# US 12,192,475 B2 · Predictive motion vector coding

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- Number: US 12,192,475 B2
- Document ID: US12192475B2
- Status: Granted
- Kind: B2
- Application number: 18/234,310
- Filed: 2023-08-15
- Published: 2023-11-30
- Granted: 2025-01-07
- Earliest claimed: 2008-08-04
- Assignees: Dolby Laboratories Licensing Corporation
- Applicants: Dolby Laboratories Licensing Corporation
- Inventors: Alexandros Tourapis; Athanasios Leontaris
- Web page: https://patentgrep.com/patent/US12192475B2

## CPC

- H04N 19/139: Analysis of motion vectors, e.g. their magnitude, direction, variance or reliability
- H04N 19/103: Selection of coding mode or of prediction mode
- H04N 19/105: Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
- H04N 19/152: by measuring the fullness of the transmission buffer
- H04N 19/159: Prediction type, e.g. intra-frame, inter-frame or bidirectional frame prediction
- H04N 19/176: the region being a block, e.g. a macroblock
- H04N 19/182: the unit being a pixel
- H04N 19/30: using hierarchical techniques, e.g. scalability (H04N19/63 takes precedence)
- H04N 19/46: Embedding additional information in the video signal during the compression process (H04N19/517, H04N19/68, H04N19/70 take precedence)
- H04N 19/521: {for estimating the reliability of the determined motion vectors or motion vector field, e.g. for smoothing the motion vector field or for correcting motion vectors}
- H04N 19/573: Motion compensation with multiple frame prediction using two or more reference frames in a given prediction direction
- H04N 19/577: Motion compensation with bidirectional frame interpolation, i.e. using B-pictures
- H04N 19/583: Motion compensation with overlapping blocks
- H04N 19/597: specially adapted for multi-view video sequence encoding
- H04N 19/61: in combination with predictive coding
- H04N 19/184: the unit being bits, e.g. of the compressed video stream
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

Overlapped block disparity estimation and compensation is described. Compensating for images with overlapped block disparity compensation (OBDC) involves determining if OBDC is enabled in a video bit stream, and determining if OBDC is enabled for one or more macroblocks that neighbor a first macroblock within the video bit stream. The neighboring macroblocks may be transform coded. If OBDC is enabled in the video bit stream and for the one or more neighboring macroblocks, predictions may be made for a region of the first macroblock that has an edge adjacent with the neighboring macroblocks. OBDC can be causally applied. Disparity compensation parameters or modes may be shared amongst views or layers. A variety of predictions may be used with causally-applied OBDC.

## Claims

### Claim 1

An apparatus to encode a block motion compensated video bit stream, the apparatus comprising:
an input for receiving input video; and a
processor to encode the input video, wherein the processor:
encodes a first block partition of a picture of the input video having a prediction type of inter-prediction;
encodes a second block partition of the picture, the second block partition having a prediction type of inter-prediction and being edge adjacent to the first block partition;
encodes a third block partition of the picture; and
encodes an explicit signal, the explicit signal indicating a mode for the first block partition, wherein the mode is one of (i) a first mode that identifies the first block partition as being motion compensated by motion vector information of the second block partition, or (ii) a second mode that identifies the first block partition as being motion compensated by motion vector information of the third block partition without motion vector information of the second block partition.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein at least a region of the first block partition overlaps with a region of the second block partition.

### Claim 3 (depends on 1)

The apparatus of claim 1, wherein the processor includes a picture reference store.

### Claim 4 (depends on 1)

The apparatus of claim 1, wherein the processor interacts with a remote client device over a communication network.