EP 0847648 A4 20010124 - 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
Application
Priority
- US 9609815 W 19960607
- US 48538595 A 19950607
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
IPC 8 full level
H03M 7/30 (2006.01); H04N 7/01 (2006.01); H04N 7/12 (2006.01); H04N 7/26 (2006.01); H04N 7/46 (2006.01)
CPC (source: EP)
H04N 7/0125 (2013.01); H04N 7/014 (2013.01); H04N 7/125 (2013.01); H04N 19/59 (2014.11)
Citation (search report)
- No further relevant documents disclosed
- See 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
DOCDB simple family (publication)
WO 9641474 A1 19961219; AU 6166896 A 19961230; EP 0847648 A1 19980617; EP 0847648 A4 20010124; JP H11507484 A 19990629
DOCDB simple family (application)
US 9609815 W 19960607; AU 6166896 A 19960607; EP 96919297 A 19960607; JP 50202897 A 19960607