CA2122111C - Method and apparatus for adaptive clock recovery - Google Patents

Method and apparatus for adaptive clock recovery

Info

Publication number
CA2122111C
CA2122111C CA002122111A CA2122111A CA2122111C CA 2122111 C CA2122111 C CA 2122111C CA 002122111 A CA002122111 A CA 002122111A CA 2122111 A CA2122111 A CA 2122111A CA 2122111 C CA2122111 C CA 2122111C
Authority
CA
Canada
Prior art keywords
clock frequency
information
adaptive
line clock
deviation
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 - Fee Related
Application number
CA002122111A
Other languages
English (en)
French (fr)
Other versions
CA2122111A1 (en
Inventor
Robert Leroy Lien
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2122111A1 publication Critical patent/CA2122111A1/en
Application granted granted Critical
Publication of CA2122111C publication Critical patent/CA2122111C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L7/00—Arrangements for synchronising receiver with transmitter
    • H04L7/02—Speed or phase control by the received code signals, the signals containing no special synchronisation information
    • H04L7/033—Speed or phase control by the received code signals, the signals containing no special synchronisation information using the transitions of the received signal to control the phase of the synchronising-signal-generating means, e.g. using a phase-locked loop
    • 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
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
    • H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
    • H03K5/13—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals
    • H03K5/135—Arrangements having a single output and transforming input signals into pulses delivered at desired time intervals by the use of time reference signals, e.g. clock signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/02—Details
    • H04J3/06—Synchronising arrangements
    • H04J3/062—Synchronisation of signals having the same nominal but fluctuating bit rates, e.g. using buffers
    • H04J3/0632—Synchronisation of packets and cells, e.g. transmission of voice via a packet network, circuit emulation service [CES]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/643—Communication protocols
    • H04N21/64307—ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems
    • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
    • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
    • H04Q11/0478—Provisions for broadband connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/54—Store-and-forward switching systems 
    • H04L12/56—Packet switching systems
    • H04L12/5601—Transfer mode dependent, e.g. ATM
    • H04L2012/5672—Multiplexing, e.g. coding, scrambling
    • H04L2012/5674—Synchronisation, timing recovery or alignment

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
CA002122111A 1993-04-28 1994-04-25 Method and apparatus for adaptive clock recovery Expired - Fee Related CA2122111C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US054,332 1993-04-28
US08/054,332 US5396492A (en) 1993-04-28 1993-04-28 Method and apparatus for adaptive clock recovery

Publications (2)

Publication Number Publication Date
CA2122111A1 CA2122111A1 (en) 1994-10-29
CA2122111C true CA2122111C (en) 1999-06-29

Family

ID=21990332

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002122111A Expired - Fee Related CA2122111C (en) 1993-04-28 1994-04-25 Method and apparatus for adaptive clock recovery

Country Status (8)

Country Link
US (1) US5396492A (OSRAM)
EP (1) EP0622918A3 (OSRAM)
JP (1) JP2981114B2 (OSRAM)
KR (1) KR100300255B1 (OSRAM)
CN (1) CN1065090C (OSRAM)
AU (1) AU662673B2 (OSRAM)
CA (1) CA2122111C (OSRAM)
TW (1) TW253090B (OSRAM)

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Also Published As

Publication number Publication date
CN1101472A (zh) 1995-04-12
EP0622918A3 (en) 1996-04-17
TW253090B (OSRAM) 1995-08-01
JPH0746257A (ja) 1995-02-14
EP0622918A2 (en) 1994-11-02
CA2122111A1 (en) 1994-10-29
CN1065090C (zh) 2001-04-25
AU662673B2 (en) 1995-09-07
JP2981114B2 (ja) 1999-11-22
KR100300255B1 (ko) 2001-11-22
AU5520194A (en) 1994-11-03
US5396492A (en) 1995-03-07
KR940025223A (ko) 1994-11-19

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Effective date: 20090427