Rate control for VBR video over ATM: simplification and implementation

Rate control is essential to ensure high-quality video transmission over asynchronous transfer mode (ATM) networks; both source and channel rates must not violate buffer or network traffic constraints in order to guarantee decoded video quality. To date, source and channel rate selection has been pe...

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Veröffentlicht in:IEEE transactions on circuits and systems for video technology Jg. 11; H. 9; S. 1045 - 1058
Hauptverfasser: Yan Yang, Hemami, S.S.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.09.2001
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Applied sciences
Asynchronous transfer mode
Bit rate
Buffers
Channels
Communication system traffic control
Control algorithms
Decoding
Distortion
Exact sciences and technology
Frames
Image processing
Information, signal and communications theory
Networks
Packet switching
Performance gain
Quality of service
Rate distortion theory
Rate-distortion
Signal processing
Systems, networks and services of telecommunications
Telecommunication traffic
Telecommunications
Telecommunications and information theory
Traffic engineering
Traffic flow
Transmission and modulation (techniques and equipments)
Performance evaluation
Wavelet transformation
Coding
Video signal
Traffic control
Signal processing
Teletraffic
Speed control
Digital transmission
Asynchronous transfer mode
ISSN:1051-8215, 1558-2205
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Zusammenfassung:Rate control is essential to ensure high-quality video transmission over asynchronous transfer mode (ATM) networks; both source and channel rates must not violate buffer or network traffic constraints in order to guarantee decoded video quality. To date, source and channel rate selection has been performed jointly because the rates are related through buffer and network constraints and therefore appear to be interdependent. It is shown that selection of these rates can be separated and the rate control problem is therefore simplified, allowing sequential source and channel rate selection without the need for iteration. A rate control algorithm is proposed which implements noniterative, separate sequential selection of source and channel rates in order to minimize the distortion variation between frames, subject to all buffer and network constraints. In particular, the leaky bucket is used as the traffic policing mechanism. Achieving a target rate for individual frames is facilitated by using a rate-distortion optimized video coder which allows coding to an exactly specified rate or distortion. Channel rate selection is performed following source rate selection with the goal of providing smooth traffic to the network, thereby allowing a high statistical multiplexing gain. Experiments demonstrate that the proposed noniterative rate control algorithm, when implemented using the optimized coder, achieves consistent video quality while providing smooth traffic to the network.
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ISSN:1051-8215
1558-2205
DOI:10.1109/76.946521