High efficiency video coding device and method based on reference picture type
The present technique relates to an image processing device and method capable of suppressing a decrease in encoding efficiency. The image processing device includes: a predictive vector generating unit that generates a predictive vector of a current parallax vector of a current block used in prediction using correlation in a parallax direction using a reference parallax vector referred when generating a predictive motion vector, when encoding the current parallax vector; and a difference vector generating unit that generates a difference vector between the current parallax vector and the predictive vector generated by the predictive vector generating unit. The present disclosure can be applied to an image processing device.
1. An image processing device comprising:
circuitry configured to:
set a candidate of a predictive vector by setting a co-located vector as unavailable as the candidate of the predictive vector for a coding vector in a current block of a current picture where a reference picture of the coding vector is of a different type of two reference picture types than a reference picture of the co-located vector, wherein the co-located vector is in a co-located block included in a co-located picture of a time different from the current picture but of a same view as the current picture, and wherein the two reference picture types comprise a long-term reference picture type and a short-term reference picture type;
generate the predictive vector in the current block according to the candidate of the predictive vector; and
encode a difference vector between the coding vector and the generated predictive vector.
2. The image processing device according to claim 1 , wherein
the circuitry is further configured to set the candidate of the predictive vector using POC (Picture Order Count) that indicates an output order of pictures.
3. The image processing device according to claim 1 , wherein
the circuitry is further configured to set the co-located vector as unavailable as the candidate of the predictive vector where the coding vector comprises a motion vector having a short-term reference picture and the co-located vector comprises an inter-view vector having a long-term reference picture.
4. The image processing device according to claim 3 , wherein
the circuitry is further configured to set the co-located vector as unavailable as the candidate of the predictive vector where the coding vector comprises an inter-view vector having a long-term reference picture and the co-located vector comprises a motion vector having a short-term reference picture.
5. An image processing method of an image processing device, for allowing the image processing device to execute:
setting a candidate of a predictive vector by setting a co-located vector as unavailable as the candidate of the predictive vector for a coding vector in a current block of a current picture where a reference picture of the coding vector is of a different type of two reference picture types than a reference picture of the co-located vector, wherein the co-located vector is in a co-located block included in a co-located picture of a time different from the current picture but of a same view as the current picture, and wherein the two reference picture types comprise a long-term reference picture type and a short-term reference picture type;
generating the predictive vector in the current block according to the candidate of the predictive vector; and
encoding a difference vector between the coding vector and the generated predictive vector.
6. The image processing device according to claim 1 ,
wherein the circuitry comprises a CPU.
7. The image processing device according to claim 4 , wherein
the circuitry is further configured to encode image data to generate a bit stream including the difference vector.
8. The image processing method according to claim 5 , wherein
setting the candidate of the predictive vector comprises using POC (Picture Order Count) that indicates an output order of pictures.
9. The image processing method according to claim 5 , wherein
setting the co-located vector comprises setting the co-located vector as unavailable as the candidate of the predictive vector where the coding vector comprises a motion vector having a short-term reference picture and the co-located vector comprises an inter-view vector having a long-term reference picture.
10. The image processing method according to claim 9 , wherein
setting the co-located vector further comprises setting the co-located vector as unavailable as the candidate of the predictive vector where the coding vector comprises an inter-view vector having a long-term reference picture and the co-located vector comprises a motion vector having a short-term reference picture.
11. The image processing method according to claim 9 , further comprising:
encoding image data to generate a bit stream including the difference vector.
12. A non-transitory computer-readable storage medium storing instructions that, when executed by at least one processor, cause the at least one processor to perform an image processing method of an image processing device, the method comprising:
setting a candidate of a predictive vector at least by:
in response to determining that a reference picture of a coding vector is of a different type of two reference picture types than a reference picture of a co-located vector, setting a co-located vector as unavailable as the candidate for the coding vector in a current block of a current picture, wherein the co-located vector is in a co-located block included in a co-located picture of a time different from the current picture but of a same view as the current picture, and wherein the two reference picture types comprise a long-term reference picture type and a short-term reference picture type;
generating the predictive vector in the current block according to the candidate of the predictive vector; and
encoding a difference vector between the coding vector and the generated predictive vector.