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In video coding, the coding decisions made during the encoding of a reference frame impact the achievable rate distortion performance of all inter-predicted frames which refer to it. Most encoders operate frame-by-frame and do not specifically consider this inter-dependency. In this paper, a multi-frame transform coefficient optimization method for H.265/HEVC is proposed. The inter-frame dependencies...
It is a well-known fact that, in order to overcome annoying blocking artifacts, transforms with block-overlapping basis functions have been proposed for image coding. Typically in transform coding, the encoder determines the transform coefficient values by applying the forward transform followed by scalar quantization. In this paper we present an approach, how rate-distortion optimized Lapped Biorthogonal...
We propose a block based video coder with multiple motion models. The coder is designed such that each block can be predicted using the motion model with the best rate-distortion performance. In such a scheme, there is a significant impact on the interpolation, motion compensated prediction structure and the design of motion vector predictors, because neighboring blocks could have been predicted by...
Block-based video-coding for 4:4:4 color sampling is extended by an adaptive color space transform. The presented technique enables an encoder to switch between several given color space representations in order to optimize rate-distortion performance. Simulations based on the current draft of the H.264/MPEG4-AVC 4:4:4 extensions demonstrate that our technique provides a rate-distortion performance...
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