INTRA-PREDICTION APPARATUS FOR REMOVING A DIRECTIONAL INTRA-PREDICTION MODE FROM A SET OF PREDETERMINED DIRECTIONAL INTRA-PREDICTION MODES
First Claim
1. An intra-prediction apparatus for removing a directional intra-prediction mode of a rectangular video coding block from a set of predetermined directional intra-prediction modes, each predetermined directional intra-prediction mode of the set of predetermined directional intra-prediction modes being associated with a predetermined direction, the rectangular video coding block having a first side and a second side, a length of the first side being greater than a length of the second side, the intra-prediction apparatus comprising:
- a reference sample determining unit configured to select the directional intra-prediction mode from the set of predetermined directional intra-prediction modes, to determine a plurality of available reference samples on the basis of a predetermined direction of the directional intra-prediction mode, the available reference samples extending along the first side of the rectangular video coding block, and to determine a length associated with the plurality of available reference samples;
a directional intra-prediction mode removing unit configured to compare the length of the first side with the length associated with the plurality of available reference samples, and to remove the directional intra-prediction mode from the set of predetermined directional intra-prediction modes if the length associated with the plurality of available reference samples is smaller than a multiple of the length of the first side for obtaining a reduced set of predetermined directional intra-prediction modes; and
an intra-prediction unit configured to intra-predict pixel values of pixels of the rectangular video coding block on the basis of the reduced set of predetermined directional intra-prediction modes.
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Abstract
The disclosure relates to an intra-prediction apparatus for removing a directional intra-prediction mode from a set of predetermined directional intra-prediction modes. The intra-prediction apparatus comprises a reference sample determining unit configured to select the directional intra-prediction mode from the set of predetermined directional intra-prediction modes, and to determine a plurality of available reference samples, a directional intra-prediction mode removing unit configured to remove the directional intra-prediction mode from the set of predetermined directional intra-prediction modes if a length (LRSlonger) associated with the plurality of available reference samples is smaller than a multiple of a length (Llonger) of a first side of the video coding block for obtaining a reduced set, and an intra-prediction unit configured to intra-predict pixel values of pixels of the rectangular video coding block on the basis of the reduced set. The intra-prediction apparatus can further comprise an area determining unit.
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Citations
11 Claims
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1. An intra-prediction apparatus for removing a directional intra-prediction mode of a rectangular video coding block from a set of predetermined directional intra-prediction modes, each predetermined directional intra-prediction mode of the set of predetermined directional intra-prediction modes being associated with a predetermined direction, the rectangular video coding block having a first side and a second side, a length of the first side being greater than a length of the second side, the intra-prediction apparatus comprising:
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a reference sample determining unit configured to select the directional intra-prediction mode from the set of predetermined directional intra-prediction modes, to determine a plurality of available reference samples on the basis of a predetermined direction of the directional intra-prediction mode, the available reference samples extending along the first side of the rectangular video coding block, and to determine a length associated with the plurality of available reference samples; a directional intra-prediction mode removing unit configured to compare the length of the first side with the length associated with the plurality of available reference samples, and to remove the directional intra-prediction mode from the set of predetermined directional intra-prediction modes if the length associated with the plurality of available reference samples is smaller than a multiple of the length of the first side for obtaining a reduced set of predetermined directional intra-prediction modes; and an intra-prediction unit configured to intra-predict pixel values of pixels of the rectangular video coding block on the basis of the reduced set of predetermined directional intra-prediction modes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An intra-prediction method for removing a directional intra-prediction mode of a rectangular video coding block from a set of predetermined directional intra-prediction modes, each predetermined directional intra-prediction mode of the set of predetermined directional intra-prediction modes being associated with a predetermined direction, the rectangular video coding block having a first side and a second side, a length of the first side being greater than a length of the second side, the intra-prediction method comprising:
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selecting the directional intra-prediction mode from the set of predetermined directional intra-prediction modes; determining a plurality of available reference samples on the basis of a predetermined direction of the directional intra-prediction mode, the available reference samples extending along the first side of the rectangular video coding block; determining a length associated with the plurality of available reference samples; comparing the length of the first side with the length associated with the plurality of available reference samples; removing the directional intra-prediction mode from the set of predetermined directional intra-prediction modes if the length associated with the plurality of available reference samples is smaller than a multiple of the length of the first side for obtaining a reduced set of predetermined directional intra-prediction modes; and intra-predicting pixel values of pixels of the rectangular video coding block on the basis of the reduced set of predetermined directional intra-prediction modes. - View Dependent Claims (11)
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Specification