H04B1/1669 - CPC Classification Index

ClassID:

223361 ⎘

H04B1/1669 - CPC Classification

Classification description:

Details of transmission systems, not covered by a single one of groups - ; Details of transmission systems not characterised by the medium used for transmission; Receivers; Circuits adapted for the reception of stereophonic signals; Reduction of noise by manipulation of the baseband composite stereophonic signal or the decoded left and right channels of the demodulated composite stereo signal

Sub-classes:

H04B1/1676 » {of the sum or difference signal} 32
H04B1/1684 » {of the decoded left or right stereo channel} 4

Recent Application in this class:

20190103891

Method for limiting radio noise, in particular in the FM band, by polynomial interpolation

20180018976

Stereo-phonic frequency modulation receiver and method for separating dual sound channels

20120033764

Method and apparatus for audio noise reduction of frequency modulation (FM) receiver

20110250859

Pilot based adaptation for FM radio receiver

20080287086

Noise suppression apparatus, FM receiving apparatus and FM receiving apparatus adjustment method

20080008332

Signal processing circuit and signal processing method

20050153674

Noise removal device