Joint resolution enhancement and artifact reduction for MPEG-2 encoded digital video
نویسندگان
چکیده
A joint approach of resolution enhancement and artifact reduction for MPEG-2 encoded video is proposed in this paper. This new method uses a Unified Metric for Digital Video Processing (UMDVP). The UMDVP is defined based on coding information of MPEG-2 encoded video. It also takes the local scene content into account. Experimental results have demonstrated that the joint approach using the UMDVP outperforms the system of resolution enhancement and artifact reduction without the help of UMDVP. The proposed method can improve the performance of various emerging video systems using MPEG-2 compression.
منابع مشابه
Visibility of individual packet loss on H.264 encoded video stream – A user study on the impact of packet loss on perceived video quality
Assessing video content transmitted over networked content infrastructures becomes a fundamental requirement for service providers. Previous research has shown that there is no direct correlation between traditional network QoS and user perceived video quality. This paper presents a study investigating the impact of individual packet loss on four types of H.264 main-profile encoded video stream...
متن کاملA unified approach to restoration, deinterlacing and resolution enhancement in decoding MPEG-2 video
The quality and spatial resolution of video can be improved by combining multiple pictures to form a single superresolution picture. We address the special problems associated with pictures of variable but somehow parameterized quality such as MPEG-decoded video. Our algorithm provides a unified approach to restoration, chrominance upsampling, deinterlacing, and resolution enhancement. A decode...
متن کاملReduction of Coding Artifacts at Low Bit Rates
Many video and image coding standards such as MPEG, H.261, H.263, and JPEG are based on the discrete cosine transform (DCT). They subdivide images or frames into blocks that are encoded independently. DCT coeecients that are considered to be less important are discarded. The achievable compression ratios are normally limited by visible discontinuities along block boundaries, the so called block...
متن کاملSpatio-Temporal Scalable Video Codecs with MPEG-Compatible Base Layer
A new technique of scalable coding is proposed for progressive video with bitrates of order of megabites per second. The goal is to improve spatial scalability of MPEG-2 by introducing spatiotemporal scalability. The technique proposed needs less coding overhead than in MPEG-2 spatially scalable scheme and an enhancement layer bitstream with its bitrate not less than the bitrate in a base layer...
متن کاملArtifact-Free Variational MPEG Decompression
We propose a variational method for artifact-free video decompression that is capable of processing any MPEG-2 encoded movie. The method extracts, from a given MPEG-2 file, a set of admissible image sequences and minimizes an artifact-penalizing spatio-temporal regularization functional over this set, giving an optimal decompressed image sequence. For regularization, we use the infimal convolut...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2003