Method of managing multimedia data and mobile communication terminal equipped with function of managing multimedia data

Abstract

A mobile communication terminal having a function of managing multimedia data is provided, including: a main memory including a multimedia database storing the multimedia data; a signal processor converting the multimedia data stored in the main memory into data of a format suitable to be output to a display of the mobile communication terminal; a back_end chip which processes the multimedia data outputted from the signal processor, stores digest information of multimedia data upon occurrence of an update event of the multimedia data, and provides the stored digest information upon receiving a signal of requesting the digest information to be synchronized; and a front_end chip including a controller which requests the digest information stored in the back_end chip, compares and synchronizes the digest information offered from the back_end chip and digest information stored in advance in the front_end chip.

1 . A mobile communication terminal having a function of managing multimedia data, comprising:
 a main memory to store the multimedia data;   a signal processor to convert the multimedia data stored in the main memory from a first format into a second format to be output to a display of the mobile communication terminal;   a first sub-memory to store a first digest information of multimedia data;   a controlling unit to control the mobile communication terminal, to request the first digest information stored in the first sub-memory, to compare the first digest information provided in the first sub-memory and a second digest information stored in a second sub-memory,   wherein the controlling unit updates the second sub-memory to store the first digest information provided from the first sub-memory if the first digest information provided from the first sub-memory is different from the second digest information stored in the second sub-memory.   
     
     
         2 . The mobile communication terminal of  claim 1 , further comprising a multimedia processor to output the multimedia data outputted from the signal processor. 
     
     
         3 . The mobile communication terminal of  claim 1 , further comprising a digest information processor to provide the first digest information stored in the first sub-memory in response to a signal requesting the first digest information to be synchronized. 
     
     
         4 . The mobile communication terminal of  claim 1 , further comprising a camera unit to convert a light signal inputted via a lens system into an electrical image signal. 
     
     
         5 . The mobile communication terminal of  claim 4 , further comprising a first encryptor to extract and encrypt the first digest information of multimedia data that is outputted in real time from the camera unit or a wireless communication unit or is stored in the main memory. 
     
     
         6 . The mobile communication terminal of  claim 4 , wherein the controlling unit comprises:
 a second encryptor to extract and encrypt the second digest information of multimedia data that is outputted in real time from the camera unit or a wireless communication unit or is stored in the main memory;   the second sub-memory to store the second digest information of multimedia data encrypted by the second encryptor; and   a digest information synchronization unit to compare and synchronize the first digest information of multimedia data received or collected from a digest information processor and the second digest information of multimedia data stored in the second sub-memory.   
     
     
         7 . A method for managing multimedia data in a mobile communication terminal, comprising:
 encrypting and storing first digest information and second digest information of multimedia data in a first sub-memory and a second sub-memory, respectively;   requesting the second digest information of multimedia data stored in the second sub-memory; and   comparing and synchronizing the first digest information of multimedia data provided from the first sub-memory and the second digest information of multimedia data stored in the second sub-memory,   wherein synchronizing the first digest information and the second digest information comprises updating the second sub-memory of a controlling unit to store the first digest information provided from the first sub-memory if the first digest information provided from the first sub-memory is different from the second digest information of multimedia data stored in the second sub-memory.