Video telephone

Details Video telephone Video telephone

H - Electricity

04

N

379/4

H04N 1/41 (2006.01) H04N 7/01 (2006.01) H04N 7/12 (2006.01) H04N 7/14 (2006.01) H04N 7/24 (2006.01) H04N 7/26 (2006.01)

Patent

CA 1288183

ABSTRACT OF THE DISCLOSURE A video telephone for transmitting video data of a still picture through an audio signal line includes an image pick- up tube for picking up a picture of the still picture, an A/D (analog-to-digital) converter for converting the analog output picked up by the image pick-up tube to the form of a digital signal, a memory for storing the output of the A/D converter as video data, a modulating circuit for modulating the video data stored in the memory into a modulated signal of an occupied frequency band corresponding to a transmission band of the signal line, a circuit for transmitting the modulated output of the modulating circuit to the signal line, a circuit for generating a synchronizing pulse and a frequency-dividing circuit for frequency- dividing the color subcarrier signal to provide signals necessary for the A/D converter, the memory, and the modulating circuit, wherein the video data is a signal which results from thinning the picked-up output at a predetermined ratio.

570404

Affiliated with

Also associated with

Rating

Video telephone does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Video telephone, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Video telephone will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1235273