Mr. Wade K. Wan Profile

Wade K. Wan

at Massachusetts Institute of Technology

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Proceedings Article | 7 December 2001 Paper

Adaptive format conversion for scalable video coding

Wade Wan, Jae Lim

Proceedings Volume 4472, (2001) https://doi.org/10.1117/12.449769

KEYWORDS: Data conversion, Video, Scalable video coding, Computer programming, Quantization, Televisions, Video coding, Distortion, Transmitters, Resolution enhancement technologies

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The enhancement layer in many scalable coding algorithms is composed of residual coding information. There is another type of information that can be transmitted instead of (or in addition to) residual coding. Since the encoder has access to the original sequence, it can utilize adaptive format conversion (AFC) to generate the enhancement layer and transmit the different format conversion methods as enhancement data. This paper investigates the use of adaptive format conversion information as enhancement data in scalable video coding. Experimental results are shown for a wide range of base layer qualities and enhancement bitrates to determine when AFC can improve video scalability. Since the parameters needed for AFC are small compared to residual coding, AFC can provide video scalability at low enhancement layer bitrates that are not possible with residual coding. In addition, AFC can also be used in addition to residual coding to improve video scalability at higher enhancement layer bitrates. Adaptive format conversion has not been studied in detail, but many scalable applications may benefit from it. An example of an application that AFC is well-suited for is the migration path for digital television where AFC can provide immediate video scalability as well as assist future migrations.

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