Method and apparatus for encoding data within the subcode channel of a compact disc or laser disc
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United States of America Patent
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Feb 12, 1991
Grant Date -
N/A
app pub date -
Dec 20, 1988
filing date -
Dec 20, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for encoding graphical data on an audio compact disc or laser vision disc without affecting the digitized sound stored in the main audio channel by utilizing what is known as the subcode channel of the compact or laser disc. The subcode channel is reserved for information other than digitized compact or laser disc audio data. Multiple active areas are created on each screen or picture displayed, with each active are being synchronized with the information in the main channel by creating multiple bands in the subcode channel which can be simultaneously displayed and loading graphics and/or lyrics data which is to be displayed in the various bands.
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