Computer graphics processing and selective visual display system – Display driving control circuitry – Controlling the condition of display elements
Patent
1996-05-13
1999-08-17
Brier, Jeffery
Computer graphics processing and selective visual display system
Display driving control circuitry
Controlling the condition of display elements
348482, G06F 1314, H04N 708
Patent
active
059400706
ABSTRACT:
A data transmission apparatus for transmitting an audio signal through a video signal cable for a computer system including a monitor having a sound speaker. The computer system includes an audio generating device for generating an audio signal; a video generating device for generating a video signal and synchronization signals, a first audio buffer for temporary retaining the audio signal and outputting the audio signal during a blanking interval of the video signal in accordance with the synchronization signals; and a multiplexer for multiplexing the audio signal with the video signal by inserting the audio signal into the blanking interval of the video signal and for generating a multiplexed signal. A video signal cable is connected between the computer system and the monitor for transmitting the multiplexed signal from the computer system to the monitor. The monitor includes a demultiplexer connected to the video signal cable, for demultiplexing the multiplexed signal received from the video signal cable by separating the audio signal and the video signal from the multiplexed signal in accordance with a control signal and for generating a separated audio signal and a separated video signal; a second audio buffer for temporarily retaining the separated audio signal and outputting the separated audio signal to the sound speaker for sound production in accordance with the control signal and the synchronization signals; and a video display for simultaneously enabling a visual display of the separated video signal on a screen in accordance with the synchronization signals. The data transmission apparatus constructed according the principles of the present invention seeks to advantageously transmit the audio signal to the monitor for sound reproduction without requiring a separable audio cable.
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Bell Paul A.
Brier Jeffery
Bushnell Esq. Robert E.
Samsung Electronics Co,. Ltd.
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