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US 10,097,827 B2Granted
Apparatus and method for image encoding, apparatus and method for image decoding, and image transmission system
AssigneeFujitsu Limited
InventorHidenobu Miyoshi
Life of this patent
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Abstract
An image encoding apparatus includes a mode determining unit and an encoding unit. The mode determining unit determines a first operating mode and a second operating mode of an adaptive filter which is applied to a block in an input image in decoding. In this regard, the mode determining unit determines the first operating mode based on a first signal of the input image, and determines the second operating mode based on a second signal of the input image. The encoding unit encodes the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode.
Claims15
An image encoding apparatus comprising:
- a processor configured to perform a procedure including:
- determining a first operating mode and a second operating mode of an adaptive filter that is applied to a block in an input image in decoding, the determining including determining the first operating mode based on a first signal of the input image and determining the second operating mode based on a second signal of the input image, and
- encoding the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode.
An image encoding method comprising:
- determining, by a computer, a first operating mode and a second operating mode of an adaptive filter that is applied to a block in an input image in decoding, the determining including determining the first operating mode based on a first signal of the input image and determining the second operating mode based on a second signal of the input image;
- and
- encoding, by the computer, the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode.
A non-transitory computer-readable storage medium storing an image encoding program that causes a computer to perform a procedure comprising:
- determining a first operating mode and a second operating mode of an adaptive filter that is applied to a block in an input image in decoding, the determining including determining the first operating mode based on a first signal of the input image and determining the second operating mode based on a second signal of the input image;
- and
- encoding the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode.
An image decoding apparatus comprising:
- a processor configured to perform a procedure including:
- extracting, from encoded video data input thereto, a first code and a second code corresponding to a first operating mode and a second operating mode, respectively, of an adaptive filter,
- identifying the first operating mode based on the first code,
- identifying the second operating mode as an operating mode having higher similarities to the identified first operating mode when a bit number of the second code is lower,
- performing a process using the adaptive filter on a first signal of a block in a decoded image reconstructed from the encoded video data according to the identified first operating mode, and
- performing the process using the adaptive filter on a second signal of the block according to the identified second operating mode.
3 more elements
An image decoding method comprising:
- extracting, by a computer, from encoded video data input thereto, a first code and a second code corresponding to a first operating mode and a second operating mode, respectively, of an adaptive filter;
- identifying, by the computer, the first operating mode based on the first code;
- identifying, by the computer, the second operating mode as an operating mode having higher similarities to the identified first operating mode when a bit number of the second code is lower;
- performing, by the computer, a process using the adaptive filter on a first signal of a block in a decoded image reconstructed from the encoded video data according to the identified first operating mode;
- and
- performing, by the computer, the process using the adaptive filter on a second signal of the block according to the identified second operating mode.
3 more elements
A non-transitory computer-readable storage medium storing an image decoding program that causes a computer to perform a procedure comprising:
- extracting, from encoded video data input thereto, a first code and a second code corresponding to a first operating mode and a second operating mode, respectively, of an adaptive filter;
- identifying the first operating mode based on the first code;
- identifying the second operating mode as an operating mode having higher similarities to the identified first operating mode when a bit number of the second code is lower;
- performing a process using the adaptive filter on a first signal of a block in a decoded image reconstructed from the encoded video data according to the identified first operating mode;
- and
- performing the process using the adaptive filter on a second signal of the block according to the identified second operating mode.
3 more elements
An image transmission system comprising:
- an image encoding apparatus configured to generate encoded video data;
- and
- an image decoding apparatus configured to decode the encoded video data,
- wherein the image encoding apparatus includes a first processor configured to perform a procedure including:
- determining a first operating mode and a second operating mode of an adaptive filter that is applied to a block in an input image in decoding, the determining including determining the first operating mode based on a first signal of the input image and determining the second operating mode based on a second signal of the input image, and
- encoding the second operating mode by assigning a code with a lower bit number to the second operating mode when the second operating mode has higher similarities to the first operating mode, and
- the image decoding apparatus includes a second processor configured to perform a procedure including:
- extracting the first code and the second code from the encoded video data,
- identifying the first operating mode based on the first code,
- identifying the second operating mode as an operating mode having higher similarities to the identified first operating mode when a bit number of the second code is lower,
- performing a process using the adaptive filter on a first signal of the block decoded from the encoded video data according to the identified first operating mode, and
- performing the process using the adaptive filter on a second signal of the block according to the identified second operating mode.
9 more elements
Dependencies are inferred from the claim text.