IMAGE PROCESSING DEVICE AND IMAGE PROCESSING METHOD

• US 20160005155A1
• Filed: 01/14/2014
• Published: 01/07/2016
• Est. Priority Date: 03/19/2013
• Status: Abandoned Application

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: SATO, KAZUSHI
• Application Number:
  US14/770,875
• Publication Number:
  US 20160005155A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06T 2207/10024 Color image
• CPC Class Codes: G06T 5/10 using non-spatial domain filtering
• CPC Class Codes: H04N 19/132 Sampling, masking or truncation of coding units, e.g. adaptive resampling, frame skipping, frame interpolation or high-frequency transform coefficient masking
• CPC Class Codes: H04N 19/187 the unit being a scalable video layer

Abstract

There is provided an image processing device including an upsampling filter configured to upsample an image of a first layer referred to at a time of decoding of an image of a second layer with a higher space resolution than the first layer, and a control section configured to switch a filter configuration of the upsampling filter for each block of an image.

Claims

1. An image processing device comprising:

an upsampling filter configured to upsample an image of a first layer referred to at a time of decoding of an image of a second layer with a higher space resolution than the first layer; and

a control section configured to switch a filter configuration of the upsampling filter for each block of an image.

2. The image processing device according to claim 1, wherein the control section selects the filter configuration corresponding to encoded or decoded filter configuration information for each block.

3. The image processing device according to claim 1, wherein the control section selects the filter configuration according to strength of a high-pass component of each block for each block.

4. The image processing device according to claim 1, wherein the filter configuration includes a number of filter taps.

5. The image processing device according to claim 1, wherein the upsampling filter upsamples a decoded image of the first layer.

6. The image processing device according to claim 1, wherein the upsampling filter upsamples a predicted error image of the first layer.

7. The image processing device according to claim 2, further comprising:

a decoding section configured to decode the filter configuration information from an encoded stream.

8. The image processing device according to claim 2, further comprising:

an encoding section configured to encode the filter configuration information to an encoded stream.

9. The image processing device according to claim 7, wherein the block is a prediction unit (PU).

10. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component using a size of a transform unit (TU) of the first layer.

11. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component using a quantization parameter of the first layer.

12. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component using a number of nonzero transform coefficients of the first layer.

13. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component using reference direction information in inter prediction of the first layer.

14. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component using a kind of offset in a sample adaptive offset process of the first layer.

15. The image processing device according to claim 3, wherein the control section determines the strength of the high-pass component in regard to each block of the first layer according to whether a smoothing filter is applied according to a selected intra prediction mode.

16. The image processing device according to claim 3, wherein the control section switches the filter configuration of the upsampling filter according to a picture type and the strength of the high-pass component determined for each block.

17. The image processing device according to claim 1, wherein the filter configuration includes a filter coefficient.

18. The image processing device according to claim 1, further comprising:

an inverse quantization section configured to inversely quantize transform coefficient data of the image of the second layer using a quantization matrix defined for an inter prediction mode when the image of the first layer is used as a reference image for intra BL prediction at a time of decoding of the image of the second layer.

19. The image processing device according to claim 4, wherein the control section selects 8 or 7 taps or 4 taps for a luma component and selects 4 taps or 2 taps for a chroma component.

20. An image processing method comprising:

upsampling an image of a first layer referred to at a time of decoding of an image of a second layer with a higher space resolution than the first layer using an upsampling filter; and

switching a filter configuration of the upsampling filter for each block of an image.