Title:
音声信号処理装置
Document Type and Number:
Japanese Patent JP4058176
Kind Code:
B2
Abstract:
An audio signal processor for processing 1-bit signals, comprises an input (40) for receiving a 1-bit signal, means (41,42) for applying a predetermined filter characteristic to the 1-bit signal whereby the signal is also converted to an n-bit signal where n is greater than one, means (43) for determining the absolute value of the n-bit signal, means (46,51) for producing a dynamics control signal dependent on the said absolute value, means (48) for applying the dynamics control signal to the 1-bit input signal, and means (49) for requantizing the dynamics controlled signal as a 1-bit signal and shaping the noise in the requantised 1-bit signal. Circuits for producing LOG base 2 and the corresponding anti-log are also disclosed.
Inventors:
Peter Charles Easty
Peter Dummyn Soap
Christophe Slate
Peter Dummyn Soap
Christophe Slate
Application Number:
JP29229198A
Publication Date:
March 05, 2008
Filing Date:
October 14, 1998
Export Citation:
Assignee:
Sony United Kingdom Limited
International Classes:
G10L21/0208; H03M7/50; G06F7/556; G10L19/00; H03H17/02; H03M3/02; H03M7/00
Domestic Patent References:
| JP6283972A | ||||
| JP8102676A | ||||
| JP9266447A | ||||
| JP9258781A | ||||
| JP8274646A | ||||
| JP9307452A |
Attorney, Agent or Firm:
Yoshitsuno Kakuda
Hironobu Isoyama
Hidemori Matsukuma
Hironobu Isoyama
Hidemori Matsukuma