Color slow-scan TV system and method

A color slow-scan TV system, comprising:

• first input means for accepting a composite video input signal having chrominance and luminance components indicative of a NTSC color TV picture;
• first timing means;
• video processing means connected with said first input means and with said first timing means whereby an analog signal indicative of a still color TV picture is selected from said received composite video input signal;
• first converting means for converting said analog signal to digital form and providing a digital output signal;
• first memory means connected with said first converting means and said first timing means for storing said digital output signal from said first converting means;
• slow-scan means connected with said first memory means and said first timing means for accepting said digital signals stored at said first memory means and providing therefrom a color slow-scan analog output signal;
• means adapting said color slow-scan analog signal for transmission on a transmission channel;
• second input means for accepting said color slow-scan analog signal after transmission on a transmission channel;
• second timing means;
• second converting means for converting said received color slow-scan analog signal to digital form and providing a digital output signal;
• second memory means connected with said second converting means and said second timing means for storing said digital output signal from said second converting means;
• fast-scan means connected with said second memory means and said second timing means for accepting said digital signal stored at said second timing means and reconstructing therefrom said analog signal indicative of said color TV picture;
• and
• display means for displaying said color TV picture.

In a color slow-scan TV system, a transmitter comprising:

• first signal processing means adapted to accept an encoded video input signal having chrominance and luminance components indicative of a color TV picture and digitizing the same;
• memory means connected with said first signal processing means for accepting said digitized signal therefrom;
• and
• second processing means connected with said memory means for reading out said memory means as a color slow-scan analog signal for transmission.

In a color slow-scan TV system, a receiver comprising:

• first signal processing means adapted to accept color slow-scan analog signals having chrominance and luminance components and digitizing the same;
• memory means connected with said first signal processing means for accepting digitized signals from said first signal processing means;
• and
• second signal means connected with said memory means for reading out said memory means to reconstruct said color TV picture for display.

A method for transmitting and receiving color slow-scan TV signals, said method comprising:

• accepting an encoded video signal having chrominance and luminance components indicative of a color TV picture;
• digitizing said video input signal and entering said digitized signal into a first memory;
• reading out said digitized video signal from said first memory in an orthogonal manner as a color slow-scan analog signal;
• transmitting said color slow-scan analog signal;
• receiving said color slow-scan analog signal;
• digitizing said received color slow-scan analog signal and entering said digitized signal in a second memory;
• and
• reading out said digitized signal in said second memory to reconstruct the color TV picture for display.

A method for transmitting color slow-scan TV signals, said method comprising:

• accepting an encoded video input signal having chrominance and luminance components indicative of a color TV picture;
• digitizing said video input signal and entering said digitized signal into a memory;
• reading out said digitized video signal from said memory as a color slow-scan analog signal;
• and
• transmitting said color slow-scan analog signal.

A method for receiving color slow-scan TV signals, said method comprising:

• receiving a color slow-scan analog signal having chrominance and luminance components indicative of a transmitted color TV picture;
• digitizing said received color slow-scan analog signal;
• entering said digitized information into a memory;
• and
• reading out said digitized information from said memory to reconstruct said color TV picture for display.