MX174056B - Metodo de retorno para la frecuencia de radio para la television por cable - Google Patents

Metodo de retorno para la frecuencia de radio para la television por cable

Info

Publication number
MX174056B
MX174056B MX024989A MX2498991A MX174056B MX 174056 B MX174056 B MX 174056B MX 024989 A MX024989 A MX 024989A MX 2498991 A MX2498991 A MX 2498991A MX 174056 B MX174056 B MX 174056B
Authority
MX
Mexico
Prior art keywords
remote units
per group
units per
groups
remote
Prior art date
Application number
MX024989A
Other languages
English (en)
Inventor
Jay C Mcmullan Jr
David J Naddor
Robert J Ii Beyers
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
Priority claimed from US07/498,083 external-priority patent/US5235619A/en
Priority claimed from US07/498,084 external-priority patent/US5155590A/en
Priority claimed from US07/503,422 external-priority patent/US5142690A/en
Application filed by Scientific Atlanta filed Critical Scientific Atlanta
Publication of MX174056B publication Critical patent/MX174056B/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/42—Arrangements for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/76—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet
    • H04H60/81—Arrangements characterised by transmission systems other than for broadcast, e.g. the Internet characterised by the transmission system itself
    • H04H60/93—Wired transmission systems
    • H04H60/96—CATV systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes
    • 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
    • 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
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Graphics (AREA)
  • Business, Economics & Management (AREA)
  • General Business, Economics & Management (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

La presente invención se refiere a método de retorno para la frecuencia de radio para la televisión por cable, para asignar una población de unidades remotas entre una pluralidad de grupos mediante un control central para un sistema de regreso de datos, las unidades remotas cada una tiene un identificador singular asociado respectivamente con la misma, el método está caracterizado por los pasos de: seleccionar un número máximo de unidades remotas por un grupo y un número mínimo de grupos; asignar las unidades remotas al número mínimo de grupos de unidades remotas de conformidad con los identificadores singulares respectivos; determinar un número promedio de unidades remotas por grupo a medida que las unidades remotas se asignan al mismo; comparar el número promedio de unidades remotas por grupo al número máximo de unidades remotas por grupo; cambiar el número de grupos si el número promedio de unidades remotas por grupo excede el número máximo de unidades remotas por grupo; repetir los pasos (c) a (e) mientras que el número promedio de unidades remotas por grupo es mayor que el número máximo de unidades remotas por grupo; y comunicar las asignaciones de grupo respectivas hasta las unidades remotas del control central.
MX024989A 1990-03-20 1991-03-20 Metodo de retorno para la frecuencia de radio para la television por cable MX174056B (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US07/498,083 US5235619A (en) 1990-03-20 1990-03-20 Cable television radio frequency subscriber data transmission apparatus and rf return method
US07/498,084 US5155590A (en) 1990-03-20 1990-03-20 System for data channel level control
US07/503,422 US5142690A (en) 1990-03-20 1990-04-02 Cable television radio frequency data processor
US07/562,675 US5255086A (en) 1990-03-20 1990-08-03 Method and apparatus for RF data transfer in a CATV system

Publications (1)

Publication Number Publication Date
MX174056B true MX174056B (es) 1994-04-06

Family

ID=27504392

Family Applications (1)

Application Number Title Priority Date Filing Date
MX024989A MX174056B (es) 1990-03-20 1991-03-20 Metodo de retorno para la frecuencia de radio para la television por cable

Country Status (3)

Country Link
US (1) US5255086A (es)
CN (1) CN1059250A (es)
MX (1) MX174056B (es)

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Also Published As

Publication number Publication date
US5255086A (en) 1993-10-19
CN1059250A (zh) 1992-03-04

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