EP0174099A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Fiber optic terminal interface
Assignee: Texas Instruments Inc
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Filing: 1985-08-05
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Granted: —
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Expires: 2005-08-05
Abstract
Abstract The present invention is a communications link between a data processing apparatus and a user input/output terminal. In the data processing apparatus (120) a data transmitter multiplexes monochrone digital video data (211) with Manchester encoded ancillary data such as keyboard control data (212) and sound synthesis data (213) for tranmission via a first communications link (122). The Manchester encoded data has a clock rate tied to the video dot rate of the digital video data and is transmitted during the horizontal retrace interval. The receiver (230) in the terminal (130) uses the self clocking nature of the Manchester encoded data for clock detection, demultiplexing and synchronization. This receiver (230) then generates video data (231), keyboard control data (232) and sound synthesis data (233) for utilization and a clock signal (235) for controlling return data. A data transmitter (240) in the terminal (130) receives keyboard input data (241), mouse input data (242) and speech input data (243) for encoding in conjunction with the clock signal (235) and transmission to the data processing apparatus (120) via a second communications link (126). A second receiver (220) is connected to the second communications link (126) and generates demodulated keyboard input data (221), mouse input data (222) and speech input data (223). In the preferred embodiment the two communications links (122, 126) comprise optic fibers.
Inventors
- 👤 Keith E. Diefendorff
- 👤 Robert O. Grohman
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 08:09
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/22; G; G06; G06F; G06F3/00; G06F3/14; G06F3/153
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
22 words
A video display device communications interface comprising: a) a communications link for transmitting communications signals; b) a video display generating device including;
Claim 2
Dependent Claim
22 words
A video display device communications interface comprising: a) a communications link for transmitting communications signals; b) a video display generating device including;
Claim 3
Dependent Claim
18 words
1) a video data encoder for generating a digital video signal having a plurality of video scan lines;
Claim 4
Dependent Claim
18 words
1) a video data encoder for generating a digital video signal having a plurality of video scan lines;
Claim 5
Dependent Claim
26 words
2) a control data encoder for generating a digital control signal having self-clocking control data which has a lower data rate than said digital video signal;
Claim 6
Dependent Claim
26 words
2) a control data encoder for generating a digital control signal having self-clocking control data which has a lower data rate than said digital video signal;
Claim 7
Dependent Claim
53 words
3) a multiplexing means connected to said video da encoder and said control data encoder for time division multiplexing said digital video signal and said digital cont signal whereby said digital control signal is generated durirg the retrace intervals of video scan lines of said digital vies signal thereby forming a multiplexed signal;
Claim 8
Dependent Claim
53 words
3) a multiplexing means connected to said video da encoder and said control data encoder for time division multiplexing said digital video signal and said digital cont signal whereby said digital control signal is generated durirg the retrace intervals of video scan lines of said digital vies signal thereby forming a multiplexed signal;
Claim 9
Dependent Claim
145 words
4) a transmitting means connected to said communications link and said multiplexing means for generating communicatiors signals on said communications link corresponding to said multiplexed signal; c) a video display device including: 1) a receiving means connected to said communicatiers link for receiving said communications signals; 2) a demultiplexing means connected to said receiving means for demultiplexing said communications signals into said digital video signal and said digital control signal having a self-clocking detection means for detecting said self-clocking of said digital control data thereby enabling detection of said control data, and a timed gating means connected to said self-clocking detecting means for enabling the operation of said self-clocking detecting means only during a time interval during which the retrace interval is expected; 3) a video display means connected to said demultiplexing means for generating a visually perceivable display corresponding to said digital-video signal; and
Claim 10
Dependent Claim
145 words
4) a transmitting means connected to said communications link and said multiplexing means for generating communicatiors signals on said communications link corresponding to said multiplexed signal; c) a video display device including: 1) a receiving means connected to said communicatiers link for receiving said communications signals; 2) a demultiplexing means connected to said receiving means for demultiplexing said communications signals into said digital video signal and said digital control signal having a self-clocking detection means for detecting said self-clocking of said digital control data thereby enabling detection of said control data, and a timed gating means connected to said self-clocking detecting means for enabling the operation of said self-clocking detecting means only during a time interval during which the retrace interval is expected; 3) a video display means connected to said demultiplexing means for generating a visually perceivable display corresponding to said digital-video signal; and
Claim 11
Dependent Claim
17 words
4) a utilization device connected to said demultiplexing means for receiving and using said digital control data.
Claim 12
Dependent Claim
17 words
4) a utilization device connected to said demultiplexing means for receiving and using said digital control data.
Claim 13
Dependent Claim
80 words
A video display device communications interface as claimed in Claim 1, wherein: said control data encoder further includes means for generating a predetermined sync bit pattern indicating the end of a video scan line of said digital video signal; and said utilization device includes a sync bit pattern detection means for detecting the reception of said predetermined sync bit pattern and a horizontal reset means for beginning display of a new video line upon detection of said sync bit pattern.
Claim 14
Dependent Claim
83 words
A video display device communications interface as claimed in Claim 1, wherein: said control data encoder further includes means for generating a predetermined vertical sync bit pattern indicating the end of a video frame of said digital video signal; and said utilization device includes a vertical sync bit pattern detection means for detecting the reception of said predetermined vertical sync bit pattern and a vertical reset means for beginning display of a new video frame upon detection of said vertical sync bit pattern.
Claim 15
Dependent Claim
38 words
A video display device communications interface as claimed in Claim I, wherein: said digital control data comprises sound generation data; and said utilization device comprises a sound generation means for generating sound corresponding to said sound generation data.
Claim 16
Dependent Claim
42 words
A video display device communications interface as claimed in Claim 1, wherein: said digital control data comprises synthetic speech generation data; and said utilization device comprises a synthetic speech generating means for generating synthetic speech corresponding to said synthetic speech generation data.
Claim 17
Dependent Claim
75 words
A video display device communications interface as claimed in Claim 1, wherein: said communications link includes a fiber optic cable; said transmitting means includes an optic fiber transmitter means connected to said fiber optic cable for generating digita tight signals corresponding to multiplexed signal; said receiving means includes an optic fiber receiver connected to said fiber optic cable for generating a demodulated signal corresponding to said digital light signals transmitted by said fiber optic cable.
Claim 18
Dependent Claim
189 words
A video display device communications interface as claimed in Claim 1, wherein: said communications link includes a fiber optic cable having a first optic fiber and a second optic fiber; said transmitting means includes a first optic fiber transmitter means connected to said first optic fiber for generating digital light signals corresponding to said multiplexed signal; said video display generating means further includes: a first optic fiber receiver connected to said second optic fiber for generating an output signal corresponding to light transmitted by said second optic fiber; and a output means connected to said first optic fiber receiver for utilizing said output signal; said receiving means includes a second optic fiber receiver connected to said first optic fiber for generating a demodulated signal corresponding to said digital light signals transmitted by said optic fiber; and said video display device further includes: an input means for receiving operator inputs and generating input signals coresponding to said operator inputs; and a second fiber optic transmitter connected to said input means and said second optic fiber for generating digital light signals on said second optic fiber corresponding to said input signals.
Claim 19
Dependent Claim
17 words
An input/output unit as claimed in Claim 7, wherein: said input means comprises a manually actuatable keyboard.
Claim 20
Dependent Claim
18 words
An input/output unit as claimed in Claim 7, wherein: said input means comprises a manually actuatable pointing device.
Claim 21
Dependent Claim
19 words
An input/output unit as claimed in Claim 7, wherein: said input means comprises a vocally actuatable speech encoding device.
References Cited (Backward Citations)
No citation records indexed.
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