Abstract
The structure of Group of pictures (GOP) is favorable for GOP-based random-access operations, while inside the GOP, the sequential coding dependency between frames is unfavorable for frame-based random-access or fast-scan operations. In a video streaming system, when some VCR operations such as fast-scan operations are performed, they may cause serious server load or network load due to the speed-up of transmitting frames. In this paper, we formulated the fast-scan and random-access operations of VCR functionality, and proposed a novel frame dependency to eliminate extra server load and minimize requirements of the network bandwidth when performing fast-scan and random-access operations. With the proposed structure, the server does not have to speed up the transmission rate of frames to fulfill the requested playback rate. The number of frames to be transmitted is also significantly reduced, and thus the network load can be decreased.
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