FI91474B - Videokoder - Google Patents

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Publication number
FI91474B
FI91474B FI892460A FI892460A FI91474B FI 91474 B FI91474 B FI 91474B FI 892460 A FI892460 A FI 892460A FI 892460 A FI892460 A FI 892460A FI 91474 B FI91474 B FI 91474B
Authority
FI
Finland
Prior art keywords
buffer
data
information
coding
word
Prior art date
Application number
FI892460A
Other languages
English (en)
Finnish (fi)
Other versions
FI892460A0 (sv
FI91474C (sv
FI892460A (sv
Inventor
David Geoffrey Morrison
Andrew Peter Heron
David Owen Beaumont
Original Assignee
British Telecomm
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 British Telecomm filed Critical British Telecomm
Publication of FI892460A0 publication Critical patent/FI892460A0/sv
Publication of FI892460A publication Critical patent/FI892460A/sv
Publication of FI91474B publication Critical patent/FI91474B/sv
Application granted granted Critical
Publication of FI91474C publication Critical patent/FI91474C/sv

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
    • H04N21/242—Synchronization processes, e.g. processing of PCR [Program Clock References]
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/132—Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
    • H04N19/146—Data rate or code amount at the encoder output
    • H04N19/152—Data rate or code amount at the encoder output by measuring the fullness of the transmission buffer
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/503—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal prediction
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • H04N19/587—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding involving temporal sub-sampling or interpolation, e.g. decimation or subsequent interpolation of pictures in a video sequence
    • 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
    • H04N19/60—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using transform coding
    • 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
    • H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
    • H04N19/102—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or selection affected or controlled by the adaptive coding
    • H04N19/13—Adaptive entropy coding, e.g. adaptive variable length coding [AVLC] or context adaptive binary arithmetic coding [CABAC]
    • 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
    • H04N19/50—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using predictive coding
    • 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
    • H04N19/90—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using coding techniques not provided for in groups H04N19/10-H04N19/85, e.g. fractals
    • H04N19/91—Entropy coding, e.g. variable length coding [VLC] or arithmetic coding

Landscapes

  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Engineering & Computer Science (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Holo Graphy (AREA)
  • Detergent Compositions (AREA)
  • Amplifiers (AREA)
  • Details Of Television Scanning (AREA)
  • Television Systems (AREA)
  • Closed-Circuit Television Systems (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Color Television Systems (AREA)

Claims (7)

1. En videokoder, som innefattar: utveckligsmedel (1 - 29) för utveckling av informationer frän en med varierande hastighet kommande videosignal; kodningsmedel (31) med varierande dimension för kodning av informationen genom användning av en kod med varierande dimension som en serie kodade ord; en buffert (30) mellan utvecklingsmedlen (1 - 29) och kodnings-medlen (31) med varierande dimensio; kännetecknad därav, att till kodern hör räknemedel (35-38) för att räkna det totala antalet av längderna hos de kodade ord, som med tillhjälp av kodningsmedlen (31) med varierande dimension pro-duceras frän buffertens (30) momentana innehäll,
2. Videokoder enligt patentkravet 1, kännetecknad därav, att till räknemedlen (35-38) hör medel (35) för att för respektive till bufferten (30) matade dataenhet bestämma läng-den hos det motsvarande kodade ordet i enlighet med kodningen med varierande dimension, ackumuleringsmedel (36) för att ackumulera de sälunda bestämda längdernas totalvärde, och sub-traktionsmedel (38) för att frän detta totalvärde subtrahera totalvärdet för de frän bufferten (30) avlästa, dataenheterna motsvarande ordlängderna.
3. Videokoder enligt patentkravet 1, kännetecknad därav, att därtill hör styrmedel (29) anordnade att i bufferten (30), tillsammans med dataenheten, lagra totalvärdet för de sälunda bestämda längderna, och frän bufferten (30) avläsa detta totalvärde, dä dataenheten avläses, medan totalvärdet som skall subtraheras medels denna anordnas i subtraktionsmedlen (38).
4. Vidokoder enligt nägot av de ovan anförda kraven, kännetecknad därav, att det sä bestämda totalvärdet för längderna medels videokodern överföres som ett tilläggsdata. 91474 17
5. Videokoder enligt nägot av de ovan anförda kraven, k ä n -netecknad därav, att de sälunda bestämda längdernas totalvärde användes för att styra utvecklingsmedlen (1-29) att variera videosignalens datahastighet.
6. Videokoder enligt nagot av de ovan anförda kraven, k ä n -netecknad därav, att därtill dessutom hör: första kodningsmedel (1-14) att för avsnitten av bildelement i bilden som skall kodas, utveckla dessa elements tillständ indi-kerande bilddata. andra kodningsmedel (25) att utveckla en tilläggsinformation angaende bildelementens avsnitt och/eller grupper av avsnitt, varvid tilläggsinformationerna innehaller information over den av de första kodningsmedlen (1-14) använda kodningens natur; första tilläggsbuffertminne (21) för lagring av bilddata; andra tilläggsbuffertminne (22) för lagring av tilläggsdata; medel för tillförsel av flaggor i det första och andra tilläggsbuf fertminnet (21,22); och medel för avläsning av data valbart antingen fran första tilläggsbuf f erten (21) eller andra tilläggsbufferten (22) för in-skrivning i bufferten (30), varvid läsmedlen reagerar för upp-trädandet av en flagga i det läsbara tilläggsbuffertminnet (21,22) för att avsluta läsning frän detta minne (21,22) och pabörja läsning fran det andra minnet (22, 21) sa att önskad bild och sekvens av tilläggsdata erhalles.
7. Videokoder, vilken inkluderar; - medel (1-19) att generera data fran en med varierande hastig-het kommande videosignal, - kodningsmedel (31) med varierande dimension för kodning av data genom användning av en kod med varierande dimension, - - buffert (30) för att astadkomma länkning med en data med konstant hastighet avgivande utgang, - styrmedel (29) för styrning av datans läsning fran bufferten (30) , 91474 18 kännetecknad därav, att bufferten (30) föregar kod-ningsmedlen (31) med varierande dimensioner och att styrmedlen (29) anordnats att fran bufferten med sadan hastighet avläsa, att den kodade datans hastighet är konstant. • · • ·
FI892460A 1987-09-23 1989-05-22 Videokoder FI91474C (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8722394 1987-09-23
GB878722394A GB8722394D0 (en) 1987-09-23 1987-09-23 Video coder
GB8800789 1988-09-23
PCT/GB1988/000789 WO1989003153A1 (en) 1987-09-23 1988-09-23 Video coder

Publications (4)

Publication Number Publication Date
FI892460A0 FI892460A0 (sv) 1989-05-22
FI892460A FI892460A (sv) 1989-05-22
FI91474B true FI91474B (sv) 1994-03-15
FI91474C FI91474C (sv) 1994-06-27

Family

ID=10624256

Family Applications (1)

Application Number Title Priority Date Filing Date
FI892460A FI91474C (sv) 1987-09-23 1989-05-22 Videokoder

Country Status (13)

Country Link
US (1) US4985766A (sv)
EP (1) EP0309280B1 (sv)
JP (1) JP2661738B2 (sv)
AT (1) ATE91837T1 (sv)
AU (1) AU637284B2 (sv)
CA (1) CA1330122C (sv)
DE (1) DE3882469T2 (sv)
DK (1) DK248289D0 (sv)
FI (1) FI91474C (sv)
GB (1) GB8722394D0 (sv)
HK (1) HK134196A (sv)
IE (1) IE61540B1 (sv)
WO (1) WO1989003153A1 (sv)

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Also Published As

Publication number Publication date
HK134196A (en) 1996-08-02
WO1989003153A1 (en) 1989-04-06
ATE91837T1 (de) 1993-08-15
AU1591992A (en) 1992-06-25
GB8722394D0 (en) 1987-10-28
EP0309280B1 (en) 1993-07-21
AU637284B2 (en) 1993-05-20
JPH02501436A (ja) 1990-05-17
DK248289A (da) 1989-05-22
DE3882469D1 (de) 1993-08-26
DE3882469T2 (de) 1993-11-11
JP2661738B2 (ja) 1997-10-08
FI892460A0 (sv) 1989-05-22
IE61540B1 (en) 1994-11-16
FI91474C (sv) 1994-06-27
DK248289D0 (da) 1989-05-22
EP0309280A1 (en) 1989-03-29
IE882887L (en) 1989-03-23
US4985766A (en) 1991-01-15
CA1330122C (en) 1994-06-07
FI892460A (sv) 1989-05-22

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