DK166597B1 - Fremgangsmaade til optegnelse og/eller gengivelse af kodede signaler - Google Patents

Fremgangsmaade til optegnelse og/eller gengivelse af kodede signaler Download PDF

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Publication number
DK166597B1
DK166597B1 DK269786A DK269786A DK166597B1 DK 166597 B1 DK166597 B1 DK 166597B1 DK 269786 A DK269786 A DK 269786A DK 269786 A DK269786 A DK 269786A DK 166597 B1 DK166597 B1 DK 166597B1
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DK
Denmark
Prior art keywords
image
intraframe
images
recording
block length
Prior art date
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DK269786A
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English (en)
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DK269786D0 (da
DK269786A (da
Inventor
Guenter Oberjatzas
Heinz-Werner Keesen
Jean-Yves Catros
Christian Jacques Richard
Original Assignee
Telefunken Fernseh & Rundfunk
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Application filed by Telefunken Fernseh & Rundfunk filed Critical Telefunken Fernseh & Rundfunk
Publication of DK269786D0 publication Critical patent/DK269786D0/da
Publication of DK269786A publication Critical patent/DK269786A/da
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Publication of DK166597B1 publication Critical patent/DK166597B1/da

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/926—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation
    • H04N5/9261—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation involving data reduction
    • H04N5/9262—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by pulse code modulation involving data reduction using predictive coding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/036—Insert-editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/032—Electronic editing of digitised analogue information signals, e.g. audio or video signals on tapes

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Description

DK 166597 B1
Opfindelsen angår en fremgangsmåde til optegnelse og/eller gengivelse af digitalt kodede signaler, navnlig digitale videosignaler på vilkårlige lagermedier, med en datahastighed, der er reduceret i forhold til den data-5 hastighed, der faktisk er nødvendig til gengivelse af et billede, og som bl.a. opnås ved interframe- og intra-frame-kodning, jfr. f.eks. JP-A-57166785, Patents Abstracts of Japan, Vol.7, nr.8 (E-152) (1153), 13.1.1983.
Til optegnelse af digitale farvebilleder, der in-10 deholder ca. 216 Mbit/s rådata, er det for en smalbåndet kanal, som den f.eks. udgøres af en videorecorder, nødvendigt at reducere de data, der skal optegnes. Til datareduktion kendes bl.a. følgende fremgangsmåder.
1. Intraframekodede billeder. Her reduceres et bil- 15 ledes indhold på den måde, at den information, der skal overføres, reduceres for redundante og/eller irrelevante andele.
2. Interframekodede billeder. Ved denne kodning optegnes kun forskellene mellem efter hinanden 20 følgende billeder.
Ulempen ved den intraframekodede optegnelse ligger i, at billedkvaliteten ved en fordret datahastighed, som skal optegnes, på 10-15 Mbit/s er meget dårlig. Der optegnes mindre end 10 % af informationen.
25 Ulempen ved den interframekodede optegnelse lig ger i, at det ikke er muligt at begynde med gengivelsen et vilkårligt sted i optegnelsen, fordi informationen kun er relativ. Udgangsbilledet mangler.
Opfindelsen har til opgave at angive en optegnel-30 sesfremgangsmåde, som forener datareduktionsfordelene ved intraframe- og interframe-kodning, og som samtidigt gør det muligt at foretage hurtige søgninger samt in-sert-snit.
Denne opgave løses med de i krav 1 angivne foran-35 staltninger. Fordelagtige videreudviklinger af opfindelsen er angivet i underkravene.

Claims (4)

1. Fremgangsmåde til optegnelse og/eller gengivelse af digitalt kodede signaler, navnlig digitale videosignaler på magnetbånd med en datahastighed, der er 35 reduceret i forhold til den faktisk nødvendige datahastighed til gengivelse af et billede, og som blandt andet ΐ>Κ 166597 B1 3 opnås ved* interframe- og intraframe-kodning, kendetegnet ved, at begyndelsen af en billedsekvens (23) bestemmes ved et intraframe-kodet billede (1) med fast eller variabel bloklængde, og at der dertil slutter 5 sig et antal interframe-kodede billeder (2-10) med et fast antal billeder og variabel bloklængde eller et variabelt antal billeder og fast bloklængde.
2. Fremgangsmåde ifølge krav 1, kendetegne t ved, at begyndelsen af en billedsekvens (23) in- 10 dikeres ved en intraframe-identifikation (S).
3. Fremgangsmåde ifølge krav 6, kendetegnet ved, at intraframe-identifikationen (S) er optegnet i et eget spor.
4. Fremgangsmåde ifølge krav 1, kendeteg-15 net ved, at hvert billede (1-10) i begyndelsen udviser et billedsynkroniseringssignal (12-21).
DK269786A 1984-10-10 1986-06-09 Fremgangsmaade til optegnelse og/eller gengivelse af kodede signaler DK166597B1 (da)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19843437182 DE3437182A1 (de) 1984-10-10 1984-10-10 Verfahren zur aufzeichnung und/oder wiedergabe digital kodierter signale
DE3437182 1984-10-10
EP8500505 1985-10-01
PCT/EP1985/000505 WO1986002516A1 (en) 1984-10-10 1985-10-01 Process for recording and/or reproduction of digitally coded signals

Publications (3)

Publication Number Publication Date
DK269786D0 DK269786D0 (da) 1986-06-09
DK269786A DK269786A (da) 1986-06-09
DK166597B1 true DK166597B1 (da) 1993-06-14

Family

ID=6247574

Family Applications (1)

Application Number Title Priority Date Filing Date
DK269786A DK166597B1 (da) 1984-10-10 1986-06-09 Fremgangsmaade til optegnelse og/eller gengivelse af kodede signaler

Country Status (10)

Country Link
US (1) US4969055A (da)
EP (1) EP0197126B1 (da)
JP (1) JP2545357B2 (da)
AU (1) AU4966085A (da)
CA (1) CA1285064C (da)
DE (2) DE3437182A1 (da)
DK (1) DK166597B1 (da)
FI (1) FI82166C (da)
SG (1) SG101690G (da)
WO (1) WO1986002516A1 (da)

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Also Published As

Publication number Publication date
WO1986002516A1 (en) 1986-04-24
CA1285064C (en) 1991-06-18
EP0197126B1 (de) 1989-09-06
FI82166B (fi) 1990-09-28
FI862438A0 (fi) 1986-06-06
DE3437182A1 (de) 1986-04-10
DK269786D0 (da) 1986-06-09
FI862438A (fi) 1986-06-06
EP0197126A1 (de) 1986-10-15
DK269786A (da) 1986-06-09
US4969055A (en) 1990-11-06
DE3572907D1 (en) 1989-10-12
JPS62500417A (ja) 1987-02-19
FI82166C (fi) 1991-01-10
JP2545357B2 (ja) 1996-10-16
SG101690G (en) 1991-02-14
AU4966085A (en) 1986-05-02

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B1 Patent granted (law 1993)
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