Method and system for providing high definition (hd) broadcasting service and ultra high definition (uhd) broadcasting service

A method of transmitting a high definition (HD) image and an ultra high definition (UHD) image, the method comprising:

• obtaining a first HD image by down-scaling an original UHD image;
• obtaining an up-scaled image by up-scaling the first HD image;
• generating a difference image between the original UHD image and the up-scaled image;
• obtaining, from the difference image, at least one of the second HD image and the UHD image corresponding to the difference image;
• encoding the first HD image;
• encoding at least one of the second HD image and the UHD image;
• generating a first transmission stream by multiplexing and synchronizing the encoded first HD image;
• generating a second transmission stream by multiplexing and synchronizing at least one of the encoded second HD image and the encoded UHD image;
• transmitting the first transmission stream via a first transmission channel;
• and
• transmitting the second transmission stream via a second transmission channel distinguished from the first transmission channel.

A method of receiving a high definition (HD) image and an ultra high definition (UHD) image, the method comprising:

• receiving a first transmission stream via a first transmission channel;
• receiving a second transmission stream via a second transmission channel distinguished from the first transmission channel;
• demultiplexing and synchronizing the first transmission stream;
• demultiplexing and synchronizing the second transmission stream;
• generating a first HD image by decoding the demultiplexed and synchronized first transmission stream;
• generating the first UHD image by decoding the demultiplexed and synchronized second transmission stream;
• generating an up-scaled image by up-scaling the first HD image;
• generating a second UHD image by combining the up-scaled image and the first UHD image;
• and
• providing the first HD image and the second HD image.

A system for transmitting a high definition (HD) image and an ultra high definition (UHD) image, the system comprising:

• a first down-scaler to obtain a first HD image by down-scaling an original UHD image;
• a second down-scaler to obtain at least one of a second HD image and a half-resolution UHD image by down-scaling the original UHD image;
• a first image encoder to encode the first HD image;
• a second image encoder to encode at least one of the second HD image and the half-resolution UHD image;
• a multiplexer to generate a first transmission stream by multiplexing and synchronizing the encoded first HD image, and generate a second transmission stream by multiplexing and synchronizing at least one of the encoded second HD image and the encoded half-resolution UHD image;
• and
• a transmitter to transmit the first transmission stream via a first transmission channel, and transmit the second transmission stream via a second transmission channel distinguished from the first transmission channel.

A system for transmitting a high definition (HD) image and an ultra high definition (UHD) image, the system comprising:

• a first down-scaler to obtain a first HD image by down-scaling an original UHD image;
• an up-scaler to obtain an up-scaled image by up-scaling the first HD image;
• a difference image generator to generate a difference image between the original UHD image and the up-scaled image;
• an image generator to obtain at least one of a second HD image and a UHD image corresponding to the difference image from the difference image;
• a first image encoder to encode the first HD image;
• a second image encoder to encode at least one of the second HD image and the UHD image;
• a multiplexer to generate a first transmission stream by multiplexing and synchronizing the encoded first HD image, and generate a second transmission stream by multiplexing and synchronizing at least one of the encoded second HD image and the encoded UHD image;
• and
• a transmitter to transmit the first transmission stream via the first transmission channel, and transmit the second transmission stream via a second transmission channel differing from the first transmission channel.

A system for receiving a high definition (HD) image and an ultra high definition (UHD) image, the system comprising:

• a receiver to receive a first transmission stream via a first transmission channel, and receive a second transmission stream via a second transmission channel distinguished from the first transmission channel;
• a demultiplexer to demultiplex and synchronize the first transmission stream, and demultiplex and synchronize the second transmission stream;
• a first image decoder to generate a first HD image by decoding the demultiplexed and synchronized first transmission stream;
• a second image decoder to generate a first UHD image by decoding the demultiplexed and synchronized second transmission stream;
• a first up-scaler to obtain an up-scaled image by up-scaling the first HD image;
• a first image generator to generate a second UHD image by combining the up-scaled image and the first UHD image;
• and
• an image provider to provide the first HD image and the second UHD image.