Television – Special applications – Manufacturing
Patent
1996-02-07
1998-06-02
Kostak, Victor R.
Television
Special applications
Manufacturing
348564, H04N 710
Patent
active
057608202
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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Eda Takanori
Iimuro Satoshi
Katsumata Kenji
Nagashima Toshio
Nakagawa Isao
Hitachi , Ltd.
Kostak Victor R.
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