Crosslayer-based streaming apparatus and method

The present invention relates to a streaming apparatus and method. According to a first aspect of the present invention, a streaming apparatus according to an embodiment of the present invention comprises: a packet monitoring unit for determining whether or not a packet loss has occurred in a received image segment; and a debt burden performing unit for generating a mock ACK for the reception of the lost packet on the basis of a predetermined criterion, if it is determined that the packet loss has occurred in the image segment, whereby it is possible to provide an efficient streaming service.