Concept for encoding data defining coded positions representing a trajectory of an object

摘要

Encoder for encoding data defining coded positions representing a trajectory of an object based on spatio-temporal data representing a time series of positions of the object. The encoder comprises a deriver, a selector, and a coder. The deriver is configured for deriving a plurality of components of a motion vector difference between a last coded motion coded vector pointing from a second last coded position to a last coded position and a current motion vector pointing from the last coded position to a current position of the object. The selector is configured for selecting a component of the plurality of components of the motion vector difference. The coder is configured for coding the current motion vector based on the selected component of the motion vector difference to obtain a current coded motion vector, thereby defining a current coded position.

主权项

1. An encoder for encoding data defining coded positions representing a trajectory of an object based on spatio-temporal data representing a time series of positions of the object, the encoder comprising:
a deriver configured to derive a plurality of components of a motion vector difference between a last coded motion vector pointing from a second last coded position to a last coded position and a current motion vector pointing from the last coded position to a current position of the object; a selector configured to select a component of the plurality of components of the motion vector difference; and a coder configured to code the current motion vector by coding the selected component of the motion vector difference to acquire a current coded motion vector, thereby defining a current coded position, wherein the coder is configured to not code another component or components of the plurality of components of the motion vector difference; wherein the time series of positions of the object are detected by a position sensor, an integrating velocity sensor or a twice-integrating acceleration sensor; the deriver is configured to derive the plurality of components of the motion vector difference such that a first component of the plurality of components corresponds to a first affine component of an affine coordinate system and a second component of the plurality of components corresponds to a second affine component of the affine coordinate system, wherein the affine coordinate system is oriented relative to the last coded motion vector; the affine coordinate system is a three-dimensional coordinate system; the first affine component of the affine coordinate system is a first angle measured relative to the last coded motion vector in a plane spanned by the last coded motion vector and a first vector, and the second affine component of the affine coordinate system is a second angle measured in a plane spanned by the last coded motion vector and a second vector, perpendicular to the first vector; and each of the deriver, the selector, and the coder is implemented using an integrated circuit, a field programmable gate array, or a digital signal processor, or a combination of at least two of the integrated circuit, the field programmable gate array, and the digital signal processor.