ES8607646A1 - Un circuito electronico de enfasis o deenfasis espectral - Google Patents

Un circuito electronico de enfasis o deenfasis espectral

Info

Publication number
ES8607646A1
ES8607646A1 ES536553A ES536553A ES8607646A1 ES 8607646 A1 ES8607646 A1 ES 8607646A1 ES 536553 A ES536553 A ES 536553A ES 536553 A ES536553 A ES 536553A ES 8607646 A1 ES8607646 A1 ES 8607646A1
Authority
ES
Spain
Prior art keywords
control signal
decoder
circuit
emphasis
providing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
ES536553A
Other languages
English (en)
Other versions
ES536553A0 (es
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dolby Laboratories Licensing Corp
Original Assignee
Dolby Laboratories Licensing Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/642,044 external-priority patent/US4700361A/en
Application filed by Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Publication of ES8607646A1 publication Critical patent/ES8607646A1/es
Publication of ES536553A0 publication Critical patent/ES536553A0/es
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/62—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for providing a predistortion of the signal in the transmitter and corresponding correction in the receiver, e.g. for improving the signal/noise ratio
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M3/00—Conversion of analogue values to or from differential modulation
    • H03M3/02—Delta modulation, i.e. one-bit differential modulation
    • H03M3/022—Delta modulation, i.e. one-bit differential modulation with adaptable step size, e.g. adaptive delta modulation [ADM]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation

Abstract

MODIFICACIONES EN UN CIRCUITO ELECTRONICO DE ACENTUACION O DESACENTUACION ESPECTRAL. CONSISTENTES EN QUE: LA SEÑAL DE CONTROL ESTA LIMITADA EN ANCHO DE BANDA A FIN DE CAMBIAR LENTAMENTE CON RELACION A LA SEÑAL DE ENTRADA; INCLUIR UN PRIMER CIRCUITO DE RETARDO QUE RETARDA LA SEÑAL DE ENTRADA APLICADA AL CIRCUITO ADAPTATIVO PARA COMPENSAR LA RESPUESTA LENTA DE LA SEÑAL DE CONTROL; LA LIMITACION DE ANCHO DE BANDA DE LA SEÑAL DE CONTROL SE IMPONE EN EL CIRCUITO DE ANALISIS ESPECTRAL; LA SEÑAL DE INFORMACION SE TRANSMITE CON UN RETARDO RELATIVO A LA SEÑAL DE CONTROL CORRESPONDIENTE AL RETARDO PROPORCIONADO POR EL PRIMER CIRCUITO DE RETARDO; LOS MEDIOS PARA TRANSMITIR LA SEÑAL DE INFORMACION COMPRENDEN UN SISTEMA CONVERTIDOR DE ANALOGICO A DIGITAL; EL SISTEMA CONVERTIDOR DE ANALOGICO A DIGITAL RETARDA ADICIONALMENTE LA SEÑAL DE INFORMACION EN UNA CANTIDAD CORRESPONDIENTE AL RETARDO PROPORCIONADO POR EL PRIMER CIRCUITO DE RETARDO; UN CIRCUITO DE RETARDO ADICIONAL RETARDA LA SEÑAL DE CONTROL TRANSMITIDA EN UNA CANTIDAD CORRESPONDIENTE AL RETARDO PROPORCIONADO POR EL PRIMER CIRCUITO DE RETARDO. SE UTILIZA PARA REDUCIR EL RUIDO EN INSTALACIONES DE CODIFICACION ADAPTATIVO, ANALOGICO-DIGITAL Y VICEVERSA.
ES536553A 1983-10-07 1984-10-05 Un circuito electronico de enfasis o deenfasis espectral Expired ES8607646A1 (es)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US54042183A 1983-10-07 1983-10-07
US54019583A 1983-10-07 1983-10-07
US06/642,044 US4700361A (en) 1983-10-07 1984-08-21 Spectral emphasis and de-emphasis

Publications (2)

Publication Number Publication Date
ES8607646A1 true ES8607646A1 (es) 1986-05-16
ES536553A0 ES536553A0 (es) 1986-05-16

Family

ID=27415316

Family Applications (3)

Application Number Title Priority Date Filing Date
ES536553A Expired ES8607646A1 (es) 1983-10-07 1984-10-05 Un circuito electronico de enfasis o deenfasis espectral
ES548973A Expired ES8704682A1 (es) 1983-10-07 1985-11-16 Un sistema de acentuacion-desacentuacion complementarias
ES548972A Expired ES8704681A1 (es) 1983-10-07 1985-11-16 Un circuito electronico de acentuacion o desacentuacion es- pectral

Family Applications After (2)

Application Number Title Priority Date Filing Date
ES548973A Expired ES8704682A1 (es) 1983-10-07 1985-11-16 Un sistema de acentuacion-desacentuacion complementarias
ES548972A Expired ES8704681A1 (es) 1983-10-07 1985-11-16 Un circuito electronico de acentuacion o desacentuacion es- pectral

Country Status (8)

Country Link
EP (1) EP0138547B1 (es)
KR (1) KR950015080B1 (es)
BR (1) BR8405048A (es)
CA (1) CA1236405A (es)
DE (1) DE3485473D1 (es)
DK (1) DK169693B1 (es)
ES (3) ES8607646A1 (es)
NO (1) NO172669C (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4907087A (en) * 1987-06-10 1990-03-06 Massachusetts Institute Of Technology Transmission of signals through analog channels using adaptive frequency modulation
JPH0575366A (ja) * 1991-09-10 1993-03-26 Pioneer Electron Corp オーデイオ装置における信号処理回路
US5659581A (en) * 1994-12-13 1997-08-19 Paradyne Corporation Modem receiver pre-emphasis

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3678416A (en) * 1971-07-26 1972-07-18 Richard S Burwen Dynamic noise filter having means for varying cutoff point
US4101849A (en) * 1976-11-08 1978-07-18 Dbx, Inc. Adaptive filter

Also Published As

Publication number Publication date
DE3485473D1 (de) 1992-03-05
ES8704681A1 (es) 1987-04-01
ES536553A0 (es) 1986-05-16
DK478984D0 (da) 1984-10-05
KR950015080B1 (ko) 1995-12-21
DK478984A (da) 1985-04-08
ES548973A0 (es) 1987-04-01
EP0138547B1 (en) 1992-01-22
EP0138547A3 (en) 1988-02-24
ES548972A0 (es) 1987-04-01
NO172669C (no) 1993-08-18
ES8704682A1 (es) 1987-04-01
EP0138547A2 (en) 1985-04-24
BR8405048A (pt) 1985-08-20
CA1236405A (en) 1988-05-10
NO844015L (no) 1985-04-09
KR850003086A (ko) 1985-05-28
NO172669B (no) 1993-05-10
DK169693B1 (da) 1995-01-09

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 20050214