Project Details
Abstract
In this proposal, we intend to study the media playout control mechanisms for
multimedia streaming applications. It is well known that the random packet delay in
networks will induce delay jitter, which can seriously affect the playout quality of
video streaming. Thus, in order to eliminate the jitter, allocating a palyout buffer with
enough size at the client is required. However, using the playout buffer may lead to
additional playout delay. Obviously, a larger buffer size will result in larger palyout
delay, which may not be acceptable for customers. On the contrary, if the buffer size
is set to be small, the buffer underflow events which will intermit the video playback
can occur frequently. Moreover, the probability of buffer overflow which yields
packet losses and thus degrades the video quality increases as the buffer size
decreases. That is, there exists a trade-off between the playout delay and the buffer
underflow (or overflow). Therefore, how to improve the playout delay and underflow
performance simultaneously becomes an annoying problem. In this project, we will
present an Adaptive Media Playout (AMP) mechanism for resolving the above
mentioned issues. In our proposed AMP mechanism, we set two threshold values,
denoted as L and H, for the playout controller to dynamically adjust the playout rate
according to the number of buffered packets. When the number of buffered packets is
less than L, the playout rate will slow down. While the number of buffered packets is
greater than H, the palyout rate will speed up. As for the case where the number of
buffered packets is between L and H, we adopt the instant packet arrival rate, which is
estimated by the proposed Arrival Process Tracking Algorithm (APTA), to determine
the appropriate playout rate. Finally, we will employ computer simulations to
demonstrate the performance of our proposed AMP design, and compare it with the
other AMP schemes presented in literatures to show its superiority.
Project IDs
Project ID:PB9808-2387
External Project ID:NSC98-2221-E182-026
External Project ID:NSC98-2221-E182-026
Status | Finished |
---|---|
Effective start/end date | 01/08/09 → 31/07/10 |
Keywords
- Multimedia Streaming
- Adaptive Media Playout
- Delay Jitter
- BufferMechanism
- Playout Delay
- Overflow
- Underflow
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