Data transmission method, apparatus using same, and data transmission system

A data transmission method for transmitting at least image data, comprising the steps of:

• capturing an image including a target image to be transmitted;
• making adjustments so that the target image to be transmitted from the captured image has a preset size;
• and
• compressing and transmitting the adjusted image data in the image frame.

A data transmission apparatus for transmitting at least image data accommodated in an image frame of a preset size, comprising

• an imaging means for capturing an image including a target image to be transmitted;
• a first circuit for making adjustments so that the target image to be transmitted from the captured image by the imaging means substantially fully fills the image frame;
• and
• a second circuit for compressing and transmitting the adjusted image data in the image frame.

A data transmission apparatus for transmitting at least image data, comprising

• an imaging means for capturing an image including a target image to be transmitted;
• a first circuit for making adjustments so that the target image to be transmitted from the captured image has a preset size;
• and
• a second circuit for compressing and transmitting the adjusted image data in the image frame.

A data transmission system for displaying at least image data of a user on a display screen among a plurality of terminals and transmitting at least image data while displaying received image data of another party on the display screen, wherein a terminal comprises

• an imaging means for capturing an image including a target image to be transmitted;
• a first circuit for making adjustments so that the target image to be transmitted from the captured image by the imaging means substantially fully fills an image frame;
• and
• a second circuit for compressing and transmitting the adjusted image data in the image frame.

A data transmission system for displaying at least image data of a user on a display screen among a plurality of terminals and transmitting at least image data while displaying received image data of another party on the display screen, wherein a terminal comprises

• an imaging means for capturing an image including a target image to be transmitted;
• a first circuit for making adjustments so that the target image to be transmitted from the captured image becomes a preset size;
• and
• a second circuit for compressing and transmitting the adjusted image data in an image frame.