Digital broadcasting system and data processing method
The present invention provides a method of processing data in digital broadcasting system. The method includes receiving a broadcast signal including mobile broadcast service data and main broadcast service data, wherein the mobile broadcast service data configures a RS frame, and wherein the RS frame includes at least one data packet corresponding to the mobile broadcast service data, an RS parity generated based upon the at least one data packet, and a CRC checksum generated based upon the at least one data packet and the RS parity, performing CRC-decoding and RS-decoding on the RS frame, thereby correcting errors occurred in the corresponding mobile broadcast service data, extracting video data from the mobile broadcast service data, and decoding the extracted video data, wherein the video data includes data of a base layer and data of an enhanced layer and wherein the enhanced layer has a spatial resolution or an image quality different from that of the base layer.
1. A method of processing a digital broadcast signal including mobile service data in a transmitter, the method comprising:
encoding signaling data including first signaling data and second signaling data, wherein the first signaling data includes transmission parameters for the mobile service data and the second signaling data includes cross layer information between a physical layer and an upper layer, wherein encoding the signaling data comprises:
first Reed-Solomon (RS) encoding the first signaling data at a first RS code rate,
second RS encoding the second signaling data at a second RS code rate,
interleaving the second RS encoded second signaling data, comprising:
writing the second RS encoded second signaling data row-by-row from left-to-right and top-to-bottom, and
outputting the written second signaling data by reading column by column from top-to-bottom and left-to-right of the second signaling data, and
multiplexing the first RS encoded first signaling data with the interleaved second signaling data;
forming data groups including the mobile service data and the encoded signaling data; and
transmitting the digital broadcast signal including data in the formed data groups,
wherein the mobile service data includes video data, the video data including data of a base layer and data of an enhanced layer, and wherein the enhanced layer has a spatial resolution or quality different from that of the base layer.
2. The method of claim 1 , wherein a corresponding area of the base layer is an intra-mode coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
3. The method of claim 1 , wherein a corresponding area of the base layer is a residual coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
4. The method of claim 1 , wherein interleaving the second RS encoded second signaling data is performed in a block unit, wherein a size of the block unit is TNoG*51 bytes, wherein TNoG is a total number of data groups transmitted during a sub-frame.
5. An apparatus for processing a digital broadcast signal including mobile service data, the apparatus comprising:
a signaling encoder configured to encode signaling data including first signaling data and second signaling data, wherein the first signaling data includes transmission parameters for the mobile service data and the second signaling data includes cross layer information between a physical layer and an upper layer, the signaling encoder comprising:
a first encoder configured to first Reed-Solomon (RS) encode the first signaling data at a first RS code rate,
a second encoder configured to second RS encode the second signaling data at a second RS code rate,
an interleaver configured to interleave the second RS encoded second signaling data, the interleaver further configured to write the second RS encoded second signaling data row-by-row from left-to-right and top-to-bottom and output the written second signaling data by reading column by column from top-to-bottom and left-to-right of the second signaling data, and
a multiplexer configured to multiplex the first RS encoded first signaling data with the interleaved second signaling data;
a group formatter configured to form data groups including the mobile service data and the encoded signaling data; and
a transmission unit configured to transmit the digital broadcast signal including data in the formed data groups,
wherein the mobile service data includes video data, the video data including data of a base layer and data of an enhanced layer, and wherein the enhanced layer has a spatial resolution or quality different from that of the base layer.
6. The apparatus of claim 5 , wherein a corresponding area of the base layer is an intra-mode coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
7. The apparatus of claim 5 , wherein a corresponding area of the base layer is a residual coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
8. The apparatus of claim 5 , wherein interleaving the second RS encoded second signaling data is performed in a block unit, wherein a size of the block unit is TNoG*51 bytes, wherein TNoG is a total number of data groups transmitted during a sub-frame.
9. A method of receiving a digital broadcast signal including mobile service data in a receiver, the method comprising:
receiving the broadcast signal including mobile service data and signaling data for the mobile service data, wherein the mobile service data and signaling data are processed in steps comprising:
encoding the signaling data including first signaling data and second signaling data, wherein the first signaling data includes transmission parameters for the mobile service data and the second signaling data includes cross layer information between a physical layer and an upper layer, wherein encoding the signaling data comprises:
first Reed-Solomon (RS) encoding the first signaling data at a first RS code rate,
second RS encoding the second signaling data at a second RS code rate,
interleaving the second RS encoded second signaling data, comprising:
writing the second RS encoded second signaling data row-by-row from left-to-right and top-to-bottom; and
outputting the written second signaling data by reading column by column from top-to-bottom and left-to-right of the second signaling data; and
multiplexing the first RS encoded first signaling data with the interleaved second signaling data;
forming data groups including the mobile service data and the encoded signaling data;
extracting the signaling data in the broadcast signal; and
decoding the mobile service data using the extracted signaling data,
wherein the mobile service data includes video data, the video data includes data of a base layer and data of an enhanced layer, and wherein the enhanced layer has a spatial resolution or quality different from that of the base layer.
10. The method of claim 9 , wherein a corresponding area of the base layer is an intra-mode coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
11. The method of claim 9 , wherein a corresponding area of the base layer is a residual coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
12. The method of claim 9 , wherein the interleaving the second RS encoded second signaling data is performed in a block unit, wherein size of the block unit is TNoG*51 bytes, the TNoG being a total number of data groups being transmitted during a sub-frame.
13. An apparatus for receiving a digital broadcast signal including mobile service data, the apparatus comprising:
a receiving unit configured to receive the broadcast signal including mobile service data and signaling data for the mobile service data, wherein the mobile service data and signaling data are processed in steps comprising:
encoding signaling data including first signaling data and second signaling data, wherein the first signaling data includes transmission parameters for the mobile service data and the second signaling data includes cross layer information between a physical layer and upper layer(s), the encoding signaling data comprising:
first Reed-Solomon (RS) encoding the first signaling data at a first RS code rate,
second RS encoding the second signaling data at a second RS code rate,
interleaving the second RS encoded second signaling data, comprising:
writing the second RS encoded second signaling data row-by-row from left-to-right and top-to-bottom,
outputting the written second signaling data by reading column by column from top-to-bottom and left-to-right of the second signaling data, and
multiplexing the first RS encoded first signaling data with the interleaved second signaling data; and
forming data groups including the mobile service data and the encoded signaling data;
an extracting unit configured to extract the signaling data in the broadcast signal; and
a decoding unit configured to decode the mobile service data using the extracted signaling data,
wherein the mobile service data includes video data, the video data including data of a base layer and data of an enhanced layer, and wherein the enhanced layer has a spatial resolution or quality different from that of the base layer.
14. The method of claim 13 , wherein a corresponding area of the base layer is an intra-mode coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
15. The method of claim 13 , wherein a corresponding area of the base layer is a residual coded area to predict a target block of the enhanced layer using the corresponding area of the base layer.
16. The method of claim 13 , wherein interleaving the second RS encoded second signaling data is performed in a block unit, wherein a size of the block unit is TNoG*51 bytes, wherein TNoG is a total number of data groups transmitted during a sub-frame.