How does the device control model in HAVi differ from that of IEEE-1394?

In IEEE-1394, an application on one 1394 device sends the AV/C command (or data) directly to another 1394 device via the 1394 device drivers (which are on both devices). In HAVi, the HAVi application sends the command (or data) to the DCM (or FCM) that represents the target device (or functionality of the target device), and the DCM/FCM converts the command into a format that the target device can understand. It then sends this command to the target device.

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