Video data transceiving device, and transceiving method thereof

A video data coding method using discriminative error protection for compressing video data, and discriminatively protecting the video data from errors using rate compatible punctured convolution (RCPC) coding, the method comprising the steps of:

• (a) a compressing step including the substeps of:
• (a-1) discriminating the significance of video data;
• (a-2) generating region information divided into regions according to the significance, the region information being generated without reference to syntax elements of the video data;
• and
• (a-3) compressing the video data by regions according to the region information, and
• (b) a coding step including the substeps of:
• (b-1) coding the compressed video data by regions according to the significance included in the region information using the RCPC coding;
• and
• (b-2) inserting a predetermined marker indicating that a coding rate has been changed, to the coded data.

A video data decoding method using discriminative error protection for decoding channel-coded video data which is compressed, discriminatively protected from errors using RCPC coding, and transmitted via a communications channel, the method comprising:

• (a) a decoding step;
• and
• (b) a decompressing step of decompressing video data by regions with reference to region information, wherein the region information is established based on respective significance of regions of the video data, without reference to syntax elements of the video data,
• wherein the decoding step (a) comprises the substeps of:
• (a-1) detecting a marker from the channel-coded video data;
• (a-2) extracting coding rate change information indicating that a coding rule has been changed;
• and
• (a-3) decoding video data according to a predetermined coding rule for each region.