| 3TableALECencoder( di , n , code) |
| // encode() is the encode function |
| // is the current residue value |
| // n is the block size (the number of residue values to be encoded at a time) |
| // code is the encoded bitstream of n |
| // *denotes concatenation |
| // encode block of n using the first Huffman Table of the 3-Huffman Table ALEC Coder |
| CALL encode() with block of n and Table A RETURNING |
| SET A To |
| // compute the size of the encoded bitstream A |
| SET size_A TO length(A) |
| // encode the same block of n using the second Huffman Table of the 3-Huffman Table ALEC Coder |
| CALL encode() with block of n and Table B RETURNING |
| SET B To |
| // compute the size of the encoded bitstream B |
| SET size_B TO length(B) |
| // encode the same block of n using the third Huffman Table of the 3-Huffman Table ALEC Coder |
| CALL encode() with block of n and Table C RETURNING |
| SET C To |
| // compute the size of the encoded bitstream C |
| SET size_C TO length(C) |
| // compare size_A, size_B and size_C and select the encoded bitstream with the least compressed size |
| IF size_A <= min(size_B, size_C) THEN |
| // generate the table identifier of Table A |
| SET ID TO “10” |
| // append encoded bitstream A to ID |
| SET code TO ID * A |
| ELSEIF size_B <= min(size_A, size_C) THEN |
| // generate the table identifier of Table B |
| SET ID TO “11” |
| // append encoded bitstream B to ID |
| SET code TO ID * B |
| ELSEIF size_C <= min(size_A, size_B) THEN |
| // generate the table identifier of Table C |
| SET ID TO “0” |
| // append encoded bitstream C to ID |
| SET code TO ID * C |
| ENDIF |
| RETURN code |
