informed of the change in channel information when the cable tv broadcast station changes the channel information included in the si and transmits the changed channel information therefore in case of profile 1 even if the channel information is changed the cable program receiver maintains the original channel list thereby causing the channel list to contain incorrect information the si within each table transmits a crc code in order to check for any errors at this point when at least one set of information included in a table is changed the crc code value of the corresponding table also changes accordingly the present invention uses the crc code in order to verify or check whether the channel information within the si has changed and to update the original channel list in case the channel information has been changed the present invention may use a crc code of at least one table among the plurality of table transmitted to profile 1 the crc code within the svct will be given as an example of the present invention it is apparent that the present invention is not limited only to this example and that the crc code within the nit or other tables may also be used herein alternatively the crc code of a plurality of table associated with the channel information may also be used herein fig3 illustrates a syntax structure for a short form virtual channel table svct in the example shown in fig3 the table_id field value is set to 0xc4 a subtable type table_subtype field indicates three maps i e dcm vcm icm that are transmitted to the svct section if the subtable type field indicates the dcm a dcm_structure is performed on the other hand if the.