This paper provided a hybrid coding using spatial and spatial - temporal scalability terms, for coding video with high resolution. In the hybrid method, Intra and Inter video frames are encoded in two different ways. Intra frames are coded using SPIHT algorithm based on More
This paper provided a hybrid coding using spatial and spatial - temporal scalability terms, for coding video with high resolution. In the hybrid method, Intra and Inter video frames are encoded in two different ways. Intra frames are coded using SPIHT algorithm based on wavelet transform and Inter frames are coded using conventional MPEG-2 standard, based on DCT transform. With using this procedure, video is sent through two or three layers. The transmitted data from layers provided the video with different resolution and quality. There for, the user can choose the appropriate services based on their needs. In the spatial scalability, the base layer and enhanced layer have the same coding structure. But in the spatial - temporal scale when the second-upgraded-layer, because it contains only Inter frame, just coded based on standard methods. Simulation results of various videos with high resolution show the image quality of the proposed method in comparison of scalability in multiple layers in MPEG-2 standards.
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In this paper, a hybrid encoder using two features of spatial scalability and spatio-temporal scalability is presented for high resolution video coding. In the combined method, Intra and Inter video frames are coded in two different ways. Intra frames are coded using SP More
In this paper, a hybrid encoder using two features of spatial scalability and spatio-temporal scalability is presented for high resolution video coding. In the combined method, Intra and Inter video frames are coded in two different ways. Intra frames are coded using SPIHT1 algorithm which is based on wavelet transform. Inter frames are coded in the usual MPEG-2 standard way and based on DCT conversion. By coding the video with a high degree of resolution in two ways: spatial scalability and spatial-temporal scalability, the video is sent through two or three layers. The data sent from the layers provide a video with different resolution and quality to the user. In this way, the user can choose the right service based on his needs.
In spatial scalability, the base layer and the upgrade layer have the same coding structure. But in the spatio-temporal scalability of the second upgrade layer, because it only includes Inter frames, it is only coded based on the standard method.
The results of the simulations performed on different videos with a high degree of resolution show the improvement of the final image quality in the proposed hybrid method with scalability in different layers, compared to the method based on the MPEG-2 standard.
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