Error concealment by data partitioning
| Autor: | Yashoda Nag, Iole Moccagatta, Gene Cheung, Raj Talluri |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Computer science
Image quality business.industry ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Image processing Data_CODINGANDINFORMATIONTHEORY computer.file_format Video quality Quarter-pixel motion Signal Processing MPEG-4 Computer vision Computer Vision and Pattern Recognition Artificial intelligence Electrical and Electronic Engineering Bitstream business computer Software Communication channel Data compression |
| Zdroj: | Signal Processing: Image Communication. 14:505-518 |
| ISSN: | 0923-5965 |
| DOI: | 10.1016/s0923-5965(98)00064-2 |
| Popis: | This paper presents an error concealment strategy for improving the quality of compressed video data when transmitted over noisy communication channels. Data partitioning is used to enable the recovery of motion information when the compressed bit stream is corrupted by channel errors. At low bit-rates the motion data is a significant part of the entire video stream and its recovery enables the decoder to perform motion compensated error concealment and hence maintain adequate video quality. The technique is shown to provide superior decode video quality over wide variety of channel errors, bit-rates and test sequences. In order to enable effective error concealment the partitioned motion and texture data are separated by a motion marker. The motion marker needs to be unique from any valid combination of the motion VLC data. In this paper, we also present an efficient search algorithm to identify such a motion marker with good error resilience properties. This error concealment technique was proposed to the ISO MPEG4 standard and based on its performance, it has been accepted as part of the evolving standard definition. |
| Databáze: | OpenAIRE |
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