Method and apparatus for serving data

Abstract

VPI/VCI of an ATM cell is translated into an internal ID by distribute VPI/VCI entries into sections in a table according to a portion of each VPI/VCI entry. A section to be searched according to the portion of a VPI/VCI of the received ATM cell is selected; and a search over the selected section is performed to find an entry corresponding to the VPI/VCI of the received ATM cell. An internal ID corresponding to the found entry is outputted.

1. A method for delivering data comprising the steps of:
 receiving data from a network;  
 detecting at least first and second present bit patterns in the received data when the received data is transmitted to a storage device;  
 adding location information corresponding to locations of said at least first and second present bit patterns in the data to a list when said at least first and second preset bit patterns are detected;  
 storing the data in the storage device; and  
 controlling a delivery of the data from the storage device to the network according to the location information of said at least first and second preset bit pattern in the data in the list.  
 
     
     
       2. A method according to  claim 1 , wherein the data includes video data compressed according to MPEG standard and the location information represents at least a location of I-picture, and the step of controlling comprises accessing the I-picture of the data stored in the storage device according to the location information. 
     
     
       3. A method according to  claim 1 , wherein detecting at least first and second preset bit patterns includes detecting the second preset bit pattern immediately following the first preset bit pattern. 
     
     
       4. A method according to  claim 1 , wherein the first preset bit pattern includes group_start_code in MPEG format. 
     
     
       5. A method according to  claim 1 , wherein the second preset bit pattern includes picture_start_code in MPEG format. 
     
     
       6. An apparatus for delivering data comprising:
 receiving means for receiving data from a network;  
 a pattern detector for detecting at least first and second preset bit patterns in the received data when the data is transmitted from the receiving means to a storage device;  
 a list for storing location information corresponding to locations of said at least first and second preset bit patterns in the data when said at least first and second preset bit patterns are detected by the pattern detector; and  
 means for controlling a delivery of the data from the storage device to the network according to the location information in the list.  
 
     
     
       7. An apparatus according to  claim 6 , wherein the data includes video data compressed according to MPEG standard and the location information represents at least a location of I-picture, and the means for controlling controls the storage device so that the I-picture is accessed according to the location information. 
     
     
       8. An apparatus according to  claim 6 , wherein the pattern detector is configured to detect the second present bit pattern immediately following the first preset bit pattern. 
     
     
       9. An apparatus according to  claim 6 , wherein the first preset bit pattern includes group_start_code in MPEG format. 
     
     
       10. An apparatus according to  claim 6 , wherein the second preset bit pattern includes picture_start_code in MPEG format. 
     
     
       11. Apparatus for delivering a video data stream from a storage to receiver devices via a public network, comprising:
   means for detecting at least first and second preset bit patterns in the video data to be delivered;        means for generating location information representing the locations in said storage of the video data corresponding to said detected preset bit patterns in said video data; and        means for controlling delivery of said video data stream to the public network according to the location information of said detected preset bit patterns in said video data.     
     
     
       12. A method for delivering a video data stream from a storage to receiver devices via a public network, comprising the steps of:
   detecting at least first and second preset bit patterns in the video data to be delivered;        generating location information representing the locations in said storage of the video data corresponding to said detected preset bit patterns in said video data; and        controlling delivery of said video data stream to the public network according to the location information of said detected preset bit patterns in said video data.