Device and method for reproducing photographic sound recordings
AssigneeThomson Licensing
InventorsDieter Poetsch, Detlef Richter, Jochen Huegel
Life of this patent
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Abstract
For a reproduction of optical sound information in a double variable-area track (DZ) an optoelectronic converter device (1, 2, 4, 9 to 13) scans the optical sound track (3) of a film (4). The converter device (1, 2, 4, 9 to 13) generates a digital image signal for buffer storage in the memory (19) of a program-controlled data processing device (15). The data processing device (15) derives the profile of the two edges of the double variable-area track (DZ) from data values of the buffer-stored image signal. Audio data for a sound reproduction are generated using data about the edge profile determined.
Claims18
Apparatus for the reproduction of optical sound recordings, which has an optoelectronic converter device (1, 2, 4, 9 to 13) for the optical scanning of an optical sound track (3), which outputs a digital image signal of the scanned optical sound track (3) at an output, and which contains a device (19) for buffer-storing the image signal output by the converter device (1, 2, 4, 9 to 13), characterized by a device (15) for the program-controlled data processing of the buffer-stored image signal, which firstly determines the profile of edges of a variable-area track from data values of the image signal and which then generates audio data for a sound reproduction from data of the edge profile determined.
Method for the reproduction of optical sound recordings,
- in which a digital image signal is generated by scanning an optical sound track,
- in which data of the image signal generated are buffer-stored,
- in which an edge profile of a variable-area track recorded on the optical sound track is determined in a manner dependent on values of the buffer-stored data, and
- in which corresponding audio data for a sound reproduction are derived in a manner dependent on the edge profile determined.
Dependencies are inferred from the claim text.