Apparatus and method for transmitting and receiving 3DTV broadcasting

1. A method for transmitting 2DTV and 3DTV broadcasting by a transmission apparatus, the method comprising:

encoding a base video using scalable video coding (SVC) or scalable high efficiency video coding (SHVC) scheme to generate a base layer stream and an enhancement layer stream, the enhancement layer stream including additional data for enhancing video quality of the base video;

encoding an additional video that configures a three-dimensional (3D) video with the base video, wherein a resolution of the additional video is lower than that of the base video;

encoding video enhancement information data for enhancing video quality of the additional video;

transmitting the base layer stream of the base video through a base layer channel and transmitting the enhancement layer stream of the base video through an enhancement layer channel; and

transmitting the encoded additional video and the encoded video enhancement information data through the base layer channel for a mobile HD (high definition) 3D service or transmitting the encoded additional video and the encoded video enhancement information data through the enhancement layer channel for a fixed UHD (ultra high definition) 3D service,

wherein the encoding of the video enhancement information data includes generating the video enhancement information data on the basis of a comparison result between the base video and the additional video.

2. The method of claim 1 , wherein:

the encoding of the base video includes:

compressing videos corresponding to a resolution lower than that of the base video to generate the base layer stream; and

compressing differential videos corresponding to different information between a video decodable from the base layer stream and the base video to generate the enhancement layer stream.

3. A method for receiving 2D TV and 3D TV broadcasting by a reception apparatus, the method comprising:

receiving a base layer stream and an enhancement layer stream through a base layer channel and an enhancement layer channel, respectively, the enhancement layer stream including additional data for enhancing video quality of a base video, the base layer stream and the enhancement layer stream being generated by encoding the base video using scalable video coding (SVC) or scalable high efficiency video coding (SHVC) scheme;

receiving data of an additional video which configures a 3D video with the base video and video enhancement information data for enhancing video quality of the additional video through the base layer channel for a mobile HD (high definition) 3D service, wherein a resolution of the additional video is lower than that of the base video;

enhancing the video quality of the additional video using the video enhancement information data; and

reproducing a two-dimensional (2D) video having relatively low-quality using the base video from the base layer stream or reproducing a three-dimensional (3D) video using the base video and the additional video of which the video quality is improved,

wherein the video enhancement information data is generated on the basis of a comparison result between the base video and the additional video.

4. The method of claim 3 , wherein, when the video enhancement information data and the data of the additional video are received through the base layer channel, the reproducing of the 3D video includes obtaining the base video by decoding the base layer stream in the case of the mobile broadcasting.

5. The method of claim 3 , wherein:

the enhancing of the video quality of the additional video includes:

converting a resolution of the additional video so as to be the same as that of the base video; and

enhancing the video quality of the additional video using the video enhancement information data.

6. An apparatus for receiving 2DTV and 3DTV broadcasting, comprising:

a base video scalable video decoder decoding a base layer stream and an enhancement layer stream received through a base layer channel and an enhancement layer channel, respectively, in scalable video decoding scheme, to obtain a base video;

first and second decoders decoding video enhancement information data and data of an additional video that are received through the enhancement layer channel, wherein the video enhancement information data is used for enhancing video quality of the additional video, and wherein the additional video configures a 3D video with the based video and has a resolution lower than that of the base video;

a video enhancer enhancing the video quality of the additional video using the video enhancement information data; and

a reproducer reproducing a 2D video having relatively high-quality using the base video from the base layer stream and the enhancement layer stream or reproducing a 3D video using the base video and the additional video of which the video quality is improved,

wherein the video enhancement information data and the data of the additional video are transmitted through the enhancement layer channel for a fixed 3D service, and

wherein the video enhancement information data is generated on the basis of a comparison result between the base video and the additional video.

7. The apparatus of claim 6 , wherein:

the video enhancer converts the resolution of the additional video so as to be the same as that of the base video, and enhances the video quality of the additional video using the video enhancement information data.