| BruteForceCompress( xi , xi − 1 , n, y ) |
| // is the current sensor reading(s) |
| // _1 is the immediate past sensor reading(s) |
| // n is the block size (the number of samples read each time) |
| // y is the final encoded bitstream |
| // 2TableALECencoder() is the 2-Huffman Table ALEC encode function |
| // 3TableALECencoder() is the 3-Huffman Table ALEC encode function |
| |
| // compute the residue |
| SET TO –
|
| // encode the residue |
| // encode block of n using the 2-Huffman Table ALEC encode function |
| CALL 2TablesALECencoder() with block of n RETURNING code |
| SET codeA To code |
| // compute the size of the encoded bitstream codeA |
| SET size_A TO length(codeA) |
| // encode the same block of n using the 3-Huffman Table ALEC encode function |
| CALL 3TablesALECencoder() with the same block of n RETURNING code |
| SET codeB To code |
| // compute the size of the encoded bitstream codeB |
| SET size_B TO length(codeB) |
| // compare size_A and size_B and select the encoded bitstream with the least compressed size |
| IF size_A <= size_B THEN |
| // generate the code option identifier for the 2-Huffman Table ALEC encoder |
| SET ID TO “0” |
| // append encoded bitstream codeA to ID |
| SET strm TO ID * codeA |
| ELSE |
| // generate the code option identifier for the 3-Huffman Table ALEC encoder |
| SET ID TO “1” |
| // append encoded bitstream codeB to ID |
| SET strm TO ID * codeB |
| ENDIF |
| // append bitstream strm to y |
| SET y TO y * strm |
| RETURN y |
