WO2002025952A3 - Regeneration of program clock reference data for mpeg transport streams - Google Patents

Regeneration of program clock reference data for mpeg transport streams Download PDF

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Publication number
WO2002025952A3
WO2002025952A3 PCT/US2001/027191 US0127191W WO0225952A3 WO 2002025952 A3 WO2002025952 A3 WO 2002025952A3 US 0127191 W US0127191 W US 0127191W WO 0225952 A3 WO0225952 A3 WO 0225952A3
Authority
WO
WIPO (PCT)
Prior art keywords
transcoder
timing data
clock
packets
offset
Prior art date
Application number
PCT/US2001/027191
Other languages
French (fr)
Other versions
WO2002025952A2 (en
Inventor
Robert S Nemiroff
Vincent Liu
Siu-Wai Wu
Original Assignee
Gen Instrument Corp
Robert S Nemiroff
Vincent Liu
Siu-Wai Wu
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 Gen Instrument Corp, Robert S Nemiroff, Vincent Liu, Siu-Wai Wu filed Critical Gen Instrument Corp
Priority to MXPA03002418A priority Critical patent/MXPA03002418A/en
Priority to CA2421788A priority patent/CA2421788C/en
Priority to AT01966481T priority patent/ATE279073T1/en
Priority to KR10-2003-7004129A priority patent/KR20030061808A/en
Priority to EP01966481A priority patent/EP1323312B1/en
Priority to AU8699001A priority patent/AU8699001A/en
Priority to DE60106286T priority patent/DE60106286T2/en
Publication of WO2002025952A2 publication Critical patent/WO2002025952A2/en
Publication of WO2002025952A3 publication Critical patent/WO2002025952A3/en

Links

Classifications

    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/2365—Multiplexing of several video streams
    • 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
    • H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
    • H04N21/23608—Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
    • 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
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]

Abstract

A system for providing an accurate time reference for multiple input and output digital video signals of a transcoder (100) that is particularly suited for use with MPEG data. The multiple streams are synchronized with a single master system time clock (155) at the transcoder (100). Timing data from the master clock is compared to timing data from packets that are input to the transcoder to determine an offset (120, 130). In particular, timing data, such as a program clock reference (PCR) field, is recovered from packets (104) of different channels that are input to the transcoder (122, 132). For each channel, timing data is then provided for packets (106) that are output from the transcoder based on the offset and timing data of the master clock (155) at the respective output times. In particular, the adjusted timing data is determined as a sum of the offset and an associated hardware error, less a delay (PcrSysDla) associated with the transcoder, which includes a lookahead delay and a buffer delay. The associated hardware error represents an error of the master clock and/or a system time clock of an encoder that encoded the particular channel.
PCT/US2001/027191 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams WO2002025952A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
MXPA03002418A MXPA03002418A (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams.
CA2421788A CA2421788C (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams
AT01966481T ATE279073T1 (en) 2000-09-22 2001-08-31 TIMEBASE REFERENCE DATE REGENERATION FOR MPEG TRANSPORT STREAMS
KR10-2003-7004129A KR20030061808A (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams
EP01966481A EP1323312B1 (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams
AU8699001A AU8699001A (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams
DE60106286T DE60106286T2 (en) 2000-09-22 2001-08-31 TIME BASIC REFERENCE DATE REGENERATION FOR MPEG TRANSPORT TREES

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/667,734 2000-09-22
US09/667,734 US6724825B1 (en) 2000-09-22 2000-09-22 Regeneration of program clock reference data for MPEG transport streams

Publications (2)

Publication Number Publication Date
WO2002025952A2 WO2002025952A2 (en) 2002-03-28
WO2002025952A3 true WO2002025952A3 (en) 2002-07-04

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/027191 WO2002025952A2 (en) 2000-09-22 2001-08-31 Regeneration of program clock reference data for mpeg transport streams

Country Status (11)

Country Link
US (1) US6724825B1 (en)
EP (1) EP1323312B1 (en)
KR (1) KR20030061808A (en)
CN (1) CN1212737C (en)
AT (1) ATE279073T1 (en)
AU (1) AU8699001A (en)
CA (1) CA2421788C (en)
DE (1) DE60106286T2 (en)
MX (1) MXPA03002418A (en)
TW (1) TW533739B (en)
WO (1) WO2002025952A2 (en)

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US20060095940A1 (en) * 2004-11-03 2006-05-04 Yearwood Bradley N Method and apparatus for distributing digital stream data to a user terminal
US7649874B2 (en) 2005-03-10 2010-01-19 Qualcomm Incorporated Methods and apparatus for providing power efficient time management for mobile media
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US8068541B2 (en) * 2006-01-30 2011-11-29 Jan Harding Thomsen Systems and methods for transcoding bit streams
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US7702056B2 (en) 2006-10-26 2010-04-20 Toshiba America Electronic Components, Inc. Time base corrector
JP4607856B2 (en) * 2006-12-26 2011-01-05 富士通株式会社 Encoding / decoding system and encoding / decoding method
US20080205389A1 (en) * 2007-02-26 2008-08-28 Microsoft Corporation Selection of transrate and transcode processes by host computer
US8165199B2 (en) * 2007-10-18 2012-04-24 Texas Instruments Incorporated Method and apparatus for on-chip voltage controlled oscillator function
US20100278236A1 (en) * 2008-01-17 2010-11-04 Hua Yang Reduced video flicker
CN101247527B (en) * 2008-03-21 2010-04-21 华为技术有限公司 Clock recovery method and device
JP2009290768A (en) * 2008-05-30 2009-12-10 Toshiba Corp Video processing apparatus and video processing method
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Also Published As

Publication number Publication date
WO2002025952A2 (en) 2002-03-28
CN1476726A (en) 2004-02-18
EP1323312B1 (en) 2004-10-06
DE60106286T2 (en) 2005-10-13
MXPA03002418A (en) 2004-02-12
DE60106286D1 (en) 2004-11-11
CN1212737C (en) 2005-07-27
EP1323312A2 (en) 2003-07-02
KR20030061808A (en) 2003-07-22
TW533739B (en) 2003-05-21
AU8699001A (en) 2002-04-02
ATE279073T1 (en) 2004-10-15
US6724825B1 (en) 2004-04-20
CA2421788C (en) 2011-05-03
CA2421788A1 (en) 2002-03-28

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