MX172531B - Aparato de transmision de datos del suscritor por frecuencia de radio para television por cable y metodo de retorno rf. - Google Patents

Aparato de transmision de datos del suscritor por frecuencia de radio para television por cable y metodo de retorno rf.

Info

Publication number
MX172531B
MX172531B MX025001A MX2500191A MX172531B MX 172531 B MX172531 B MX 172531B MX 025001 A MX025001 A MX 025001A MX 2500191 A MX2500191 A MX 2500191A MX 172531 B MX172531 B MX 172531B
Authority
MX
Mexico
Prior art keywords
response
system administrator
programmable
data transmission
radio frequency
Prior art date
Application number
MX025001A
Other languages
English (en)
Inventor
Randolph J Schaulos
Gregory S Durden
Jesse M Still
Robert J Edwards
Anthony J Wasiliwski
Ray T Haman Jr
Lamar E West
Douglas J Hoder
Donovan S White
Donald R Huntley
John Anson Kennedy
Robert J Ii Beyers
Emory L Mcginty Jr
David J Naddor
Jay C Mcmullan Jr
Charles R Bramhall
Original Assignee
Scientific Atlanta
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
Application filed by Scientific Atlanta filed Critical Scientific Atlanta
Publication of MX172531B publication Critical patent/MX172531B/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/02—Channels characterised by the type of signal
    • H04L5/06—Channels characterised by the type of signal the signals being represented by different frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2032—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner
    • H04L27/2035—Modulator circuits; Transmitter circuits for discrete phase modulation, e.g. in which the phase of the carrier is modulated in a nominally instantaneous manner using a single or unspecified number of carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
    • H04L27/2275—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals
    • H04L27/2276—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses the received modulated signals using frequency multiplication or harmonic tracking
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25866—Management of end-user data
    • H04N21/25891—Management of end-user data being end-user preferences
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/10—Adaptations for transmission by electrical cable
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/173—Analogue secrecy systems; Analogue subscription systems with two-way working, e.g. subscriber sending a programme selection signal
    • H04N7/17309—Transmission or handling of upstream communications

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Computer Graphics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Testing, Inspecting, Measuring Of Stereoscopic Televisions And Televisions (AREA)
  • Details Of Television Systems (AREA)
  • Selective Calling Equipment (AREA)
  • Radio Relay Systems (AREA)

Abstract

La presente invención se refiere a un aparato y método para el control de nivel para un canal de datos, que comprende un administrador de sistema para controlar una pluralidad de terminales de televisión a través de un sistema de distribución de señales de cable televisión, un aparato de calibración caracterizado por: un aparato transmisor programable colocado en los terminales de televisión para transmitir una comunicación de respuesta que tiene una frecuencia de niveles a una frecuencia de calibración específica, en respuesta a un mando dirigido generado por el administrador de sistema, un aparato receptor programable colocado en el administrador de sistema para recibir la comunicación de respuesta a la frecuencia de calibración específica para determinar una indicación de la intensidad de la señal recibida para cada nivel recibido, y un controlador acoplado con el receptor para determinar un nivel de transmisión óptimo para el funcionamiento del aparato transmisor programable a la frecuencia de calibración desde las intensidades de señal determinadas.
MX025001A 1990-03-20 1991-03-20 Aparato de transmision de datos del suscritor por frecuencia de radio para television por cable y metodo de retorno rf. MX172531B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/498,084 US5155590A (en) 1990-03-20 1990-03-20 System for data channel level control

Publications (1)

Publication Number Publication Date
MX172531B true MX172531B (es) 1993-12-17

Family

ID=23979542

Family Applications (1)

Application Number Title Priority Date Filing Date
MX025001A MX172531B (es) 1990-03-20 1991-03-20 Aparato de transmision de datos del suscritor por frecuencia de radio para television por cable y metodo de retorno rf.

Country Status (9)

Country Link
US (1) US5155590A (es)
EP (1) EP0532503B1 (es)
JP (1) JP3313704B2 (es)
CN (1) CN1056787A (es)
AU (1) AU642367B2 (es)
BR (1) BR9106265A (es)
CA (1) CA2078548A1 (es)
MX (1) MX172531B (es)
WO (1) WO1991015063A1 (es)

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Also Published As

Publication number Publication date
JPH05505921A (ja) 1993-08-26
WO1991015063A1 (en) 1991-10-03
AU7568591A (en) 1991-10-21
EP0532503B1 (en) 1997-05-07
JP3313704B2 (ja) 2002-08-12
EP0532503A4 (en) 1993-04-28
AU642367B2 (en) 1993-10-14
CA2078548A1 (en) 1991-09-21
CN1056787A (zh) 1991-12-04
US5155590A (en) 1992-10-13
EP0532503A1 (en) 1993-03-24
BR9106265A (pt) 1993-04-13

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