Global patent index - EP 0847648 A4

EP 0847648 A4 2001-01-24 - SYSTEM FOR TIME-VARYING SELECTION AND ARRANGEMENT OF DATA POINTS FOR PROCESSING NTSC-COMPATIBLE HDTV SIGNALS

Title (en)

SYSTEM FOR TIME-VARYING SELECTION AND ARRANGEMENT OF DATA POINTS FOR PROCESSING NTSC-COMPATIBLE HDTV SIGNALS

Title (de)

VORRICHTUNG ZUR ZEITABHÄNGIGEN AUSWAHL UND ANORDNUNG DER DATENPUNKTE ZUR VERARBEITUNG VON NTSC KOMPATIBLEN HDTV-SIGNALEN

Title (fr)

SYSTEME DE SELECTION VARIABLE DANS LE TEMPS ET AGENCEMENT DE POINTS DE DONNEES SERVANT A TRAITER DES SIGNAUX HDTV COMPATIBLES AVEC LA NORME NTSC

Publication

EP 0847648 A4 (EN)

Application

EP 96919297 A

Priority

  • US 9609815 W
  • US 48538595 A

Abstract (en)

[origin: WO9641474A1] Processes for selecting, manipulating and arranging data points or pixels derived from information bearing signals are useful to reduce the bandwidth of, or improve the perceived quality of, such a signal as transmitted and displayed. The techniques utilize time-varying sampling schemes and take into account the characteristics of the human visual system. For each information frame, a subset (3) of all possible data points (1) is selected (2). A further subset of active data points (5) is selected (4) for which data will actually be sampled. The active points (5) are further divided (6) into points for which a value will be transmitted (x-points) (7) and points which will be sampled but for which no separate value will be transmitted (o-points) (8). A mathematical association between the x-points and o-points is made (9) and new values to be transmitted are calculated for the x-points (10). The parameters of the selection and association processes are varied in a non-trivial manner and the, now modified, cycle repeated (11) for subsequent data frames. In particular, the techniques may be used to process a high-definition television signal prior to its storage, or transmission over a low-bandwidth channel.

IPC 1-7 (main, further and additional classification)

H04N 7/12; H04N 7/26

IPC 8 full level (invention and additional information)

H04N 7/26 (2006.01); H03M 7/30 (2006.01); H04N 7/01 (2006.01); H04N 7/12 (2006.01); H04N 7/46 (2006.01)

CPC (invention and additional information)

H04N 7/014 (2013.01); H04N 7/0125 (2013.01); H04N 7/125 (2013.01); H04N 19/59 (2014.11)

Citation (search report)

  • No further relevant documents disclosed
  • See also references of WO 9641474A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9641474 A1 19961219; AU 6166896 A 19961230; EP 0847648 A1 19980617; EP 0847648 A4 20010124; JP H11507484 A 19990629

INPADOC legal status

2004-07-07 [18D] DEEMED TO BE WITHDRAWN

- Ref Legal Event Code: 18D

- Effective date: 20031231

2001-01-24 [A4] SUPPLEMENTARY SEARCH REPORT

- Ref Legal Event Code: A4

- Effective date: 20001207

2001-01-24 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-01-24 [RIC1] CLASSIFICATION (CORRECTION)

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- Free Format Text: 7H 04N 7/12 A, 7H 04N 7/26 B

1998-06-17 [17P] REQUEST FOR EXAMINATION FILED

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- Effective date: 19980225

1998-06-17 [AK] DESIGNATED CONTRACTING STATES:

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- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

1998-06-17 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO

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- Free Format Text: LV PAYMENT 980225