Digital signal transmission system with priority information forcing display of text on a receiver
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United States of America Patent
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-
Jun 2, 1998
Grant Date -
N/A
app pub date -
Feb 7, 1996
filing date -
Feb 10, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A digital signal transmission system including a transmitter and a receiver and capable of transmitting highly efficiently compressed/coded digital video signals and receiving the video signals so that the text of emergency information or the like can be displayed together with video images without once expanding/decoding the digital video signals on the transmitter side. In this system, the multiplexer of the transmitter multiplexes digital video signals and digital audio signals with a digital information signal of text which is produced and has N-level priority information added by the information stream generator, and transmits the multiplex signal to the receiver. The receiver determines whether the text of the digital information signal is to be displayed on the basis of the priority information added to the digital information signal, and when it is determined that the text are to be displayed, the receiver can display the text of the digital information signal together with the image of the digital video signal.
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