H04B1/667 - CPC Classification Index

ClassID:

223427 ⎘

H04B1/667 - 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 for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands

Recent Application in this class:

20250266859

2025-08-21

TRIGGER FRAME FOR DYNAMIC SUB-BAND OPERATION

20240087583

2024-03-14

System and method for processing audio data into a plurality of frequency components

20240080048

2024-03-07

CONFIGURABLE FILTER FOR ASYMMETRICAL RADIO FREQUENCY COMMUNICATION

20230162747

2023-05-25

System and method for processing audio data into a plurality of frequency components

20220407545

2022-12-22

Generating a digital modulation signal and an analog modulation signal according to an input signal of the frequency modulation circuit

20220223164

2022-07-14

System and method for processing audio data into a plurality of frequency components

20210344366

2021-11-04

Generating a digital modulation signal and an analog modulation signal according to an input signal of the frequency modulation circuit

20210314348

2021-10-07

Anti-phishing

20210243222

2021-08-05

Fraud prevention via distinctive URL display

#10

20210194523

2021-06-24

Signal generator and signal generation method

#11

20210090585

2021-03-25

System and method for processing audio data

#12

20190279653

2019-09-12

System and method for processing audio data

#13

20190158530

2019-05-23

Fraud prevention via distinctive URL display

#14

20190098042

2019-03-28

Anti-phishing

#15

20180278962

2018-09-27

System and method for processing audio data

#16

20180278666

2018-09-27

System and method for processing audio data

#17

20180278291

2018-09-27

DATA TRANSMISSION METHOD, APPARATUS, AND DEVICE FOR MULTI-TRANSMISSION TIME INTERVAL TTI SYSTEM

#18

20180278241

2018-09-27

System and method for processing audio data

#19

20180277130

2018-09-27

System and method for processing audio data

#20

20170257391

2017-09-07

Classifier Bypass Based On Message Sender Trust and Verification

#21

20150288716

2015-10-08

Fraud prevention via distinctive URL display

#22

20150288714

2015-10-08

Method for computer security based on message and message sender

#23

20140122065

2014-05-01

Voice coding device, voice decoding device, voice coding method and voice decoding method

#24

20140081628

2014-03-20

Reproduce a voice for a speaker based on vocal tract sensing using ultra wide band radar

#25

20110119066

2011-05-19

Signal encoding device and signal encoding method, signal decoding device and signal decoding method, program, and recording medium

#26

20100217608

2010-08-26

SOUND DECODER AND SOUND DECODING METHOD WITH DEMULTIPLEXING ORDER DETERMINATION

#27

20100138219

2010-06-03

Spectrum coding apparatus and decoding apparatus that respectively encodes and decodes a spectrum including a first band and a second band

#28

20090203395

2009-08-13

AMPLITUDE MODULATION RADIO TRANSMISSION WITH EXTENDED BANDWIDTH

#29

20090068951

2009-03-12

Spectrum-blind sampling and reconstruction of multi-band signals

#30

20080281603

2008-11-13

Sound encoder and sound decoder

#31

20080262835

2008-10-23

Encoding device, decoding device, and method thereof

#32

20080253442

2008-10-16

Data processing apparatus

#33

20080071552

2008-03-20

Sound encoder and sound decoder

#34

20080071551

2008-03-20

Sound encoder and sound encoding method with multiplexing order determination

#35

20080052088

2008-02-28

Sound encoder and sound decoder

#36

20080052087

2008-02-28

Sound decoder and sound decoding method with demultiplexing order determination

#37

20080052086

2008-02-28

Sound encoder and sound decoder

#38

20080052085

2008-02-28

Sound encoder and sound decoder

#39

20080052084

2008-02-28

Sound encoder and sound decoder

#40

20070150267

2007-06-28

Signal encoding device and signal encoding method, signal decoding device and signal decoding method, program, and recording medium

#41

20070136049

2007-06-14

Sound encoder and sound decoder

#42

20060256971

2006-11-16

Method for determining time borders and frequency resolutions for spectral envelope coding

#43

20060251178

2006-11-09

Spectrum coding/decoding apparatus and method for reducing distortion of two band spectrums

#44

20060206341

2006-09-14

Record carrier having an encoded wide-band digital audio signal recorded thereon

#45

20060115092

2006-06-01

Encoding device and decoding device

#46

20060093048

2006-05-04

Partial spectral loss concealment in transform codecs

#47

20050163234

2005-07-28

Partial spectral loss concealment in transform codecs

#48

20050141721

2005-06-30

Coding of stereo signals

#49

20050099938

2005-05-12

Method and apparatus for multi-stream transmission with time and frequency diversity in an orthogonal frequency division multiplexing (OFDM) communication system