MX9305537A - CODIFICADOR DE SEñAL DE TELEVISION DIGITAL QAM MULTIPLE. - Google Patents

CODIFICADOR DE SEñAL DE TELEVISION DIGITAL QAM MULTIPLE.

Info

Publication number
MX9305537A
MX9305537A MX9305537A MX9305537A MX9305537A MX 9305537 A MX9305537 A MX 9305537A MX 9305537 A MX9305537 A MX 9305537A MX 9305537 A MX9305537 A MX 9305537A MX 9305537 A MX9305537 A MX 9305537A
Authority
MX
Mexico
Prior art keywords
qam
priority
television signal
normal
signal encoder
Prior art date
Application number
MX9305537A
Other languages
English (en)
Inventor
Tian Jun Wang
Lauren Ann Christopher
Original Assignee
Thomson Consumer Electronics
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 GB929219185A external-priority patent/GB9219185D0/en
Application filed by Thomson Consumer Electronics filed Critical Thomson Consumer Electronics
Publication of MX9305537A publication Critical patent/MX9305537A/es

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/015—High-definition television systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/3488—Multiresolution systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
    • H04N19/37—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability with arrangements for assigning different transmission priorities to video input data or to video coded data
    • 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]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Television Systems (AREA)
  • Color Television Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

En un codificador de señal de televisión de alta definición, los datos digitales de alta prioridad (5) y de prioridad normal (11), son separados (16,18) a componentes de cuadratura I y Q, se forman espectralmente mediante división de tiempo (32,34), para producir señales moduladas en amplitud, de cuadratura, respectivas, del tipo 32-QAM. La señal QAM de alta prioridad y la señal QAM de prioridad normal exhiben diferentes anchuras de banda y frecuencias de portadora. Las señales QAM de alta prioridad y de prioridad normal se combinan (40) en forma digital 32-QAM doble, con prioridades, antes de ser transportada a un solo convertidor de digital a analógico (50) y al conmutador de las redes (52,55) de transmisión de radio frecuencias analógicas.
MX9305537A 1992-09-10 1993-09-09 CODIFICADOR DE SEñAL DE TELEVISION DIGITAL QAM MULTIPLE. MX9305537A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB929219185A GB9219185D0 (en) 1992-09-10 1992-09-10 A single digital modem encoder to generate a twin qam signal for advanced digital television (adtv)
US07/991,625 US5313279A (en) 1992-09-10 1992-12-16 Digital carrier combining apparatus in a multiple QAM digital television signal receiver

Publications (1)

Publication Number Publication Date
MX9305537A true MX9305537A (es) 1994-07-29

Family

ID=26301593

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9305537A MX9305537A (es) 1992-09-10 1993-09-09 CODIFICADOR DE SEñAL DE TELEVISION DIGITAL QAM MULTIPLE.

Country Status (6)

Country Link
EP (1) EP0588542B1 (es)
JP (1) JP3614451B2 (es)
CN (1) CN1048134C (es)
DE (1) DE69323944T2 (es)
MX (1) MX9305537A (es)
SG (1) SG95572A1 (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0775099A (ja) * 1993-05-07 1995-03-17 Philips Electron Nv マルチプレックス直交振幅変調テレビジョン送信用送信方式、送信機及び受信機
US6456607B2 (en) * 1996-10-16 2002-09-24 Canon Kabushiki Kaisha Apparatus and method for transmitting an image signal modulated with a spreading code
US5900915A (en) * 1997-03-18 1999-05-04 Thomson Consumer Electronics, Inc. HD to SD guide converter for electronic television schedule system
DE19962760A1 (de) 1999-12-23 2001-06-28 Rohde & Schwarz Anordnung zum Erzeugen eines analogen I/Q-Signals aus zwei oder mehreren Datenströmen
KR100454483B1 (ko) 2002-03-04 2004-10-28 삼성전자주식회사 아이/큐 복조장치 및 그의 아이/큐 신호생성방법
CN103179079B (zh) * 2011-12-21 2017-08-25 北京普源精电科技有限公司 正交幅度调制信号的产生方法、装置和数字信号发生器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134464A (en) * 1990-11-16 1992-07-28 North American Philips Corporation Method and apparatus for the transmission and reception of a multicarrier digital television signal
US5287180A (en) * 1991-02-04 1994-02-15 General Electric Company Modulator/demodulater for compatible high definition television system
US5111292A (en) * 1991-02-27 1992-05-05 General Electric Company Priority selection apparatus as for a video signal processor

Also Published As

Publication number Publication date
SG95572A1 (en) 2003-04-23
DE69323944T2 (de) 1999-07-29
DE69323944D1 (de) 1999-04-22
CN1048134C (zh) 2000-01-05
JP3614451B2 (ja) 2005-01-26
CN1090114A (zh) 1994-07-27
JPH06225342A (ja) 1994-08-12
EP0588542A3 (en) 1994-11-30
EP0588542B1 (en) 1999-03-17
EP0588542A2 (en) 1994-03-23

Similar Documents

Publication Publication Date Title
CA2103980A1 (en) Single digital modem encoder to generate a twin qam signal for advanced digital television (adtv)
GB859002A (en) Improvements in or relating to phase modulators for carrier communication systems
ES2049029T3 (es) Modulador de fm.
JPS54127266A (en) Amplitude modulation synchronous digital signal carrier regenerative circuit
MX9305537A (es) CODIFICADOR DE SEñAL DE TELEVISION DIGITAL QAM MULTIPLE.
GB1490531A (en) Digital attenuators
DE69015946T2 (de) Analog-Digitalwandler von hoher Umwandlungsfrequenz.
ES2049744T3 (es) Convertidor de frecuencia armonica con supresion de imagen en microondas.
AT335522B (de) Schaltungsanordnung zur ubertragung von digitalen informationen eines zeitmultiplexfernmeldenetzes
ATA324977A (de) Uebertrager zur uebertragung von gleich- und wechselstromsignalen von einem potential auf ein anderes von dem einen potential galvanisch getrenntes potential mit einem ferro- magentischen kern
FI60474C (fi) Moduleringsanordning foer bildande av ett telefoni-frekvensmultiplexsystem
EP0082652A3 (en) Mixing circuit
GB1385408A (en) Telemonitoring system
ATE131672T1 (de) Autoradio mit einer schaltungsanordnung zur analog/digital-wandlung eines zwischenfrequenzsignals
JPS52109811A (en) Amplitude phase modulation communication system
JPS5534536A (en) Digital-analog converter
ES384717A2 (es) Central telefonica automatica.
DE58909726D1 (de) Schaltungsanordnung zur Demodulation eines Hilfsträgers
GB403571A (en) Improvements in carrier current signalling systems
SU964967A1 (ru) Балансный смеситель
GB906390A (en) Improvements in and relating to electrical systems for transmission of information to a distance
JPS57152745A (en) Frequency conversion system
Flood et al. Interconnexion of frequency-division and time-division multiplex transmission systems
JPS5669943A (en) Light data way device
GB1306842A (en) System for transmitting and switching ifnormation between subs cribers

Legal Events

Date Code Title Description
FG Grant or registration
MM Annulment or lapse due to non-payment of fees