Controller for providing timing signals for video data

Details Controller for providing timing signals for video data Controller for providing timing signals for video data

1997-02-25

1998-08-25

Burgess, Glenton B.

Television

Combined with diverse art device

348510, 348521, 348458, H04N 701

Patent

active

057987998

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to technology concerned with displaying video data on a TV screen.


BACKGROUND OF THE INVENTION

Video data generated by a computer is displayed on a computer monitor and is specifically formatted for such display.
Because the video data generated by a computer is in a format which is not compatible with the electronics of a TV it is not possible to display video data generated by computer (for instance a VGA video controller) on a TV screen.
Devices which have been developed to overcome this problem receive video data from the computer and typically capture a complete frame, score it in memory and redisplay the information via a composite signal. In its normal capacity a TV receives video data through an RF input, the data is fed to an RF tuner and from there to a decoder which demodulates the video data and converts it to a form which is receivable by the TV screen driver. The video data which is sent to the decoder from the tuner is in a preconfigured format which is compatible with the TV. Because the decoder formats all the received information so that it can be displayed on the TV screen video data from a computer source is processed so that it is in a digitised form which can be interpreted by the TV decoder.
Because of the amount of processing required of the computer generated video signals, it has not been possible to produce a picture of sufficient quality when it is ultimately displayed on a TV screen. In addition to this because there are three types of TV being used throughout the world, these being the NTSC, PAL and SECAM systems, the problem of producing a device that interfaces a computer and TV screen is further compounded.
Because of the cost involved with finding a device which will interface a computer with a TV screen, t has been considered more feasible to display TV video data on a computer monitor rather than the other way around.
The present invention provides an alternative method of interfacing uniquely formatted computer generated video data with a TV screen.


SUMMARY OF THE INVENTION

According to one aspect of the present there is provided a controller for synchronising video signals for display on a TV screen comprising:
a horizontal input storage means for receiving a horizontal synchronising signal of a first sequence for computer generated image data;
a vertical input storage means for receiving a vertical synchronising signal of a second sequence for computer generated image data;
a first processor means for generating horizontal synchronising signals of a third sequence and a vertical synchronising signals of a fourth sequence;
and a second processing means for combining the horizontal synchronising signal of the first sequence and the horizontal synchronising of the third sequence to generate a horizontal synchronising signal of a fifth sequence and for combining the vertical synchronising signal of the second sequence with the vertical synchronising signal of the fourth sequence to generate a vertical synchronising signal of a sixth sequence;
wherein the horizontal synchronising signal of the fifth sequence and the vertical synchronising signal of the sixth sequence generated by the second processor means are arranged to provide timing sequences for image data generated by a computer whereby the image data can be displayed on a TV screen.
According to another aspect of the present invention there is provided a method of synchronising image data for display on a TV screen, the method comprising the steps of receiving a horizontal synchronising signal of a first sequence associated wish computer generated image data receiving a vertical synchronising second sequence associated with the computer generated image data using a first processor means to generate horizontal synchronising signals of a third sequence and vertical synchronising signals of a fourth sequence using a second processor means for combining the horizontal synchronising signal of the first sequence and the horizontal synchronising signal of the thir

REFERENCES:
patent: 3898377 (1975-08-01), Fairbairn et al.
patent: 4495595 (1985-01-01), Nakayashiki
patent: 4554582 (1985-11-01), Wine
patent: 4670785 (1987-06-01), Medin
patent: 5486668 (1996-01-01), Shyu et al.
patent: 5526055 (1996-06-01), Zhang et al.
patent: 5712688 (1998-01-01), Eglit

Affiliated with

Also associated with

Rating

Controller for providing timing signals for video data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Controller for providing timing signals for video data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Controller for providing timing signals for video data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-39474