A method and an apparatus for transmittingreceiving channel state information for use in multi-antenna system are provided. Clocks entering from outside sources can be a source of on-chip-variations resulting in unacceptable clock edge skewing. The HDD 23 is connected to the image processing unit 9 and is capable of storing the image data to be delivered. For example, an update of a record in the database can be identified, and a story created automatically about the update and sent to the users that are following the record.