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1. WO2003025914 - TRAITEMENT DE PISTES SONORES DE FILM A ZONE VARIABLE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

What is claimed is
Claim 1. A method for playback of film with an analog optical sound track, comprising the steps of:
a) forming an image of only said analog optical sound track;
b) storing said image;
c) representing part of said stored image as a spatial image;
d) processing said spatial image to form a median value;
e) converting said median value of said spatial image to a signal representative of an audio signal represented in said sound track.

Claim 2. The method of claim 1 including the additional step of:
repeating steps of c) and d) to form median values for all of said image of said analog optical sound track.

Claim 3. The method of claim 2, wherein said forming step comprises scanning the width of only said analog optical sound track.

Claim 4. The method of claim 3, comprises repeating said scanning step for a duration of said playback.

Claim 5. The method of claim 4, wherein said forming step comprises digitizing said image of said analog optical sound track.

Claim 6. The method of claim 5, wherein said representing step comprises grouping said stored image data from successive scans to form said spatial image.

Claim 7. The method of claim 2, wherein said converting step comprises separating said median values for all of said image of said analog optical sound track into a first group of values representing said analog optical sound track and audio modulation, and a second group of values representing said analog optical sound track excluding said audio modulation.

Claim 8. The method of claim 7, wherein said separating step comprises, forming a digital audio value from said first group of values to represent only audio modulation contained in said analog optical sound track.

Claim 9. The method of claim 2, wherein said converting step comprises, sorting said median values for all of said image of said analog optical sound track to form only two groups in accordance with said median values having one of a value representing said sound track with audio modulation and a value representing said sound track without audio modulation.

Claim 10. The method of claim 1 , wherein said step representing part of said stored image comprises forming said spatial image with a specific shape to favor a specific orientation median value formation.