WO1999005870A3 - Method of switching between video sequences and corresponding device - Google Patents

Method of switching between video sequences and corresponding device Download PDF

Info

Publication number
WO1999005870A3
WO1999005870A3 PCT/IB1998/000878 IB9800878W WO9905870A3 WO 1999005870 A3 WO1999005870 A3 WO 1999005870A3 IB 9800878 W IB9800878 W IB 9800878W WO 9905870 A3 WO9905870 A3 WO 9905870A3
Authority
WO
WIPO (PCT)
Prior art keywords
switching
corresponding device
video sequences
decoder buffer
streams
Prior art date
Application number
PCT/IB1998/000878
Other languages
French (fr)
Other versions
WO1999005870A2 (en
Inventor
Yann Lemaguet
Original Assignee
Koninkl Philips Electronics Nv
Philips Svenska Ab
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 Koninkl Philips Electronics Nv, Philips Svenska Ab filed Critical Koninkl Philips Electronics Nv
Priority to JP11509561A priority Critical patent/JP2001501072A/en
Priority to EP98921685A priority patent/EP0927495A4/en
Publication of WO1999005870A2 publication Critical patent/WO1999005870A2/en
Publication of WO1999005870A3 publication Critical patent/WO1999005870A3/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
    • H04N21/234—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
    • H04N21/234363—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 by altering the spatial resolution, e.g. for clients with a lower screen resolution
    • 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
    • H04N21/23406—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving management of server-side video buffer
    • 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
    • H04N21/234354—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 by altering signal-to-noise ratio parameters, e.g. requantization

Abstract

The invention relates, in encoding/decoding systems, to an improved method of switching from a first coded video sequence to a second one. In order to avoid underflow or overflow of the decoder buffer, a transcoding of the input streams IS1 and IS2 is used toshift the temporal position of the switching point and to obtain at the output of the provided transcoders (11, 12) streams TS1 and Ts2 containing an identical entry point and the same decoder buffer characteristics. Application: switching of bitstreams generated according to the MPEG-1 and MPWG-2 standards.
PCT/IB1998/000878 1997-07-22 1998-06-05 Method of switching between video sequences and corresponding device WO1999005870A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP11509561A JP2001501072A (en) 1997-07-22 1998-06-05 Switching method between video sequences and corresponding device
EP98921685A EP0927495A4 (en) 1997-07-22 1998-06-05 Method of switching between video sequences and corresponding device

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP97401764.2 1997-07-22
EP97401764 1997-07-22
US09/120,292 US6314138B1 (en) 1997-07-22 1998-07-21 Method of switching between video sequencing and corresponding device

Publications (2)

Publication Number Publication Date
WO1999005870A2 WO1999005870A2 (en) 1999-02-04
WO1999005870A3 true WO1999005870A3 (en) 1999-04-08

Family

ID=26147860

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1998/000878 WO1999005870A2 (en) 1997-07-22 1998-06-05 Method of switching between video sequences and corresponding device

Country Status (5)

Country Link
US (2) US6314138B1 (en)
EP (1) EP0927495A4 (en)
JP (1) JP2001501072A (en)
CN (1) CN1236527A (en)
WO (1) WO1999005870A2 (en)

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Also Published As

Publication number Publication date
WO1999005870A2 (en) 1999-02-04
EP0927495A2 (en) 1999-07-07
JP2001501072A (en) 2001-01-23
EP0927495A4 (en) 2001-05-30
US20010019585A1 (en) 2001-09-06
CN1236527A (en) 1999-11-24
US6314138B1 (en) 2001-11-06

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