Still picture transmission-display apparatus

• US 4,994,913 A
• Filed: 11/03/1989
• Issued: 02/19/1991
• Est. Priority Date: 11/08/1988
• Status: Expired due to Fees

• Current Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Original Assignee: Mitsubishi Denki Kabushiki Kaisha (Mitsubishi Electric Corporation)
• Inventors: Maeshima, Kazuya
• Primary Examiner(s): Groody, James J.
• Assistant Examiner(s): Harvey, David E.
• Application Number:
  US07/431,079
• Time in Patent Office: 473 Days
• Field of Search: 358/148, 358/147, 358/146, 358/142, 358/141, 358/133, 358/134, 358/137, 379/53, 379/100, 364/521, 364/524
• US Class Current: 348/22
• CPC Class Codes: H04N 1/00283 with a television apparatus
• CPC Class Codes: H04N 1/3333 during transmission, input or output of the picture signal; within a single document or page
• CPC Class Codes: H04N 2201/33314 of reading or reproducing mode

Abstract

A still picture transmission-display apparatus which encodes at a transmission side display timing of inputted analog still picture data so as to transmit to a receiving side the display timing code and digital still picture data obtained by digital-converting the analog still picture data and which decodes at the receiving side the display timing code so as to set parameters of the display timing at a controller, the controller, according to the parameters, controlling outputs of the still picture data and horizontal and vertical synchronizing signals to a display device. Then, still picture data of various timing can be transmitted.

Claims

1. A still picture transmission-display apparatus comprising;

an analog/digital converter for converting inputted analog still picture data of raster scanning type into digital still picture data;

a first memory for storing therein said digital still picture data converted by said analog/digital converter;

signal generating means for generating a sampling clock for said analog/digital converter and a write control signal for said first memory corresponding to said analog still picture data;

an encoder for encoding display timing of said analog still picture data so as to output a display timing code;

transmission means for transmitting to a receiving side the digital still picture data read out from said first memory and the display timing code outputted from said encoder;

a second memory for storing therein the digital still picture data transmitted by said transmission means;

a digital/analog converter for converting into analog still picture data the digital still picture data read out from said second memory;

a decoder for decoding the display timing code transmitted by said transmission means so at to generate a display timing control signal; and

a controller for setting various display timing on the basis of said display timing control signal so at to generate a read control signal for controlling read-out from said second memory, a sampling clock for said digital/analog converter, and a horizontal synchronizing signal and a vertical synchronizing signal to a display device.

2. A still picture transmission-display apparatus according to claim 1, wherein said signal generating means generates said sampling clock for said analog/digital converter corresponding to the horizontal frequency of said analog still picture data.

3. A still picture transmission-display apparatus according to claim 1, wherein said signal generating means generates said write control signal corresponding to scanning line structure of said analog still picture data.

4. A still picture transmission-display apparatus according to claim 1, wherein said encoder encodes the display timing on the basis of a horizontal synchronizing signal and a vertical synchronizing signal of said analog still picture data.

5. A still picture transmission-display apparatus according to claim 1, wherein said display timing control signal sets display parameters at said controller, said controller generating said read control signal, sampling clock horizontal synchronizing signal and vertical synchronizing signal, according to said display parameters.

6. A still picture transmission-display apparatus according to claim 1, wherein said transmission means multiplexes said digital still picture data and display timing code and transmits them to the receiving side.

7. A still picture transmission-display apparatus according to claim 6, further comprising means for separating and regenerating said digital still picture data and display timing code multiplex-transmitted by said transmission means.

8. A still picture transmission-display apparatus according to claim 1, wherein said digital/analog converter outputs said analog still picture data to the display device, said controller outputting said horizontal synchronizing signal and vertical synchronizing signal to said display device.

9. A still picture transmission-display apparatus according to claim 8, wherein said first and second memories store therein digital still picture data corresponding to one picture plane of said display device.

10. A still picture transmission-display apparatus according to claim 8, wherein said display device has a cathode ray tube.