Image processing device and method
The present disclosure relates to an image processing device and method which are capable of suppressing an increase in a storage capacity necessary for encoding and decoding. A motion compensating unit that performs motion compensation in decoding of a current layer and a first compressing unit that compresses a motion vector of the current layer that is reconstructed by the motion compensating unit and used for the motion compensation in decoding of another layer are provided. Alternatively, a motion predicting/compensating unit that performs motion prediction and compensation in encoding of a current layer and a first compressing unit that compresses a motion vector of the current layer that is generated by the motion predicting/compensating unit and used in the motion prediction and compensation in encoding of another layer are provided. For example, the present disclosure can be applied to an image processing device.
1. An image processing device, comprising:
motion compensating circuitry configured to performs motion compensation to generate a prediction image;
motion vector compression circuitry configured to compress an inter-layer motion vector of a collocated block in a layer direction using a same compression rate as a temporal motion vector of a collocated block in a temporal direction to generate a compressed motion vector; and
decoding circuitry configured to decode a bit stream using the prediction image.
2. The image processing device according to claim 1 , further comprising:
a memory to store the compressed motion vector.
3. The image processing device according to claim 2 , wherein the motion vector compression circuitry is configured to compress the inter-layer motion vector of the collocated block in the layer direction at 16×16 accuracy.
4. The image processing device according to claim 3 , wherein the motion vector compression circuitry is configured to compress the inter-layer motion vector of the collocated block in the layer direction from 4×4 accuracy to 16×16 accuracy.
5. The image processing device according to claim 3 , wherein the motion vector compression circuitry is configured to compress the inter-layer motion vector of the collocated block in the layer direction from 4×4 accuracy to 8×8 accuracy.
6. The image processing device according to claim 5 , wherein the motion vector compression circuitry is configured to compress the inter-layer motion vector of the collocated block in the layer direction from 8×8 accuracy to 16×16 accuracy.
7. The image processing device according to claim 3 , wherein the motion vector compression circuitry is configured to perform 1/16 compression on the inter-layer motion vector of the collocated block in the layer direction.
8. An image processing method, comprising:
performing motion compensation to generate a prediction image;
compressing an inter-layer motion vector of a collocated block in a layer direction using a same compression rate as a temporal motion vector of a collocated block in a temporal direction to generate a compressed motion vector; and
decoding a bit stream using the prediction image.
9. The image processing method according to claim 8 , further comprising:
storing the compressed motion vector in a memory.
10. The image processing method according to claim 8 , wherein said compressing comprises compressing the inter-layer motion vector of the collocated block in the layer direction at 16×16 accuracy.
11. The image processing method according to claim 10 , wherein said compressing comprises compressing the inter-layer motion vector of the collocated block in the layer direction from 4×4 accuracy to 16×16 accuracy.
12. The image processing method according to claim 10 , wherein said compressing comprises compressing the inter-layer motion vector of the collocated block in the layer direction from 4×4 accuracy to 8×8 accuracy.
13. The image processing method according to claim 12 , wherein said compressing comprises compressing the inter-layer motion vector of the collocated block in the layer direction from 8×8 accuracy to 16×16 accuracy.
14. The image processing method according to claim 10 , wherein said compressing comprises performing 1/16 compression on the inter-layer motion vector of the collocated block in the layer direction.