Chen95 Huang-Jen Chen, A Disk Scheduling Scheme and MPEG Data Layout Policy for Interactive Video Access from a Single Disk Storage Device, Ph.D. thesis, Boston University, College of Engineering, 1995.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....network at a fixed frame rate. To maintain a constant disk access time, disk scheduling policies are needed. In time striping, video frames within a block are stored contiguously to optimize the access time of the disk. For MPEG video, a block usually consists of a number of consecutive GOPs. In [8], Chen proposed an attractive disk scheduling scheme for MPEG video, in which MPEG frames within a block are organized in the order of their significance, with B frames placed at the end of the block. This scheme has the advantage that when disk resources are oversubscribed, B frames can be ....

H.-J. Chen. A Disk Scheduling Scheme and MPEG Data Layout Policy for Interactive Video Access from a Single Disk Storage Device. PhD thesis, Boston University, College of Engineering, 1995.

....sequence of frames, dropping it results in large cuts in the video, causing a drastic loss of quality. We address this issue and propose solutions in the next section. 3. 2 Content Reorganization Within a Stream The idea of content reorganization to achieve QoS scaling is inspired by Chen et al. [4]. We make a new application of this concept to provide multiple content progression rates. Dropping of content imposes a restriction that the media access units (frames) to be dropped must lie entirely within the optional block. These units must also be smoothly distributed in the playout in order ....

....the original scheme. 3.5 Placement for Single Disks In earlier sections, we detailed schemes for supporting multiple content rates from a single storage format for multi disk architectures. There is some relevance for VOD servers that are designed around single disks (i.e. without disk striping) [4]. With this in mind, we present a single disk solution for the rate adaptation problem. In single disk architectures, continuous media data should be placed contiguously to minimize seek overhead [4] This is even more significant with modern disk drives since they cache entire tracks during a ....

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H-. J. Chen, "A Disk Scheduling Scheme and MPEG Data Layout Policy for Interactive Access from a Single Disk Storage Device," Ph. D. Dissertation, Dept. of Electrical, Computer and Systems Engineering, Boston University, Aug. 1995.

....MPEG streams from a single disk drive. These streams would have to be delivered to workstations on the campus LAN where they can be decoded and played out. In particular, we wanted to make an evaluation of how well multiple streams are supported by the disk scheduling strategy discussed in [1, 2, 3] by the use of a working prototype. A secondary objective is to make a modular testbed available that will enable us to evaluate various VOD scenarios and server subsystems. Unlike conventional data types, video data has strict timing and large bandwidth requirements. Further the long and ....

H-. J. Chen, "A Disk Scheduling Scheme and MPEG Data Layout Policy for Interactive Access from a Single Disk Storage Device," Ph. D. Dissertation, Dept. of Electrical, Computer and Systems Engineering, Boston University, August 24, 1995.

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Chen95 Huang-Jen Chen, A Disk Scheduling Scheme and MPEG Data Layout Policy for Interactive Video Access from a Single Disk Storage Device, Ph.D. thesis, Boston University, College of Engineering, 1995.

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