Apparatus and method for encoding and decoding signals
View Patent ↗New capabilities will allow conventional broadcast transmission to be available to mobile devices. A method is described including receiving a data set, extracting a subset, encoding the subset using a first encoding process, combining the encoded subset with the remaining portion, and encoding the combined data set including the appended subset using a second encoding process. an apparatus is described including means for extracting a subset, means for first encoding, means for combining, and means for second encoding. An apparatus for decoding includes a data identifier receiving a data set and identifying a subset of data, a first decoder decoding the subset using a first decoding process, and a second decoder combining the subset of data with a remaining portion of the data set and decoding the combined data using a second decoding process. A method for decoding is also described.
1. A method comprising the steps of:
receiving a data set in an encoder having a processor, the data set arranged in packets;
extracting a subset of packets from the data set;
encoding the subset of packets using a byte code encoding process;
modifying a packet identifier for the subset of packets after encoding using said byte code encoding process;
combining the encoded subset of the data set with the remaining portion of the data set; and
encoding the combined data set using a second encoding process different than said byte code encoding process.
2. The method of claim 1 , wherein the byte code encoding process uses a Galois Field generator matrix to supplement the data in the subset of the data set.
3. The method of claim 1 , wherein the step of combining includes appending the encoded subset of the data set to the remaining portion of the data set.
4. The method of claim 1 , wherein the second encoding process is a Reed-Solomon encoding process.
5. The method of claim 1 , wherein the step of encoding using a byte code encoding process includes encoding at a first encoding rate.
6. The method of claim 5 , further comprising the steps of:
extracting a second subset of the data set;
encoding the second subset of the data set using the byte code encoding process, wherein encoding the second subset using the first encoding process includes encoding at a second encoding rate; and
combining the second encoded subset of data with the combined data set.
7. The method of claim 1 , wherein the byte code encoding process is Serial Concatenated Block Coding over a Galois Field.
8. The method of claim 1 wherein each packet includes 187 bytes of data.
9. The method of claim 1 , further comprising the step of transmitting the combined data.
10. The method of claim 1 , wherein the step of combining includes inserting at least a portion of the subset of the data set within the remaining portion of the data set.
11. The method of claim 1 , wherein the method is used in a broadcast television system.
12. A method comprising the steps of:
encoding a first data set using a byte code encoding process in an encoder having a processor, the first data set arranged in packets;
modifying a packet identifier for the first data set after encoding using said byte code encoding process;
combining the encoded first data set with a second data set to produce a combined data set; and
encoding the combined data set using a second encoding process different than said byte code encoding process.
13. The method of claim 12 , wherein the byte code encoding process uses a Galois Field generator matrix to supplement the data in the first data set.
14. The method of claim 12 , wherein the second encoding process is a Reed-Solomon encoding process.
15. The method of claim 12 , wherein the step of encoding using a byte code encoding process includes encoding at a first encoding rate.
16. The method of claim 15 , further comprising the steps of:
encoding a third data set using the byte code encoding process, wherein the third data set is encoded at a second encoding rate; and
combining the third encoded data set with the combined data set.
17. The method of claim 12 , wherein the step of combining includes appending the encoded first data set to the second data set.
18. The method of claim 12 , wherein the byte code encoding process is Serial Concatenated Block Coding over a Galois Field.
19. The method of claim 12 wherein each packet includes 187 bytes of data.
20. The method of claim 12 , wherein the method is used in a television broadcast system.