Inter frame

About: Inter frame is a research topic. Over the lifetime, 4154 publications have been published within this topic receiving 63549 citations.

Long-term memory prediction using affine motion compensation

Abstract: Long-term memory prediction extends motion compensation from the previous frame to several past frames with the result of increased coding efficiency. We demonstrate that combining long-term memory prediction with affine motion compensation leads to further coding gains. For that, various affine motion parameter sets are estimated between frames in the long-term memory buffer and the current frame. Motion compensation is conducted using standard block matching in the multiple reference frame buffer. The picture reference and the affine motion parameters are transmitted as side information. The technique is embedded into a hybrid video coder mainly following the H.263 standard. The coder control employs Lagrangian optimization for the motion estimation and macroblock mode decision. Significant bit-rate savings between 20 and 50% are achieved for the sequences tested over TMN-10 the test model of H.263+. These bit-rate savings correspond to gains in PSNR between 0.8 and 3 dB.

Encoding and decoding video signals using spatial filtering

Abstract: Reference frames are generated by applying spatial filtering to decoded video frames after pixel reconstruction. For encoding video signals, the reference frames are used to encode subsequent video frames using interframe encoding. For decoding video signals, the reference frames are used to decode subsequent video frames using interframe decoding. In a preferred embodiment, motion estimation and motion compensation form part of the interframe encoding and decoding procedures.

Methods and systems for motion vector derivation at a video decoder

Abstract: Method and apparatus for deriving a motion vector at a video decoder. A block-based motion vector may be produced at the video decoder by utilizing motion estimation among available pixels relative to blocks in one or more reference frames. The available pixels could be, for example, spatially neighboring blocks in the sequential scan coding order of a current frame, blocks in a previously decoded frame, or blocks in a downsampled frame in a lower pyramid when layered coding has been used.

Method and apparatus for motion compensated frame rate up conversion

Abstract: A method and apparatus for video frame interpolation using a current video frame, at least one previous video frame, and a set of transmitted motion vectors is described. A first set of motion vectors is created as a function of the set of transmitted motion vectors. An intermediate video frame is identified, where the intermediate video frame having a plurality of non-overlapping blocks. Each non-overlapping block is assigned with at least one motion vector chosen from the first set of motion vectors to create a set of assigned motion vectors. Then, a second set of motion vectors is created as a function of the assigned set of motion vectors. A video frame is generated using the second set of motion vectors.

Intra/inter decision rules for encoding and decoding video signals

Abstract: A compressed bitstream signal corresponding to an image is decompressed to generate a decompressed image signal and the decompressed image signal is displayed. For each of a plurality of interframe quantization levels, there is a corresponding intraframe quantization level and a corresponding energy measure threshold value. The correspondence between the interframe quantization levels, on the one hand, and the intraframe quantization levels and energy measure threshold values, on the other, is determined using one or more training video frames. For encoding, blocks of video frames are either interframe encoded or intraframe encoded as selected based on a selected interframe quantization level and the corresponding energy measure threshold value. For decoding, blocks of encoded video frames are either interframe decoded or intraframe decoded as selected based on a selected interframe quantization level and the corresponding energy measure threshold value.