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Scalable Video Coding provides temporal, spatial and quality scalability using layers within the encoded bitstream. This feature allows the encoded bitstream to be adapted to different devices and heterogeneous networks. This paper proposes a technique to convert an H.264/AVC bitstream in Baseline profile to a scalable stream which provides temporal scalability. Applying the presented approach, a...
Video contents needs to be compressed in order to reduce the resources required for storage and network transmission. It is desirable that the encoded bitstreams are adaptable to the varying characteristics of consumer electronics devices and heterogeneous networks. Scalable Video Coding provides temporal, spatial and quality scalability by organizing the encoded bitstream into layers. Since the majority...
Scalable video coding is an important mechanism to provide different types of end-user devices with different versions of the same encoded bitstream. However, scalable video encoding remains a computationally expensive operation. To decrease the complexity we propose generic techniques. These techniques can also be combined with existing fast mode decision modes. We show that extending these existing...
In this paper, an algorithm for improving image quality with original optimized rate-distortion extraction mechanism in the scalable extension with H.264/AVC is proposed. In our algorithm, the importance of the first MGS (medium grain scalability) layer was thought higher, thus we carry more weight on it when estimating quality information and assigning priority IDs. In our experiment, the PSNR (peak...
The article desribes a metric for H.264/AVC compressed video quality evaluation, which is being developed by our group. The metric operates on the encoded bitstream only. It uses the data directly present in the bitstream (or just entropy coded). No pixel decoding should be necessary, which will result in low computational complexity, and cosequently the possibility to analyze several bitstreams simultaneously...
This contribution presents a concept of a novel objective metric for MPEG-4 AVC / H.264 video no-reference quality evaluation. The metric should operate on the encoded bitstream only, bringing the great benefit of reducing computational complexity as no pixel decoding is necessary. We are only relying on the information directly present in the encoded bitstream. One part of the system is analyzed...
With the standardization of H.264/AVC by ITU-T and ISO/IEC and the adaptatation into new hardware, the necessity of transcoding between existing standards and H.264 will arise to achieve interoperability between hardware devices. Because of the many new prediction parameters as well as the pixel-based deblocking filter and the new transform of H.264 this is a difficult task to perform. In our work...
Block matching motion estimation (BMME) plays a very important role in video coding. The performance of BMME greatly affects the quality of the encoded bitstream. Full search (FS) is the optimal algorithm for BMME. But the tremendous computation payload of it is unaffordable for practical applications, especially for real-time applications. To overcome this problem, this paper presents an efficient...
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