and
transmit said signal of said single channel including objective sound and said background sound and said analysis information to said signal control device via a network or a recording medium, wherein said signal including objective sound and background sound is transmitted without separating objective sound and background sound.

2. A signal control device in a signal analysis control system having a signal analysis device and the signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising:
a processor programmed to:
receive, from said signal analysis device, a signal of a single channel including objective sound and background sound that objective sound and background sound are not separated, and analysis information in which a suppression coefficient to be applied said signal including objective sound and background sound for suppressing said background sound was encoded, via a network or a recording medium, wherein said suppression coefficient was generated based upon a converted signal that obtained by decomposing said signal into frequency components, and an information of the background sound that estimated from said converted signal; and
suppress and control said background sound based upon said analysis information.

3. A signal control device in a signal analysis control system having a signal analysis device and the signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising:
a processor programmed to:
receive a signal of a single channel including objective sound and background sound that objective sound and background sound are not separated, and analysis information in which a suppression coefficient to be applied said signal including objective sound and background sound for suppressing said background sound was encoded, from said signal analysis device, via a network or a recording medium; and
obtain a signal control information for modifying said suppression coefficient, obtain said suppression coefficient by decoding the received analysis information, modify said suppression coefficient based upon said signal control information, suppress and control said background sound based upon the modified suppression coefficient.

4. A signal control device in a signal analysis control system having a signal analysis device and the signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising:
a processor programmed to:
receive, from said signal analysis device, a signal of a single channel including objective sound and background sound that objective sound and background sound are not separated, and analysis information in which a suppression coefficient to be applied said signal including objective sound and background sound for suppressing said background sound was encoded, via a network or a recording medium; and
receive component element rendering information for controlling a localization of said objective sound and said background sound, suppress and control said background sound based upon said analysis information and said component element rendering information, and generate an output signal in which the localization of said objective sound is controlled.

5. A signal control device according to claim 4 , wherein the processor is further programmed to:
receive signal control information for controlling a specific component element, control said component element based upon said signal control information, said analysis information, and said component element rendering information, and generate the output signal.

6. A signal control device according to claim 5 , wherein the processor is further programmed to:
generate a parameter indicative of a relation between said signal and said component element based upon said signal and said analysis information, and modifies said parameter based upon said signal control information; and
convert said component element rendering information into rendering information indicative of a relation between said signal and said output signal based upon said modified parameter.

7. A signal control device according to claim 5 , wherein the processor is further programmed to:
generate a parameter indicative of a relation between said signal and said component element based upon said analysis information and said signal control information, and modify said parameter based upon said signal control information; and convert said component element rendering information into rendering information indicative of a relation between said signal and said output signal based upon said modified parameter.

8. A signal analysis method in a signal analysis control system having a signal analysis device and a signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising the steps of:
decomposing an input signal of a single channel to be transmitted to said signal control device including objective sound and background sound into frequency components to obtain a converted signal, estimating said background sound from said converted signal, calculating a suppression coefficient to be applied said signal including objective sound and background sound based upon the converted signal and an information of the estimated background sound for suppressing said background sound by said signal control device, and encoding said suppression coefficient to generate analysis information; and
transmitting said signal of said single channel including said objective sound and said background sound, and said analysis information to the signal control device via a network or a recording medium, wherein said signal including objective sound and background sound is transmitted without separating objective sound and background sound.

9. A signal control method in a signal analysis control system having a signal analysis device and a signal control device capable of conducting transmission and reception of a signal via a network or a recording medium, comprising the steps of:
receiving, from said signal analysis device, a signal of a single channel including objective sound and background sound that objective sound and background sound are not separated, and analysis information in which a suppression coefficient to be applied said signal including objective sound and background sound for suppressing said background sound was encoded, via a network or a recording medium, wherein said suppression coefficient was generated based upon a converted signal that obtained by decomposing said signal into frequency components, and an information of the background sound that estimated from said converted signal; and
suppressing and controlling said background sound base

Assignees

• Shimada Osamu
• Nomura Toshiyuki
• Sugiyama Akihiko
• Houshuyama Osamu
• Nec Corp

Inventors

• Shimada Osamu
• Nomura Toshiyuki
• Sugiyama Akihiko
• Houshuyama Osamu

Classifications

• H04S2400/13

  Aspects of volume control, not necessarily automatic, in stereophonic sound systems · CPC title

• G10L21/0208 Primary

  Noise filtering · CPC title

• H03G3/32

  the control being dependent upon ambient noise level or sound level · CPC title

• G10L25/84 Primary

  for discriminating voice from noise · CPC title