IMAGE PROCESSING DEVICE AND METHOD
First Claim
1. An image processing device, comprising:
- a filter configured to apply a deblocking filter to pixels neighboring a block boundary within a locally decoded image using a filter parameter set based on a quantization parameter, the filter parameter being set to be greater than 12 in case that the quantization parameter is equal to 47; and
an encoder configured to encode an image using the locally decoded image filtered by the deblocking filter to generate an encoded stream,whereinthe filter parameter is used during clipping of filtered pixels output by the deblocking filter, andthe filter parameter being set by a look-up table based on a value of the quantization parameter when the value of the quantization parameter is equal to or less than 53.
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Abstract
An image processing device and method capable of suppressing block noise.
A β LUT_input calculation unit and a clipping unit calculate β LUT_input that is a value input to an existing β generation unit and an extended β generation unit. When the value of β LUT_input qp from the clipping unit is equal to or less than 51, the existing β generation unit calculates β using the LUT defined in the HEVC method and supplies the calculated β to a filtering determination unit. When the value of β LUT_input qp from the clipping unit is larger than 51, the extended β generation unit calculates extended β and supplies the calculated β to the filtering determination unit. The device can be applied to an image processing device, for example.
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Citations
18 Claims
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1. An image processing device, comprising:
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a filter configured to apply a deblocking filter to pixels neighboring a block boundary within a locally decoded image using a filter parameter set based on a quantization parameter, the filter parameter being set to be greater than 12 in case that the quantization parameter is equal to 47; and an encoder configured to encode an image using the locally decoded image filtered by the deblocking filter to generate an encoded stream, wherein the filter parameter is used during clipping of filtered pixels output by the deblocking filter, and the filter parameter being set by a look-up table based on a value of the quantization parameter when the value of the quantization parameter is equal to or less than 53. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10)
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3. The image processing device according to claim :
- 3, wherein the filter is configured to apply the deblocking filter to the pixels within the locally decoded image using the filter parameter set according to an extended range, a range of 12 to 47 being within the extended range.
- View Dependent Claims (4)
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11. An image processing method, comprising:
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applying a deblocking filter to pixels neighboring a block boundary within a locally decoded image using a filter parameter set based on a quantization parameter, the filter parameter being set to be greater than 12 in case that the quantization parameter is equal to 47; and encoding an image using the locally decoded image filtered by the deblocking filter to generate an encoded stream, wherein the filter parameter is used during dipping of filtered pixels output by the deblocking filter, and the filter parameter being set by a look-up table based on a value of the quantization parameter when the value of the quantization parameter is equal to or less than 53. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. An image processing device, comprising:
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circuitry configured to; apply a deblocking filter to pixels neighboring a block boundary within a locally decoded image using a filter parameter set based on a quantization parameter, the filter parameter being set to be greater than 12 in case that the quantization parameter is equal to 47; and encode an image using the locally decoded image filtered by the deblocking filter to generate an encoded image, wherein the filter parameter is used during clipping of filtered pixels output by the deblocking filter, and the filter parameter being set by a look-up table based on a value of the quantization parameter when the value of the quantization parameter is equal to or less than 53.
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Specification