Multiple channel data bus control for video processing

Abstract

A method, apparatus, computer medium, and other embodiments for selectably enabling a plurality of data transfer modes along one or more channels are described. In one embodiment, data transfer between a first device and a second device is controlled based on selecting a combination of access and operation modes. In another embodiment, a video processing system capable of selectably enabling a plurality of data transfer modes along one or more channels is described.

1 . A system for transferring data between a source device communicatively coupled to a destination device, comprising:
 coupled to the source and destination devices, means for selectively enabling multiple channel data transfer modes between the source device and the destination device;   wherein a data transfer mode is selected from a group of the multiple channel data transfer modes comprising fixed length single burst mode, a chaining mode, an auto-rollback mode, a virtual channel mode, and a multiple-segment mode.   
   
   
       2 - 4 . (canceled) 
   
   
       5 . The system of  claim 1  further comprising the source device and the destination device. 
   
   
       6 . A method for selectably enabling multiple data transfer modes between devices and storage elements in a video processing system, comprising:
 initiating a data transfer between components of the video processing system;   selecting a channel capable of facilitating the data transfer;   selecting an operation mode in which the channel will operate, wherein available operation modes include a multi-segment operation mode for transferring noncontiguous blocks of data; and   enabling the data transfer to be performed at one or more transfer rates using the selected channel and operation mode.   
   
   
       7 . The method of  claim 6 , wherein available operation modes further include at least one of a fixed length single burst mode where each data transfer begins at a common address and lasts for a common length, and a chaining mode where each subsequent data transfer is initiated from the end of a present data transfer so as to form a chain of data transfers. 
   
   
       8 . The method of  claim 6 , wherein available operation modes further include an auto-rollback mode where upper and lower boundary addresses are provided so that when a next data transfer address reaches the upper boundary address, a current address indicator automatically rolls back to the lower boundary address. 
   
   
       9 . The method of  claim 6 , wherein responsive to the multi-segment operation mode being selected, the method further includes transferring a block of a video frame. 
   
   
       10 . The method of  claim 6 , further comprising:
 determining a segment count indicator and a segment spacing indicator from operational characteristics associated with the data transfer.   
   
   
       11 . The method according to  claim 6 , further comprising:
 determining a base address representing a starting address of a first data segment; and   selecting a starting address of a subsequent data segment to be an address determined from the base address offset based on a segment count indicator and a segment spacing indicator.   
   
   
       12 - 20 . (canceled)